CN104867471B - A kind of RGB turns the method, apparatus and RGBW display equipment of RGBW - Google Patents
A kind of RGB turns the method, apparatus and RGBW display equipment of RGBW Download PDFInfo
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Abstract
The present invention is suitable for display technology field, provides that a kind of RGB turns the method, apparatus of RGBW and RGBW shows equipment, the method includes：The theoretical backlight value of current pixel is calculated according to the intensity value of current pixel, the theory backlight value increases with the increase of the intensity value；According to the practical backlight value of the mean value calculation current pixel of the intensity value of the 4 of current pixel adjacent domains, the practical backlight value increases with the increase of the average value of the intensity value；According to the theoretical gain of current pixel and the actual gain of the theoretical backlight value and the ratio calculation current pixel of the practical backlight value；The RGBW component values of current pixel are calculated according to the minimum value in the actual gain, the RGB component value of current pixel and the RGB component value.The present invention will not cause the brightness of the heavy shade of display relatively low compared to the brightness of the whole white of display, the problem of feeling saturation colour cast dark effect to human eye occur.
Description
Technical field
Turn the method, apparatus of RGBW the invention belongs to display technology field more particularly to a kind of RGB and RGBW shows and sets
It is standby.
Background technology
Currently, since the resolution ratio of liquid crystal display (Liquid Crystal Display, LCD) is higher and higher, pixel
It is increasingly finer, cause the aperture opening ratio of liquid crystal pixel higher and higher, therefore four colours of RGBW (Red+Green+Blue+White)
The appearance of element design display screen, solves the problems, such as that liquid crystal display aperture opening ratio is too low.
In LCD pixel arrangement based on RGBW structures, a sub-pixel only accounts for the 1/4 of a pixel, what is be displayed in white
When, tetra- sub-pixels of RGBW are all lighted, and when showing heavy shade, for example, when being displayed in red, only red sub-pixel point
It is bright, it is assumed that red sub-pixel brightness is 0.3, green sub-pixels brightness is 0.6, blue sub-pixel luminence 0.1, white sub-pixels
Brightness is 1, then when being displayed in red and being displayed in white, the ratio of red sub-pixel brightness and white sub-pixels brightness is 0.3:2；And
For the arrangement of the LCD pixel of RGB structures, when being displayed in red and being displayed in white, red sub-pixel brightness and white sub-pixels
The ratio of brightness is 0.3:1, therefore when a picture exists simultaneously heavy shade and white, the LCD pixel arrangement of RGBW structures
LCD pixel compared to RGB structures is arranged, and the ratio brightness ratio of heavy shade sub-pixel luminence and white sub-pixels brightness can be lost
Weighing apparatus causes the brightness of the heavy shade of display relatively low compared to the brightness of the whole white of display, feels the dark effect of saturation colour cast to human eye
Fruit.
Invention content
Turn the method, apparatus of RGBW an embodiment of the present invention provides a kind of RGB and RGBW shows equipment, it is intended to solve existing
The RGB that technology provides turns RGBW methods, and the brightness of the heavy shade of display can be caused relatively low compared to the brightness of the whole white of display, gone out
The problem of now feeling saturation colour cast dark effect to human eye.
On the one hand, a kind of RGB method for turning RGBW is provided, the method includes：
The theoretical backlight value of current pixel is calculated according to the intensity value of current pixel, the theory backlight value is with described full
Increase with angle value and increase；
According to the practical backlight value of the mean value calculation current pixel of the intensity value of the 4 of current pixel adjacent domains,
The practical backlight value increases with the increase of the average value of the intensity value；
Worked as according to the ratio calculation of the theoretical gain of current pixel and the theoretical backlight value and the practical backlight value
The actual gain of preceding pixel；
According to the minimum value meter in the actual gain, R, G of current pixel, B component value and the R, G, B component value
Calculate R, G, B, W component value of current pixel.
Further, the theoretical backlight value that current pixel is calculated according to the intensity value of current pixel, including：
The intensity value S of current pixel is calculated by formula 1：
The theoretical backlight value BL_t of current pixel is calculated by formula 2：
Wherein, min=Min (R, G, B), max=Max (R, G, B).
Further, the mean value calculation current pixel of the intensity value of 4 adjacent domains according to current pixel
Practical backlight value, including：
RGBW display screens are divided into N*M region；
Pass through the average value of the intensity value of the pixel in formula 3 zoning k, k+1, k+2 and k+3 WithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are 4 proximities of current pixel respectively
Domain：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the number of the pixel in the p of region
Amount；
Pass through the theoretical backlight value BL of formula 4 zoning k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
According to current pixel and the region center k, k+1, k+2 and k+3 distance k1, k2, k3 and k4 and region k, k+1, k
The theoretical backlight value BL of+2 and k+3k、BLk+1、BLk+2、BLk+3Calculate the practical backlight value of current pixel.
Further, according to current pixel and the region center k, k+1, k+2 and k+3 distance k1, k2, k3 and k4 and area
The theoretical backlight value BL of domain k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3The practical backlight value of current pixel is calculated, including：
Meet formula 5 between setting k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
The theoretical backlight value BL of current pixel is calculated according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3)*(1-k1)
Formula 6.
On the other hand, a kind of RGB device for turning RGBW is provided, described device includes：
First backlight value computing unit, the theoretical backlight for calculating current pixel according to the intensity value of current pixel
Value, the theory backlight value increase with the increase of the intensity value；
Second backlight value computing unit, based on the average value according to the intensity value of 4 adjacent domains of current pixel
The practical backlight value of current pixel is calculated, the practical backlight value increases with the increase of the average value of the intensity value；
Actual gain computing unit, for according to the theoretical gain of current pixel and the theoretical backlight value and the reality
The actual gain of the ratio calculation current pixel of border backlight value；
RGBW component value computing units, for according to the actual gain, R, G of current pixel, B component value and described
R, the minimum value in G, B component value calculates R, G, B, W component value of current pixel.
Further, the first backlight value computing unit, including：
Intensity value S computing modules, the intensity value S for calculating current pixel by formula 1：
Theoretical backlight value computing module, the theoretical backlight value BL_t for calculating current pixel by formula 2：
Wherein, min=Min (R, G, B), max=Max (R, G, B).
Further, the second backlight value computing unit, including：
Region division module, for RGBW display screens to be divided into N*M region；
Saturation degree mean value calculation module, for passing through the full of the pixel in formula 3 zoning k, k+1, k+2 and k+3
With the average value of angle valueWithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are respectively
4 adjacent domains of current pixel：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the number of the pixel in the p of region
Amount；
Neighboring regions backlight value computing module, for the theoretical backlight by formula 4 zoning k, k+1, k+2 and k+3
Value BLk、BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
The practical backlight value computing module of current pixel, for according to current pixel and the region center k, k+1, k+2 and k+3
The theoretical backlight value BL of distance k1, k2, k3 and k4 and region k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3It calculates current
The practical backlight value of pixel.
Further, the practical backlight value computing module of the current pixel, including：
Distance setting submodule, meets formula 5 for being arranged between k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
Practical backlight value computational submodule, the practical backlight value BL for calculating current pixel according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3)*(1-k1)
Formula 6.
Another aspect, provides a kind of RGBW displays equipment, and the RGBW shows that equipment includes that RGB as described above turns RGBW
Device.
In the embodiment of the present invention, when the RGB component value of current pixel is switched to RGBW component values, the reality of current pixel
Backlight value increases with the increase of the average value of the intensity value of pixel in region.Finally, the intensity value of current pixel
The backlight brightness values of Gao Shi, current pixel can improve；When the intensity value of current pixel is low, the backlight brightness values meeting of current pixel
It reduces, it compared with prior art, can be according to the backlight of the adaptive adjustment current pixel of the height of the intensity value of current pixel
The height of value, solve the prior art offer RGB turn RGBW methods can cause display heavy shade brightness compared to display
The brightness of whole white is relatively low, the problem of feeling saturation colour cast dark effect to human eye occurs.
Description of the drawings
Fig. 1 is the implementation flow chart for the method that the RGB that the embodiment of the present invention one provides turns RGBW；
Fig. 2 is divided, is obtained to RGBW display screens in the method that the RGB that the embodiment of the present invention one provides turns RGBW
N*M region schematic diagram；
Fig. 3 is that the RGB that the embodiment of the present invention one provides turns in the method for RGBW, and current pixel A adjacent thereto 4 is neighbouring
The position view in region；
Fig. 4 is the structure diagram for the device that RGB provided by Embodiment 2 of the present invention turns RGBW.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In embodiments of the present invention, the theoretical backlight value of current pixel, institute are first calculated according to the intensity value of current pixel
Theoretical backlight value is stated with the increase of the intensity value to increase；Further according to the intensity value of 4 adjacent domains of current pixel
Mean value calculation current pixel practical backlight value, the practical backlight value with the increase of the average value of the intensity value and
Increase；Then worked as according to the ratio calculation of the theoretical gain of current pixel and the theoretical backlight value and the practical backlight value
The actual gain of preceding pixel；Finally according to the actual gain, R, G of current pixel, B component value and the R, G, B component
Minimum value in value calculates R, G, B, W component value of current pixel.
The realization of the present invention is described in detail below in conjunction with specific embodiment：
Embodiment one
Fig. 1 shows that the RGB that the embodiment of the present invention one provides turns the implementation process of the method for RGBW, and details are as follows：
In step S101, the theoretical backlight value of current pixel, the theory are calculated according to the intensity value of current pixel
Backlight value increases with the increase of the intensity value.
In embodiments of the present invention, R, G of current pixel, the minimum value of B component value are indicated with min, i.e. min=Min (R,
G, B), indicate R, G of current pixel, the maximum value of B component value with max, i.e. max=Max (R, G, B) then can be with by formula 1
The intensity value S of current pixel is calculated：
The theoretical backlight value of current pixel increases with the increase of the intensity value of current pixel, specifically, according to formula 2
The theoretical backlight value BL_t of current pixel can be calculated：
In step s 102, according to the mean value calculation current pixel of the intensity value of the 4 of current pixel adjacent domains
Practical backlight value, the practical backlight value increases with the increase of the average value of the intensity value.
In embodiments of the present invention, the practical backlight value of current pixel can be calculated by following steps：
RGBW display screens are divided into N*M region by step 1；
Step 2, the average value by the intensity value of the pixel in formula 3 zoning k, k+1, k+2 and k+3WithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are 4 of current pixel respectively
Adjacent domain：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the number of the pixel in the p of region
Amount；
Step 3 passes through the theoretical backlight value BL of formula 4 zoning k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
Step 4, according to current pixel and the region center k, k+1, k+2 and k+3 distance k1, k2, k3 and k4 and region
K, the theoretical backlight value BL of k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3Calculate the practical backlight value of current pixel.
Specifically, as shown in Fig. 2, RGBW display screens can be divided into N*M region.
As shown in figure 3, being calculated respectively according to formula 3 again in 4 adjacent domains BL1, BL2, BL3 and BL4 of current pixel A
Pixel saturation degree average value, the average value of the saturation degree of the pixel in region BL1, BL2, BL3 and BL4 is calculated
Afterwards, according to theoretical backlight value BL1, BL2, BL3 and BL4 of formula 4 zoning BL1, BL2, BL3 and BL4, finally according to region
Theoretical backlight value BL1, BL2, BL3 and BL4 and current pixel A and region BL1, BL2, BL3 of BL1, BL2, BL3 and BL4 and
The practical backlight value BL of current pixel A is calculated using bilinear interpolation filter method for the distance at the centers BL4.
Specifically, according to current pixel and the region center k, k+1, k+2 and k+3 distance k1, k2, k3 and k4 and region
K, the theoretical backlight value BL of k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3When calculating the practical backlight value of current pixel, first it is arranged
Meet formula 5 between k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
The practical backlight value BL of current pixel is calculated further according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3)*(1-k1)
Formula 6.
In step s 103, according to the theoretical gain of current pixel and the theoretical backlight value and the practical backlight value
Ratio calculation current pixel actual gain.
In embodiments of the present invention, according to the theoretical backlight value BL_t and step of the step S101 current pixels being calculated
The practical backlight value BL for the current pixel that S102 is calculated obtains design factor Coeff, Coeff=BL_t/BL, if
Coeff>1, then Coeff=1 is set.
Further according to the design factor and the theoretical gain Gain of current pixel, the practical increasing of current pixel is calculated
Beneficial Gain_f, Gain_f=Coeff*Gain=Coeff*Gain.
In step S104, according to the actual gain, R, G of current pixel, B component value and the R, G, B component
Minimum value in value calculates R, G, B, W component value of current pixel.
In embodiments of the present invention, according to the actual gain Gain_f of the step S103 current pixels being calculated, current
R, G, B, W component value of R, G, B component value and the R, G of pixel, the minimum value min calculating current pixels in B component value.
Specifically, R, G, B, W component value of current pixel are as follows：
W=min；
R=Gain_f*R-W；
G=Gain_f*G-W；
B=Gain_f*B-W.
The present embodiment, when the RGB component value of current pixel is switched to RGBW component values, the practical backlight value of current pixel
Increase with the increase of the average value of the intensity value of pixel in region.Finally, when the intensity value of current pixel is high, when
The backlight brightness values of preceding pixel can improve；When the intensity value of current pixel is low, the backlight brightness values of current pixel can be reduced, phase
It, can be according to the height of the backlight value of the adaptive adjustment current pixel of the height of the intensity value of current pixel than the prior art
Low, the RGB for solving prior art offer turns RGBW methods, and the brightness of the heavy shade of display can be caused compared to the whole white of display
Brightness it is relatively low, there is the problem of feeling saturation colour cast dark effect to human eye.It ensure that RGBW shows that the image of equipment is bright-coloured
Degree.Increase the market competitiveness that RGBW shows equipment.
One of ordinary skill in the art will appreciate that all or part of step in realization the various embodiments described above method is can
It is completed with instructing relevant hardware by program, corresponding program can be stored in a computer read/write memory medium
In, the storage medium, such as ROM/RAM, disk or CD.
Embodiment two
Fig. 4 shows that RGB provided by Embodiment 2 of the present invention turns the concrete structure block diagram of the device of RGBW, for the ease of saying
It is bright, it illustrates only and the relevant part of the embodiment of the present invention.The device that the RGB turns RGBW can be built in RGBW to show equipment
In software unit, hardware cell or software and hardware combining unit, the device 4 which turns RGBW includes：First backlight value meter
Calculate unit 41, the second backlight value computing unit 42, actual gain computing unit 43 and RGBW component values computing unit 44.
Wherein, the first backlight value computing unit 41, the reason for calculating current pixel according to the intensity value of current pixel
By backlight value, the theory backlight value increases with the increase of the intensity value；
Second backlight value computing unit 42 is used for the average value of the intensity value of 4 adjacent domains according to current pixel
The practical backlight value of current pixel is calculated, the practical backlight value increases with the increase of the average value of the intensity value；
Actual gain computing unit 43, for according to the theoretical gain of current pixel and the theoretical backlight value with it is described
The actual gain of the ratio calculation current pixel of practical backlight value；
RGBW component values computing unit 44, for according to the actual gain, R, G of current pixel, B component value and institute
State R, G, B, W component value that the minimum value in R, G, B component value calculates current pixel.
Specifically, the first backlight value computing unit 41, including：
Intensity value S computing modules, the intensity value S for calculating current pixel by formula 1：
Theoretical backlight value computing module, the theoretical backlight value BL_t for calculating current pixel by formula 2：
Wherein, min=Min (R, G, B), max=Max (R, G, B).
Specifically, the second backlight value computing unit 42, including：
Region division module, for RGBW display screens to be divided into N*M region；
Saturation degree mean value calculation module, for passing through the full of the pixel in formula 3 zoning k, k+1, k+2 and k+3
With the average value of angle valueWithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are respectively
4 adjacent domains of current pixel：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the number of the pixel in the p of region
Amount；
Neighboring regions backlight value computing module, for the theoretical backlight by formula 4 zoning k, k+1, k+2 and k+3
Value BLk、BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
The practical backlight value computing module of current pixel, for according to current pixel and the region center k, k+1, k+2 and k+3
The theoretical backlight value BL of distance k1, k2, k3 and k4 and region k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3It calculates current
The practical backlight value of pixel.
Specifically, the practical backlight value computing module of current pixel, including：
Distance setting submodule, meets formula 5 for being arranged between k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
Practical backlight value computational submodule, the practical backlight value BL for calculating current pixel according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3)*(1-k1)
Formula 6.
The device that RGB provided in an embodiment of the present invention turns RGBW can be applied in aforementioned corresponding embodiment of the method one,
Details are referring to the description of above-described embodiment one, and details are not described herein.
It is worth noting that, in above-mentioned apparatus embodiment, included each unit is only drawn according to function logic
Point, but it is not limited to above-mentioned division, as long as corresponding function can be realized；In addition, each functional unit is specific
Title is also only to facilitate mutually distinguish, the protection domain being not intended to restrict the invention.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. a kind of method that RGB turns RGBW, which is characterized in that the method includes：
The theoretical backlight value of current pixel is calculated according to the intensity value of current pixel, the theory backlight value is with the saturation degree
The increase of value and increase；
It is described according to the practical backlight value of the mean value calculation current pixel of the intensity value of the 4 of current pixel adjacent domains
Practical backlight value increases with the increase of the average value of the intensity value；
According to the current picture of ratio calculation of the theoretical gain of current pixel and the theoretical backlight value and the practical backlight value
The actual gain of element；
Worked as according to the minimum value calculating in the actual gain, R, G of current pixel, B component value and the R, G, B component value
R, G, B, W component value of preceding pixel；Wherein, R, G, B, W component value of current pixel are specially：
W=min；
R_f=Gain_f*R-W；
G_f=Gain_f*G-W；
B_f=Gain_f*B-W；
Wherein, the R is the component value of red channel before adjustment；The G is the component value of green channel before adjustment；The B is
The component value of blue channel before adjustment；The R_f is the component value of current red channel；The G_f is current green channel
Component value；The B_f is the component value of current blue channel；The W is the component value in current white channel；The Gain_f is
Actual gain；Min=Min (R, G, B).
2. the method that RGB as described in claim 1 turns RGBW, which is characterized in that the intensity value according to current pixel
The theoretical backlight value of current pixel is calculated, including：
The intensity value S of current pixel is calculated by formula 1：
The theoretical backlight value BL_t of current pixel is calculated by formula 2：
Wherein, min=Min (R, G, B), max=Max (R, G, B).
3. the method that RGB as claimed in claim 1 or 2 turns RGBW, which is characterized in that 4 neighbours according to current pixel
The practical backlight value of the mean value calculation current pixel of the intensity value of near field, including：
RGBW display screens are divided into N*M region；
Pass through the average value of the intensity value of the pixel in formula 3 zoning k, k+1, k+2 and k+3 WithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are 4 proximities of current pixel respectively
Domain：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the quantity of the pixel in the p of region；
Pass through the theoretical backlight value BL of formula 4 zoning k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
According to current pixel and the region center k, k+1, k+2 and k+3 distance k1, k2, k3 and k4 and region k, k+1, k+2 and
The theoretical backlight value BL of k+3k、BLk+1、BLk+2、BLk+3Calculate the practical backlight value of current pixel.
4. the method that RGB as claimed in claim 3 turns RGBW, which is characterized in that according to current pixel and region k, k+1, k+2
And distance k1, k2, k3 and the k4 at the centers k+3 and the theoretical backlight value BL of region k, k+1, k+2 and k+3k、BLk+1、BLk+2、
BLk+3The practical backlight value of current pixel is calculated, including：
Meet formula 5 between setting k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
The theoretical backlight value BL of current pixel is calculated according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3) * (1-k1) formula
6。
5. a kind of RGB turns the device of RGBW, which is characterized in that described device includes：
First backlight value computing unit, the theoretical backlight value for calculating current pixel according to the intensity value of current pixel, institute
Theoretical backlight value is stated with the increase of the intensity value to increase；
Second backlight value computing unit, the mean value calculation for the intensity value according to 4 adjacent domains of current pixel are worked as
The practical backlight value of preceding pixel, the practical backlight value increase with the increase of the average value of the intensity value；
Actual gain computing unit, for according to the theoretical gain of current pixel and the theoretical backlight value and the practical back of the body
The actual gain of the ratio calculation current pixel of light value；
RGBW component value computing units, for according to the actual gain, R, G of current pixel, B component value and the R, G,
Minimum value in B component value calculates R, G, B, W component value of current pixel；Wherein, R, G, B, W component value of current pixel are specific
For：
W=min；
R_f=Gain_f*R-W；
G_f=Gain_f*G-W；
B_f=Gain_f*B-W；
Wherein, the R is the component value of red channel before adjustment；The G is the component value of green channel before adjustment；The B is
The component value of blue channel before adjustment；The R_f is the component value of current red channel；The G_f is current green channel
Component value；The B_f is the component value of current blue channel；The W is the component value in current white channel；The Gain_f is
Actual gain；Min=Min (R, G, B).
6. RGB as claimed in claim 5 turns the device of RGBW, which is characterized in that the first backlight value computing unit, packet
It includes：
Intensity value S computing modules, the intensity value S for calculating current pixel by formula 1：
Theoretical backlight value computing module, the theoretical backlight value BL_t for calculating current pixel by formula 2：
Wherein, min=Min (R, G, B), max=Max (R, G, B).
7. as RGB described in claim 5 or 6 turns the device of RGBW, which is characterized in that the second backlight value computing unit,
Including：
Region division module, for RGBW display screens to be divided into N*M region；
Saturation degree mean value calculation module, for the saturation degree by the pixel in formula 3 zoning k, k+1, k+2 and k+3
The average value of valueWithK is more than or equal to 1, and region k, k+1, k+2 and k+3 are current respectively
4 adjacent domains of pixel：
Wherein, ∑ SpFor the sum of the intensity value of pixel in the p of region, pixel_sumpFor the quantity of the pixel in the p of region；
Neighboring regions backlight value computing module, for the theoretical backlight value BL by formula 4 zoning k, k+1, k+2 and k+3k、
BLk+1、BLk+2、BLk+3：
Wherein, p is more than or equal to 1 and is less than or equal to N*M；
The practical backlight value computing module of current pixel is used for according to current pixel at a distance from the center k, k+1, k+2 and k+3 of region
The theoretical backlight value BL of k1, k2, k3 and k4 and region k, k+1, k+2 and k+3k、BLk+1、BLk+2、BLk+3Calculate current pixel
Practical backlight value.
8. RGB as claimed in claim 7 turns the device of RGBW, which is characterized in that the practical backlight value of current pixel calculates
Module, including：
Distance setting submodule, meets formula 5 for being arranged between k1, k2, k3 and k4：
K1+k2=1, k3+k4=1 formula 5
Practical backlight value computational submodule, the practical backlight value BL for calculating current pixel according to formula 6：
BL=((1-k3) * BLk+(1-k4)*BLk+1)*(1-k2)+((1-k3)*BLk+2+(1-k4)*BLk+3) * (1-k1) formula 6.
9. a kind of RGBW shows equipment, which is characterized in that the RGBW shows that equipment includes such as any one of claim 5 to 8 institute
The RGB stated turns the device of RGBW.
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| US10497321B2 (en) | 2017-10-31 | 2019-12-03 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Image processing method and device thereof |
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| CN109410874B (en) * | 2018-12-17 | 2021-04-23 | 惠科股份有限公司 | Method and device for converting three-color data into four-color data |
| CN110264972B (en) * | 2019-06-26 | 2021-08-17 | 京东方科技集团股份有限公司 | Method for obtaining brightness compensation value, computer device and computer readable medium |
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