CN101582249B - Field sequential color display and color sequence control method thereof - Google Patents
Field sequential color display and color sequence control method thereof Download PDFInfo
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Abstract
The invention is applicable to the technical field of display and provides a field sequential color display and a color sequence control method thereof, wherein the field sequential color display comprises a display panel and a back light module, the back light module provides a back light source to the display panel, wherein the back light source comprises red back light, blue back light and green back light. The color sequence control method of the field sequential color display comprises the steps of sequentially dividing a picture frame cycle of the display panel to a first sub-picture frame period, a second sub-picture frame period and a third sub-picture frame period; sequentially providing blue green back light and the red back light in a first back light period of the first sub-picture frame period; sequentially providing magenta back light and the green backlight in a second back light period of the second sub-picture frame period; and sequentially providing yellow back light and the blue backlight in a third back light period of the third sub-picture frame period, thereby eliminating the color separation phenomenon and compensating the reduced overall brightness and the reduced image color brilliance caused by reduced light open time of a main color axis.
Description
Technical field
The invention belongs to the display technique field, relate in particular to a kind of color sequential display and color sequence control method thereof.
Background technology
Evolution along with photoelectricity and semiconductor technology; Also driven the flourish of flat-panel monitor (Flat Panel Display); And in many flat-panel monitors; LCD (Liquid Crystal Display, be called for short LCD) has become the main flow in market because of having advantageous characteristic such as high spatial utilization ratio, low consumpting power, radiationless and low electromagnetic interference (EMI).
LCD generally comprises display panels (Liquid Crystal PaneI) and backlight module (Black Light Module is called for short BL).Because display panels itself does not have self luminous characteristic, therefore must backlight module be configured in the display panels below, to provide display panels required area source, so LCD could be watched to the user by show image.
Color according to LCD shows the colour mixture mode, roughly is divided into two types of timeliness colour mixture and spatiality colour mixtures (being also referred to as and putting addition or while addition).Mostly common display is spatiality and puts additive color mixing at present.With Thin Film Transistor-LCD (Thin-Film Transistor Liquid Crystal Display; Be called for short TFT-LCD) be example; Each display pixel constitutes by the colored filter (Color Filter is called for short CF) of RGB (Red Green Blue is called for short RGB) three subpixels (Subpixel); Generally speaking the size of sub-pixel can reach the colour mixture effect much smaller than the distinguishable scope of human eye in human visual perception.
The spatiality colour mixture of TFT-LCD is if replace with the timeliness colour mixture; Then need not to use colored filter to constitute the colour mixture effect; And direct backlight collocation relative data demonstration with different colours; Can reach the colour mixture effect of timeliness, also can increase the module transmitance and save the integral module manufacturing cost.
The field color sequential display 1000 that Fig. 1 provides for prior art (Field Sequential Color Display is called for short FSCD) drive circuit structure figure.Please with reference to Fig. 1, look preface method controller 1400 converts the R → G → B video signal data output (being so-called look preface method) of timeliness serial in order to the spatiality RGB video signal data arranged side by side (Video Data) with video signal source (Video Source) 1200 system ends.Then, look preface method controller 1400 synchro control backlight modules 1600 make its collocation various colors data, produce corresponding light source, and then present colour picture in display panel 1800.
In addition, for avoiding RGB in its write cycle, data scanning is write the fashionable colour mixture situation that causes, and needs the backlight data scanning of arranging in pairs or groups is done the action of switch, and its drive waveforms is as shown in Figure 2.Fig. 2 for prior art provide the field color sequential display drive waveforms figure.As shown in Figure 2, data are write fashionable backlight and are closed, and open backlight again after data write and finish, and so, just can reach the timeliness colour mixture of RGB and the generation of avoiding wrong colour mixture.In addition; Because look preface method is divided into three primary colors R, G, B image with chromatic image; Therefore, a picture frame (Frame) in the time if show three primary colors R, G, B image in regular turn, the expression image frequency need reach 180Hz; Then the liquid crystal reaction time need be lower than 5.56ms at least, just can avoid the generation of wrong colour mixture.
Yet; Because human eye Chang Yin jumps at random and looks, or follows the trail of the instinct of mobile object in the picture, make object colour field of all kinds not drop on the retina same point; Therefore; When making the use color sequential display, human eye can feel just that visually object edge so-called look occurs and separates (Color Break Up is called for short CBU) phenomenon.And the generation of look segregation phenomenon is because of the trichromatic diagram field that chromatic image comprised, and pairing pixel is incident upon positions different on the retina to be discovered by the human visual system, makes the observer see that the image of color separated dislocation causes.In addition, because the edge of the object formation colour band arrangement in image usually of look segregation phenomenon, as the rainbow striped, so be called rainbow effect (Rainbow Effect) again.
The look segregation phenomenon also has report to point out except reducing the quality of image, after watching for a long time, possibly cause dizzy sensation.Improve the method for look segregation phenomenon at present; Mainly containing increases liquid crystal reaction velocity, change colour field order, dynamic frame compensation etc.; Yet said method can't effectively be eliminated the look segregation phenomenon all the time; All need complicated control algolithm and powerful driving circuit ability, and then the production of a color sequential display is restricted.
Summary of the invention
The purpose of the embodiment of the invention is to provide the color sequence control method of a kind of color sequential display; The field color sequential display that being intended to solve prior art provides improves the look segregation phenomenon through increasing methods such as liquid crystal reaction velocity, change colour field order, dynamic frame compensation; These methods all need complicated control algolithm and powerful driving circuit ability, the problem that the production of a feasible color sequential display is restricted.
The embodiment of the invention is to realize like this; The color sequence control method of a kind of color sequential display; Said color sequential display comprises display panel and backlight module; Said backlight module provides a backlight to said display panel, and wherein said backlight comprises red backlight, blue backlight and green backlight, and said color sequence control method comprises:
During the picture frame cycle of said display panel divided into the first sub-picture frame in regular turn, during the second sub-picture frame and during the 3rd sub-picture frame;
During the first sub-picture frame first backlight during, in during the second sub-picture frame second backlight during and during the 3rd sub-picture frame in the 3rd comprise respectively during backlight first son backlight during and second son backlight during;
According to the chroma maximal value of the chroma maximal value of red image data, green image data and the chroma maximum value calculation one minimal gamut scope of blue image data; And
During determining said first son backlight according to said minimal gamut scope with the ratio of second son during backlight;
During the said first sub-picture frame first backlight during, provide dark green and red backlight in regular turn; During the said second sub-picture frame second backlight during, provide carmetta with green backlight in regular turn; And in during the said the 3rd sub-picture frame the 3rd backlight during, provide yellow with blue backlight in regular turn.
Another purpose of the embodiment of the invention is to provide a kind of color sequential display, and said display comprises:
Display panel, its picture frame cycle divide into the first sub-picture frame in regular turn during, during the second sub-picture frame and during the 3rd sub-picture frame; And backlight module; Be used to provide a backlight to said display panel; Said backlight comprises red backlight, blue backlight and green backlight, said backlight module in during the said first sub-picture frame first backlight during, provide dark green with red backlight in regular turn; During the said second sub-picture frame second backlight during; Provide carmetta with green backlight in regular turn, and in during the said the 3rd sub-picture frame the 3rd backlight during, provide yellow with blue backlight in regular turn;
During the said first sub-picture frame
First backlight during, in during the second sub-picture frame second backlight during with the 3rd sub-picture frame during in the 3rd comprise respectively during backlight first son backlight during with second son backlight during;
Look preface method controller, it comprises a processing module, said processing module specifically comprises:
The chroma analytic unit; Be used to analyze red image data, green image data and blue image data, to find out respectively corresponding to the peaked first red image data of the chroma in the said red image data, corresponding to the peaked first green image data of the chroma in the said green image data and corresponding to the peaked first blue image data of the chroma in the said blue image data;
Colour gamut decision unit; It couples said chroma analytic unit; Calculate the minimal gamut scope according to the said first red image data, the first green image data and the first blue image data; And produce first pwm control signal, second pwm control signal and the 3rd pwm control signal according to said minimal gamut scope, with adjust said first son backlight during with second son ratio during backlight; And
The data generation unit is exported said red image data, green image data and blue image data with the sequence mode.
Comprehensively above-mentioned, the embodiment of the invention shows three kinds of image datas of RGB with the DISPLAY ORDER backlight of CRMGYB, with the gamut range of reduction LCD to reduce the phenomenon that look separates.Simultaneously, the embodiment of the invention is carried out parachrome axle colour mixture and is handled in mass-tone axle nonclient area, in three kinds of RGB originally are backlight, insert three kinds of CMY backlight and adjust CMY activation backlight according to the gamut range of indivedual pictures during ratio.So not only can carry out the elimination of look segregation phenomenon, can also compensate because of the lighting time reduction of mass-tone axle, the problem that integral brightness that is caused and picture color vividness reduce.
Description of drawings
Fig. 1 is the Organization Chart of driving circuit of the field color sequential display that provides of prior art;
Fig. 2 be prior art provide the field color sequential display drive waveforms figure;
Fig. 3 A is NTSC 100% gamut map that international lighting association (CIE) was formulated in 1931;
Fig. 3 B is NTSC 123.19% gamut map that international lighting association (CIE) was formulated in 1931;
Fig. 4 A be the embodiment of the invention provide the field color sequential display drive circuit structure figure;
Fig. 4 B is the detailed circuit Organization Chart of the processing module of Fig. 4 A
Fig. 4 C is the detailed circuit Organization Chart of the colour gamut decision unit of Fig. 4 B;
Fig. 5 is the drive waveforms figure of the field color sequential display of application drawing 4A;
Fig. 6 be embodiments of the invention provide colour gamut reduction conceptual schematic view;
Fig. 7 is the color sequence controlling method process flow diagram of the field color sequential display of application drawing 4A.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Technical field has common knowledge the knowledgeable should to know well so-called colour gamut is by (the Commission International De ' l E ' clairage of international lighting association under the present invention; CIE) formulated in 1931, and the gamut range that this association made is the regional A among Fig. 3 A.Wherein, regional A is the Color Range that the expression human eye can be discovered.Shown in Fig. 3 A, basically, the colour gamut coordinate of any color all can be so that (x, y) coordinate is represented, mainly is used for representing the formed colour gamut of three Essential colour (that is red, green and blue).Wherein, by three leg-of-mutton area B that end points surrounded scopes of the change color that is used for representing that LCD can appear, and the gamut range that on behalf of LCD, this scope also to show.Therefore, the gamut range of LCD is bigger, and the area B that this triangle constituted is just big more, otherwise the gamut range of LCD is littler, and the area B that this triangle constituted is just more little.
Yet the gamut range of LCD is not more extensively good more, and is relative though Fig. 3 B has bigger gamut range (being that zone C is greater than area B) compared with Fig. 3 A because as shown in Fig. 3 B, and Fig. 3 B partly has been partial to blueness at white point W.Therefore, if when being used as the gamut range of a color sequential display with zone C, if do not carry out suitable color correction, very serious look segregation phenomenon will take place.Because the color that it can show is more diversified, it is more serious to cause object colour field of all kinds to be incident upon the look segregation phenomenon of diverse location on the retina.Opposite, if the area B of Fig. 3 A is reduced colour gamut, just can reduce the color representation degree of a color sequential display, and then reduce the look segregation phenomenon of human visual system institute perception.
Based on above-mentioned, the present invention provides a kind of color sequential display and color sequence control method thereof.In this control method, mainly be the characteristic of considering the high colour saturation of light emitting diode (Light Emitting Diode is hereinafter to be referred as LED), reduce the look segregation phenomenon of human visual system institute perception through the notion of reduction colour gamut.Following content will be elaborated to the technical characterictic and the effect of this case.
Fig. 4 A be the embodiment of the invention provide the field color sequential display drive circuit structure figure.Please with reference to Fig. 4 A, a color sequential display 2000 comprises the picture frame storer (Frame Memory) 2400 of display panel 2100, backlight module 2200, look preface method controller 2300 and responsible storage data.In embodiments of the present invention, look preface method controller 2300 further comprises processing module 2310, memory control unit 2320, timing control unit 2330 and output/input interface 2340a, 2340b.
Timing control unit 2330 is responsible for sending the correlation timing signal to give source electrode driver 2110 and gate pole driver 2120.The data access of memory control unit 2320 control picture frame storeies 2400.
Fig. 5 is the drive waveforms figure of the field color sequential display of application drawing 4A.Please be simultaneously with reference to Fig. 4 A and Fig. 5, in embodiments of the present invention, the picture frame cycle T of display panel 2100 is divided into during T1 during the first sub-picture frame, the second sub-picture frame T3 during the T2 and the 3rd sub-picture frame in regular turn.Because on time shaft; Picture frame rate originally is 60 (picture frame/per seconds) (Frame per Second; Fps); That is to say that approximately per 16.67 milliseconds just have a complete colour picture; Therefore according to the embodiment of the invention color sequential display 2000 is proposed; Then need be increased to the picture frame rate for example is 180 (picture frame/per seconds), and promptly each opens sub-picture frame with 1/180th second
5.56 milliseconds of demonstrations, could form a complete colour picture by three sub-picture frames.
In this example embodiment, backlight module 2200 provides backlight (not shown) a to display panel 2100, and wherein, backlight comprises red backlight, blue backlight and green backlight.Processing module 2310 can be during the first sub-picture frame writes red image data, green image data and blue image data to display panel 2100 among the T3 during T2 and the 3rd sub-picture frame during T1, the second sub-picture frame in regular turn.Simultaneously, provide corresponding backlight during the backlight module 2,200 first sub-picture frames during T1, the second sub-picture frame during T2 and the 3rd sub-picture frame among the T3 to show.
In the prior art; Pairing the backlight of red, green and blueness that be respectively backlight of T3 during T2 and the 3rd sub-picture frame during T1, the second sub-picture frame during the first sub-picture frame; And in the present embodiment; Backlight module 2200 can be during the first sub-picture frame among the T1 first backlight during L1 provide in regular turn that dark green (C) and red (R's) is backlight with the exhibit red image data; During the second sub-picture frame among the T2 second backlight during L2 carmetta (M) and green (G) be provided in regular turn backlight showing green image data, during the 3rd sub-picture frame among the T3 the 3rd backlight during L3 provide in regular turn that yellow (Y) and blue (B's) is backlight to show blue image data.
Can be respectively during the activation backlight of three kinds of colors of RGB by controlling the effective period (Duty Cycle) of first pulse width modulation (Pulse Width Modulation is hereinafter to be referred as PWM) control signal PWM1, the second pwm control signal PWM2 and the 3rd pwm control signal PWM3.The backlight of dark green (C) can be made up of green with blue institute backlight; Therefore first backlight during first son of L1 backlight during among the D1; The red first pwm control signal PWM1 anergy backlight of control, and green with the blue second pwm control signal PWM2 and the 3rd pwm control signal PWM3 activation of control.And first backlight during second son of L1 backlight during among the D2, the red first pwm control signal PWM1 activation backlight of control is only arranged.
The backlight of carmetta (M) can be made up of red with blue institute backlight; Therefore second backlight during first son of L2 backlight during among the D1; The second pwm control signal PWM2 anergy of control green colored backlights, and red with the blue first pwm control signal PWM1 and the 3rd pwm control signal PWM3 activation of control.And second backlight during second son of L1 backlight during among the D2, the second pwm control signal activation PWM2 of control green colored backlights is only arranged.
The backlight of yellow (Y) can be made up of red with green institute backlight; Therefore the 3rd backlight during first son of L3 backlight during among the D1; Blue the 3rd pwm control signal PWM3 anergy backlight of control, and red with the green first pwm control signal PWM1 and the second pwm control signal PWM2 activation of control.And the 3rd backlight during second son of L3 backlight during among the D2, blue the 3rd pwm control signal PWM3 activation backlight of control is only arranged.
Can know that by above-mentioned and Fig. 5 the order backlight that backlight module 2200 is provided is CRMGYB, three kinds of image datas that mainly are used for showing three kinds of colors of its RGB backlight of RGB wherein, three kinds of CMY that inserts are backlight then to be to be used for strengthening picture gray scale and colour vividness.As for first among L1～L3 during each is backlight son backlight during D1 with second sub backlight during the ratio of D2 then determine by the chroma maximal value of the three kinds of image datas of RGB in the same picture (Frame).For example, two kinds of displaying ratios backlight of C and R are to be determined by the maximum chroma value in the red image data.In procedure for displaying; Look preface method controller 2300 in the present embodiment can be according to the chroma maximum value calculation one minimal gamut scope in the three kinds of image datas of RGB in the same picture, then according to its minimal gamut scope decision indivedual backlight during first son among L1～L3 backlight during D1 with second sub backlight during the ratio of D2.
Next, further specify the circuit framework figure of processing module 2310, Fig. 4 B is the detailed circuit Organization Chart of the processing module 2310 of Fig. 4 A.Shown in Fig. 4 B, processing module 2310 comprises chroma analytic unit 2311, colour gamut decision unit 2312, data generation unit 2313, timing control signal generation unit 2314 and memory control signal generation unit 2315.Data generation unit 2313 receives red image data R_Data, green image data G_Data and blue image data B_Data; And be converted into sequence picture frame data S_Data to source electrode driver 2110; And export synchronizing signal DE to timing control signal generation unit 2314 and memory control signal generation unit 2315 simultaneously; For the control signal T_Ctrl of timing control signal generation unit 2314 generation frequencys multiplication, and memory control signal generation unit 2315 produces the control signal M_Ctrl of access picture frame storeies 2400.
In embodiments of the present invention; Chroma analytic unit 2311 is analyzed red image data R_Data, green image data G_Date and blue image data B_Date, to find out respectively corresponding to the peaked first red image data R_Max of the chroma among the red image data R_Date, corresponding to the peaked first green image data G_Max of the chroma among the green image data G_Date and corresponding to the peaked first blue image data B_Max of the chroma among the blue image data B_Date.
Colour gamut decision unit 2312 couples chroma analytic unit 2311; Calculate the minimal gamut scope according to the first red image data R_Max, the first green image data G_Max and the first blue image data B_Max, and produce the first pwm control signal PWM1, the second pwm control signal PWM2 and the 3rd pwm control signal PWM3 according to the minimal gamut scope.Wherein, the first pwm control signal PWM1, the second pwm control signal PWM2 and the 3rd pwm control signal PWM3 respectively in order to control as shown in Figure 5 first backlight during L1, second backlight during L2, the 3rd backlight during among the L3 first son backlight during D1 with second sub backlight during the ratio of D2.
Fig. 4 C is the detailed circuit Organization Chart of the colour gamut decision unit 2312 of Fig. 4 B.Shown in Fig. 4 C, colour gamut decision unit 2312 comprises the first transition matrix unit 2312a, colour gamut analytic unit 2312b, the second transition matrix unit 2312c, BLC unit 2312d and PWM generation unit 2312e.
The first transition matrix unit 2312a receives the first red image data R_Max, the first green image data G_Max and the first blue image data B_Max from chroma analytic unit 2311; And calculate the first red image data R_Max, the first green image data G_Max and the first blue image data B_Max and on the CIE1931 gamut map, distinguish corresponding first reference coordinate (x1; Y1), the second reference coordinate (x2; Y2) and the 3rd reference coordinate (x3; Y3), it illustrates as shown in Figure 6, please be simultaneously with reference to Fig. 4 C and Fig. 6.
Then, colour gamut analytic unit 2312b just can according to first reference coordinate (x1, y1), the second reference coordinate (x2; Y2) and the 3rd reference coordinate (x3; Y3) formed delta-shaped region determines a minimal gamut scope (being region D), and export first reference coordinate (x1, y1), the second reference coordinate (x2; Y2) and the 3rd reference coordinate (x3 y3) gives the second transition matrix unit 2312c.In addition, the area E among Fig. 6 is represented the original gamut range that 2000 of color sequential displays can appear.
In addition; The second transition matrix unit 2312c is in order to the first reference coordinate (x1; Y1), the second reference coordinate (x2; Y2) and the 3rd reference coordinate (x3 y3) changes back the first red image data R_Max, the first green image data G_Max and the first blue image data B_Max, and the relevant information that transmits the minimal gamut scope is given BLC unit 2312d.
Then; BLC unit 2312d can according to minimal gamut scope (region D) determine respectively first backlight during L1 (as shown in Figure 5), second backlight during L2 and the 3rd backlight during first son of L3 backlight during D1 with second sub backlight during the ratio of D2; To produce the first backlight control signal R_Ctrl, the second backlight control signal G_Ctrl and the 3rd backlight control signal B_Ctrl respectively; Its detail operations situation is following: at first, whether the BLC unit 2312d present minimal gamut scope of comparison (region D) earlier has smaller or equal to 50% of original gamut range (area E).If; Then represent present picture not allow and carry out the computing that colour gamut is reduced again; Just backlight module 2200 (being illustrated in Fig. 4 A) can be in Fig. 5 first backlight during L1 whole process provide red (R) backlight, in second backlight during L2 whole process the backlight of green (G) is provided, and in the 3rd backlight during L3 whole process the backlight of blue (B) is provided.Promptly second the son backlight during D2 account for first backlight during L1 100%, second backlight during L2 the 100% and the 3rd backlight during L3 100%.
Otherwise; If minimal gamut scope (region D) is greater than 50% of original gamut range (area E) at present; BLC unit 2312d can carry out first son backlight during D1 (being illustrated in Fig. 5) with second son backlight during the proportional distribution of D2, its proportional distribution is to decide according to the size of minimal gamut scope (region D).In detail, if region D more little (being that mass-tone axle d is more little), then first son backlight during D1 long more, otherwise if region D bigger (being that mass-tone axle d is big more), D1 was just short more during first son was backlight.So, BLC unit 2312d just can be respectively according to first backlight during L1, second backlight during L2 with first backlight during among the L3 first son backlight during D1 and second sub backlight during the ratio of D2 export the first backlight control signal R_Ctrl, the second backlight control signal G_Ctrl and the 3rd backlight control signal B_Ctrl to PWM generation unit 2312e respectively.Then; PWM generation unit 2312e just can produce the first pwm control signal PWM1 as shown in Figure 5, the second pwm control signal PWM2 and the 3rd pwm control signal PWM3 respectively according to the first backlight control signal R_Ctrl, the second backlight control signal G_Ctrl and the 3rd backlight control signal B_Ctrl, to carry out dynamic adjustment backlight.
It should be noted that; Above-mentionedly whether can decide according to the display of design requirement and application smaller or equal to 50% judgement of original gamut range (area E) for minimal gamut scope (region D); In another embodiment of the present invention, also can not do above-mentioned judgement, directly according to during the minimal gamut scope adjustment activation out of the ordinary backlight.
From another viewpoint; The foregoing description can be summarized the color sequence control method of a kind of color sequential display; This color sequential display comprises a display panel and a backlight module; This backlight module provides backlight to a display panel, and wherein this backlight comprises red backlight, blue backlight and green backlight.Above-mentioned color sequence control method is please with reference to Fig. 7, and Fig. 7 is the color sequence controlling method process flow diagram of a color sequential display 2000.As shown in Figure 7, the color sequence controlling method of the embodiment of the invention mainly may further comprise the steps: at first, the picture frame cycle T of display panel is divided into during T1 during the first sub-picture frame, the second sub-picture frame T3 (step S110) during the T2 and the 3rd sub-picture frame in regular turn.
Then, according to the chroma maximal value of the chroma maximal value in the red image data, green image data and the chroma maximum value calculation one minimal gamut scope (step S120) of blue image data.Come again, according to the minimal gamut scope determine first backlight during L1, second backlight during L2 and the 3rd backlight during among the L3 first son backlight during D1 with second sub backlight during the ratio (step S130) of D2.
Then, during the first sub-picture frame, write red image data to display panel (step S140) among the T1, and first among the T1 provides dark green (C) (step S150) backlight with red (R) among the L1 during backlight in regular turn during the first sub-picture frame.Come again, during the second sub-picture frame, write green image data to display panel (step S160) among the T2, then during the second sub-picture frame among the T2 second backlight during L2 backlight (the step S170) of carmetta (M) with green (G) is provided in regular turn.At last, during the 3rd sub-picture frame, write blue image data to display panel (step S180) among the T3, then during the 3rd sub-picture frame among the T3 the 3rd backlight during L3, yellow (Y) is provided (step S190) backlight with blue (B) in regular turn.
Then; Repeat above-mentioned steps; According to the adjustment of three kinds of the RGB of each picture frame minimal gamut scopes that image data calculated out of the ordinary backlight during in first son backlight during D1 with second son backlight during the ratio of D2, and reduce the phenomenon of look separation through the DISPLAY ORDER backlight of CRMGYB.
In addition, in embodiments of the present invention step S130 can further comprise judge the minimal gamut scope whether be less than or equal to backlight original gamut range 50%.If; Then first backlight during among the L1 whole process provide red (R) backlight, second backlight during among the L2 whole process the backlight of green (G) is provided; And the 3rd backlight during among the L3 whole process the backlight of blue (B) is provided; That is to say second son backlight during D2 account for first backlight during L1, second backlight during L2 and the 3rd backlight during L3 100%, promptly do not carry out colour gamut reduction this moment, to guarantee display enough color saturations are arranged.
Comprehensively above-mentioned, the embodiment of the invention shows three kinds of image datas of RGB with the DISPLAY ORDER backlight of CRMGYB, with the gamut range of reduction LCD to reduce the phenomenon that look separates.Simultaneously, the embodiment of the invention is carried out parachrome axle colour mixture and is handled in mass-tone axle nonclient area, in three kinds of RGB originally are backlight, insert three kinds of CMY backlight and adjust CMY activation backlight according to the gamut range of indivedual pictures during ratio.So not only can carry out the elimination of look segregation phenomenon, can also compensate because of the lighting time reduction of mass-tone axle, the problem that integral brightness that is caused and picture color vividness reduce.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; In spirit that does not break away from the present invention and scope, when doing a little change and retouching, so the claim person of defining that the present invention's protection domain attaches after looking is as the criterion.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all interior any modifications of doing in spirit of the present invention and principle, is equal to and replaces and improvement etc., all should be included in protection scope of the present invention in.
Claims (8)
1. the color sequence control method of a field color sequential display; It is characterized in that; Said color sequential display comprises display panel and backlight module; Said backlight module provides a backlight to said display panel, and wherein said backlight comprises red backlight, blue backlight and green backlight, and said color sequence control method comprises:
During the picture frame cycle of said display panel divided into the first sub-picture frame in regular turn, during the second sub-picture frame and during the 3rd sub-picture frame;
During the first sub-picture frame first backlight during, in during the second sub-picture frame second backlight during and during the 3rd sub-picture frame in the 3rd comprise respectively during backlight first son backlight during and second son backlight during;
According to the chroma maximal value of the chroma maximal value of red image data, green image data and the chroma maximum value calculation one minimal gamut scope of blue image data; And
During determining said first son backlight according to said minimal gamut scope with the ratio of second son during backlight; During the said first sub-picture frame first backlight during, provide dark green and red backlight in regular turn; During the said second sub-picture frame second backlight during, provide carmetta with green backlight in regular turn; And in during the said the 3rd sub-picture frame the 3rd backlight during, provide yellow with blue backlight in regular turn.
2. the color sequence control method of color sequential display as claimed in claim 1 is characterized in that, said in during the said first sub-picture frame first backlight during, provide in regular turn before dark green with the red step backlight, said method also comprises:
During the said first sub-picture frame, write a red image data to said display panel;
Said in during the said second sub-picture frame second backlight during, provide in regular turn before carmetta and the green step backlight, said method also comprises:
During the said second sub-picture frame, write a green image data to said display panel;
Said in during the said the 3rd sub-picture frame the 3rd backlight during, provide in regular turn before yellow with the blue step backlight, said method also comprises:
During the said the 3rd sub-picture frame, write a blue image data to said display panel.
3. the color sequence control method of color sequential display as claimed in claim 2 is characterized in that, said in during the said first sub-picture frame first backlight during, provide dark green with red step backlight to be specially in regular turn:
Said first backlight during in first son provide dark green backlight during backlight, said first backlight during in second son provide red backlight during backlight;
Said in during the said second sub-picture frame second backlight during, provide carmetta and green step backlight to be specially in regular turn:
Said second backlight during in first son provide carmine backlight during backlight, said second backlight during in second son provide green backlight during backlight;
Said in during the said the 3rd sub-picture frame the 3rd backlight during, provide yellow with blue step backlight to be specially in regular turn:
The said the 3rd backlight during in first son provide yellow backlight during backlight, the said the 3rd backlight during in second son provide blue backlight during backlight.
4. the color sequence control method of color sequential display as claimed in claim 1 is characterized in that, said the step of the ratio during backlight is specially with second son during determining said first son backlight according to said minimal gamut scope:
Judge said minimal gamut scope whether be less than or equal to said backlight original gamut range 50%;
When judge said minimal gamut scope be less than or equal to said original gamut range 50% the time; Said first backlight during in second son account for said first 100% during backlight during backlight; Said second backlight during in second son account for during backlight said second during backlight the 100%, the said the 3rd backlight during in second son account for the 3rd 100% during backlight during backlight.
5. the color sequence control method of as claimed in claim 1 color sequential display is characterized in that, said dark green institute backlight by green and blueness backlight forms; Said carmine institute backlight by red and blueness backlight forms; The backlight of said yellow is made up of red with green institute backlight.
6. a field color sequential display is characterized in that, said display comprises:
Display panel, its picture frame cycle divide into the first sub-picture frame in regular turn during, during the second sub-picture frame and during the 3rd sub-picture frame; And backlight module; Be used to provide a backlight to said display panel; Said backlight comprises red backlight, blue backlight and green backlight, said backlight module in during the said first sub-picture frame first backlight during, provide dark green with red backlight in regular turn; During the said second sub-picture frame second backlight during; Provide carmetta with green backlight in regular turn, and in during the said the 3rd sub-picture frame the 3rd backlight during, provide yellow with blue backlight in regular turn;
During the said first sub-picture frame first backlight during, in during the second sub-picture frame second backlight during with the 3rd sub-picture frame during in the 3rd comprise respectively during backlight first son backlight during with second son backlight during;
Look preface method controller, it comprises a processing module, said processing module specifically comprises:
The chroma analytic unit; Be used to analyze red image data, green image data and blue image data, to find out respectively corresponding to the peaked first red image data of the chroma in the said red image data, corresponding to the peaked first green image data of the chroma in the said green image data and corresponding to the peaked first blue image data of the chroma in the said blue image data;
Colour gamut decision unit; It couples said chroma analytic unit; Calculate the minimal gamut scope according to the said first red image data, the first green image data and the first blue image data; And produce first pwm control signal, second pwm control signal and the 3rd pwm control signal according to said minimal gamut scope, with adjust said first son backlight during with second son ratio during backlight; And
The data generation unit is exported said red image data, green image data and blue image data with the sequence mode.
7. as claimed in claim 6 color sequential display is characterized in that said processing module; During the said first sub-picture frame; Write red image data to said display panel, during the said second sub-picture frame in, write green image data to said display panel; And in during the said the 3rd sub-picture frame, write blue image data to said display panel.
8. as claimed in claim 6 color sequential display is characterized in that, said colour gamut decision unit specifically comprises:
The first transition matrix unit is used to calculate the said first red image data, the first green image data and the first blue image data corresponding first reference coordinate, second reference coordinate and the 3rd reference coordinate of difference on gamut map;
The colour gamut analytic unit is used for determining said minimal gamut scope according to said first reference coordinate, second reference coordinate and the 3rd reference coordinate, and exports said first reference coordinate, second reference coordinate and the 3rd reference coordinate;
The second transition matrix unit is used for converting said first reference coordinate, second reference coordinate and the 3rd reference coordinate into the said first red image data, the first green image data and the first blue image data;
The BLC unit, during being used for determining said first son backlight according to said minimal gamut scope with the ratio of second son during backlight, to produce first backlight control signal, second backlight control signal and the 3rd backlight control signal;
The PWM generation unit; Be used for according to said first backlight control signal, second backlight control signal and corresponding respectively said first pwm control signal, second pwm control signal and the 3rd pwm control signal of producing of the 3rd backlight control signal, with adjust said first son backlight during with second son ratio during backlight.
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| CN2009101077480A CN101582249B (en) | 2009-05-25 | 2009-05-25 | Field sequential color display and color sequence control method thereof |
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| CN103198780B (en) * | 2012-01-06 | 2015-10-28 | 群康科技(深圳)有限公司 | Display device |
| TWI467556B (en) * | 2012-07-20 | 2015-01-01 | Chunghwa Picture Tubes Ltd | Color display method for field sequential color lcd |
| CN103105691A (en) * | 2013-01-30 | 2013-05-15 | 江苏亿成光电科技有限公司 | Color vertical arrangement type liquid crystal display (LCD) |
| CN103105700A (en) * | 2013-01-30 | 2013-05-15 | 江苏亿成光电科技有限公司 | Liquid crystal display |
| JP2015082024A (en) * | 2013-10-22 | 2015-04-27 | 株式会社ジャパンディスプレイ | Display device, driving method of display device, and electronic apparatus |
| CN104036748B (en) * | 2014-06-20 | 2016-06-08 | 深圳市华星光电技术有限公司 | Field color sequential display and color control method thereof |
| TWI540340B (en) * | 2014-10-31 | 2016-07-01 | 宇勤科技（深圳）有限公司 | Liquid crystal display and method of manufacturing the same |
| CN104464649B (en) * | 2014-12-10 | 2018-02-13 | 深圳市华星光电技术有限公司 | Field color-sequential method liquid crystal display device and its driving method |
| TWI534478B (en) * | 2014-12-17 | 2016-05-21 | 宇勤科技（深圳）有限公司 | Method of making field sequential color lcd |
| TWI562127B (en) * | 2015-11-30 | 2016-12-11 | Au Optronics Corp | Displaying method and displaying device |
| TWI575497B (en) * | 2016-02-19 | 2017-03-21 | 友達光電股份有限公司 | Display method and display device |
| CN106710506B (en) * | 2017-01-18 | 2020-07-14 | 京东方科技集团股份有限公司 | Driving method and driving circuit of display panel, display panel and display device |
| CN113763907A (en) * | 2017-08-21 | 2021-12-07 | 群创光电股份有限公司 | Display device |
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