CN1641418A - Liquid crystal display device and driving method - Google Patents
Liquid crystal display device and driving method Download PDFInfo
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- 238000002834 transmittance Methods 0.000 claims description 37
- 238000012856 packing Methods 0.000 claims description 18
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Abstract
This is a kind of display means and display that can compensate the color windage of the front-looking and side-looking images. The screen time series is divided into several subaltern screen time. At first, several emendated gray-rank values are brought from a original gray-rank value of the contraposed image pels. Thereinto the original gray-rank value series is corresponded to a original front-looking and side-looking normalization lighteness. Then in the subaltern screen time, drive the image pels with several voltages respectively corresponding to these emendated gray-rank values. Each of these image times and its corresponding emendated gray-rank value fixes on a emendated front-looking and side-looking normalization lighteness. The summation series of the absolute value of the difference between the emendated front-looking normalization lighteness and the corresponding emendated side-looking one is less than the absolute value of the difference between the original front-looking normalization lighteness and the corresponding original side-looking one.
Description
[technical field]
The invention relates to a kind of display packing and display of complementary color deviation, and particularly face the display packing and the display of the colo(u)r bias of image and side-looking image relevant for a kind of compensation.
[background technology]
Please refer to Fig. 1, its illustrate is the system architecture diagram of conventional liquid crystal.Below below be that 1024 * 768 LCD (LCD Panel) 100 is that example is done explanation with resolution.LCD 100 cordings have in order to drive 1024 * 3 data lines (Data Line) and 768 sweep traces (Scan Line) of 1024 row red picture element, green picture element and blue picture elements.Data line and scanning linear system are respectively by data driver (Data Driver) 102 and 104 drivings of scanner driver (Scan Driver).Data driver device 102 receives many strokes prime number certificate (Pixel Data) PD that is transmitted by controller 106 in regular turn under the control of the data controlling signal Cntl_D that a controller 106 is exported.Data driver 102 is that the picture element data PD that will receive handles, and exports corresponding voltage to drive many data lines of LCD 100.Scanner driver 104 then is under the control of the scan control signal Cntl_S that controller 106 is exported, and output scanning signal in regular turn is to scan every sweep trace in regular turn.Every sweep trace and every data line intersect part, are to define a picture element.After all sweep traces of scanning, all picture ropes will be driven and finish, to finish the demonstration of a picture (frame).
Generally speaking, because the light transmittance when facing LCD 100 with side-looking LCD 100 is also inequality, this be because, the incident light of different angles is in liquid crystal layer, the phasic difference value (Retardation) that is produced is a difference, therefore, when viewing angle not simultaneously, the suffered deviation coefficient of light is inequality, causes penetrance also different.So different visual angles can cause the brightness difference of shown light.And when different color light (for example red light, green light and blue light) when facing with side-looking each with different brightness ratio colour mixtures after, then can produce and face the color different colo(u)r bias phenomenon shown with side-looking.How to reduce the colo(u)r bias when facing, for being one of problem of endeavouring of industry with the side-looking LCD.
[summary of the invention]
In view of this, purpose of the present invention is exactly at the display packing and the display that provide a kind of compensation to face the colo(u)r bias between image and side-looking image, can improve the colo(u)r bias phenomenon effectively, to improve the image quality of display.
According to purpose of the present invention, the display packing that the colo(u)r bias of image and side-looking image is faced in a kind of compensation is proposed, be to be applied in the display.Display is to show a picture in an image time (frame period), and image time system is divided into a plurality of subframe times, and display respectively shows a subframe (sub-frame) in each a little subframe in the time.Display packing of the present invention comprises: at first, the original GTG value at picture element produces a plurality of correction GTG values, and wherein, original GTG value is in being to correspond to an original normalizing light and the original side-looking normalizing light faced.Then, in the time, with the same picture element of a plurality of magnitude of voltage elder generation's rear drives, wherein these voltage systems correspond to these respectively and proofread and correct the GTG value respectively in these subframes.In addition, each these subframe time and corresponding correction GTG value system determines one and faces a normalizing light and a correction side-looking normalizing light.These corrections are faced normalizing light and corresponding these and are proofreaied and correct the summation system of absolute value of difference of side-looking normalizing lights less than the original absolute value of facing the difference of normalizing light and original side-looking normalizing light.
According to another object of the present invention, a kind of display is proposed, display is to show a picture in an image time, and image time system is divided into a plurality of subframe times, and display respectively shows a subframe in each these subframe in the time.Display of the present invention comprises a picture element, a correction GTG value generator and a data driver.Proofread and correct GTG value generator system in order to the original GTG value at picture element, produce a plurality of correction GTG values, wherein, original GTG value is in being to correspond to an original normalizing light L0 and the original side-looking normalizing light L0 ' of facing.Data driver system is used to these subframes in the time, and with the same picture element of a plurality of voltage elder generation's rear drives, wherein these voltage systems correspond to these respectively and proofread and correct the GTG value respectively.In addition, each these subframe time and corresponding correction GTG value system determines one and faces a normalizing light and a correction side-looking normalizing light.These corrections are faced normalizing light and corresponding these and are proofreaied and correct the summation system of absolute value of difference of side-looking normalizing lights less than the original absolute value of facing the difference of normalizing light and original side-looking normalizing light.
According to a further object of the present invention, a kind of display is proposed, display is to show a picture in an image time (frameperiod).Display of the present invention comprises a display panel, a correction GTG value generator and a data driver.Display panel has one first picture element and one second picture element.Proofread and correct GTG value generator system in order at one first original GTG value of first picture element and one second original GTG value of second picture element, produce one first and proofread and correct GTG value and one second correction GTG value.Wherein, first original GTG value system corresponds to one first and originally faces normalizing light La and one first original side-looking normalizing light La ', and the second original GTG value is to correspond to one second original normalizing light Lb and the one second original side-looking normalizing light Lb ' of facing.And data driver system is used in the image time, and respectively with one first voltage and one second driven, first picture element and second picture element, first voltage and second voltage system correspond to first respectively and proofread and correct the GTG value and the second correction GTG value.Wherein, when first picture element during by first driven, the first picture element cording has one first to face normalizing light Lc and one first and proofread and correct side-looking normalizing light Lc '; When second picture element during by second driven, the second picture element cording has one second to face normalizing light Ld and one second and proofread and correct side-looking normalizing light Ld '.Wherein, | Lc-Lc ' |+| Ld-Ld ' |＜| La-La ' |+| Lb-Lb ' |.
According to a further object of the present invention, be to propose a kind of driving method, with visible angle and the colo(u)r bias phenomenon of effective improvement one multi-domain vertical alignment liquid crystal displays (Multi Domain Vertically Aligned LCD).
[description of drawings]
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Fig. 1 illustrates the system architecture diagram into conventional liquid crystal;
Figure 2 shows that the relative position figure of user when the Q point is observed LCD;
Fig. 3 A to Fig. 3 C is respectively red light, green light and blue light in the GTG value of different visual angles and the graph of relation of normalization (normalized) light transmittance;
Fig. 4 illustrates and is the system architecture diagram according to a kind of display of one first embodiment of the present invention;
Fig. 5 A illustrates to traditional as picture element P (i, normalization light transmittance T (%) time history plot when j) being corresponded to the driven of original GTG value, Fig. 5 B illustrates to working as picture element P (i, normalization light transmittance T (%) time history plot when j) being corresponded to the driven of proofreading and correct the GTG value;
Fig. 6 A and Fig. 6 B are the synoptic diagram of adjacent two pictures of traditional monitor;
Fig. 7 is the synoptic diagram of adjacent two pictures of the display of the second embodiment of the present invention; And
Fig. 8 A and Fig. 8 B illustrate the other two kinds of synoptic diagram that different picture elements are arranged that are suitable for the second embodiment of the present invention.
[embodiment]
In LCD, red green blue tricolor produces the degree of colo(u)r bias and inequality when different GTG value.The present invention is the color by will originally showing in a picture element of a picture, two the less colors of colo(u)r bias that are divided into equivalence show in two subframes, or being divided into equivalent two less colors of colo(u)r bias shows in two adjacent picture elements, to reduce the situation of colo(u)r bias.
Please refer to Fig. 2 and Fig. 3 A to Fig. 3 D, wherein, Figure 2 shows that the relative position figure of user when the Q point is observed LCD 200, Fig. 3 A to Fig. 3 C is respectively red light, green light and blue light in the GTG value of different visual angles and the graph of relation of normalization (normalized) light transmittance.GTG value with picture element is that example is done explanation between 0 and 255 below.The normalization light transmittance of facing of any GTG value is the pairing light transmittance of facing of facing light transmittance divided by maximum (if often black (normallyblack) type LCD for example, in GTG value 255) of this GTG value.The normalization light transmittance of the side-looking of any GTG value is the side-looking light transmittance of the pairing side-looking light transmittance of this GTG value divided by maximum gray value (for example being GTG value 255).As shown in Figure 2, the angle of supposing the Z axle of the normal vector on the online and LCD 200 of observation station Q point central point on the LCD 200 is the θ degree, and the Q point in the subpoint on the display panel 200 to LCD on 200 the angle of the online and X-axis of central point be the φ degree, then Fig. 3 A to Fig. 3 C system demonstrates simultaneously as angle (φ, θ) equal (0,0), (0,45) reach (0,60) the GTG value the time and the graph of relation of normalization light transmittance, and demonstrate angle (0,60) poor with the normalization light transmittance of (0,0).Wherein, (on behalf of the user, φ when θ) equaling (0,0), face LCD 200, and (φ, when θ) equaling (0,45) or (0,60), representing the user is 45 degree or 60 degree side-looking LCD 200 with the side-looking angle when angle when angle.
By Fig. 3 A to Fig. 3 C as can be known, different color light is when the same gray level value, and side-looking can be different with the normalization light transmittance of facing, thereby cause colo(u)r bias; And when the GTG value near 0 or 255 the time, side-looking is less with the difference of the normalization light transmittance of facing, and is to approach 0%.Therefore, with original GTG value 128 is example, proofread and correct the GTG value if can find out one group, its side-looking is also littler with the difference of the normalization light transmittance of facing than the side-looking of original GTG value 128 with the difference of the normalization light transmittance of facing, and in the time of allowing the user face LCD again, can obtain identical brightness, this group is proofreaied and correct the GTG value just can make LCD reduce in the colo(u)r bias of side-looking with positive apparent time.
Embodiment one
First embodiment of the present invention system goes up the mode that changes the GTG value with time domain (time domain) and reaches purpose of the present invention.The display packing of the colo(u)r bias of image and side-looking image is faced in the compensation of the first embodiment of the present invention, is to be applied in the display, and for example be LCD.Please refer to Fig. 4, its illustrate is the system architecture diagram according to a kind of LCD of one first embodiment of the present invention.LCD includes a plurality of picture elements, a plurality of data driver 402, a plurality of scanner driver 404 and a controller 406.Controller 406 comprises that more one proofreaies and correct GTG value generator 407.(i j) does explanation for example, and (i j) is arbitrary picture element of LCD to picture element P, and i and j are positive integer with picture element P below.LCD is to show a picture in an image time (frame period) FP.In the present invention, image time FP system is divided into n subframe time SFP1～SFPn, and n is the positive integer greater than 1.LCD respectively shows a subframe (sub-frame) in each subframe in the time.Suppose picture element P (i, j) the original GTG value in picture be GR0 (i, j).Proofreading and correct in the GTG value generator 407 is to store a data table of comparisons (Look Up Table), and this data table of comparisons system is writing down all original GTG value GR0 and at least one group of its pairing correction GTG value GR1～GRn.Proofread and correct GTG value generator 407 and be in order to by the data query table of comparisons, at picture element P (i, original GTG value GR0 j) (i j), produces n correction GTG value, comprise correction GTG value GR1 (i, j), GR2 (i, j) ... GRn (i, j).Proofreading and correct the GTG value for this n will input in the corresponding data driver 402 in regular turn when showing each subframe.
Equaling 2 with n below is that example is done explanation.Please refer to Fig. 5 A and Fig. 5 B, wherein, Fig. 5 A illustrates to traditional as picture element P (i, normalization light transmittance T (%) time history plot when j) being corresponded to the driven of original GTG value GR0, Fig. 5 B illustrates to working as picture element P (i, normalization light transmittance T (%) time history plot when j) being corresponded to the driven of proofreading and correct GTG value GR1 and GR2.Image time FP system be divided into one for the first time image time SFP1 with one the second time image time SFP2.For the first time image time SFP1 and first proofread and correct GTG value GR1 (i, j) be determine one first face normalizing light L1 (i, j) and one first correction side-looking normalizing light L1 ' (i, j); For the second time image time SFP2 and second proofread and correct GTG value GR2 (i, j) be correspond to one second face normalizing light L2 (i, j) and one second correction side-looking normalizing light L2 ' (i, j).Wherein, | L1 (i, j)-L1 ' (i, j) |+| L2 (i, j)-L2 ' (i, j) |＜| L0 (i, j)-L0 ' (i, j) |.
Please refer to Fig. 5 A, traditional in an image time FP, be with correspond to original GTG value GR0 (i, driven picture element P j) (i, j).At this moment, face that (i, the normalization light transmittance of light is respectively T0 (t) to the function of time and T0 ' (t) in the time of j) with side-looking picture element P.And original face normalizing light L0 (i, j) for normalization light transmittance T0 (t) in image time FP to the integrated value of time.In like manner, original side-looking normalizing light L0 ' (i, j) be, normalization light transmittance T0 ' (t) in image time FP to the integrated value of time.
Shown in Fig. 5 B, the present invention in first time image time SFP1, be with correspond to first proofread and correct GTG value GR1 (i, driven picture element P j) (i, j).At this moment, (i, the normalization light transmittance of light is respectively T1 (t) to the function of time and T1 ' (t) in the time of j) with side-looking picture element P when facing.And in second time image time SFP2, be with correspond to second proofread and correct GTG value GR2 (i, driven picture element P j) (i, j).At this moment, face that (i, the normalization light transmittance of light is respectively T2 (t) to the function of time and T2 ' (t) in the time of j) with side-looking picture element P.Similarly, of the present invention first faces normalizing light L1 (i, j) be, as picture element P (i, j) be subjected to corresponding to first and proofread and correct GTG value GR1 (i, during j) driven, face picture element P (i, the normalization light transmittance T1 (t) in the time of j) in first time image time SFP1 to the integrated value of time.First proofreaies and correct side-looking normalizing light L1 ', and (i j) is, as picture element P (i, j) be subjected to corresponding to first and proofread and correct GTG value GR1 (I, during j) driven, side-looking picture element P (i, the normalization light transmittance T1 ' in the time of j) (t) in the first time image time SFP1 to the integrated value of time.Second faces normalizing light L2, and (i j) is, as picture element P (i, j) be subjected to corresponding to second and proofread and correct GTG value GR2 (i, during j) driven, face picture element P (i, the normalization light transmittance T2 (t) in the time of j) in second time image time SFP2 to the integrated value of time.Second proofreaies and correct side-looking normalizing light L2 ', and (i j) is, as picture element P (i, j) be subjected to corresponding to second and proofread and correct GTG value GR2 (i, during j) driven, side-looking picture element P (i, the normalization light transmittance T2 ' in the time of j) (t) in second time image time SFP2 to the integrated value of time.
Since selected go out first proofread and correct GTG value GR1 (i, j) and second proofread and correct GTG value GR2 (i j) is the correction GTG value that satisfies following formula: | L1 (i, j)-L1 ' (i, j) |+| L2 (i, j)-L2 ' (i, j) |＜| L0 (i, j)-L0 ' (i, j) |.So, when the user observes picture element P (i, j) time, for the first time corresponding in the image time SFP1 first proofreaied and correct GTG value GR1 (i, j) the positive angle and the normalizing light of side-looking angle poor, second proofread and correct GTG value GR2 (i with corresponding in second time image time SFP2, the accumulative effect of the difference of the positive angle j) and the normalizing light of side-looking angle, system corresponds to original GTG value GR0 (i, positive angle j) and the normalizing light of side-looking angle poor less than conventional practice in an image time FP.So the present invention can make picture element P effectively, and (i, colo(u)r bias j) lowers.
Moreover, preferably, the first correction GTG value GR1 (i that the present invention is selected, j) and second proofread and correct GTG value GR2 (i, j) pairing first face normalizing light L1 (i, j) with second face normalizing light L2 (i, j) sum equal haply original face normalizing light L0 (i, j).So, when the user observes picture element P (i, j) time, picture element P (i, j) brightness is that corresponding in first time image time SFP1 first proofreaied and correct GTG value GR1 (i, j) brightness second is proofreaied and correct GTG value GR2 (it can be approached the brightness that corresponds to original GTG value GR0 that is produced of picture element in an image time FP of conventional practice for i, the accumulative effect of brightness j) with corresponding in second time image time SFP2.
In addition, for the first time image time SFP1 and image time SFP2 for the second time preferably be image time FP partly.Original GTG value GR0 (i, j) be between first proofread and correct GTG value GR1 (i, j) and second proofread and correct GTG value GR2 (i, j) between, and first proofread and correct GTG value GR1 (i, j) preferably be greater than second proofread and correct GTG value GR2 (i, j).For instance, measure via instrument, (i, original GTG value j) is 128 o'clock, can select first to proofread and correct GTG value GR1 (i is 190 j), and second proofread and correct GTG value GR2 (i is 0 j), and can suppose SFP1=SFP2=(1/2) FP as blue picture element P.By Fig. 5 B as can be known, transfer original GTG value 128 to first and proofread and correct GTG value 190 and second and proofread and correct after the GTG value 0, the absolute value of the difference of the normalizing light that its positive angle and side-looking 60 are spent will be less than original GTG value 128.Hence one can see that, and LCD of the present invention is when facing with side-looking, and the difference of picture element brightness is little than conventional liquid crystal really, so the present invention can improve the phenomenon of colo(u)r bias really effectively.
Wherein, the absolute value of the difference of the normalization light transmittance of the positive angle of GTG value 0 and side-looking 60 degree is very little, is specially adapted to proofread and correct the GTG value as second.When the present invention is used in the liquid crystal mesogens display, can make LCD in image time FP, reach the brightness of equivalence by first and second continuously dynamic switching of proofreading and correct the GTG value, with correct show image, for example, when original GTG value is 128, first, second proofreaies and correct the GTG value can be respectively (190,0) or (0,190).
The choosing of the data table of comparisons under this embodiment: fix an original GTG value GR0 (i, j), measure pairing original face normalizing light L0 (i, j).For the benefit of implement, most preferred embodiment is that the original picture face time is divided into two identical subframe times.Since GTG 0 rank face permeability variations minimum with side-looking, and reduce the reaction time of liquid crystal drive, select GTG 0 and be used as second and proofread and correct the GTG value.Because the liquid crystal drive characteristic is not to be a fixed blocks ripple, therefore need to adjust first and proofread and correct that the GTG value is proofreaied and correct the GTG value with second so that pairing first face normalizing light L1 (i during actual driving, j) face normalizing light L2 (i with second, j) sum equal haply original face normalizing light L0 (i, j); For the first time corresponding in the image time SFP1 first proofreaied and correct GTG value GR1 (i, j) the positive angle and the normalizing light of side-looking angle poor, second proofread and correct GTG value GR2 (i with corresponding in second time image time SFP2, the accumulative effect of the difference of the positive angle j) and the normalizing light of side-looking angle, system corresponds to original GTG value GR0 (i, positive angle j) and the normalizing light of side-looking angle poor less than conventional practice in an image time FP.With this method each GTG value pairing first is proofreaied and correct after the GTG value calculates with the second correction GTG value, and form a data table of comparisons.
Second embodiment
Second embodiment of the present invention system goes up the mode that changes the GTG value with spatial domain (space domain) and reaches purpose of the present invention.The display that compensates the colo(u)r bias of facing image and side-looking image of the present invention, system shows a picture in an image time (frame period) FP.This display can be LCD.LCD includes a display panels, a plurality of data driver, a plurality of scanner driver and a controller.Cording has a plurality of picture elements on the display panels, and controller comprises that more one proofreaies and correct GTG value generator.Be that example is done explanation with the first picture element Pa and the second picture element Pb below.Proofread and correct GTG value generator system in order at the one first original GTG value GRa0 of the first picture element Pa and the one second original GTG value GRb0 of the second picture element Pb, produce one first and proofread and correct GTG value GRa1 and one second correction GTG value GRb1.Wherein, first original GTG value GRa0 system corresponds to one first and originally faces normalizing light La and one first original side-looking normalizing light La ', and the second original GTG value GRb0 is in being to correspond to one second original normalizing light Lb and the one second original side-looking normalizing light Lb ' of facing.
Data driver system is used in the image time FP, respectively with one first voltage and one second driven, the first picture element Pa and the second picture element Pb.First voltage and second voltage system correspond to first respectively and proofread and correct the GTG value GRa1 and the second correction GTG value GRb1.Wherein, as the first picture element Pa during by first driven, the first picture element Pa cording has one first to face normalizing light Lc and one first and proofread and correct side-looking normalizing light Lc '; As the second picture element Pb during by second driven, the second picture element Pb cording has one second to face normalizing light Ld and one second and proofread and correct side-looking normalizing light Ld '.Wherein, | Lc-Lc ' |+| Ld-Ld ' |＜| La-La ' |+| Lb-Lb ' |.
Proofreading and correct GTG value generator cording has a data table of comparisons, proofreaies and correct GTG value generator system and produces the first correction GTG value GRa1 and the second correction GTG value GRb1 by the data query table of comparisons.This data table of comparisons system is writing down the first original GTG value GRa0 and the second original GTG value GRb0 and pairing first proofreaies and correct the GTG value GRa1 and the second correction GTG value GRb1.
The first picture element Pa and the second picture element Pb are adjacent, and the first picture element Pa and the second picture element Pb are the picture element of same color.The first original GTG value GRa0 and the second original GTG value GRb0 all proofread and correct GTG value GRa1 and second between first to proofread and correct between the GTG value GRb1.First faces normalizing light Lc and second faces normalizing light Ld sum system and equals the first original normalizing light La and the second original normalizing light Lb sum of facing faced haply.
Lift an example below with explanation.Please refer to Fig. 6 A, Fig. 6 B and Fig. 7, wherein, Fig. 6 A and Fig. 6 B are the synoptic diagram of adjacent two pictures of conventional liquid crystal, and Fig. 7 is the synoptic diagram of the LCD of the second embodiment of the present invention.Red picture element, green picture element and blue picture element system are respectively with R, G and B representative.Generally speaking, the original GTG value of contiguous picture element is comparatively approaching usually, and is suitable for using the second embodiment of the present invention.Being all 128 with the original GTG value of adjacent blue picture element B11 and B21 below is that example is done explanation.When the original GTG value GRa0 of blue picture element B11 and B21 and GRb0 were 128, can selecting first, to proofread and correct GTG value GRa1 be 174, and second to proofread and correct GTG value GRb1 be 0.So, shown in Fig. 7 A, will be respectively 174 and 0 in the GTG value of blue picture element B11 of the present invention and B21.And in next picture, the GTG value of blue picture element B11 and B21 will transfer 0 and 174 respectively to.
As shown in Figure 7, between variant color picture element between apart from bigger, so another embodiment of the present invention also can be applicable to the picture element array that multitude of different ways is arranged.Please refer to Fig. 8 A and Fig. 8 B, it illustrates to being suitable for other two kinds of synoptic diagram that different picture elements are arranged of the second embodiment of the present invention.The picture element arrangement mode that the present invention was suitable for is except same delegation picture element shown in Figure 7 is arrangement mode with the picture element of color, picture element also can be shown in Fig. 8 A, what allow some two laterally adjacent picture element is same color, for example with the series arrangement of GRBBRG.The arrangement mode system of each row can be being staggered of different order, for example adjacent two putting in order of row are respectively the order of GRBBRG and BRGGRB, with this embodiment, picture element G has adjacent identical picture element with picture element B, between at least two monochromatic picture elements between (G and B) apart from can reducing.In addition, the arrangement mode of picture element also can be configured to make two picture elements haply along the adjacent arrangement of direction at the diagonal angle of display panels, shown in Fig. 8 B.In Fig. 8 B, red picture element R and blue picture element B system is arranged side by side along horizontal direction, and green picture element G system be disposed at red picture element R and blue picture element B above or below.Green picture element G is disposed at the mode of the top of red picture element R and blue picture element B, and the mode that green picture element G system is disposed at side under red picture element R and the blue picture element B is staggered the appearance, so that the picture element of same color is adjacent along cornerwise direction of display panels, so the spacing between each monochromatic picture element can reduce, and will help the raising of resolution as the picture element arrangement mode of Fig. 8 A and Fig. 8 B.
The display packing and the display of the colo(u)r bias of image and side-looking image faced in the disclosed compensation of the above embodiment of the present invention, system can improve the colo(u)r bias phenomenon effectively, to improve the image quality of display, wherein, can reach preferable effect to be applied to a multi-domain vertical alignment liquid crystal displays (Multi Domain Vertically Aligned LCD) again.In addition, the present invention can be performed in all picture elements of LCD, also can only implement at specific picture element, all can reach the effect of improving the aberration phenomenon.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any personnel that have the knack of this technical field; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when the institute according to claims define.
Claims (23)
1. display packing that is applied to a LCD, this LCD is to show a picture in an image time (frame period), wherein this image time system may be partitioned into a plurality of subframe times, and this display respectively shows a subframe (sub-frame) in each those subframe in the time, this display packing comprises:
(a) at an original GTG value of this picture element, produce a plurality of correction GTG values, wherein, this original GTG value is in being to correspond to an original normalizing light L0 and the original side-looking normalizing light L0 ' of facing; And
(b) in those subframes in the time, respectively with this picture element of a plurality of driven, those voltage systems correspond to those and proofread and correct the GTG value, wherein, each should corrections GTG value system determine one and face a normalizing light and a correction side-looking normalizing light with corresponding those subframe times, and the summation that normalizing light and the absolute value of the difference of corresponding those correction side-looking normalizing lights are faced in those corrections is less than this original absolute value of facing the difference of normalizing light and this original side-looking normalizing light.
2. display packing according to claim 1, it is characterized in that, in this step (b), system produces those by the inquiry one data table of comparisons (Look Up Table) and proofreaies and correct the GTG value, and this data table of comparisons system is writing down this original GTG value and pairing at least one group of those correction GTG value.
3. display packing according to claim 1, it is characterized in that, this image time system be divided into one for the first time image time with one the second time image time, those are proofreaied and correct GTG values system and comprise that one first proofreaies and correct the GTG value and proofreaies and correct the GTG value with one second, and this first time, image time was to determine one first to face normalizing light L1 and one first correction side-looking normalizing light L1 ' with this first correction GTG value; This second time image time and this second proofread and correct GTG value system and correspond to one second and face normalizing light L2 and one second correction side-looking normalizing light L2 '; Wherein, | L1-L1 ' |+| L2-L2 ' |＜| L0-L0 ' |.
4. display packing according to claim 3, it is characterized in that, this first is faced normalizing light L1 system and is relevant to, when this picture element is subjected to corresponding to this first when proofreading and correct the driven of GTG value, the normalization light transmittance when facing this picture element in this image time first time to the integrated value of time; This first is proofreaied and correct side-looking normalizing light L1 ' and is relevant to, when this picture element is subjected to corresponding to this first when proofreading and correct the driven of GTG value, the normalization light transmittance during this picture element of side-looking in this for the first time in the image time to the integrated value of time; This second is faced normalizing light L2 system and is relevant to, when this picture element is subjected to corresponding to this second when proofreading and correct the driven of GTG value, the normalization light transmittance when facing this picture element in this image time second time to the integrated value of time; This second is proofreaied and correct side-looking normalizing light L2 ' and is relevant to, when this picture element is subjected to corresponding to this second when proofreading and correct the driven of GTG value, the normalization light transmittance during this picture element of side-looking in this for the second time in the image time to the integrated value of time.
5. display packing according to claim 2 is characterized in that, this for the first time image time be half of this image time.
6. display packing according to claim 2 is characterized in that, this original GTG value is between this first correction GTG value and this second correction GTG value.
7. display packing according to claim 2 is characterized in that, this first is faced normalizing light L1 and this second and face normalizing light L2 sum system and equal this original normalizing light L0 that faces haply.
8. display, this display are to show a picture in an image time, and this image time system is divided into a plurality of subframe times, and this display respectively shows a subframe in each those subframe in the time, and this display comprises:
At least one picture element;
One proofreaies and correct GTG value generator, is in order to the original GTG value at this picture element, produces a plurality of correction GTG values, and wherein, this original GTG value is in being to correspond to an original normalizing light L0 and the original side-looking normalizing light L0 ' of facing; And
One data driver, system is used to those subframes in the time, respectively with this picture element of a plurality of driven, those voltage systems correspond to those and proofread and correct the GTG value, wherein, each should corrections GTG value system determine one and face a normalizing light and a correction side-looking normalizing light with corresponding those subframe times, and the summation that normalizing light and the absolute value of the difference of corresponding those correction side-looking normalizing lights are faced in those corrections is less than this original absolute value of facing the difference of normalizing light and this original side-looking normalizing light.
9. display according to claim 8, it is characterized in that, this correction GTG value generator cording has a data table of comparisons (Look Up Table), this correction GTG value generator system produces those correction GTG values by inquiring about this data table of comparisons, and this data table of comparisons system is writing down this original GTG value and pairing at least one group of those correction GTG value.
10. display according to claim 8, it is characterized in that, this image time system be divided into one for the first time image time with one the second time image time, those are proofreaied and correct GTG values system and comprise that one first proofreaies and correct the GTG value and proofreaies and correct the GTG value with one second, and this first time, image time was to determine one first to face normalizing light L1 and one first correction side-looking normalizing light L1 ' with this first correction GTG value; This second time image time and this second proofread and correct GTG value system and correspond to one second and face normalizing light L2 and one second correction side-looking normalizing light L2 '; Wherein, | L1-L1 ' |+| L2-L2 ' |＜| L0-L0 ' |.
11. display according to claim 10, it is characterized in that, this first is faced normalizing light L1 system and is relevant to, when this picture element is subjected to corresponding to this first when proofreading and correct the driven of GTG value, the normalization light transmittance when facing this picture element in this image time first time to the integrated value of time; This first is proofreaied and correct side-looking normalizing light L1 ' and is relevant to, when this picture element is subjected to corresponding to this first when proofreading and correct the driven of GTG value, the normalization light transmittance during this picture element of side-looking in this for the first time in the image time to the integrated value of time; This second is faced normalizing light L2 system and is relevant to, when this picture element is subjected to corresponding to this second when proofreading and correct the driven of GTG value, the normalization light transmittance when facing this picture element in this image time second time to the integrated value of time; This second is proofreaied and correct side-looking normalizing light L2 ' and is relevant to, when this picture element is subjected to corresponding to this second when proofreading and correct the driven of GTG value, the normalization light transmittance during this picture element of side-looking in this for the second time in the image time to the integrated value of time.
12. display according to claim 9 is characterized in that, this for the first time image time be half of this image time.
13. display according to claim 9 is characterized in that, this original GTG value is between this first correction GTG value and this second correction GTG value.
14. display according to claim 9 is characterized in that, this first is faced normalizing light L1 and this second and faces normalizing light L2 sum system and equal this original normalizing light L0 that faces haply.
15. a display, this display are to show a picture in an image time (frame period), this display comprises:
One display panel, cording have one first picture element and one second picture element;
One proofreaies and correct GTG value generator, system is in order at one first original GTG value of this first picture element and one second original GTG value of this second picture element, produce one first and proofread and correct GTG value and one second correction GTG value, wherein, this first original GTG value is to correspond to one first original normalizing light La and the one first original side-looking normalizing light La ' of facing, and this second original GTG value is to correspond to one second original normalizing light Lb and the one second original side-looking normalizing light Lb ' of facing; And
One data driver, system is used in this image time, respectively with one first voltage and this first picture element of one second driven and this second picture element, this first voltage and this second voltage system correspond to this first correction GTG value and this second correction GTG value respectively, wherein, when this first picture element during by this first driven, this first picture element cording has one first to face normalizing light Lc and one first and proofread and correct side-looking normalizing light Lc '; When this second picture element during by this second driven, this second picture element cording has one second to face normalizing light Ld and one second and proofread and correct side-looking normalizing light Ld ';
Wherein, | Lc-Lc ' |+| Ld-Ld ' |＜| La-La ' |+| Lb-Lb ' |.
16. display according to claim 15, it is characterized in that, this correction GTG value generator cording has a data table of comparisons (Look Up Table), this correction GTG value generator is to produce this first correction GTG value and this second correction GTG value by inquiring about this data table of comparisons, and this data table of comparisons system is writing down this first original GTG value and this second original GTG value and pairing this first correction GTG value and this second correction GTG value.
17. display according to claim 15 is characterized in that, this first picture element and this second picture element are adjacent, and this first picture element and this second picture element are same color.
18. display according to claim 15 is characterized in that, this first picture element and this second picture element system is haply along the adjacent arrangement of direction at the diagonal angle of this display panel, and this first picture element and this second picture element are same color.
19. display according to claim 15 is characterized in that, this first original GTG value and this second original GTG value are all between this first correction GTG value and this second correction GTG value.
20. display according to claim 15, it is characterized in that this first is faced normalizing light Lc and this second and face normalizing light Ld sum and equal this first original normalizing light La and this second original normalizing light Lb sum of facing faced haply.
21. a display packing that is applied to a LCD comprises:
(a) at an original GTG value of one first picture element, produce a plurality of correction GTG values, it is characterized in that, this original GTG value is in being to correspond to an original normalizing light L0 and the original side-looking normalizing light L0 ' of facing; And
(b) respectively with this first picture element of a plurality of driven, those voltage systems correspond to those and proofread and correct the GTG value, wherein, each should corrections GTG value system determine one and face a normalizing light and a correction side-looking normalizing light with corresponding those subframe times, and the summation that normalizing light and the absolute value of the difference of corresponding those correction side-looking normalizing lights are faced in those corrections is less than this original absolute value of facing the difference of normalizing light and this original side-looking normalizing light.
22. display packing according to claim 21, it is characterized in that, this LCD is to show a picture in an image time (frame period), wherein, this image time system may be partitioned into a plurality of subframe times, and this display respectively shows a subframe (sub-frame) in each those subframe in the time, in this step (b), lie in those subframes in the time, respectively with this first picture element of those driven.
23. display packing according to claim 21, it is characterized in that, this LCD is to show a picture in an image time (frame period), this LCD more comprises second picture element that at least one is adjacent with this first picture element, in this step (b), in this image time, system selects one to drive this first picture element from those voltages, and with those second picture elements of remaining those driven, in next image time, system selects one in addition driving this first picture element from those voltages, and with those second picture elements of remaining those driven.
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| CNB2004100016400A CN100454086C (en) | 2004-01-07 | 2004-01-07 | Liquid crystal display device and driving method |
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