CN106652937A - Method of converting RGB to RGBW - Google Patents

Method of converting RGB to RGBW Download PDF

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Publication number
CN106652937A
CN106652937A CN201611153750.8A CN201611153750A CN106652937A CN 106652937 A CN106652937 A CN 106652937A CN 201611153750 A CN201611153750 A CN 201611153750A CN 106652937 A CN106652937 A CN 106652937A
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value
brightness
rgbw
pixel
rgb
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CN106652937B (en
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钟新辉
潘彪
崔宏青
李得俊
龙柏华
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The invention provides a method of converting RGB to RGBW. The method comprises steps: the gray scale value of an RGB signal of each pixel point in the current frame of image is acquired; the gray scale value of the RGB signal of each pixel point is converted to a brightness value, and the brightness value is subjected to normalization processing; the gain value of each pixel point after normalization processing is calculated, the gain values of pixel points meeting a preset requirement in the whole frame of image are counted, and a cumulative distribution curve for the gain values of the pixel points in the whole frame of image is obtained; one longitudinal coordinate value of the cumulative distribution curve set by a user is received, and a horizontal ordinate value corresponding to the longitudinal coordinate value serves as a frame gain value; according to the frame gain value and a preset rule, an output value of RGBW is acquired and outputted; and according to the size of the frame gain value, the brightness of backlight is adjusted. While the brightness of the image is enhanced, the color distortion problem appearing in an RGBW display mode is improved, and the saturation of the image is improved.

Description

A kind of RGB turns the conversion method of RGBW
【Technical field】
The present invention relates to technical field of liquid crystal display, more particularly to a kind of RGB turns the conversion method of RGBW.
【Background technology】
The principle of RGBW liquid crystal display technologies, is that a kind of white (W) sub-pixel is added to by red (R), green (G), indigo plant (B) three Colour cell into traditional rgb pixel in, corresponding sub-pixel imaging technique is then reapplied, to this in the way of the mankind see image A little pixel is preferably arranged.Due to the resolution ratio of LCDs (Liquid Crystal Display, LCD) it is more next Higher, pixel is more and more finer, causes the aperture opening ratio of liquid crystal pixel more and more lower, in turn results in the decline of light transmission rate.Therefore The color pixels of RGBW tetra- design the appearance of display screen, solve the problems, such as that LCDs white picture light transmission rate is too low, reduce Power consumption, can play a part of energy-conserving and environment-protective.This is based on, RGBW is becoming widely adopted the flat panel Liquid Crystal in various sizes In display.
Specifically, the introducing of W sub-pixel can cause the relative scale of R, G, B sub-pixel to decline, and aperture opening ratio declines, so as to When the high saturation pictures such as R, G, B are shown, its brightness is substantially low relative to RGB display patterns.Further, since W sub-pixel Transmitance apparently higher than RGB sub-pixels, therefore when in a picture high saturation picture and white picture simultaneously in the presence of, by In the addition of W pixels so that the luminance difference of the two relative to simple RGB display devices away from significantly increasing.Just because of the above Two reasons, the problem of high saturation distortion just occurs.The brightness of high saturation picture and white picture can lead to Cross and be input to the conversion method of RGBW signal outputs to be controlled by rgb signal.
In order to improve penetrance or luminosity, RGBW display screens need to open W sub-pixel in a suitable case, will be bright Degree carries out gain.Brightness gain values (brightness that W sub-pixel shows) depend on the RGB data of input, algorithm in RGBW display screens The effect that the brightness or penetrance that difference is obtained is improved can have differences, and its impact to image quality is also different.Mesh Front is by saturation computation brightness gain values (Gain) using a kind of more algorithm：Saturation degree is lower, and Gain is bigger；Saturation degree Higher, Gain is less.Saturation degree S of the pixel that RGB is constituted is calculated, when S is less than certain value, Gain is equal to steady state value；Work as S During more than certain value, then Gain diminishes with S increases.The computational methods of S are S=(max (R, G, B)-min (R, G, B))/max (R,G,B).The method can be very good keep each pixel S values, while increase brightness, but can exist in overall picture More serious distortion phenomenon.
【The content of the invention】
It is an object of the invention to provide a kind of RGB turns the conversion method of RGBW, to solve prior art in high saturation The problem of picture color distortion.
Technical scheme is as follows：
A kind of RGB turns the conversion method of RGBW, comprises the following steps：
Obtain the grey decision-making of each pixel rgb signal of present frame picture；
The grey decision-making of each pixel rgb signal is converted into into brightness value, and the brightness value is normalized Process；
The yield value of each pixel after normalized is calculated, and counts the pixel that entire picture meets preset requirement The yield value of point, to obtain the integral distribution curve figure of entire picture pixel yield value；
One ordinate value of the integral distribution curve figure of receive user setting, and by the corresponding horizontal stroke of the ordinate value Coordinate value is used as frame yield value；
The output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it；
Wherein, the pixel for meeting preset requirement is pixel of the pixel yield value not for 0.
Preferably, the yield value of each pixel after normalized is calculated, is specifically included：
PG=0, (M2=0)；
PG=(1+WS)/M2, (M1/M2 >=WS/(1+WS)〕；
PG=1/ (M2-M1), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value of a pixel, WS=W/ (R+G+B), R, G, B and W are the brightness value of RGBW, and M2 is The maximum in brightness value rgb after the colors of RGB tri- normalization of one pixel, M1 is the color normalizings of RGB tri- of a pixel The minimum of a value in brightness value rgb after change.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, specifically Including：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, Rout、Gout、BoutWith WoutThe respectively output valve of RGBW, FG is a default frame yield value, and it is institute State the corresponding abscissa value of integral distribution curve figure.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, afterwards Also include：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentShow for the brightness after backlight adjustment, and entire picture Show that region is divided into multiple zoness of different, the backlight is carried out solely respectively according to preset rules to the brightness of the plurality of zones of different Vertical control.
Preferably, the yield value of each pixel after normalized is calculated, is specifically included：
PG=(1+WS), (M1/M2 >=WS/(1+WS) or M2=0)；
PG=min (1/ (M2-M1), (1+WS)), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value of a pixel, WS=W/ (R+G+B), R, G, B and W are the brightness value of RGBW, and M2 is The maximum in brightness value rgb after the colors of RGB tri- normalization of one pixel, M1 is the color normalizings of RGB tri- of a pixel The minimum of a value in brightness value rgb after change.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, specifically Including：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, Rout、Gout、BoutWith WoutThe respectively output valve of RGBW, FG is a default frame yield value, and it is institute State the corresponding abscissa value of integral distribution curve figure.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, afterwards Also include：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentShow for the brightness after backlight adjustment, and entire picture Show that region is divided into multiple zoness of different, the backlight is carried out solely respectively according to preset rules to the brightness of the plurality of zones of different Vertical control.
Preferably, the yield value of each pixel after normalized is calculated, is specifically included：
PG=1/M1,
Wherein, PG is the yield value of a pixel, and M1 is the brightness value after the colors of RGB tri- normalization of a pixel Minimum of a value in rgb.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, specifically Including：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, WS=W/ (R+G+B), R, G, B and W for RGBW brightness value, Rout、Gout、BoutWith WoutRespectively RGBW Output valve, FG be a default frame yield value, it is the corresponding abscissa value of the integral distribution curve figure.
Preferably, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it, afterwards Also include：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentShow for the brightness after backlight adjustment, and entire picture Show that region is divided into multiple zoness of different, the backlight is carried out solely respectively according to preset rules to the brightness of the plurality of zones of different Vertical control.
Beneficial effects of the present invention：
A kind of RGB of the present invention turns the conversion method of RGBW, by the way that the grey decision-making of the RGB input signals of each pixel is turned Brightness value is changed to, and the brightness value is normalized, draw the cumulative distribution curve figure of frame yield value, further according to default An ordinate value and corresponding abscissa value is obtained by the ordinate value, using the abscissa value as frame yield value, finally The output valve of RGBW is drawn according to the frame yield value and preset rules, while picture brightness is lifted, RGBW is also improved and is shown Show the cross-color problem occurred under pattern, improve the saturation degree of picture.
【Description of the drawings】
Fig. 1 turns the implementing procedure figure of the conversion method of RGBW for a kind of RGB of the embodiment of the present invention；
Fig. 2 is the integral distribution curve figure of the frame yield value of the embodiment of the present invention；
Fig. 3 is divided into different vertical and horizontal intersection regions for the active area of the embodiment of the present invention, by horizontal stroke To the schematic diagram that brightness of the LED with longitudinal direction respectively to the zones of different of the active area is independently controlled；
Fig. 4 controls the schematic diagram of the brightness of whole picture for the LED by active area side of prior art.
【Specific embodiment】
The explanation of following embodiment is the particular implementation implemented to illustrate the present invention may be used to reference to additional schema Example.The direction term that the present invention is previously mentioned, for example " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side " Deng being only the direction with reference to annexed drawings.Therefore, the direction term for using is to illustrate and understand the present invention, and is not used to Limit the present invention.In figure, the similar unit of structure is represented with identical label.
Embodiment one
Fig. 1 is refer to, Fig. 1 turns the implementing procedure figure of the conversion method of RGBW for a kind of RGB of the embodiment of the present invention, from figure 1 can see, a kind of RGB of the present invention turns the conversion method of RGBW, comprises the following steps：
Step S101：Obtain the grey decision-making of each pixel rgb signal of present frame picture.
Step S102：The grey decision-making of each pixel rgb signal is converted into into brightness value, and the brightness value is entered Row normalized.
Step S103：The yield value of each pixel after normalized is calculated, and counts entire picture and meet default The yield value of the pixel of requirement, to obtain the integral distribution curve figure of entire picture pixel yield value.
Wherein, before obtaining the integral distribution curve figure of entire picture pixel yield value, first according to each pixel PG obtains the distribution function figure of entire picture, and further according to the distribution function figure integral distribution curve figure is converted into, described to meet pre- If desired pixel is pixel of the pixel yield value not for 0, the i.e. pixel of PG ≠ 0.
In the present embodiment, the yield value of each pixel after normalized is calculated, is specifically included：
PG=0, (M2=0)；
PG=(1+WS)/M2, (M1/M2 >=WS/(1+WS)〕；
PG=1/ (M2-M1), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value (i.e. Pixel Gain) of a pixel, WS=W/ (R+G+B), R, G, B and W are The brightness value of RGBW, M2 is the maximum in the brightness value rgb after the colors of RGB tri- normalization of a pixel, and M1 is a picture The minimum of a value in brightness value rgb after the colors of RGB tri- normalization of vegetarian refreshments.The maximum of the brightness value after tri- normalization of r, g and b For 1, minimum of a value is 0.
Wherein, the distribution function figure of entire picture is obtained according to the PG of each pixel, detailed process is as follows：
By the PG values of each pixel according to from it is little to order be divided into different intervals, and calculate PG values respectively in respectively The number of individual interval pixel, and the percentage of the number of pixels of its shared entire picture, using PG values as abscissa, with institute Percentage is accounted for as ordinate, distribution function figure is made.
Step S104：One ordinate value of the integral distribution curve figure of receive user setting, and by the ordinate It is worth corresponding abscissa value as frame yield value.
Step S105：The output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it.
In the present embodiment, the output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and its is defeated Go out, specifically include：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, Rout、Gout、BoutWith WoutThe respectively output valve of RGBW, FG be a default frame yield value (i.e. Frame Gain), it is the corresponding abscissa value of the integral distribution curve figure, and min (PG, FG) is a pixel Yield value, i.e. yield value are reduced to FG values more than the PG primary systems one of the pixel of FG values, and yield value is less than the pixel of FG values PG carries out gain according to its corresponding yield value.
Step S106：Brightness according to the size of frame yield value to backlight is adjusted.
As shown in figure 3, Fig. 3 is divided into the different vertical and horizontal zones of intersection for the active area 20 of the present embodiment Domain, is that brightness of the LED 10 respectively to the zones of different of the active area 20 is carried out solely by horizontal and vertical backlight The schematic diagram of vertical control.In the present embodiment, the brightness to backlight is adjusted specially：
BLAdjustment=BL/FG,
Wherein, FG is default frame yield value, brightness when BL is backlight standard-sized sheet, BLAdjustmentBrightness after adjusting for backlight, And entire picture viewing area 20 is divided into multiple zoness of different, the backlight is according to preset rules respectively to the plurality of difference The brightness in region is independently controlled.So, just can relatively accurately according to the brightness needs of zones of different, come pair with its phase The brightness of corresponding LED 10 is adjusted.
As shown in figure 4, Fig. 4 controls whole picture for the LED 30 by the side of active area 40 of prior art Brightness schematic diagram, from fig. 4 it can be seen that this backlight design of prior art, its active area 40 can only be allowed Zone Full integrally brightens or dimmed, and cannot accomplish to be independently controlled the brightness in wherein certain region, thus cannot Accomplish the brightness needs according to zones of different, the brightness for carrying out pair LED corresponding with the region 30 is adjusted, so as to basis Need the brightness for adjusting zones of different respectively.
As shown in Fig. 2 integral distribution curve figures of the Fig. 2 for the frame yield value of the embodiment of the present invention.It can be observed from fig. 2 that X% is a default abscissa value, and in integral distribution curve figure, the corresponding abscissa value of X% values is K, and K values here are just It is a frame yield value that user sets as needed.When the yield value of a pixel is more than the K values, the increasing of the pixel Benefit value is substituted with K values, and when the yield value of a pixel is less than the K values, the yield value of the pixel is constant, is that its is original Value.So, even if yield value occurs in that the situation of distortion less than the pixel of K values, it is also possible to which control is within the scope of very little.
A kind of RGB of the present invention turns the conversion method of RGBW, by the way that the grey decision-making of the RGB input signals of each pixel is turned Brightness value is changed to, and the brightness value is normalized, draw the cumulative distribution curve figure of frame yield value, further according to default An ordinate value and corresponding abscissa value is obtained by the ordinate value, using the abscissa value as frame yield value, finally The output valve of RGBW is drawn according to the frame yield value and preset rules, while picture brightness is lifted, RGBW is also improved and is shown Show the cross-color problem occurred under pattern, improve the saturation degree of picture.In addition, brightness of the present invention to backlight is also carried out Adjustment, reduces the brightness of backlight, namely reduces power consumption.In addition, the present invention is by the way that active area 20 is divided into not The zones of different that same vertical and horizontal intersect, the LED 10 is according to preset rules respectively to the brightness of multiple zoness of different It is independently controlled, so just can relatively accurately according to the brightness needs of zones of different, next pair is corresponding with the region The brightness of LED 10 is adjusted.
Embodiment two
Most is identical for the present embodiment and embodiment, and difference is the computational methods of each pixel yield value PG It is different.
In the present embodiment, the yield value of each pixel after normalized is calculated, is specifically included：
PG=(1+WS), (M1/M2 >=WS/(1+WS) or M2=0)；
PG=min (1/ (M2-M1), (1+WS)), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value (i.e. Pixel Gain) of a pixel, WS=W/ (R+G+B), R, G, B and W are The brightness value of RGBW, M2 is the maximum in the brightness value rgb after the colors of RGB tri- normalization of a pixel, and M1 is a picture The minimum of a value in brightness value rgb after the colors of RGB tri- normalization of vegetarian refreshments.The maximum of the brightness value after tri- normalization of r, g and b For 1, minimum of a value is 0.
In addition, other parts are identical with embodiment one, and here is no longer described in detail.
A kind of RGB of the present invention turns the conversion method of RGBW, by the way that the grey decision-making of the RGB input signals of each pixel is turned Brightness value is changed to, and the brightness value is normalized, draw the cumulative distribution curve figure of frame yield value, further according to default An ordinate value and corresponding abscissa value is obtained by the ordinate value, using the abscissa value as frame yield value, finally The output valve of RGBW is drawn according to the frame yield value and preset rules, while picture brightness is lifted, RGBW is also improved and is shown Show the cross-color problem occurred under pattern, improve the saturation degree of picture.In addition, brightness of the present invention to backlight is also carried out Adjustment, reduces the brightness of backlight, namely reduces power consumption.In addition, the present invention is by the way that active area 20 is divided into not The zones of different that same vertical and horizontal intersect, the LED 10 is according to preset rules respectively to the brightness of multiple zoness of different It is independently controlled, so just can relatively accurately according to the brightness needs of zones of different, next pair is corresponding with the region The brightness of LED 10 is adjusted.
Embodiment three
Most is identical for the present embodiment and embodiment, and difference is the computational methods of each pixel yield value PG It is different.
In the present embodiment, the yield value of each pixel after normalized is calculated, is specifically included：
PG=1/M1,
Wherein, PG is the yield value of a pixel, and M1 is the brightness value after the colors of RGB tri- normalization of a pixel Minimum of a value in rgb.The maximum of the brightness value after tri- normalization of r, g and b is 1, and minimum of a value is 0.
In addition, other parts are identical with embodiment one, and here is no longer described in detail.
A kind of RGB of the present invention turns the conversion method of RGBW, by the way that the grey decision-making of the RGB input signals of each pixel is turned Brightness value is changed to, and the brightness value is normalized, draw the cumulative distribution curve figure of frame yield value, further according to default An ordinate value and corresponding abscissa value is obtained by the ordinate value, using the abscissa value as frame yield value, finally The output valve of RGBW is drawn according to the frame yield value and preset rules, while picture brightness is lifted, RGBW is also improved and is shown Show the cross-color problem occurred under pattern, improve the saturation degree of picture.In addition, brightness of the present invention to backlight is also carried out Adjustment, reduces the brightness of backlight, namely reduces power consumption.In addition, the present invention is by the way that active area 20 is divided into not The zones of different that same vertical and horizontal intersect, the LED 10 is according to preset rules respectively to the brightness of multiple zoness of different It is independently controlled, so just can relatively accurately according to the brightness needs of zones of different, next pair is corresponding with the region The brightness of LED 10 is adjusted.
In sum, although the present invention it is disclosed above with preferred embodiment, but above preferred embodiment and be not used to limit The system present invention, one of ordinary skill in the art without departing from the spirit and scope of the present invention, can make various changes and profit Adorn, therefore protection scope of the present invention is defined by the scope that claim is defined.

Claims (10)

1. a kind of RGB turns the conversion method of RGBW, it is characterised in that comprise the following steps：
Obtain the grey decision-making of each pixel rgb signal of present frame picture；
The grey decision-making of each pixel rgb signal is converted into into brightness value, and the brightness value is normalized；
The yield value of each pixel after normalized is calculated, and counts the pixel that entire picture meets preset requirement Yield value, to obtain the integral distribution curve figure of entire picture pixel yield value；
One ordinate value of the integral distribution curve figure of receive user setting, and by the corresponding abscissa of the ordinate value Value is used as frame yield value；
The output valve of RGBW is obtained respectively according to the frame yield value and preset rules, and is output it；
Wherein, the pixel for meeting preset requirement is pixel of the pixel yield value not for 0.
2. RGB according to claim 1 turns the conversion method of RGBW, it is characterised in that calculate every after normalized The yield value of individual pixel, specifically includes：
PG=0, (M2=0)；
PG=(1+WS)/M2, (M1/M2 >=WS/(1+WS)〕；
PG=1/ (M2-M1), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value of a pixel, WS=W/ (R+G+B), R, G, B and W are the brightness value of RGBW, and M2 is one The maximum in brightness value rgb after the colors of RGB tri- normalization of pixel, M1 is after the colors of RGB tri- normalization of a pixel Brightness value rgb in minimum of a value.
3. RGB according to claim 2 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, specifically include：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, Rout、Gout、BoutWith WoutThe respectively output valve of RGBW, FG is a default frame yield value, and it is described tired The corresponding abscissa value of product scatter chart.
4. RGB according to claim 3 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, also include afterwards：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentBrightness after adjusting for the backlight, and entire picture viewing area Domain is divided into multiple zoness of different, and the backlight carries out independent control to the brightness of the plurality of zones of different respectively according to preset rules System.
5. RGB according to claim 1 turns the conversion method of RGBW, it is characterised in that calculate every after normalized The yield value of individual pixel, specifically includes：
PG=(1+WS), (M1/M2 >=WS/(1+WS) or M2=0)；
PG=min (1/ (M2-M1), (1+WS)), (M1/M2<WS/(1+WS)〕；
Wherein, PG is the yield value of a pixel, WS=W/ (R+G+B), R, G, B and W are the brightness value of RGBW, and M2 is one The maximum in brightness value rgb after the colors of RGB tri- normalization of pixel, M1 is after the colors of RGB tri- normalization of a pixel Brightness value rgb in minimum of a value.
6. RGB according to claim 5 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, specifically include：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, Rout、Gout、BoutWith WoutThe respectively output valve of RGBW, FG is a default frame yield value, and it is described tired The corresponding abscissa value of product scatter chart.
7. RGB according to claim 6 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, also include afterwards：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentBrightness after adjusting for the backlight, and entire picture viewing area Domain is divided into multiple zoness of different, and the backlight carries out independent control to the brightness of the plurality of zones of different respectively according to preset rules System.
8. RGB according to claim 1 turns the conversion method of RGBW, it is characterised in that calculate every after normalized The yield value of individual pixel, specifically includes：
PG=1/M1,
Wherein, PG is the yield value of a pixel, and M1 is in the brightness value rgb after the colors of RGB tri- normalization of a pixel Minimum of a value.
9. RGB according to claim 8 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, specifically include：
Wout=min ((1+WS), min (PG, FG) * M1),
Rout=min (PG, FG) * r-Wout,
Gout=min (PG, FG) * g-Wout,
Bout=min (PG, FG) * b-Wout,
Wherein, WS=W/ (R+G+B), R, G, B and W for RGBW brightness value, Rout、Gout、BoutWith WoutThe respectively output of RGBW Value, FG is a default frame yield value, and it is the corresponding abscissa value of the integral distribution curve figure.
10. RGB according to claim 9 turns the conversion method of RGBW, it is characterised in that according to the frame yield value and in advance If rule obtains respectively the output valve of RGBW, and outputs it, also include afterwards：
Brightness according to the size of the frame yield value to backlight is adjusted, specially：
BLAdjustment=BL/FG；
Wherein, brightness when BL is the backlight standard-sized sheet, BLAdjustmentBrightness after adjusting for the backlight, and entire picture viewing area Domain is divided into multiple zoness of different, and the backlight carries out independent control to the brightness of the plurality of zones of different respectively according to preset rules System.
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