CN109215599B - 8-domain design method and system for improving color complexion visual angle performance of colored race - Google Patents

The invention provides an 8-domain design method and a system for improving the appearance of the complexion visual angle of a colored race, wherein the method comprises the steps of acquiring XYZ of WRGB of each voltage of a 4-domain main area pixel under each preset visual angle under the respective action of 256-order preset voltages; setting an area ratio and a voltage ratio for the 4-domain main area pixels and the 4-domain secondary area pixels; acquiring RGB gray scale values of the colored race complexion features, and calculating XYZ and Yxy of preset visual angles of the colored race complexion features RGB according to the RGB gray scale values of the colored race complexion features; calculating the difference value of the colored race complexion characteristics RGB front view and side view angle Yxy; and adjusting the area ratio and the voltage ratio set by the 4-domain main area pixels and the 4-domain secondary area pixels according to the relation between the difference value and the preset threshold value. According to the invention, the problem of poor visual angle performance of the colored race complexion RGB in the prior art is solved by setting the area ratio and the voltage ratio of the 4-domain main area pixels and the 4-domain sub-area pixels for the colored race complexion RGB of the 8-domain pixels.

8-domain design method and system for improving color complexion visual angle performance of colored race

Technical Field

The invention relates to the technical field of liquid crystal display, in particular to an 8-domain design method and system for improving the complexion visual angle performance of colored people.

Background

In the field of liquid crystal panel display, the VA display mode has obvious viewing angle problems such as large viewing angle color cast and white blush. Therefore, in view of the viewing angle problem of the VA display mode, 8domain pixel designs have been proposed to improve the viewing angle condition. The 8domain pixel design divides pixels into a main part and a sub part, different voltages and areas are respectively given to the main part and the sub part, so that the main part and the sub part display different gray scales, and the effect of improving the visual angle is achieved through spatial mixing. But the problem of large visual angle display difference still exists for people with different skin colors.

Disclosure of Invention

In order to solve the technical problems, the invention provides an 8-domain design method and system for improving the complexion visual angle expression of colored races.

The invention provides an 8-domain design method for improving the complexion visual angle performance of colored races, which comprises the following steps:

step S11, acquiring a WRGB tristimulus value XYZ of each voltage of a 4-domain main area pixel under each preset visual angle under the respective action of 256-order preset voltages, wherein the preset visual angles at least comprise a front visual angle and a side visual angle;

step S12, setting the first 8-domain pixels as 4-domain main area pixels and 4-domain secondary area pixels, and setting area ratios and voltage ratios for the 4-domain main area pixels and the 4-domain secondary area pixels respectively based on RGB gray scale values;

step S13, calculating the voltage and XYZ of WRGB of each gray scale of the first 8-domain pixel under the preset visual angle according to the voltage and XYZ of WRGB of each gray scale of the 4-domain pixel under the preset visual angle and the area ratio and the voltage ratio;

step S14, adjusting the first 8-domain pixel to form a second 8-domain pixel based on gamma of 2.2, calculating a brightness value of each gray scale of the second 8-domain pixel W at the preset viewing angle, and obtaining XYZ of each gray scale of RGB at the preset viewing angle according to the brightness value of each gray scale of the second 8-domain pixel W at the preset viewing angle;

step S15, performing white balance adjustment on the second 8-domain pixel to obtain a third 8-domain pixel, where a gray scale value of the second 8-domain pixel W has a first corresponding relationship with a gray scale value of R, a gray scale value of G, and a gray scale value of B, and a gray scale value of the third 8-domain pixel W has a second corresponding relationship with a gray scale value of R, a gray scale value of G, and a gray scale value of B;

step S16, obtaining RGB gray scale values of the color features of the colored races, and calculating XYZ of the RGB features of the colored races at the preset visual angle according to the RGB gray scale values of the color features of the colored races, the first corresponding relation and the second corresponding relation;

step S17, calculating Yxy of the color human skin color feature RGB under the preset visual angle according to XYZ of the color human skin color feature RGB under the preset visual angle, wherein x and y are color coordinate values;

step S18, calculating the difference value between Yxy of the colored race complexion feature RGB under the front view angle and Yxy of the colored race complexion feature RGB under the side view angle;

and step S19, adjusting the area ratio and the voltage division ratio which are respectively set for the 4-domain main area pixels and the 4-domain secondary area pixels based on the R, G, B gray-scale value according to the size relation between the difference value and the preset threshold value.

Further, step S13 specifically includes:

calculating a 4-domain main area pixel area coefficient and a 4-domain secondary area pixel area coefficient according to the area ratio;

calculating XYZ of WRGB of the 4-domain secondary region pixel corresponding to each gray scale of the 4-domain main region pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main region pixel at the preset visual angle and the voltage ratio;

taking the voltage of WRGB of each gray scale of the 4-domain main area pixel under the preset visual angle as the voltage of WRGB of the gray scale of the first 8-domain pixel under the preset visual angle;

and calculating XYZ of WRGB of each gray scale of the first 8-domain pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main area pixel at the preset visual angle, XYZ of WRGB of a pixel of a 4-domain secondary area corresponding to each gray scale of the 4-domain main area pixel at the preset visual angle, the 4-domain main area pixel area coefficient and the 4-domain secondary area pixel area coefficient.

Further, calculating the brightness value of each gray scale of the second 8-domain pixel W under the preset viewing angle specifically includes:

acquiring a brightness value of a 0 gray scale of a second 8-domain pixel W at the preset viewing angle according to XYZ of a 0 gray scale of a first 8-domain pixel at the preset viewing angle, and acquiring a brightness value of a 255 gray scale of the second 8-domain pixel W at the preset viewing angle according to XYZ of a preset gray scale of the first 8-domain pixel at the preset viewing angle;

Further, the calculating XYZ of the RGB features at the preset viewing angle according to the RGB gray-scale values, the first corresponding relationship and the second corresponding relationship specifically includes:

searching a first W gray scale value corresponding to the gray scale value of the colored race skin color characteristic R, a second W gray scale value corresponding to the gray scale value of the colored race skin color characteristic G and a third W gray scale value corresponding to the gray scale value of the colored race skin color characteristic B in a first corresponding relation according to the colored race skin color characteristic RGB gray scale value;

searching an R gray scale value corresponding to the first W gray scale value, a G gray scale value corresponding to the second W gray scale value and a B gray scale value corresponding to the third gray scale value in the second corresponding relation according to the first W gray scale value, the second W gray scale value and the third W gray scale value;

and calculating XYZ of the color human skin color feature RGB under the preset visual angle according to the R gray scale value corresponding to the first W gray scale value, the G gray scale value corresponding to the second W gray scale value, the B gray scale value corresponding to the third gray scale value and the XYZ value of each gray scale of RGB under the preset visual angle.

Further, step S17 specifically includes:

calculating x and y according to XYZ of the color features RGB of the colored race under the preset visual angle, wherein the x and the y are color coordinate values;

and obtaining Yxy of the color human skin color feature RGB under the preset visual angle according to the calculated x and Y and Y extracted from XYZ of the color human skin color feature RGB under the preset visual angle.

Further, step S19 specifically includes:

when the difference is larger than a preset threshold, adjusting an area ratio and a voltage ratio set for the 4-domain main area pixels and the 4-domain sub area pixels based on RGB, and repeating the steps S13 to S18, so that the difference is smaller than or equal to the preset threshold;

and when the difference value is smaller than a preset threshold value, no adjustment is made.

The invention provides an 8-domain design system for improving the visual angle performance of complexion of colored races, which comprises:

the device comprises an acquisition unit, a display unit and a control unit, wherein the acquisition unit is used for acquiring a WRGB tristimulus value XYZ of each voltage of a 4-domain main area pixel under each preset visual angle under the respective action of 256-order preset voltages, and the preset visual angles at least comprise a front visual angle and a side visual angle;

the setting unit is used for setting the first 8-domain pixels as 4-domain main area pixels and 4-domain secondary area pixels, and setting area ratios and voltage ratios for the 4-domain main area pixels and the 4-domain secondary area pixels respectively based on RGB gray-scale values;

the first calculating unit is used for calculating the voltage and XYZ of the WRGB of each gray scale of the first 8-domain pixel under the preset visual angle according to the voltage and XYZ of the WRGB of each gray scale of the 4-domain pixel under the preset visual angle and the area ratio and the voltage ratio;

a first adjusting unit, configured to adjust the first 8-domain pixel to form a second 8-domain pixel based on gamma of 2.2, calculate a luminance value of each gray scale of the second 8-domain pixel W at the preset viewing angle, and obtain XYZ of each gray scale of RGB at the preset viewing angle according to the luminance value of each gray scale of the second 8-domain pixel W at the preset viewing angle;

the second adjusting unit is used for performing white balance adjustment on the second 8-domain pixel to obtain a third 8-domain pixel, wherein the gray-scale value of the second 8-domain pixel W has a first corresponding relation with the gray-scale value of R, the gray-scale value of G and the gray-scale value of B, and the gray-scale value of the third 8-domain pixel W has a second corresponding relation with the gray-scale value of R, the gray-scale value of G and the gray-scale value of B;

the second calculation unit is used for acquiring the RGB gray scale value of the color character race skin color characteristic, and calculating XYZ of the color character race skin color characteristic RGB under the preset visual angle according to the RGB gray scale value of the color character race skin color characteristic, the first corresponding relation and the second corresponding relation;

the third calculating unit is used for calculating Yxy of the colored race skin color feature RGB under the preset visual angle according to XYZ of the preset visual angle of the colored race skin color feature RGB, wherein x and y are color coordinate values;

the fourth calculating unit is used for calculating the difference value of Yxy of the colored race complexion characteristics RGB under the front view angle and Yxy of the colored race complexion characteristics RGB under the side view angle;

and the third adjusting unit is used for adjusting the area ratio and the voltage ratio which are respectively set for the 4-domain main area pixels and the 4-domain secondary area pixels based on the R, G, B gray-scale value according to the size relation between the difference value and the preset threshold value.

Further, the first computing unit is specifically configured to:

calculating a 4-domain main area pixel area coefficient and a 4-domain secondary area pixel area coefficient according to the area ratio;

calculating XYZ of WRGB of the 4-domain secondary region pixel corresponding to each gray scale of the 4-domain main region pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main region pixel at the preset visual angle and the voltage ratio;

and calculating XYZ of WRGB of each gray scale of the first 8-domain pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main area pixel at the preset visual angle, XYZ of WRGB of a pixel of a 4-domain secondary area corresponding to each gray scale of the 4-domain main area pixel at the preset visual angle, the 4-domain main area pixel area coefficient and the 4-domain secondary area pixel area coefficient.

Further, the first adjusting unit is configured to:

acquiring a 0 gray scale brightness value of a second 8-domain pixel W at the preset angle according to the first 8-domain pixel 0 gray scale XYZ at the preset angle, and acquiring a 255 gray scale brightness value of the second 8-domain pixel W at the preset angle according to the first 8-domain pixel preset gray scale XYZ at the preset angle;

Further, the second calculation unit is configured to:

searching a first W gray scale value corresponding to the gray scale value of the colored race skin color characteristic R, a second W gray scale value corresponding to the gray scale value of the colored race skin color characteristic G and a third W gray scale value corresponding to the gray scale value of the colored race skin color characteristic B in a first corresponding relation according to the colored race skin color characteristic RGB gray scale value;

searching an R gray scale value corresponding to the first W gray scale value, a G gray scale value corresponding to the second W gray scale value and a B gray scale value corresponding to the third gray scale value in the second corresponding relation according to the first W gray scale value, the second W gray scale value and the third W gray scale value;

and calculating XYZ of the color human skin color feature RGB at the preset visual angle according to the R gray scale value corresponding to the first W gray scale value, the G gray scale value corresponding to the second W gray scale value, the B gray scale value corresponding to the third gray scale value and the XYZ of each gray scale of RGB at the preset visual angle.

The implementation of the invention has the following beneficial effects:

according to the invention, the appropriate voltage ratio and area ratio are set for the 4-domain main area pixels and the 4-domain partition pixels, so that the difference value between the front viewing angle Yxy and the side viewing angle Yxy of the RGB characteristic of the skin color of the colored human race is smaller than the preset threshold value on the basis of the 8-domain pixels by the 8-domain pixels, the appearance of the characteristic viewing angle of the skin color of the colored human race is better, and the problem of larger visual display difference of the human races with different skin colors caused by the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart of an 8-domain design method for improving the visual angle performance of the skin color of a colored person according to an embodiment of the present invention.

Fig. 2 is a flowchart of a method for calculating WRGB voltage and XYZ voltage of each gray level of a first 8-domain pixel at a preset viewing angle according to an embodiment of the present invention.

Fig. 3 is a structural diagram of an 8-domain design system for improving the viewing angle performance of the skin color of people according to an embodiment of the present invention.

Detailed Description

The core content of this patent is to adjust the set area ratio and the voltage division ratio based on the skin color RGB, and the specific implementation of this method will be further explained with reference to the drawings and the embodiments.

Embodiments of the 8-domain design method and system for improving the viewing angle performance of pigmented human skin color provided by the present invention will be described in detail below.

As shown in fig. 1, the present invention provides an 8domian design method for improving the visual angle performance of skin color of a colored race, which comprises:

step S11, under the respective action of 256-step preset voltages, acquiring tristimulus values XYZ of WRGB for each voltage of the 4-domain main region pixel at each preset viewing angle, where the preset viewing angles at least include a front viewing angle and a side viewing angle.

It should be noted that each voltage in the 256-level preset voltages corresponds to a different gray scale of W, R, G, B, each voltage also corresponds to a tristimulus value of W, R, G, B at a preset viewing angle, and W, R, G, B represents four colors of white, red, green, and blue, respectively; the angle of the front viewing angle is 90 degrees, and the angle of the side viewing angle may be 30 degrees, 45 degrees or 60 degrees, and in this embodiment, one or more angles of the side viewing angle may be selected.

It is further noted that for a 4-domain pixel or an 8-domain pixel with both parameters being determined, the voltage is determined W, R, G, B; in the case of voltage determination, XYZ at 90 degrees and 45 degrees are different, and it is easily understood that the XYZ at different angles are different, and the XYZ at different brightness is different.

Step S12 sets the first 8-domain pixels as 4-domain main region pixels and 4-domain sub region pixels, and sets an area ratio and a voltage ratio for the 4-domain main region pixels and the 4-domain sub region pixels, respectively, based on RGB.

It should be noted that the area ratio refers to an area ratio between the 4-domain main region pixel and the 4-domain sub region pixel, the voltage ratio refers to a voltage ratio between the 4-domain main region pixel and the 4-domain sub region pixel, and the gray scale value of R, G, B may be

Setting different area ratios and voltage ratios for the 4-domain main area pixels and the 4-domain secondary area pixels; for example, based on the area ratio 1 between the R, 4-domain main region pixels and the 4-domain sub region pixels: 2, but based on the G, the area ratio between the 4-domain main region pixels and the 4-domain sub region pixels is 1: 3.

step S13, calculating the voltage and XYZ of the WRGB of each gray scale of the first 8-domain pixel at the preset viewing angle according to the voltage and XYZ of each gray scale of the 4-domain pixel at the preset viewing angle, and the area ratio and the voltage ratio.

The process embodying step S13 is described in other embodiments,

step S14, adjusting the first 8-domain pixel to form a second 8-domain pixel based on gamma 2.2, calculating a brightness value of each gray scale of the second 8-domain pixel W at the preset viewing angle, and obtaining XYZ of each gray scale of RGB at the preset viewing angle according to the brightness value of each gray scale of the second 8-domain pixel W at the preset viewing angle.

Specifically, the luminance value of the 0 gray scale of the second 8-domain pixel W at the preset viewing angle is obtained according to the XYZ of the 0 gray scale of the first 8-domain pixel at the preset viewing angle, and the Y value in the XYZ of the 0 gray scale of the first 8-domain pixel at the preset viewing angle is the luminance value of the 0 gray scale of the second 8-domain pixel W at the preset viewing angle; acquiring a brightness value of 255 gray scales of the second 8-domain pixel W at the preset viewing angle according to XYZ of a preset gray scale of the first 8-domain pixel at the preset viewing angle, wherein a Y value in the XYZ of the preset gray scale of the first 8-domain pixel at the preset viewing angle is the brightness value of 255 gray scales of the second 8-domain pixel W at the preset viewing angle; here, the preset gray scale of the first 8-domain pixel at the preset viewing angle can be selected, and generally, gray scales with relatively larger values, such as 250, 251, 252, 253, 254, and 255, are adopted.

The purpose of the gamma 2.2 adjustment is to make the brightness more uniform and suitable for human eyes.

Obtaining XYZ of each gray scale of RGB under the preset viewing angle based on the same voltage from the brightness value of each gray scale of the second 8-domain pixel W under the preset viewing angle corresponds to XYZ of R, G, B and W, for example, the brightness of W is 0.133, then looking up a table 1, Y represents brightness, knowing that the corresponding voltage is V3 according to 0.133, further looking up a table 1 according to V3, obtaining XYZ under the same preset viewing angle of RGB as W, where the gray scales of RGB are determined by the voltage V3.

TABLE 1

And step S15, performing white balance adjustment on the second 8-domain pixel to obtain a third 8-domain pixel.

Specifically, the gray scale value of the second 8-domain pixel W has a first corresponding relationship with the gray scale value of R, the gray scale value of G, and the gray scale value of B, and the gray scale value of the third 8-domain pixel W has a second corresponding relationship with the gray scale value of R, the gray scale value of G, and the gray scale value of B.

On the other hand, the white balance is required to satisfy the adjustment of gamma 2.2, and the color coordinate values x and y corresponding to the other gradations W are equal to the color coordinate values x and y of the 255 gradations W, respectively.

Before the white balance adjustment is not performed, the gray scale value of W has a first correspondence relationship with the gray scale values of R, G, and B, and at this time, the gray scale value of W is equal to all of the gray scale values of R, G, and B, and for example, when the gray scale value of W is 255, the gray scale value of R is 255, the gray scale value of G is 255, and the gray scale value of B is 255.

After the white balance is performed, the gray scale value of W has a second corresponding relationship with the gray scale value of R, the gray scale value of G, and the gray scale value of B, and at this time, the gray scale value of W is not necessarily completely equal to the gray scale value of R, the gray scale value of G, and the gray scale value of B, which can be specifically referred to in table 2 below.

TABLE 2

In table 2, the 100 gray level W corresponds to the 101 gray levels R, 102 gray levels G and 103 gray levels B, and thus the first correspondence relationship is broken and the second correspondence relationship is formed.

And S16, obtaining RGB gray scale values of the colored race skin color features, and calculating XYZ of the colored race skin color features RGB at the preset visual angle according to the RGB gray scale values of the colored race skin color features, the first corresponding relation and the second corresponding relation.

It should be noted that, the RGB grayscale values of the color race skin color feature may be obtained by looking up a color race skin color feature RGB grayscale value feature table, or may be obtained by extracting RGB values of different areas of the color race on a picture by using matlab, and taking an average value.

Step S16 specifically includes:

searching a first W gray scale value corresponding to the gray scale value of the colored race skin color characteristic R, a second W gray scale value corresponding to the gray scale value of the colored race skin color characteristic G and a third W gray scale value corresponding to the gray scale value of the colored race skin color characteristic B in a first corresponding relation according to the colored race skin color characteristic RGB gray scale value;

searching an R gray scale value corresponding to the first W gray scale value, a G gray scale value corresponding to the second W gray scale value and a B gray scale value corresponding to the third gray scale value in the second corresponding relation according to the first W gray scale value, the second W gray scale value and the third W gray scale value;

and calculating XYZ of the colored race complexion feature RGB at the preset visual angle according to the R gray scale value corresponding to the first W gray scale value, the G gray scale value corresponding to the second W gray scale value, the B gray scale value corresponding to the third gray scale value and the XYZ value of each gray scale of RGB at the preset visual angle.

Assuming that the RGB gray scale values of the skin color features of the colored race are R100, G101 and B102, the RGB gray scale values are obtained according to the first corresponding relationship: the first W gray scale value is 100, the second W gray scale value is 101 and the third W gray scale value is 102; the second correspondence is shown in table 1, where the first W grayscale value is 100, and the corresponding R is 101; the second gray scale value is 101, and the corresponding G is 102; the third gray scale value is 102, corresponding to B being 106; XYZ per gray level of RGB at the preset viewing angle is obtained in step S14, where XYZ at R, G, B at the preset viewing angle is calculated from R101, G102 and B106, respectively, and XYZ of R, G and B at the same preset viewing angle is added to obtain XYZ of the feature RGB of the skin color of the colored person at the preset viewing angle.

And step S17, calculating Yxy of the colored race skin color feature RGB at the preset visual angle according to XYZ of the colored race skin color feature RGB at the preset visual angle.

Step S17 specifically includes:

calculating x and y according to XYZ of the color features RGB of the colored race under the preset visual angle, wherein the x and the y are color coordinate values;

and obtaining Yxy of the color human skin color feature RGB under the preset visual angle according to the calculated x and Y and Y extracted from XYZ of the color human skin color feature RGB under the preset visual angle.

It should be noted that x and y are also corresponding to the preset viewing angle, and the preset viewing angle X, Y, Z in the x and y calculation formula is the preset viewing angle of x and y.

And step S18, calculating the difference value between Yxy of the colored race complexion feature RGB in the front view angle and Yxy of the colored race complexion feature RGB in the side view angle.

Note that, here, Yxy is calculated for only one side view angle.

And step S19, adjusting the area ratio and the voltage division ratio which are respectively set for the 4-domain main area pixels and the 4-domain secondary area pixels based on R, G, B according to the size relation between the difference value and a preset threshold value.

Specifically, when the difference is greater than the preset threshold, adjusting an area ratio and a voltage ratio set for the 4-domain main region pixels and the 4-domain sub region pixels based on RGB, and repeating the steps S13 to S18 so that the difference is less than or equal to the preset threshold;

and when the difference value is smaller than a preset threshold value, no adjustment is made.

As shown in fig. 2, the present invention provides a method of calculating a WRGB voltage and XYZ voltage for each gray level of a first 8-domain pixel at a preset viewing angle, the method including:

and step S21, calculating a 4-domain main area pixel area coefficient and a 4-domain secondary area pixel area coefficient according to the area ratio.

Note that the area ratio is a ratio of the area of the 4-domain main region pixel to the area of the 4-domain sub region pixel, and is, for example, 1: 2, the 4-domain main region pixel area coefficient is 1/3, and the 4-domain sub region pixel area coefficient is 2/3.

Step S22, calculating XYZ of WRGB of the 4-domain sub-region pixels corresponding to each gray scale of the 4-domain main region pixels at the preset viewing angle according to the XYZ of the WRGB of each gray scale of the 4-domain pixels at the preset viewing angle and the voltage ratio.

It should be noted that, here, the 4-domain pixels at the preset viewing angle are actually 4-domain main area pixels, and XYZ of the 4-domain sub area pixels corresponding to each gray scale of the 4-domain main area pixels at the preset viewing angle can be calculated according to a voltage ratio between XYZ of WRGB of each gray scale of the 4-domain main area pixels at the preset viewing angle and XYZ of the 4-domain sub area pixels corresponding to each gray scale of the 4-domain main area pixels at the preset viewing angle.

Step S23, taking the voltage of WRGB of each gray scale of the 4-domain pixel at the preset viewing angle as the voltage of WRGB of the gray scale of the first 8-domain pixel at the preset viewing angle.

Step S24, calculating XYZ of WRGB of each gray scale of the first 8-domain pixel at the preset viewing angle according to XYZ of WRGB of each gray scale of the 4-domain pixel at the preset viewing angle, XYZ of WRGB of a 4-domain sub-region pixel corresponding to each gray scale of the 4-domain main region pixel at the preset viewing angle, an area coefficient of the 4-domain main region pixel, and an area coefficient of the 4-domain sub-region pixel.

Note that XYZ for each gray scale of the first 8-domain pixel at the preset viewing angle can be obtained according to the formula (XYZ × 4-domain main region pixel area coefficient of WRGB for each gray scale of the 4-domain main region pixel at the preset viewing angle) + (XYZ × 4-domain sub region pixel area coefficient of WRGB for each gray scale of the 4-domain sub region pixel corresponding to each gray scale of the 4-domain main region pixel at the preset viewing angle).

As shown in fig. 3, the present invention provides an 8-domain design system for improving the viewing angle performance of skin color of people with color, the system comprising:

calculating a 4-domain main area pixel area coefficient and a 4-domain secondary area pixel area coefficient according to the area ratio; calculating XYZ of WRGB of the 4-domain secondary region pixel corresponding to each gray scale of the 4-domain main region pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main region pixel at the preset visual angle and the voltage ratio;

taking the voltage of WRGB of each gray scale of the 4-domain main area pixel under the preset visual angle as the voltage of WRGB of the gray scale of the first 8-domain pixel under the preset visual angle;

and calculating XYZ of WRGB of each gray scale of the first 8-domain pixel at the preset visual angle according to XYZ of WRGB of each gray scale of the 4-domain main area pixel at the preset visual angle, XYZ of WRGB of a pixel of a 4-domain secondary area corresponding to each gray scale of the 4-domain main area pixel at the preset visual angle, the 4-domain main area pixel area coefficient and the 4-domain secondary area pixel area coefficient.

acquiring a 0 gray scale brightness value of a second 8-domain pixel W at the preset angle according to the XYZ of the 0 gray scale of the first 8-domain pixel at the preset angle, and acquiring a 255 gray scale brightness value of the second 8-domain pixel W at the preset angle according to the XYZ of the preset gray scale of the first 8-domain pixel at the preset angle;

searching a first W gray scale value corresponding to the gray scale value of the colored race skin color characteristic R, a second W gray scale value corresponding to the gray scale value of the colored race skin color characteristic G and a third W gray scale value corresponding to the gray scale value of the colored race skin color characteristic B in a first corresponding relation according to the colored race skin color characteristic RGB gray scale value;

searching an R gray scale value corresponding to the first W gray scale value, a G gray scale value corresponding to the second W gray scale value and a B gray scale value corresponding to the third gray scale value in the second corresponding relation according to the first W gray scale value, the second W gray scale value and the third W gray scale value;

and calculating XYZ of the color human skin color feature RGB at the preset visual angle according to the R gray scale value corresponding to the first W gray scale value, the G gray scale value corresponding to the second W gray scale value, the B gray scale value corresponding to the third gray scale value and the XYZ of each gray scale of RGB at the preset visual angle.

The implementation of the invention has the following beneficial effects:

according to the invention, the appropriate voltage ratio and area ratio are set for the 4-domain main area pixels and the 4-domain partition pixels, so that the difference value between the front viewing angle Yxy and the side viewing angle Yxy of the RGB characteristic of the skin color of the colored human race is smaller than the preset threshold value on the basis of the 8-domain pixels by the 8-domain pixels, the appearance of the characteristic viewing angle of the skin color of the colored human race is better, and the problem of larger visual display difference of the human races with different skin colors caused by the prior art is solved.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.