CN101702304A - Device for converting three-color grayscale value into four-color grayscale value and method thereof - Google Patents
Device for converting three-color grayscale value into four-color grayscale value and method thereof Download PDFInfo
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Abstract
The invention provides a device for converting three-color grayscale value into four-color grayscale value and a method thereof. The method comprises: obtaining the first color grayscale value, the second color grayscale value and the third color grayscale value of a picture element; calculating the grayscale difference between each two of the three color grayscale values to obtain the grayscale differences from the first to the third; if all the grayscale differences are smaller than a threshold, generating color grayscale conversion values from the first to the fourth, wherein the fourth color grayscale conversion value is larger than zero; otherwise, the fourth color grayscale conversion is equal to zero, and the color grayscale conversion values from the first to the third are equal to the grayscale values from the first to the third respectively. The invention also provides a liquid crystal display using the device for converting three-color grayscale value into four-color grayscale value, and a driving method for the liquid crystal display using the device for converting three-color grayscale value into four-color grayscale value. The invention has the advantages of reducing color separation occasion, and maintaining color saturation level.
Description
[technical field]
The invention relates to a kind of color gray values switch technology of color sequential display, and particularly relevant for a kind of technology of converting three-color grayscale value into four-color grayscale value.
[background technology]
In traditional LCD, the light source design of its backlight module is generally a white light source, for example is cold-cathode tube.This white light source can see through colored filter (ColorFilter) and form the required backlight of each picture element.From a picture element array, redness (R), green (G) and blue (B) three colored filters can be set on the picture element position, this method expends cost.In addition, because LCD is to adopt the framework of colored filter, so white light source can be subjected to the obstruct of colored filter, and the brightness of LCD is reduced.
In view of this, prior art develops the color sequential display that with look preface method (Color Sequential Method) collocation control circuit.This color sequential display is to utilize versicolor light emitting diode (Light-Emitting Diodes LED) replaces the backlight of conventional white light, alternately lights light source wherein of the same colour to show the color of each picture element on sequential.The available liquid crystal display is to utilize colored filter colour mixture spatially, and color sequential display is then via different colored light sources colour mixture in time.Its principle is in the time range that human eye vision persists, and switches fast on time shaft with blue (B) three kinds of color images, thereby produces the colour mixture effect with red (R), green (G).
Color sequential display does not need to be provided with colored filter, so light source can not intercepted, so can promote picture brightness.In addition, color sequential display is to adopt the light source of light emitting diode as display, and therefore the color display technique of collocation look preface method can make the specification of color sequential display become compact, obtains big spatial resolution (spatial resolution) with low cost.Though color sequential display has advantages such as high resolving power, high brightness, high chroma and volume are little, it also derives other shortcomings, for example color-separated (color break-up, CBU) situation.
Color-separated be a kind of because human eye jump the instinct of looking or following the trail of object in the picture at random, make that object causes the phenomenon of object edge generation color-separated visually because the colour field of each color does not fall within the retina same point in the picture.Fig. 1 illustrates the synoptic diagram that produces into color-separated.With reference to Fig. 1, a full-color picture can be divided into the subframe of redness (R), green (G) and blue (B).By showing red (R), green (G) and blue (B) subframe fast in regular turn, finish the demonstration of a full-color picture.Is example at this with display white (W) image.When requiring to manifest white image, the white image of seeing from mobile observation point 100, its left side edge is respectively the color scheme that blue (B) and blueness add green (B+G), its right side edge then is respectively the color scheme that red (R) and redness add green (R+G), is not the white (W) that manifest.
[summary of the invention]
One of technical matters to be solved by this invention is to provide a kind of method of converting three-color grayscale value into four-color grayscale value, can reduce look and separate situation, also can keep color saturation.
Two of technical matters to be solved by this invention is to provide a kind of device of converting three-color grayscale value into four-color grayscale value, can reduce look and separate situation, also can keep color saturation.
Three of technical matters to be solved by this invention is to provide a kind of driving method of LCD, and the look that can reduce LCD separates situation, also can keep color saturation.
Four of technical matters to be solved by this invention is to provide a kind of look that reduces LCD to separate situation, also can keep the LCD of color saturation.
The present invention one of solves the problems of the technologies described above by following technological means: a kind of method of converting three-color grayscale value into four-color grayscale value comprises first color gray values, second color gray values and the 3rd color gray values that obtain picture element.In addition, calculate the second GTG difference between the first GTG difference, second color gray values and the 3rd color gray values between first color gray values and second color gray values and the 3rd GTG difference between the 3rd color gray values and first color gray values.When the first GTG difference, the second GTG difference and the 3rd GTG difference during all less than threshold values, can produce the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value according to first color gray values, second color gray values and the 3rd color gray values, this moment, the 4th color GTG conversion value was greater than zero.When the one of the first GTG difference, the second GTG difference and the 3rd GTG difference during greater than threshold values, can produce the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value, this moment, the 4th color GTG conversion value was zero, and the first color GTG conversion value, the second color GTG conversion value and the 3rd color GTG conversion value equal first color gray values, second color gray values and the 3rd color gray values respectively.
In one embodiment of this invention, when the first GTG difference, the second GTG difference and the 3rd GTG difference are during all less than threshold values, according to first color gray values, second color gray values and the 3rd color gray values produce the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value, this moment, the 4th color GTG conversion value equaled first color gray values, the middle reckling of second color gray values and the 3rd color gray values, the first color GTG conversion value equals first color gray values and deducts the 4th color GTG conversion value, the second color GTG conversion value equals second color gray values and deducts the 4th color GTG conversion value, and the 3rd color GTG conversion value equals the 3rd color gray values and deducts the 4th color GTG conversion value.
First color gray values, second color gray values and the 3rd color gray values are respectively red GTG value, green GTG value and blue GTG value in one embodiment of this invention, and the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value are respectively red GTG value, green GTG value, blue GTG value and white GTG value.In another embodiment, the first GTG difference, the second GTG difference and the 3rd GTG difference are positive integer.
The present invention by following technological means solve the problems of the technologies described above two: a kind of device of converting three-color grayscale value into four-color grayscale value, it comprises input block, first subtrator, second subtrator, the 3rd subtrator, judgement unit and converting unit.Input block can be obtained first color gray values, second color gray values and the 3rd color gray values of picture element.First subtrator couples input block, can calculate the first GTG difference between first color gray values and second color gray values.Second subtrator couples input block, can calculate the second GTG difference between second color gray values and the 3rd color gray values.The 3rd subtrator couples input block, can calculate the 3rd GTG difference between the 3rd color gray values and first color gray values.Judgement unit couples first subtrator, second subtrator and the 3rd subtrator, whether can differentiate the first GTG difference, the second GTG difference and the 3rd GTG difference all less than threshold values, and produces the differentiation result according to this.Converting unit couples input block and judgement unit.Be designated as when being when differentiating the result, converting unit can produce the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value according to first color gray values, second color gray values and the 3rd color gray values, and this moment, the 4th color GTG conversion value was greater than zero.When the differentiation result is designated as not, converting unit can produce the first color GTG conversion value, the second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value, this moment, the 4th color GTG conversion value was zero, and the first color GTG conversion value, the second color GTG conversion value and the 3rd color GTG conversion value equal first color gray values, second color gray values and the 3rd color gray values respectively.
The present invention by following technological means solve the problems of the technologies described above three: a kind of driving method of LCD, LCD comprise panel module and backlight module.Backlight module comprises red backlight, green colored backlights source, blue backlight and white backlight source.Driving method comprises the red GTG value that obtains picture element, green GTG value and blue GTG value.Calculate the second GTG difference between the first GTG difference between red GTG value and the green GTG value, green GTG value and the blue GTG value and the 3rd GTG difference between blue GTG value and the red GTG value.When the first GTG difference, the second GTG difference and the 3rd GTG difference during all less than threshold values, produce red GTG conversion value, green GTG conversion value, blue GTG conversion value and white GTG conversion value according to red GTG value, green GTG value and blue GTG value, this moment, white GTG conversion value was greater than zero.When the one of the first GTG difference, the second GTG difference and the 3rd GTG difference during greater than threshold values, produce red GTG conversion value, green GTG conversion value, blue GTG conversion value and white GTG conversion value, this moment, white GTG conversion value was zero, and red GTG conversion value, green GTG conversion value and blue GTG conversion value equal red GTG value, green GTG value and blue GTG value respectively.Panel module can and cooperate red backlight that red backlight sends according to red GTG conversion value, to show the red sprite of picture frame.Panel module can be according to green GTG conversion value and the green colored backlights that cooperates the green colored backlights source to be sent, to show the green sprite of picture frame.Panel module can and cooperate blue backlight that blue backlight sends according to blue GTG conversion value, to show the blue sprite of picture frame.Panel module can be according to white GTG conversion value and the white backlight that cooperates the white backlight source to be sent, to show the white sprite of picture frame.
The present invention by following technological means solve the problems of the technologies described above four: a kind of LCD comprises data processing module, panel module and backlight module.Data processing module comprises input block, first subtrator, second subtrator, the 3rd subtrator, judgement unit and converting unit.Input block can be obtained the red GTG value of picture element, green GTG value and blue GTG value.First subtrator couples input block, can calculate the first GTG difference between red GTG value and the green GTG value.Second subtrator couples input block, can calculate the second GTG difference between green GTG value and the blue GTG value.The 3rd subtrator couples input block, can calculate the 3rd GTG difference between blue GTG value and the red GTG value.Judgement unit couples first subtrator, second subtrator and the 3rd subtrator, whether can differentiate the first GTG difference, the second GTG difference and the 3rd GTG difference all less than threshold values, and produces the differentiation result according to this.Converting unit couples input block and judgement unit.Be designated as when being when differentiating the result, converting unit can produce red GTG conversion value, green GTG conversion value, blue GTG conversion value and white GTG conversion value according to red GTG value, green GTG value and blue GTG value, and this moment, white GTG conversion value was greater than zero.When the differentiation result is designated as not, converting unit can produce red GTG conversion value, green GTG conversion value, blue GTG conversion value and white GTG conversion value, this moment, white GTG conversion value was zero, and red GTG conversion value, green GTG conversion value and blue GTG conversion value equal red GTG value, green GTG value and blue GTG value respectively.Panel module couples data processing module, the red sprite that can show picture frame according to red GTG conversion value, the green sprite that shows picture frame according to green GTG conversion value, show the blue sprite of picture frame according to blue GTG conversion value, and show the white sprite of picture frame according to white GTG conversion value.Backlight module is disposed at the following of panel module, comprises red backlight, green colored backlights source, blue backlight and white backlight source.But the action of red backlight mating surface plate module in time produces red backlight, thereby makes panel module show red sprite.But the action of green colored backlights source mating surface plate module in time produces green colored backlights, thereby makes panel module show green sprite.But the action of blue backlight mating surface plate module in time produces blue backlight, thereby makes panel module show blue sprite.But the action of white backlight source mating surface plate module in time produces white backlight, thereby makes panel module display white sprite.
The invention has the advantages that: by obtaining first to the 3rd color gray values of picture element.In addition, calculate first to the 3rd color gray values GTG difference between any two, to obtain first to the 3rd GTG difference.If first to the 3rd GTG difference during all less than threshold values, can produce first to fourth color GTG conversion value according to first to the 3rd color gray values, this moment, the 4th color GTG conversion value was greater than zero; If not, the 4th color GTG conversion value then is zero, and first to the 3rd color GTG conversion value equals first to the 3rd color gray values respectively.Thus, not only can reduce look and separate situation, also can keep color saturation.Embodiments of the invention also can change the power consumption that suppresses the look segregation phenomenon, reduce display, keep color saturation by the height of adjusting threshold values in addition ... etc. effect.Threshold values is littler, and the effect of keeping color saturation better; Otherwise threshold values is bigger, and suppressing the look segregation phenomenon can be better with the effect of the power consumption that reduces display.
[description of drawings]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 illustrates the synoptic diagram that produces into color-separated.
Fig. 2 is the calcspar according to the device of a kind of converting three-color grayscale value into four-color grayscale value of one embodiment of the invention.
Fig. 3 is the process flow diagram according to the method for a kind of converting three-color grayscale value into four-color grayscale value of one embodiment of the invention.
Fig. 4 is the synoptic diagram according to a kind of three look image datas of one embodiment of the invention.
Fig. 5 is the synoptic diagram according to a kind of four look image datas of one embodiment of the invention.
Fig. 6 is the sequential chart according to the controlling signal of a kind of each color liquid crystal cells of one embodiment of the invention and each color controlling signal backlight.
[embodiment]
The situation that serious color-separated is arranged.In view of this, embodiments of the invention provide a kind of three look image datas have been converted to the technology of four look image datas, applicable to four look color sequential displays.At first can receive three look image datas, and calculate the red GTG value of each picture element, green GTG value and blue GTG value GTG difference between any two, to obtain first to the 3rd GTG difference.Whether then can differentiate first to the 3rd GTG difference all less than threshold values.If first to the 3rd GTG difference is all less than threshold values, represent the color of this corresponding picture element similar to white, can produce adjusted red GTG value, green GTG value, blue GTG value and white GTG value according to red GTG value, green GTG value and blue GTG value, this moment, white GTG value was greater than zero.That is to say, utilize white GTG value to replace the colour mixture effect of the red GTG value of part, green GTG value, blue GTG value, therefore can suppress the situation that look separates.
On the other hand, if the one of first to the 3rd GTG difference, is represented the color and the white difference that certain degree is arranged of this corresponding picture element greater than threshold values, can not adjust red GTG value, green GTG value and blue GTG value.That is to say, adjusted red GTG value, green GTG value, blue GTG value can be respectively with adjust before red GTG value, green GTG value, blue GTG value identical, and white GTG value can equal zero at this moment.Can keep color saturation thus.Below cooperate graphic being described more specifically.
Fig. 2 is the calcspar according to the device of a kind of converting three-color grayscale value into four-color grayscale value of one embodiment of the invention.Please refer to Fig. 2, the device 10 of converting three-color grayscale value into four-color grayscale value can comprise input block 20, subtrator 31～33, judgement unit 40 and converting unit 50.Input block 20 couples subtrator 31～33 and converting unit 50.Judgement unit 40 is coupled between subtrator 31～33 and the converting unit 50.
Accept above-mentionedly, judgement unit 40 can receive GTG difference DV1～DV3, and whether differentiates GTG difference DV1～DV3 all less than threshold values, and output is according to this differentiated as a result RS to converting unit 50.Converting unit 50 can RS selects transfer algorithm according to differentiating as a result, thereby thereby converts red GTG value R, green GTG value G and blue GTG value B to red GTG conversion value R ', green GTG conversion value G ', blue GTG conversion value B ' and white GTG conversion value W '.Below cooperate process flow diagram to describe.
Fig. 3 is the process flow diagram according to the method for a kind of converting three-color grayscale value into four-color grayscale value of one embodiment of the invention.Fig. 4 is the synoptic diagram according to a kind of three look image datas of one embodiment of the invention.Fig. 5 is the synoptic diagram according to a kind of four look image datas of one embodiment of the invention.Please merge with reference to Fig. 2～Fig. 5, in the present embodiment, three look image datas and four look image datas are that example describes with picture element P1～P9 only, but the present invention is not limited to this.In other embodiments, three look image datas and four look image datas can be the images of other resolution.How following explanation earlier is converted to four look GTGs with the three look GTGs of picture element P1.
At first can be by step S301, input block 20 receives red GTG value R, green GTG value G and the blue GTG value B of picture element P1.Can know that by Fig. 4 the red GTG value R that learns picture element P1 is 10, green GTG value G is 15, and blue GTG value is 8.
Then can calculate red GTG value R, green GTG value G and the blue GTG value B GTG difference between any two of picture element P1 by step S302.Say that further subtrator 31 can calculate the GTG difference between red GTG value R and the green GTG value G, thereby thereby obtaining GTG difference DV1 is 5.Subtrator 32 can calculate the GTG difference between green GTG value G and the blue GTG value B, is 7 thereby obtain GTG difference DV2.Subtrator 33 can calculate the GTG difference between blue GTG value B and the red GTG value R, is 2 thereby obtain GTG difference DV3.
Then can whether differentiate GTG difference DV1～DV3 all less than threshold values by step S303.If GTG difference DV1～DV3 is all less than threshold values, 50 modes according to step S304 of converting unit produce four look GTG conversion values.If the one of GTG difference DV1～DV3 is greater than threshold values, 50 modes according to step S305 of converting unit produce four look GTG conversion values.Whether usefulness that it should be noted that step S303 is intended to differentiate the color of corresponding picture element similar in appearance to white.If GTG difference DV1～DV3 is all very little, the color similarity of representing corresponding picture element is in white, even if therefore also can not cause too big aberration with the white colour mixture effect that replaces redness, green and blueness.There is one very big as if GTG difference DV1～DV3, represents the color and the white dissmilarity of corresponding picture element, therefore may cause very big aberration, and may influence color saturation with the white colour mixture effect that replaces redness, green and blueness.
Step S303 in the present embodiment, judgement unit 40 can receive GTG difference DV1～DV3 that subtrator 31～33 is exported respectively, and respectively GTG difference and threshold values are compared, thereby whether differentiate GTG difference DV1～DV3 all less than threshold values, and RS is as a result differentiated in output according to this.At this, threshold values is that example describes with 10, but the present invention has the knack of art technology person and can decide threshold values according to its demand not as limit.Because threshold values is 10, GTG difference DV1～DV3 is respectively 5,7,2, therefore differentiates as a result that RS can show GTG difference DV1～DV3 all less than threshold values, but subsequent steps S304.
In step S304, can produce red GTG conversion value R ', green GTG conversion value G ', blue GTG conversion value B ' and white GTG conversion value W ' according to the red GTG value R of picture element P1, green GTG value G and blue GTG value B.Provide a kind of embodiment of step S304 to supply those of ordinary skill in the art's reference at this.
At first, can more red GTG value R, green GTG value G and the size of blue GTG value B, thus filter out reckling among red GTG value R, green GTG value G and the blue GTG value B three.Apparently, the blue GTG value of picture element P1 is 8, is reckling among the above-mentioned three.Then, can produce white GTG conversion value W ', make its value be same as reckling among the above-mentioned three, also be that the white GTG conversion value W ' of picture element P1 is 8.Then, can produce red GTG conversion value R ', make its value be same as red GTG value R and deduct white GTG conversion value W ', also be that the red GTG conversion value R ' of picture element P1 is 2.Then, can produce green GTG conversion value G ', make its value be same as green GTG value G and deduct white GTG conversion value W ', also be that the green GTG conversion value G ' of picture element P1 is 7.Then, can produce blue GTG conversion value B ', make its value be same as blue GTG value B and deduct white GTG conversion value W ', also be that the blue GTG conversion value B ' of picture element P1 is 0.
On the other hand, in step S303, if the one of GTG difference DV1～DV3 is greater than threshold values, 50 modes according to step S305 of converting unit produce four look GTG conversion values.Is that example describes at this with picture element P2.In the present embodiment, GTG difference DV1～DV3 of picture element P2 is respectively 10,55 and 45, therefore can subsequent steps S305 behind step S303.In step S305, converting unit 50 can produce red GTG conversion value R ', green GTG conversion value G ', blue GTG conversion value B ' and white GTG conversion value W ', and it equals red GTG value R, green GTG value G, blue GTG value B and zero respectively.More particularly, the red GTG conversion value R ' of picture element P2, green GTG conversion value G ', blue GTG conversion value B ' are respectively 120,130,75 and 0 with white GTG conversion value W '.
In like manner but repeating step S301～S305 converts the three-color GTG value of other picture elements to four look color gray values.In the present embodiment, the four look color gray values of picture element P1, P4, P5, P7 and P8 are to change according to the mode of step S304, can effectively suppress the look segregation phenomenon.It will be further appreciated that four look color sequential displays are to utilize red backlight, green colored backlights source, blue backlight and white backlight source to show four look color gray values.Because the luminescence efficiency in white backlight source is better than the mixed light effect of red backlight, green colored backlights source and blue backlight.Therefore utilize white GTG conversion value W ' to replace the mixed light effect of the red GTG value of part R, green GTG value G, blue GTG value B, can effectively reduce the power consumption of four look color sequential displays.
In addition, in the present embodiment, the four look color gray values of picture element P2, P3, P6 and P9 are to change according to the mode of step S305, can keep the saturation degree of color.
What deserves to be mentioned is, in the present embodiment, the height of threshold values directly influence suppress the look segregation phenomenon, reduce display power consumption, keep color saturation ... etc. effect.More particularly, threshold values is littler, and the effect of keeping color saturation better; Otherwise threshold values is bigger, and suppressing the look segregation phenomenon can be better with the effect of the power consumption that reduces display.The sequential chart that the controlling signal of each color liquid crystal cells and each color controlling signal backlight below is provided is for those of ordinary skill in the art's reference.
Fig. 6 is the sequential chart according to the controlling signal of a kind of each color liquid crystal cells of one embodiment of the invention and each color controlling signal backlight.Please refer to Fig. 6, Vsync is a vertical synchronizing signal.LC-R is the controlling signal of red liquid crystal unit.R-BL is red controlling signal backlight.T1 is between the reaction period of red liquid crystal unit.LC-G is the controlling signal of green liquid crystal unit.G-BL is the controlling signal of green colored backlights.T2 is between the reaction period of green liquid crystal unit.LC-B is the controlling signal of blue liquid crystal unit.B-BL is blue controlling signal backlight.T3 is between the reaction period of blue liquid crystal unit.LC-W is the controlling signal of white liquid crystal cells.W-BL is the controlling signal of white backlight.T4 is between the reaction period of white liquid crystal cells.
Though the devices and methods therefor of converting three-color grayscale value into four-color grayscale value has been depicted a possible kenel in the foregoing description, usually know that the knowledgeable should know but have in the affiliated technical field, each manufacturer is all different for the design of the devices and methods therefor of converting three-color grayscale value into four-color grayscale value, and therefore application of the present invention is when being not restricted to the possible kenel of this kind.In other words, so long as select the algorithm of converting three-color grayscale value into four-color grayscale value, be to have met spiritual place of the present invention just according to the degree of the color broken white of picture element.Below lift several embodiments again and know that usually the knowledgeable can further understand spirit of the present invention, and implement the present invention so that this area has.
In the foregoing description, though threshold values is that example describes with 10, it only is a kind of selection embodiment.In other embodiments, threshold values also can be 5～15.
In the foregoing description, the embodiment that step S304 adopted only is a kind of selection embodiment, and the present invention is not as limit.Those of ordinary skill in the art also can need change the embodiment of step S304 according to it.Below cooperating Fig. 4 to give some instances describes again.
In first example, at first, can compare the size of the red GTG value R of picture element P1, green GTG value G and blue GTG value B, thereby filter out reckling among red GTG value R, green GTG value G and the blue GTG value B three.Apparently, the blue GTG value of picture element P1 is 8, is reckling among the above-mentioned three.Then, can produce white GTG conversion value W ', make its value be same as that reckling is multiplied by ratio value round numbers part again among the above-mentioned three.In this example, the aforementioned proportion value describes with 1/2, also can be other values in other embodiments.
So can obtain white GTG conversion value W ' is 4.Then, can produce red GTG conversion value R ', make its value be same as red GTG value R and deduct white GTG conversion value W ', also be that the red GTG conversion value R ' of picture element P1 is 6.Then, can produce green GTG conversion value G ', make its value be same as green GTG value G and deduct white GTG conversion value W ', also be that the green GTG conversion value G ' of picture element P1 is 11.Then, can produce blue GTG conversion value B ', make its value be same as blue GTG value B and deduct white GTG conversion value W ', also be that the blue GTG conversion value B ' of picture element P1 is 4.
In second example, the X unit of the red GTG value of fechtable R, Y unit and the Z unit of blue GTG value B of green GTG value G produce the unit of white GTG conversion value W ', wherein X, Y and Z can be have decimal on the occasion of.X, Y and Z are that example describes with 2,1,2 respectively in this example, but are not limited thereto.Can obtain the red GTG conversion value R ' of picture element P1, green GTG conversion value G ', blue GTG conversion value B ' and white GTG conversion value W ' according to the red GTG value R of picture element P1, green GTG value G and blue GTG value B thus and be respectively 2,11,0 and 4.
What deserves to be mentioned is that the technology that above-mentioned all embodiment provided can be applicable to the LCD of look preface method.This LCD can comprise data processing module, panel module and backlight module.Data processing module can comprise the device of above-mentioned converting three-color grayscale value into four-color grayscale value.Describe in detail and can not repeat them here with reference to the foregoing description.Backlight module is configurable under panel module, can comprise red backlight, green colored backlights source, blue backlight and white backlight source.Red backlight for example is the back light source in LED that can independently send red light.The green colored backlights source for example is the back light source in LED that can independently send green light.Blue backlight for example is the back light source in LED that can independently send blue light.The white backlight source for example is the back light source in LED that can independently send white light.But the action of red backlight mating surface plate module in time produces red backlight.But the action of green colored backlights source mating surface plate module in time produces green colored backlights.But the action of blue backlight mating surface plate module in time produces blue backlight.But the action of white backlight source mating surface plate module in time produces white backlight.
Hold above-mentionedly, panel module couples data processing module, can show the red sprite of picture frame according to red GTG conversion value.Panel module can show the green sprite of picture frame according to green GTG conversion value.In addition, panel module also can show the blue sprite of picture frame according to blue GTG conversion value.Moreover panel module more can show the white sprite of picture frame according to white GTG conversion value.LCD shows red sprite, green sprite, blue sprite, white sprite by quick and alternately, can make the effect of people's vision generation colour mixture.
Because present embodiment has adopted the preferable white backlight source of luminescence efficiency to replace red, green and blue white mixed light effect backlight, therefore not only can reduce power consumption, also can reduce the look segregation phenomenon.
In the present embodiment, though the backlight liquid crystal display module formed by four kinds of back light source in LED that can independently send red light, green light, blue light and white light respectively.But in other embodiments, the backlight of backlight module also can be made up of back light source in LED that can send red light, green light and blue light and the back light source in LED that can send white light.In another embodiment, the backlight of backlight module also can be made up of the back light source in LED that can send red light, green light, blue light and white light.
Though more than described the specific embodiment of the present invention; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than be used for qualification to scope of the present invention; those of ordinary skill in the art are in the modification and the variation of the equivalence of doing according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (17)
1. the method for a converting three-color grayscale value into four-color grayscale value is characterized in that: comprising:
Step S301: one first color gray values, one second color gray values and one the 3rd color gray values that obtain a picture element;
Step S302: calculate one second GTG difference between one first GTG difference, this second color gray values and the 3rd color gray values between this first color gray values and this second color gray values and one the 3rd GTG difference between the 3rd color gray values and this first color gray values;
Step S303: whether differentiate first to the 3rd GTG difference all less than threshold values;
Step S304: when this first GTG difference, this second GTG difference and the 3rd GTG difference during all less than a threshold values, produce one first color GTG conversion value, one second color GTG conversion value, one the 3rd color GTG conversion value and one the 4th color GTG conversion value according to this first color gray values, this second color gray values and the 3rd color gray values, this moment, the 4th color GTG conversion value was greater than zero; And
Step S305: when the one of this first GTG difference, this second GTG difference and the 3rd GTG difference during greater than this threshold values, produce this first color GTG conversion value, this second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value, this moment, the 4th color GTG conversion value was zero, and this first color GTG conversion value, this second color GTG conversion value and the 3rd color GTG conversion value equal this first color gray values, this second color gray values and the 3rd color gray values respectively.
2. the method for converting three-color grayscale value into four-color grayscale value as claimed in claim 1 is characterized in that: described step S304 comprises:
Produce the 4th color GTG conversion value, this moment, the 4th color GTG conversion value equaled the middle reckling of this first color gray values, this second color gray values and the 3rd color gray values;
Produce this first color GTG conversion value, this first color GTG conversion value equaled this first color gray values and deducted the 4th color GTG conversion value this moment;
Produce this second color GTG conversion value, this second color GTG conversion value equaled this second color gray values and deducted the 4th color GTG conversion value this moment; And
Produce the 3rd color GTG conversion value, the 3rd color GTG conversion value equaled the 3rd color gray values and deducted the 4th color GTG conversion value this moment.
3. the method for converting three-color grayscale value into four-color grayscale value as claimed in claim 1, it is characterized in that: this first color gray values, this second color gray values and the 3rd color gray values are respectively red GTG value, green GTG value and blue GTG value, and this first color GTG conversion value, this second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value are respectively red GTG value, green GTG value, blue GTG value and white GTG value.
4. the method for converting three-color grayscale value into four-color grayscale value as claimed in claim 1 is characterized in that: this first GTG difference, this second GTG difference and the 3rd GTG difference are positive integer.
5. the device of a converting three-color grayscale value into four-color grayscale value is characterized in that: comprising:
One input block is obtained one first color gray values, one second color gray values and one the 3rd color gray values of a picture element;
One first subtrator couples this input block, calculates one first GTG difference between this first color gray values and this second color gray values;
One second subtrator couples this input block, calculates one second GTG difference between this second color gray values and the 3rd color gray values;
One the 3rd subtrator couples this input block, calculates one the 3rd GTG difference between the 3rd color gray values and this first color gray values;
One judgement unit couples this first subtrator, this second subtrator and the 3rd subtrator, whether differentiates this first GTG difference, this second GTG difference and the 3rd GTG difference all less than a threshold values, and produces a differentiation result according to this; And
One converting unit, couple this input block and this judgement unit, when this differentiation result is designated as when being, this converting unit is according to this first color gray values, this second color gray values and the 3rd color gray values produce one first color GTG conversion value, one second color GTG conversion value, one the 3rd color GTG conversion value and one the 4th color GTG conversion value, this moment, the 4th color GTG conversion value was greater than zero, when this differentiation result is designated as not, this converting unit produces this first color GTG conversion value, this second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value, this moment, the 4th color GTG conversion value was zero, this first color GTG conversion value, this second color GTG conversion value and the 3rd color GTG conversion value equal this first color gray values respectively, this second color gray values and the 3rd color gray values.
6. the device of converting three-color grayscale value into four-color grayscale value as claimed in claim 5, it is characterized in that: when this differentiation result is designated as when being, the 4th color GTG conversion value equals this first color gray values, the middle reckling of this second color gray values and the 3rd color gray values, this first color GTG conversion value equals this first color gray values and deducts the 4th color GTG conversion value, this second color GTG conversion value equals this second color gray values and deducts the 4th color GTG conversion value, and the 3rd color GTG conversion value equals the 3rd color gray values and deducts the 4th color GTG conversion value.
7. the device of converting three-color grayscale value into four-color grayscale value as claimed in claim 5, it is characterized in that: this first color gray values, this second color gray values and the 3rd color gray values are respectively red GTG value, green GTG value and blue GTG value, and this first color GTG conversion value, this second color GTG conversion value, the 3rd color GTG conversion value and the 4th color GTG conversion value are respectively red GTG value, green GTG value, blue GTG value and white GTG value.
8. the device of converting three-color grayscale value into four-color grayscale value as claimed in claim 5 is characterized in that: this first GTG difference, this second GTG difference and the 3rd GTG difference are positive integer.
9. the driving method of a LCD, this LCD comprises a panel module and a backlight module, this backlight module comprises a red backlight, a green colored backlights source, a blue backlight, it is characterized in that: this backlight module also comprises a white backlight source, and the driving method of this LCD comprises:
Obtain a red GTG value, a green GTG value and a blue GTG value of a picture element;
Calculate between one first GTG difference, this green GTG value and this blueness GTG value between this redness GTG value and this green GTG value one second GTG difference and should blueness GTG value and this redness GTG value between one the 3rd GTG difference;
When this first GTG difference, this second GTG difference and the 3rd GTG difference during all less than a threshold values, produce a red GTG conversion value, a green GTG conversion value, a blue GTG conversion value and a white GTG conversion value according to this redness GTG value, this green GTG value and this blueness GTG value, this moment should white GTG conversion value greater than zero;
When the one of this first GTG difference, this second GTG difference and the 3rd GTG difference during greater than this threshold values, produce this redness GTG conversion value, this green GTG conversion value, this blueness GTG conversion value and this white GTG conversion value, should white GTG conversion value be zero this moment, and this redness GTG conversion value, this green GTG conversion value and this blueness GTG conversion value equal this redness GTG value, this green GTG value and this blueness GTG value respectively;
This panel module is according to this redness GTG conversion value and cooperate red backlight that this redness backlight sent, to show a red sprite of a picture frame;
This panel module is according to this green GTG conversion value and the green colored backlights that cooperates this green colored backlights source to be sent, to show a green sprite of this picture frame;
This panel module is according to this blueness GTG conversion value and cooperate blue backlight that this blueness backlight sent, to show a blue sprite of this picture frame; And
This panel module is according to this white GTG conversion value and the white backlight that cooperates this white backlight source to be sent, to show the white sprite of this picture frame.
10. the driving method of LCD as claimed in claim 9, be characterised in that: when this first GTG difference, this second GTG difference and the 3rd GTG difference during all less than this threshold values, the step that produces this redness GTG conversion value, this green GTG conversion value, this blueness GTG conversion value and this white GTG conversion value according to this redness GTG value, this green GTG value and this blueness GTG value comprises:
Produce this white GTG conversion value, should white GTG conversion value equal the middle reckling of this redness GTG value, this green GTG value and this blueness GTG value this moment;
Produce this redness GTG conversion value, should redness GTG conversion value equal this redness GTG value this moment and deduct this white GTG conversion value;
Produce this green GTG conversion value, should green GTG conversion value equal this green GTG value this moment and deduct this white GTG conversion value; And
Produce this blueness GTG conversion value, should blueness GTG conversion value equal this blueness GTG value this moment and deduct this white GTG conversion value.
11. the driving method of LCD as claimed in claim 9 is characterised in that: this first GTG difference, this second GTG difference and the 3rd GTG difference are positive integer.
12. a LCD comprises a panel module and a backlight module, it is characterized in that: also comprise a data processing module, described data processing module comprises:
One input block is obtained a red GTG value, a green GTG value and a blue GTG value of a picture element;
One first subtrator couples this input block, calculates one first GTG difference between this redness GTG value and this green GTG value;
One second subtrator couples this input block, calculates one second GTG difference between this green GTG value and this blueness GTG value;
One the 3rd subtrator couples this input block, calculates one the 3rd GTG difference between this blueness GTG value and this redness GTG value;
One judgement unit couples this first subtrator, this second subtrator and the 3rd subtrator, whether differentiates this first GTG difference, this second GTG difference and the 3rd GTG difference all less than a threshold values, and produces a differentiation result according to this; And
One converting unit, couple this input block and this judgement unit, when this differentiation result is designated as when being, this converting unit is according to this redness GTG value, this green GTG value and this blueness GTG value produce a red GTG conversion value, one green GTG conversion value, an one blue GTG conversion value and a white GTG conversion value, this moment should white GTG conversion value greater than zero, when this differentiation result is designated as not, this converting unit produces this redness GTG conversion value, this green GTG conversion value, this blueness GTG conversion value and this white GTG conversion value, should white GTG conversion value be zero this moment, this redness GTG conversion value, this green GTG conversion value and this blueness GTG conversion value equal this redness GTG value respectively, this green GTG value and this blueness GTG value;
Described panel module couples this data processing module, a red sprite that shows a picture frame according to this redness GTG conversion value, a green sprite that shows this picture frame according to this green GTG conversion value, show a blue sprite of this picture frame according to this blueness GTG conversion value, and show a white sprite of this picture frame according to this white GTG conversion value; And
Described backlight module is disposed under this panel module, cooperate the action of this panel module in time to produce red backlight, green colored backlights, blue backlight and white, make this panel module show this redness sprite, this green sprite, this blueness sprite and this white sprite by light.
13. LCD as claimed in claim 12, it is characterized in that: when this differentiation result is designated as when being, this converting unit is according to this redness GTG value, this green GTG value and this blueness GTG value produce this redness GTG conversion value, this green GTG conversion value, this blueness GTG conversion value and this white GTG conversion value, should equal this redness GTG value by white GTG conversion value this moment, reckling among this green GTG value and this blueness GTG value, this redness GTG conversion value equals this redness GTG value and deducts this white GTG conversion value, this green GTG conversion value equals this green GTG value and deducts this white GTG conversion value, and this blueness GTG conversion value equals this blueness GTG value and deducts this white GTG conversion value.
14. LCD as claimed in claim 12 is characterized in that: this first GTG difference, this second GTG difference and the 3rd GTG difference are positive integer.
15. LCD as claimed in claim 12 is characterized in that: this backlight module comprises:
One red backlight, it is red backlight to cooperate the action of this panel module in time to produce, and makes this panel module show this redness sprite;
One green colored backlights source cooperates the action of this panel module in time to produce green colored backlights, makes this panel module show this green sprite;
One blue backlight, it is blue backlight to cooperate the action of this panel module in time to produce, and makes this panel module show this blueness sprite; And
One white backlight source cooperates the action of this panel module in time to produce white backlight, makes this panel module show this white sprite;
This redness backlight is the back light source in LED that can independently send red light, this green colored backlights source is the back light source in LED that can independently send green light, this blueness backlight is the back light source in LED that can independently send blue light, and this white backlight source is the back light source in LED that can independently send white light.
16. LCD as claimed in claim 12 is characterized in that: this backlight module comprises:
One red green blue backlight cooperates the action of this panel module in time to produce red backlight, green colored backlights and blue backlight, makes this panel module show this redness sprite, this green sprite and this blueness sprite; And
One white backlight source cooperates the action of this panel module in time to produce white backlight, makes this panel module show this white sprite;
The green blue backlight of this redness is the back light source in LED that can send red light, green light and blue light, and this white backlight source is the back light source in LED that can independently send white light.
17. LCD as claimed in claim 12, it is characterized in that: this backlight module comprises a red green blue white backlight source, cooperate the action of this panel module in time to produce red backlight, green colored backlights, blue backlight and white backlight, making this panel module show this redness sprite, this green sprite, this blueness sprite and this white sprite, should the green blue white backlight of redness source be the back light source in LED that can send red light, green light, blue light and white light wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910112492A CN101702304A (en) | 2009-09-10 | 2009-09-10 | Device for converting three-color grayscale value into four-color grayscale value and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910112492A CN101702304A (en) | 2009-09-10 | 2009-09-10 | Device for converting three-color grayscale value into four-color grayscale value and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101702304A true CN101702304A (en) | 2010-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910112492A Pending CN101702304A (en) | 2009-09-10 | 2009-09-10 | Device for converting three-color grayscale value into four-color grayscale value and method thereof |
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| CN (1) | CN101702304A (en) |
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| CN102376278A (en) * | 2010-08-09 | 2012-03-14 | 瀚宇彩晶股份有限公司 | Image compensation apparatus and method thereof, and field color sequential method liquid crystal display |
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| CN102376278B (en) * | 2010-08-09 | 2013-07-10 | 瀚宇彩晶股份有限公司 | Image compensation apparatus and method thereof, and field color sequential method liquid crystal display |
| CN102376278A (en) * | 2010-08-09 | 2012-03-14 | 瀚宇彩晶股份有限公司 | Image compensation apparatus and method thereof, and field color sequential method liquid crystal display |
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| CN107799079A (en) * | 2017-10-10 | 2018-03-13 | 惠科股份有限公司 | Method for driving liquid crystal display, device and equipment |
| CN107799079B (en) * | 2017-10-10 | 2019-06-11 | 惠科股份有限公司 | Method for driving liquid crystal display, device and equipment |
| WO2019085645A1 (en) * | 2017-11-03 | 2019-05-09 | 惠科股份有限公司 | Driving system and method for three-color pixel display panel and four-color pixel display panel |
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| CN109671399A (en) * | 2018-12-11 | 2019-04-23 | 惠科股份有限公司 | A kind of driving method of display module, drive system and display device |
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