CN103258507A - Driving method of liquid crystal display - Google Patents
Driving method of liquid crystal display Download PDFInfo
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- CN103258507A CN103258507A CN2012100345741A CN201210034574A CN103258507A CN 103258507 A CN103258507 A CN 103258507A CN 2012100345741 A CN2012100345741 A CN 2012100345741A CN 201210034574 A CN201210034574 A CN 201210034574A CN 103258507 A CN103258507 A CN 103258507A
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Abstract
The invention provides a driving method of a liquid crystal display. The driving method includes the following steps of in the first picture frame time, starting a first light source and supplying gray scale data of a first picture frame to a liquid crystal display panel, in the second picture frame time, starting a second light source and supplying gray scale data of a second picture frame to the liquid crystal display panel, in the third picture frame time, starting the first light source, the second light source and a third light source and supplying gray scale data of a third picture frame to a liquid crystal display panel. By means of the driving method of the liquid crystal display, a color separation phenomenon of a color sequence type liquid crystal display.
Description
Technical field
The present invention relates to a kind of driving method of liquid crystal indicator, particularly relate to the driving method of a kind of colors sequence type (Field Color Sequential) LCD.
Background technology
(Liquid Crystal Display LCD) is to use white backlight to the available liquid crystal display, and needs to cooperate not homochromy colored filters such as R, G, B to reach the effect that color shows.Relatively, colors sequence type (Color Sequential) LCD can not need be used optical filter, and use the light source of R, G, B three looks luminous in regular turn in the time of a picture frame (frame), it utilizes the persistence of vision phenomenon of human eye and three kinds of coloured light is carried out colour mixture, to reach the effect that color shows.
Yet color sequence liquid crystal display has the look segregation phenomenon easily, and (color breakup, CBU), it has a strong impact on the display quality of display.At present, one of method of improving the look segregation phenomenon is to improve the renewal frequency of picture, but the method is subject to the reaction time of liquid crystal, and can't significantly improve the renewal frequency of picture, and can increase the operation power consumption of display.The method that another kind improves the look segregation phenomenon is to insert white picture or black picture in not homochromy picture, to slow down the look segregation phenomenon.But the method need be used extra hardware and improve picture update rate (frame rate) and reach, and can influence the color saturation of image.
So, be necessary to provide a kind of driving method of liquid crystal indicator, to solve the existing in prior technology problem.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of driving method of liquid crystal indicator, and described driving method comprises the steps:
A. receive the original luma data of input image data;
B. calculate first opening time and second opening time according to original GTG signal;
C. according to described first opening time and described second opening time, change described original luma data for showing luma data;
D. at described first time of picture frame in the time, open first light source, and at described second time of picture frame in the time, open secondary light source;
E. open the 3rd light source at picture frame for the third time in the time, and open described first light source and described secondary light source according to described first opening time, described second opening time simultaneously; And
F. in the described picture frame time first time, the described picture frame time second time and the described time of picture frame for the third time, provide described demonstration luma data after the conversion to display panels.
In one embodiment of this invention, described step B comprises the steps: to judge the maximum gray value (Rmax, Gmax, Bmax) and minimum gray value (Rmin, Gmin, Bmin) in the described original luma data.
In one embodiment of this invention, described step B also comprises the steps: to set the value of color sensitivity weight coefficient (α, β, γ).
In one embodiment of this invention, described step B also comprises the steps: to calculate the value of following equation: (β Rmax/Gmin+ γ Rmax/Bmin), and corresponding to red time picture frame; (α Gmax/Rmin+ γ Gmax/Bmin) is corresponding to green time picture frame; And (α Bmax/Rmin+ β Bmax/Gmin), corresponding to blue time picture frame.
In one embodiment of this invention, described step B also comprises the steps: to judge first value in the described equation, second value and minimum value.
In one embodiment of this invention, described step B also comprises the steps: according to described equational described first value and described second value, determine described first time of picture frame color and described second time picture frame color; And according to described equational described minimum value, determine the color of described picture frame for the third time.
In one embodiment of this invention, described step B also comprise the steps: with in the described picture frame for the third time maximum gray value, described first time in the picture frame the minimum gray value and the described minimum gray value in the described second time picture frame be converted to penetration.
In one embodiment of this invention, described step B also comprises the steps: the described minimum gray value in the described first time picture frame divided by the described maximum gray value in the described picture frame for the third time, to calculate the first opening time ratio; And with the described minimum gray value in the described second time picture frame divided by the described maximum gray value in the described picture frame for the third time, to calculate the second opening time ratio.
In one embodiment of this invention, described step B also comprises the steps: the described picture frame time first time is taken advantage of in the described first opening time ratio, to calculate described first opening time; And will take advantage of in the described second opening time ratio picture frame time second time, to calculate described second opening time.
In one embodiment of this invention, described step C comprises the steps: other GTG value in the described picture frame for the third time is converted to penetration; And with the penetration after described other GTG value conversion, multiply by the described first opening time ratio and the described second opening time ratio, to calculate described first light source and described secondary light source shared brightness contribution in the described time of picture frame for the third time.
In one embodiment of this invention, described step C also comprises the steps: other GTG value in described first time picture frame and the described second time picture frame is converted to penetration.
In one embodiment of this invention, described step C also comprise the steps: with described first time picture frame and described second time picture frame corresponding penetration, deduct described first light source and described secondary light source shared brightness contribution in the described time of picture frame for the third time, to calculate described first time of picture frame and the penetration of the described picture frame second time after compensation.
In one embodiment of this invention, described step C also comprises the steps: the penetration after compensation in described first time picture frame and the described second time picture frame is converted to the GTG value after compensation.
In one embodiment of this invention, described driving method also comprises the steps: the maximum penetration degree in described first time picture frame and the penetration of the described picture frame second time after compensation, multiply by respectively described first time picture frame and described second time picture frame the penetration ratio, be adjusted into maximum critical penetration degree; And other penetration in described first time picture frame and the penetration of the described picture frame second time after compensation adjusted according to equal proportion ground.
In one embodiment of this invention, described driving method also comprises the steps: described first time picture frame and the penetration of the described picture frame second time after adjusting are converted to the GTG value after compensation.
In one embodiment of this invention, described driving method also comprise the steps: with the described picture frame time first time and the described picture frame time second time divided by described first time picture frame and described second time picture frame described penetration ratio, to shorten the described picture frame time first time and the described picture frame time second time.
In one embodiment of this invention, described driving method also comprises the steps: the described picture frame time first time and the described picture frame time second time are scattered in respectively in the described time of picture frame for the third time equably.
Another object of the present invention is to provide a kind of driving method of liquid crystal indicator, described driving method comprises the steps:
At the first time of picture frame in the time, open first light source, and the luma data that picture frame for the first time is provided is to display panels;
At the second time of picture frame in the time, open secondary light source, and the luma data that picture frame for the second time is provided is to described display panels; And
Open described first light source, described secondary light source and the 3rd light source at picture frame for the third time in time, and the luma data that picture frame for the third time is provided is to described display panels.
In one embodiment of this invention, described driving method also comprises the steps: to shorten the described picture frame time first time and the described picture frame time second time.
In one embodiment of this invention, described driving method also comprised the steps: in the described time of picture frame for the third time, disperseed to open described first light source and described secondary light source equably.
The driving method of liquid crystal indicator of the present invention can be opened a plurality of not homochromy light sources simultaneously according to the GTG value of input image in a picture frame of picture frame, and the image gray scale value of adjustment demonstration accordingly, to improve look segregation phenomenon (CBU), and can not need increase slightly outer hardware and reach the color saturation of sacrificing image, thereby can guarantee cost of products and the display quality of liquid crystal indicator simultaneously.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 shows the synoptic diagram according to the liquid crystal indicator of the first embodiment of the present invention.
Fig. 2 shows the synoptic diagram according to the light source of the backlight module of the first embodiment of the present invention.
Fig. 3 shows the process flow diagram according to the driving method of liquid crystal indicator of the present invention.
Fig. 4 shows the method detailed process flow diagram according to the driving method of liquid crystal indicator of the present invention.
Fig. 5 shows the synoptic diagram according to original luma data and the original opening time data of the first embodiment of the present invention.
Fig. 6 shows the synoptic diagram according to judgement maximum gray value and the minimum gray value of the first embodiment of the present invention.
Fig. 7 shows the synoptic diagram that the GTG value is converted to penetration according to the first embodiment of the present invention.
Fig. 8 shows the synoptic diagram that is converted to penetration according to other GTG value in the picture frame for the third time of the first embodiment of the present invention.
Fig. 9 shows the synoptic diagram according to other photochromic shared brightness contribution in picture frame for the third time of the calculating of the first embodiment of the present invention.
Figure 10 shows the synoptic diagram that the GTG value of other time picture frame is converted to penetration according to the first embodiment of the present invention.
Figure 11 shows the synoptic diagram according to the penetration of calculating after compensation of the first embodiment of the present invention.
Figure 12 shows the synoptic diagram of penetration being changed back the GTG value according to the first embodiment of the present invention.
Figure 13 shows liquid crystal indicator according to the first embodiment of the present invention driving synoptic diagram to light source in a picture frame.
Figure 14 shows liquid crystal indicator according to the second embodiment of the present invention driving synoptic diagram to light source in a picture frame.
Figure 15 shows according to the open-interval synoptic diagram that reduces first and second light source in the driving method of the second embodiment of the present invention.
Figure 16 shows according to disperseing first and second open-interval synoptic diagram in the driving method of the third embodiment of the present invention.
Embodiment
Please refer to Fig. 1, it shows the synoptic diagram according to the liquid crystal indicator of the first embodiment of the present invention.The applied liquid crystal indicator 100 of the driving method of present embodiment can use look order method to form chromatic image, and can need not to use colored filter (Color Filter, CF), reducing the cost of colored filter, and can promote the transmittance of liquid crystal indicator 100.This liquid crystal indicator 100 comprises display panels 110, backlight module 120 and sequential control circuit (Timing Controller, TCON) 130.
Please refer to Fig. 1 and Fig. 2, Fig. 2 shows the synoptic diagram according to the light source of the backlight module of the first embodiment of the present invention.The backlight module 120 of present embodiment is provided with a plurality of different color lights source (not illustrating), in order to different color light to be provided, it can send different coloured light according to the order of filling in colors on a sketch in advance, this order of filling in colors on a sketch in advance for example is R-G-B (R-G-B), R-G-B-Bai (R-G-B-W) or R-G-B-Bai-Huang (R-G-B-W-Y), and wherein yellow (Yellow) can be made up of red and green institute.Backlight module 120 can be side direction incident type (Edge Lighting) backlight module or straight-down negative light inlet (Bottom Lighting) backlight module, and the light source of backlight module 120 can for example be light emitting diode (Light-Emitting Diode, LED) or Organic Light Emitting Diode (Organic Light Emitting Diode, OLED).In the present embodiment, backlight module 120 can comprise the first not homochromy light source 121, secondary light source 122 and the 3rd light source 123.For example, first light source 121 is red (R) light source, and secondary light source 122 is green (G) light source, and the 3rd light source 123 is blue (B) light source, and light source 121,122,123 can be LED.
As shown in Figure 1, the sequential control circuit 130 of present embodiment can be arranged on the circuit board (not illustrating), and be electrically connected at display panels 110 and backlight module 120, for the treatment of an input image data, and according to the image data of handling, and provide image display signal (as the data control signal, the image data signal of handling and gate pole control signal) to the driver (as data driver and gate pole driver) of display panels 110, and provide the light source drive that controls signal to backlight module 120 simultaneously, it is not homochromy backlight to make that backlight module 120 can send in order, comes show image with the driving of 110 pairs of liquid crystal molecules of fluid,matching LCD panel.
Please refer to Fig. 3, it shows the process flow diagram according to the driving method of liquid crystal indicator of the present invention.The driving method of the liquid crystal indicator 100 of present embodiment can comprise following steps: the original luma data (step S101) that receives the input image data; Calculate first opening time and second opening time (step S102) according to original GTG signal, wherein first opening time was first light source 121 in the opening time of picture frame (subframe) in the time for the third time, and second opening time was secondary light source 122 in the opening time of picture frame in the time for the third time; At the first time of picture frame in the time, open first light source 121, at the second time of picture frame in the time, open secondary light source 122 (step S103); Open the 3rd light source 123 at picture frame for the third time in time, and open first light source 121, secondary light source 122 (step S104) according to first opening time, second opening time of calculating simultaneously; After calculating for first opening time, according to first opening time and second opening time of calculating, changing this original luma data is a demonstration luma data (step S105); And at this for the first time picture frame time, picture frame time and this picture frame in the time for the third time for the second time, provide demonstration luma data after the conversion to display panels 110 (step S106), make display panels 110 can cooperate the action of lighting in the different color light source of backlight module 120 to come show image.
Please refer to Fig. 3 and Fig. 4, Fig. 4 shows the method detailed process flow diagram according to the driving method of liquid crystal indicator of the present invention.Wherein, detailed step S2 to S8A and 9A are corresponding to step S102, and detailed step S8B and S9B to S12B are corresponding to step S105.In step S101, the sequential control circuit 130 of liquid crystal indicator 100 can receive original luma data and the original opening time data in the input image data that external system transmits.
Please refer to Fig. 4 and Fig. 5, Fig. 5 shows the synoptic diagram according to original luma data and the original opening time data of the first embodiment of the present invention.In step S101, this original luma data is provided by the input image data.At this moment, utilize an arithmetic element (not illustrating) of sequential control circuit 130, can according to the original luma data of input in the image data calculate each light source in picture frame for the third time opening time and the demonstration GTG value after the compensation.
Please refer to Fig. 4 and Fig. 6, Fig. 6 shows the synoptic diagram according to judgement maximum gray value and the minimum gray value of the first embodiment of the present invention.In step S2, after receiving original luma data, in the raw video GTG value of a picture frame (frame), judge (or detecting) maximum gray value Rmax, Gmax, Bmax and minimum gray value Rmin, Gmin, Bmin of picture frame (sub-frame) each time, to determine to be used for the inferior picture frame time (picture frame time T b for the third time) of colour mixture.As shown in Figure 1, combination of pixels with 2 * 2 is example, maximum gray value Rmax and the minimum gray value Rmin of red time picture frame are respectively 180 and 100, maximum gray value Gmax and the minimum gray value Gmin of green time picture frame are respectively 210 and 90, and maximum gray value Bmax and the minimum gray value Bmin of blue time picture frame are respectively 150 and 80.Wherein, if the GTG value in time picture frame is 0, or can't judge each time picture frame maximum gray value and minimum gray value (equalization) time, then ignores and do not consider.
As shown in Figure 4, in step S3, set the value of color sensitivity weight coefficient (α, beta, gamma).α, β, γ are respectively the weight coefficient of red (R), green (G), blue (B), and it is more than or equal to 0 and smaller or equal to 1, and can carry out the weight adjustment to the susceptibility of each color according to human eye.For example, human eye is the most responsive to green, and then green weight coefficient β can be minimum.In the present embodiment, set weight coefficient α, β respectively, γ is 1.
As shown in Figure 4, in step S4, calculate (β Rmax/Gmin+ γ Rmax/Bmin), (α Gmax/Rmin+ γ Gmax/Bmin) and (α Bmax/Rmin+ β Bmax/Gmin) equivalence respectively, it corresponds respectively to red time picture frame, green time picture frame and blue time picture frame.Illustrate, maximum gray value Rmax, Gmax, Bmax and minimum gray value Rmin, Gmin, Bmin according to above-mentioned each time picture frame, and weight coefficient α, β, γ are respectively 1, then the calculated value of (β Rmax/Gmin+ γ Rmax/Bmin) is 4.25, the calculated value of (α Gmax/Rmin+ γ Gmax/Bmin) is 4.73, and the calculated value of (α Bmax/Rmin+ β Bmax/Gmin) is 3.17.
As shown in Figure 4, in step S5, judge the minimum of computation value among (β Rmax/Gmin+ γ Rmax/Bmin), (the α Gmax/Rmin+ γ Gmax/Bmin) and (α Bmax/Rmin+ β Bmax/Gmin).In the present embodiment, the calculated value minimum of (α Bmax/Rmin+ β Bmax/Gmin), this expression minimum gray value Rmin and Gmin are close to this maximum gray value Bmax, also represent can be in blue-light source (B) open period with red light source (R) and green light source (G) the long time of unlatching, therefore can reach best colour mixture effect.
As shown in Figure 4, in step S6, determine for the first time picture frame, picture frame, the color of picture frame for the third time for the second time.At first, because the calculated value of (β Rmax/Gmin+ γ Rmax/Bmin) and (α Gmax/Rmin+ γ Gmax/Bmin) is bigger two values (first value and second value, perhaps largest value and second largest value), can arbitrarily determine the color of picture frame for the first time and the color of picture frame for the second time, for example: determine that for the first time the picture frame color be redly to be green with picture frame color for the second time.Wherein, so-called random decision means the size order and the sequence independence of the decision picture frame color first time with the picture frame color second time of these two bigger values.Secondly, because the calculated value minimum of (α Bmax/Rmin+ β Bmax/Gmin) can determine that the color of picture frame is blueness for the third time, also can set blue time picture frame for being used for the picture frame for the third time of colour mixture.
In other embodiments, if have a higher value and two minimum value, then this higher value is used as first and is worth to determine the color of picture frame for the first time, arbitrary in two minimum value is used as second and is worth to determine the color of picture frame for the second time, and determines the color of picture frame for the third time according in two minimum value another.
In another other embodiment, if there are three identical values, then can arbitrarily determine the color of picture frame for the first time, color and the color of picture frame for the third time of picture frame for the second time.
So the invention is not restricted to this, the picture frame for the third time that is used for colour mixture be according to the image gray scale value of a picture frame each time the GTG value of picture frame decide.In other embodiments, foundation is the different GTG values of picture frame each time, and this picture frame for the third time that is used for colour mixture also can be red time picture frame or green inferior picture frame.
Please refer to Fig. 4 and Fig. 7, Fig. 7 shows the synoptic diagram that the GTG value is converted to penetration according to the first embodiment of the present invention.In step S7, with the maximum gray value in the picture frame for the third time, the minimum gray value in the picture frame is converted to penetration with minimum gray value in the picture frame for the second time for the first time, for example: the penetration that GTG value Bmax, Rmin, Gmin is converted to light penetration display panels 110, at this moment, can utilize account form or Gamma 2.2 curve lookup table modes to obtain the corresponding penetration of GTG value.For example, GTG value Bmax is 150, and then its corresponding penetration TBmin is 31.12%; GTG value Rmin is 100, and then its corresponding penetration TRmin is 12.75%; GTG value Gmin is 90, and then its corresponding penetration TGmin is 10.11%.
As shown in Figure 4, in step S8A, calculate the opening time ratio of each light source in picture frame for the third time, namely calculate the first opening time ratio and the second opening time ratio.In the present embodiment, the corresponding penetration of GTG value Rmin (12.75%) divided by the corresponding penetration of GTG value Bmax (31.12%), and can be obtained the first opening time ratio (0.41); And the corresponding penetration of GTG value Gmin (10.11%) divided by the corresponding penetration of GTG value Bmax (31.12%), and can be obtained the second opening time ratio (0.32).Wherein, the first opening time ratio and the second opening time ratio are represented first light source 121 and the secondary light source 122 opening time ratio in picture frame time T b for the third time respectively respectively.
As shown in Figure 4, in step S9A, calculate the opening time of each light source in picture frame for the third time, namely calculate first opening time and second opening time.Picture frame time T r takes advantage of in the first opening time ratio for the first time, and picture frame time T g takes advantage of in the second opening time ratio for the second time, then can calculate the first opening time Tbr and the second opening time Tbg.For example, in a picture frame, picture frame time all identical (Tr=Tg=Tb) each time, then the first opening time Tbr of first light source 121 is 0.41 times of picture frame time T b for the third time, and the second opening time Tbg of secondary light source 122 is 0.32 times of picture frame time T b for the third time.
Please refer to Fig. 4 and Fig. 8, Fig. 8 shows the synoptic diagram that is converted to penetration according to other GTG value in the mainly time picture frame of the first embodiment of the present invention.In step S8B, after step S7, can utilize account form or Gamma 2.2 curve lookup table modes that other GTG value that is used for the picture frame for the third time (as blue time picture frame) of colour mixture also is converted to penetration.
Please refer to Fig. 4 and Fig. 9, Fig. 9 shows the synoptic diagram according to other photochromic shared brightness contribution in picture frame for the third time of the calculating of the first embodiment of the present invention.In step S9B, according to the opening time ratio of calculating among the step S8A, calculate first light source 121 and secondary light source 122 in the shared brightness contribution of picture frame in the time for the third time.In the present embodiment, calculating is used herein to the shared brightness contribution of first light source 121 and secondary light source in the inferior picture frame of colour mixture 122, it is that the penetration after the above-mentioned conversion is taken advantage of respectively in the first opening time ratio and the second opening time ratio, and can obtain first light source 121 and secondary light source 122 brightness contribution in picture frame time T b for the third time respectively.For example, the corresponding penetration (31.12%) of the pixel in blue picture frame is taken advantage of in the first opening time ratio (0.41), and can be obtained the brightness contribution (12.75%) that first light source 121 provides for this pixel in picture frame time T b for the third time.In like manner, the corresponding penetration (31.12%) of the same pixel in blue picture frame is taken advantage of in the second opening time ratio (0.32), and can be obtained the brightness contribution (9.96%) that secondary light source 122 provides for this pixel in picture frame time T b for the third time.
Please refer to Fig. 4 and Figure 10, Figure 10 shows the synoptic diagram that the GTG value of other time picture frame is converted to penetration according to the first embodiment of the present invention.In step S10B, can utilize account form or Gamma 2.2 curve lookup table modes that other GTG value in the picture frame first time in the same picture frame in the original luma data, the picture frame second time (as red time picture frame, green time picture frame) also is converted to penetration.
Please refer to Fig. 4 and Figure 11, Figure 11 shows the synoptic diagram according to the penetration of calculating after compensation of the first embodiment of the present invention.In step S11B, calculate the penetration after compensation.At this moment, these corresponding penetrations are provided by above-mentioned first light source 121 and secondary light source 122 brightness contribution that provides in picture frame time T b for the third time, constant to keep the brightness summation of each light source in this picture frame.For example, the brightness contribution (12.75%) that corresponding penetration (12.75%) deduction first light source 121 of the pixel in red picture frame is provided for this pixel in picture frame time T b for the third time, and the penetration that can obtain showing is 0%.In like manner, the brightness contribution (9.96%) that corresponding penetration (65.23%) the deduction secondary light source 122 of the pixel in green picture frame is provided for this pixel in picture frame time T b for the third time, and the penetration that can obtain showing is 55.27%.
Please refer to Fig. 4 and Figure 12, Figure 12 shows the synoptic diagram of penetration being changed back the GTG value according to the first embodiment of the present invention.In step S12B, with the first time picture frame and the penetration after compensation in the picture frame for the second time, be converted to the GTG value after compensation.At this moment, the penetration behind the deduction is changed back the GTG value, and can obtain the demonstration GTG value of each time picture frame, also can obtain showing luma data, the GTG value that wherein is used for the picture frame for the third time (as blue time picture frame) of colour mixture is to remain unchanged.For example, the corresponding penetration (0%) that shows of the pixel of red picture frame change back GTG value (0), i.e. the pixel demonstration GTG value that in the inferior picture frame of redness, should show for this reason.In like manner, the corresponding penetration (55.27%) that shows of the pixel of green picture frame change back GTG value (194), i.e. the pixel demonstration GTG value that in the inferior picture frame of green, should show for this reason.
Please refer to Fig. 4 and Figure 13, Figure 13 shows liquid crystal indicator according to the first embodiment of the present invention driving synoptic diagram to light source in a picture frame.After step S9 and S12B, that is obtaining each light source respectively after the opening time and the demonstration GTG value after the compensation in picture frame for the third time, for example sequential control circuit 130 can provide original opening time data and each light source opening time data in picture frame for the third time to backlight module 120, and the demonstration GTG value after affording redress simultaneously is to display panels 110.Therefore, in step S103, S104 and S106, display panels 110 can show the GTG value after the compensation, and backlight module 120 is to open each light source with the opening time after original opening time and the compensation.At this moment, backlight module 120 can be opened not homochromy light source in regular turn in different inferior picture frames, and opens a plurality of not homochromy light sources simultaneously at the picture frame for the third time that is used for colour mixture.Simultaneously, display panels 110 can according to this show the GTG value cooperate 120 pairs of light sources 121 of backlight module, 122,123 light action, and corresponding display color image.
Therefore, the driving method of the liquid crystal indicator 100 of present embodiment can the GTG value according to the input image decide for the inferior picture frame of mixed light and the opening time that is used herein to inferior each light source of picture frame of mixed light in each picture frame, and simultaneously corresponding to the corresponding GTG value of adjusting former input image of the opening time of light source, make display panels 110 can cooperate the GTG value that image is adjusted in action of lighting of backlight module 120, keeping the shown image brilliance unanimity of liquid crystal indicator 100, and can improve look segregation phenomenon (CBU) simultaneously.Moreover, the driving method of the liquid crystal indicator 100 of present embodiment can not need increase slightly outer hardware and needn't sacrifice the color saturation of image, reaching the effect of improving the look segregation phenomenon, thereby can guarantee cost of products and the display quality of liquid crystal indicator simultaneously.
Please refer to Figure 14 and Figure 15, Figure 14 shows the method detailed process flow diagram according to the difference driving method of the liquid crystal indicator of the second embodiment of the present invention, and Figure 15 shows according to the open-interval synoptic diagram that reduces first and second light source in the driving method of the second embodiment of the present invention.Below only describe with regard to the different place between present embodiment and first embodiment, its resemblance does not then repeat them here.Compared to first embodiment, the driving method of the liquid crystal indicator of second embodiment can further be adjusted the GTG value of show image in each picture frame, reducing first light source 121 and secondary light source 122 opening time in its corresponding picture frame (picture frame and picture frame for the first time for the second time), and reduce the light source power consumption of backlight module.Before the penetration behind the deduction of other time picture frame beyond the main inferior picture frame is changed back the GTG value (before S12B), in step S21, with the first time picture frame be adjusted into maximum critical penetration degree (100%) with maximum penetration degree in the penetration of picture frame after compensation for the second time, and picture frame is adjusted with other penetration equal proportion ground in the penetration of picture frame after compensation for the second time for the first time.For example, maximum penetration degree (43.27%) behind the deduction in the red time picture frame is adjusted into maximum critical penetration degree (100%), at this moment, need the maximum penetration degree (43.27%) in the penetration of the picture frame first time after compensation is taken advantage of in the penetration ratio (2.31) of the picture frame first time, to obtain 100%.Simultaneously, other penetration in the red time picture frame is adjusted according to equal proportion (2.31).Again for example, the maximum penetration degree (43.27%) behind the deduction in the red time picture frame is adjusted into maximum critical penetration degree (100%), at this moment, need are taken advantage of in 2.31 43.27%, to obtain 100%.Simultaneously, other penetration equal proportion in the red time picture frame is adjusted (2.31).In like manner, green time picture frame is also handled in an identical manner.
Then, in step S22, again the penetration after adjusting in the inferior picture frame change back the GTG value, the maximum gray value in the feasible inferior picture frame can tune to critical GTG value (for example 255).Then, in step S23, shorten the opening time of first and second light source 121 and 122 in its corresponding time picture frame, i.e. picture frame time and picture frame time for the first time for the second time according to identical ratio.For example, the penetration after adjusting in red the picture frame is changed back the GTG value, show to provide to display panels 110.Then, opening time (that is former picture frame time first time) Tr in red time picture frame removes in 2.31 with first light source 121, obtaining demonstration opening time (that is the new first time picture frame time) Tr/2.31 of first light source 121 in first time picture frame, thereby shorten the opening time of first light source 121.Again for example, the penetration after adjusting in green the picture frame is changed back the GTG value, show to provide to display panels 110.Then, opening time (that is former picture frame time second time) Tg in green time picture frame removes in 1.81 with secondary light source 122, obtaining demonstration opening time (that is the new second time picture frame time) Tg/1.81 of secondary light source 122 in second time picture frame, thereby shorten the opening time of secondary light source 122.
Please refer to Figure 16, it shows according to disperseing first and second open-interval synoptic diagram in the driving method of the third embodiment of the present invention.Below only describe with regard to the different place between present embodiment and first embodiment, its resemblance does not then repeat them here.Compared to first embodiment, the driving method of the liquid crystal indicator of the 3rd embodiment can be further be scattered in the first opening time Tbr of first and second light source 121 and 122 and the second opening time Tbg respectively for the third time in the picture frame time T b equably (at this for the third time in the picture frame time T b, disperse to open this first light source and secondary light source equably with predeterminated frequency), to slow down look segregation phenomenon (CBU), that is in picture frame time T b for the third time, the first opening time Tbr and the second opening time Tbg are split into a plurality of of short duration opening times, and have identical or different interval between those of short duration opening times.For example, in picture frame time T b for the third time, be a plurality of pulses (plus) signals with the light source drive waveforms signal transition of the first and the 3rd light source 121 and 123, perhaps, will be in picture frame time T b for the third time, be a plurality of short wavelength's signals with the light source drive waveforms signal transition of the first and the 3rd light source 121 and 123, it is scattered in for the third time in the picture frame time T b, with the further look segregation phenomenon of improving.
By the embodiment of the invention described above as can be known, the driving method of liquid crystal indicator of the present invention can be adjusted GTG value and the opening time of each light source in mixed light time picture frame of show image according to the GTG value of input image in each picture frame, to improve look segregation phenomenon (CBU).Moreover the driving method of liquid crystal indicator of the present invention can not need increase slightly outer hardware and needn't sacrifice the color saturation of image, reaching the effect of improving the look segregation phenomenon, thereby can guarantee cost of products and the display quality of liquid crystal indicator simultaneously.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, be to instruct relevant hardware to finish by computer program, the program of carrying out method of the present invention can be stored in the computer readable storage medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, above-mentioned storage medium can be disk, CD, read-only stored memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc.
In sum; though the present invention discloses as above with preferred embodiment; but above preferred embodiment is not in order to limit the present invention; those of ordinary skill in the art; without departing from the spirit and scope of the present invention; all can do various changes and retouching, so protection scope of the present invention is as the criterion with the scope that claim defines.
Claims (20)
1. the driving method of a liquid crystal indicator, it is characterized in that: described driving method comprises the steps:
A. receive the original luma data of input image data;
B. calculate first opening time and second opening time according to original GTG signal;
C. according to described first opening time and described second opening time, change described original luma data for showing luma data;
D. at described first time of picture frame in the time, open first light source, and at described second time of picture frame in the time, open secondary light source;
E. open the 3rd light source at picture frame for the third time in the time, and open described first light source and described secondary light source according to described first opening time, described second opening time simultaneously; And
F. in the described picture frame time first time, the described picture frame time second time and the described time of picture frame for the third time, provide described demonstration luma data after the conversion to display panels.
2. driving method according to claim 1, it is characterized in that: described step B comprises the steps:
Judge maximum gray value (Rmax, Gmax, Bmax) and minimum gray value (Rmin, Gmin, Bmin) in the described original luma data.
3. driving method according to claim 2, it is characterized in that: described step B also comprises the steps:
Set the value of color sensitivity weight coefficient (α, β, γ).
4. driving method according to claim 3, it is characterized in that: described step B also comprises the steps:
Calculate the value of following equation:
(β Rmax/Gmin+ γ Rmax/Bmin) is corresponding to red time picture frame;
(α Gmax/Rmin+ γ Gmax/Bmin) is corresponding to green time picture frame; And
(α Bmax/Rmin+ β Bmax/Gmin) is corresponding to blue time picture frame.
5. driving method according to claim 4, it is characterized in that: described step B also comprises the steps:
Judge first value in the described equation, second value and minimum value.
6. driving method according to claim 5, it is characterized in that: described step B also comprises the steps:
According to described equational described first value and described second value, determine described first time of picture frame color and described second time picture frame color; And
According to described equational described minimum value, determine the color of described picture frame for the third time.
7. driving method according to claim 6, it is characterized in that: described step B also comprises the steps:
With in the described picture frame for the third time maximum gray value, described first time in the picture frame the minimum gray value and the described minimum gray value in the described second time picture frame be converted to penetration.
8. driving method according to claim 7, it is characterized in that: described step B also comprises the steps:
With the described minimum gray value in the described first time picture frame divided by the described maximum gray value in the described picture frame for the third time, to calculate the first opening time ratio; And
With the described minimum gray value in the described second time picture frame divided by the described maximum gray value in the described picture frame for the third time, to calculate the second opening time ratio.
9. driving method according to claim 8, it is characterized in that: described step B also comprises the steps:
The described picture frame time first time is taken advantage of in the described first opening time ratio, to calculate described first opening time; And
The picture frame time takes advantage of in the described second opening time ratio for the second time, to calculate described second opening time.
10. driving method according to claim 8, it is characterized in that: described step C comprises the steps:
Other GTG value in the described picture frame for the third time is converted to penetration; And
Penetration with after described other GTG value conversion multiply by the described first opening time ratio and the described second opening time ratio, to calculate described first light source and described secondary light source shared brightness contribution in the described time of picture frame for the third time.
11. driving method according to claim 10 is characterized in that: described step C also comprises the steps:
Other GTG value in described first time picture frame and the described second time picture frame is converted to penetration.
12. driving method according to claim 11 is characterized in that: described step C also comprises the steps:
With described first time picture frame and described second time picture frame corresponding penetration, deduct described first light source and described secondary light source shared brightness contribution in the described time of picture frame for the third time, to calculate described first time of picture frame and the penetration of the described picture frame second time after compensation.
13. driving method according to claim 12 is characterized in that: described step C also comprises the steps:
With the penetration after compensation in described first time picture frame and the described second time picture frame, be converted to the GTG value after compensation.
14. driving method according to claim 12 is characterized in that: also comprise the steps:
With the maximum penetration degree in described first time picture frame and the penetration of the described picture frame second time after compensation, multiply by respectively described first time picture frame and described second time picture frame the penetration ratio, be adjusted into maximum critical penetration degree; And
Other penetration in described first time picture frame and the penetration of the described picture frame second time after compensation is adjusted according to equal proportion ground.
15. driving method according to claim 14 is characterized in that: also comprise the steps:
With described first time picture frame and the penetration of the described picture frame second time after adjusting, be converted to the GTG value after compensation.
16. driving method according to claim 15 is characterized in that: also comprise the steps:
With the described picture frame time first time and the described picture frame time second time divided by described first time picture frame and described second time picture frame described penetration ratio, to shorten the described picture frame time first time and the described picture frame time second time.
17. driving method according to claim 16 is characterized in that: also comprise the steps:
With the described picture frame time first time and the described picture frame time second time, be scattered in equably respectively in the described time of picture frame for the third time.
18. the driving method of a liquid crystal indicator is characterized in that: described driving method comprises the steps:
At the first time of picture frame in the time, open first light source, and the luma data that picture frame for the first time is provided is to display panels;
At the second time of picture frame in the time, open secondary light source, and the luma data that picture frame for the second time is provided is to described display panels; And
Open described first light source, described secondary light source and the 3rd light source at picture frame for the third time in time, and the luma data that picture frame for the third time is provided is to described display panels.
19. driving method according to claim 18 is characterized in that: also comprise the steps:
Shorten the described picture frame time first time and the described picture frame time second time.
20. driving method according to claim 19 is characterized in that: also comprise the steps:
In the described time of picture frame for the third time, disperse to open described first light source and described secondary light source equably.
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| CN105374309A (en) * | 2014-08-20 | 2016-03-02 | 三星显示有限公司 | Method of driving display panel and display apparatus for performing the same |
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