CN104637465A - Method and system for locally compensating brightness and chrominance of display equipment - Google Patents

Abstract

The invention provides a method and a system for locally compensating the brightness and the chrominance of display equipment. The method comprises the following steps of selecting a plurality of pixel points of the display equipment as specified points, adjusting the brightness reference value Z of four colors RGBW (red, green, blue and white) of each specified point, and calculating to obtain a target brightness reference value of each color according to the brightness reference value ZR1, the brightness reference value ZG1, the brightness reference value ZB1 and the brightness reference value ZW1 which are obtained through adjustment; according to the target brightness reference value of each color of RGB (red, green and blue), the maximum value and the minimum value of the semaphore of each color, and the maximum value and the minimum value of the target brightness reference value of each color, calculating to obtain the semaphore corresponding to each color of the RGB of the specified points; according to the semaphores of the RGB of the specified points, calculating through an interpolation algorithm to obtain the corresponding semaphore of each pixel point of the display equipment. Due to the fact that when uniformity adjustment is performed during local brightness and chrominance compensation by only adjusting the size of the brightness reference value Z of the pixel points, the uniformity correction operation on the display equipment is relatively simple.

Description

Display device local bright chroma compensation method and system

Technical field

The present invention relates to display device display technique field, particularly relate to the local bright chroma compensation method of a kind of display device and display device local bright chroma bucking-out system.

Background technology

The application of current display device is extremely extensive, comprises hand-held, individual uses the kinds such as terminal, also can use different size and dissimilar display device on a large scale in occasions such as public exhibition, performances simultaneously.The part that when display effect of display device is actual use, people are the most deeply concerned, and the brightness of display device and uniformity of chromaticity have influence on the display effect of user greatly, therefore at present one of the development trend of display device is the homogeneity improving display, multiple homogeneity has been had to adjust mode at present, but need by instrument when carrying out homogeneity correction operation, and owing to needing the many factors of adjustment, cause correct operation to compare very complicated.

Summary of the invention

Based on this, be necessary to provide a kind of and homogeneity correction is carried out to display device operate fairly simple display device local bright chroma compensation method and system.

A kind of display device local bright chroma compensation method, comprises the following steps:

The some pixels selecting display device are specified point, adjust the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

According to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

Obtain mxm. and the minimum of the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point;

Rgb signal amount according to described specified point calculates semaphore corresponding to each pixel of display device by interpolation algorithm;

Described semaphore is issued in the control program of display device and shows.

A kind of display device local bright chroma bucking-out system, comprising:

Selecting module, for selecting some pixels of display device to be specified point, adjusting the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

Computing module, for according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

Acquisition module, for obtaining mxm. and the minimum of the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point;

Interpolation calculation module, calculates semaphore corresponding to each pixel of display device for the rgb signal amount according to described specified point by interpolation algorithm;

Display module, for described semaphore is issued to display device control program in show.

Above-mentioned display device local bright chroma compensation method and system, first some pixels of display device are selected to be specified point, and adjust the size of the brightness reference value Z of specified point, because semaphore does not have W look, by calculating Z after the size of the brightness reference value Z of adjustment specified point _wbe incorporated into Z _r, Z _g, Z _bin, obtain the object brightness reference value of RGB colors, thus according to the object brightness reference value of RGB colors and the mxm. of semaphore of colors and the difference of minimum, and the assorted maximal value of object brightness reference value and the difference of minimum value, calculate the assorted corresponding semaphore of RGB of described specified point, next utilize interpolation algorithm to calculate the semaphore of each pixel of display device, then shown by display device; Due to when carrying out local bright chroma compensation and namely carrying out adjustment homogeneity, only need the size of the brightness reference value Z adjusting pixel, special if finely tune, only need to adjust brightness reference value Z _w, homogeneity correction operation is carried out to display device fairly simple.

Accompanying drawing explanation

Fig. 1 is an embodiment display device local bright chroma compensation method process flow diagram;

Fig. 2 is another embodiment display device local bright chroma compensation method process flow diagram;

Fig. 3 is an embodiment display device RGBW specified point schematic diagram;

Fig. 4 is an embodiment display device local bright chroma bucking-out system structural representation.

Embodiment

Be described in detail below in conjunction with the embodiment of accompanying drawing to display device local bright chroma compensation method of the present invention and system.

Refer to Fig. 1, Fig. 1 is an embodiment display device local bright chroma compensation method process flow diagram.

A kind of display device local bright chroma compensation method, comprises the following steps:

Step S101: the some pixels selecting display device are specified point, adjust the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

In step S101, RGBW refers to red, green, blue, Bai Sise respectively, the specified point selected can be multiple pixel, such as 6,12 etc., the size of the brightness reference value Z of four look RGBW pre-sets in the display device, and the size of adjustment Z can adjust brightness and the uniformity of chromaticity of display device.

In one embodiment, nine pixels selecting display device are specified point.

Nine pixels selected can, in the surrounding of display device and centre, utilize nine pixels can obtain higher display device brightness and uniformity of chromaticity when adjusting the brightness reference value of less specified point.

Step S103: according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

In step s 103, because semaphore does not have W look, by calculating Z after the size of the brightness reference value Z of adjustment specified point _wbe incorporated into Z _r, Z _g, Z _bin, obtain the object brightness reference value of RGB colors, the assorted corresponding semaphore of RGB obtaining described specified point for subsequent calculations provides foundation.

In one embodiment, according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bstep can comprise: according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1object brightness reference value Z' is calculated by computing formula _r, object brightness reference value Z' _g, object brightness reference value Z' _b; Wherein, computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then ${Z^{\′}}_R=\left\{\begin{array}{cc}{Z}_R*Z_W& Z_R\≠0\&Z_W\≠0\\ Z_R& Z_W=0\\ Z_W& Z_R=0\end{array}\right.,$ ${Z^{\′}}_G=\left\{\begin{array}{cc}{Z}_G*Z_W& Z_G\≠0\&Z_W\≠0\\ Z_G& Z_W=0\\ Z_W& Z_G=0\end{array}\right.,$ ${Z^{\′}}_B=\left\{\begin{array}{cc}{Z}_B*Z_W& Z_B\≠0\&Z_W\≠0\\ Z_B& Z_W=0\\ Z_W& Z_B=0\end{array}\right.;$

If the variation range of brightness reference value Z is 0≤Z≤1, then Z' _r=Z _r* Z _w, Z' _g=Z _g* Z _w, Z' _b=Z _b* Z _w.

Step S105: the mxm. and the minimum that obtain the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point;

In step S105, obtain the assorted mxm. of semaphore and the difference of minimum, and the assorted maximal value of object brightness reference value and the difference of minimum value are the variation ranges in order to obtain assorted semaphore and brightness reference value, when assorted object brightness reference value change, assorted semaphore also can change in proportion in variation range.

In one embodiment, according to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the step that the maximal value of assorted object brightness reference value and minimum value calculate the assorted corresponding semaphore of RGB of described specified point can comprise:

According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point by semaphore computing formula; Wherein, semaphore computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G+1}{{Z^{\′}}_{G\max }+1}+G_{\min },$ $B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B+1}{{Z^{\′}}_{B\max }+1}+B_{\min };$

Wherein, R _maxrepresent R chrominance signal amount mxm., R _minrepresent R chrominance signal amount minimum, Z' _rmaxrepresent object brightness reference value Z' _rmaximal value, G _maxrepresent G chrominance signal amount mxm., G _minrepresent G chrominance signal amount minimum, Z' _gmaxrepresent object brightness reference value Z' _gmaximal value, B _maxrepresent B chrominance signal amount mxm., B _minrepresent B chrominance signal amount minimum, Z' _bmaxrepresent object brightness reference value Z' _bmaximal value;

If the variation range of brightness reference value Z is 0≤Z≤1, $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G}{{Z^{\′}}_{G\max }}+G_{\min },$ $B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B}{{Z^{\′}}_{B\max }}+B_{\min }.$

The ratio that object brightness reference value changes in variation range is identical with the ratio changed in variation range of assorted semaphore, thus can adjust brightness and the uniformity of chromaticity of display device more easily.

Step S107: the rgb signal amount according to described specified point calculates semaphore corresponding to each pixel of display device by interpolation algorithm;

In one embodiment, the described semaphore step calculating each pixel of display device corresponding by interpolation algorithm can comprise: calculate semaphore corresponding to each pixel of display device by spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm.

Utilize spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm can both calculate semaphore corresponding to each pixel more accurately under different situations.

Step S109: described semaphore is issued in the control program of display device and shows.

In one embodiment, described described semaphore is issued in the control program of display device carry out step display after can also comprise:

Whether the brightness of detection display equipment and colourity reach the uniformity criteria of setting, if do not reach, then, after the brightness and colourity that adjust display device reach the uniformity criteria of setting, exit flow process.

Adjusting once, if detect that the brightness of display device and colourity do not reach the uniformity criteria of setting, can repeat to adjust flow process, the brightness of display device and uniformity of chromaticity are adjusted, if reach the uniformity criteria of setting, adjustment flow process can be exited.

Above-mentioned display device local bright chroma compensation method, first some pixels of display device are selected to be specified point, and adjust the size of the brightness reference value Z of specified point, because semaphore does not have W look, by calculating Z after the size of the brightness reference value Z of adjustment specified point _wbe incorporated into Z _r, Z _g, Z _bin, obtain the object brightness reference value of RGB colors, thus according to the object brightness reference value of RGB colors and the mxm. of semaphore of colors and the difference of minimum, and the assorted maximal value of object brightness reference value and the difference of minimum value, calculate the assorted corresponding semaphore of RGB of described specified point, next utilize interpolation algorithm to calculate the semaphore of each pixel of display device, then shown by display device; Due to when carrying out local bright chroma compensation and namely carrying out adjustment homogeneity, only need the size of the brightness reference value Z adjusting pixel, special if finely tune, only need to adjust brightness reference value Z _w, homogeneity correction operation is carried out to display device fairly simple.

In order to further describe the bright chroma compensation method of display device of the present invention local in detail, be described below in conjunction with embody rule example.

Refer to Fig. 2, Fig. 2 is another embodiment display device local bright chroma compensation method process flow diagram.

Step S201: the z value determining specified point

Select specified point with the position (x, y) of the actual displayed pixel of display device, the brightness reference value of specified point is z, increases z, then can improve the brightness value of present scope; Reduce z, then reduce the brightness value of present scope, the z value of W, R, G, B is all adjustable.RGBW tetra-look all has independently z value, is respectively Z _r, Z _g, Z _b, Z _w, be the specified point respective value of RGBW tetra-look respectively.W tone is whole, is the brightness uniformity of adjustment display device, and RGB three color scheme is whole is respectively by adjusting the brightness of RGB tri-look at specified point to realize the target of the W chroma color homogeneity adjusting display device.

In this embody rule example, specify nine specified points, as shown below.Respectively by the z value of WRGB tetra-look of following 9 of adjustment, finally obtain the Z of 9 respectively _r, Z _g, Z _b, Z _wvalue

Step S201: be converted to semaphore:

By the Z that the page inputs _r, Z _g, Z _b, Z _wvalue is converted to the semaphore of corresponding RGB,

Because actual signal amount only has R, G, B tri-look, without W chrominance signal amount, therefore need the Z of W look _wvalue is converted in RGB, calculates object brightness reference value Z' _r, Z' _g, Z' _b;

Because the span of z is different, then can have influence on the transformational relation of z to semaphore, therefore two kinds of z spans are introduced in the citing of this embody rule example, and other spans also can be extrapolated according to this mode

If the variation range of brightness reference value Z is-1≤Z≤1,

Then ${Z^{\′}}_R=\left\{\begin{array}{cc}{Z}_R*Z_W& Z_R\≠0\&Z_W\≠0\\ Z_R& Z_W=0\\ Z_W& Z_R=0\end{array}\right.,$

${Z^{\′}}_G=\left\{\begin{array}{cc}{Z}_G*Z_W& Z_G\≠0\&Z_W\≠0\\ Z_G& Z_W=0\\ Z_W& Z_G=0\end{array}\right.,$

${Z^{\′}}_B=\left\{\begin{array}{cc}{Z}_B*Z_W& Z_B\≠0\&Z_W\≠0\\ Z_B& Z_W=0\\ Z_W& Z_B=0\end{array}\right.;$

If the variation range of brightness reference value Z is 0≤Z≤1, then Z' _r=Z _r* Z _w, Z' _g=Z _g* Z _w, Z' _b=Z _b* Z _w;

Step S202: by the Z' calculated _r, Z' _g, Z' _bbe converted to the input signal amount of corresponding RGB

If the semaphore mxm. of RGB colors is R _max, G _max, B _max, the lowest signal amount that can tune to is R _min, G _min, B _min, Z' _rmaxby there being a Z' _rmaximal value, Z' _gmaxby there being a Z' _gmaximal value, Z' _bmaxby there being a Z' _bmaximal value.

Then RGB tristimulus signal amount be calculated as follows formula:

If the variation range of brightness reference value Z is-1≤Z≤1, then

$R=(R_{\max }-R_{\min })*\frac{{Z^{\′}}_R+1}{{Z^{\′}}_{R\max }+1}+R_{\min },$

$G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G+1}{{Z^{\′}}_{G\max }+1}+G_{\min },$

$B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B+1}{{Z^{\′}}_{B\max }+1}+B_{\min };$

Wherein R _maxrepresent R chrominance signal amount mxm., R _minrepresent R chrominance signal amount minimum, Z' _rmaxrepresent object brightness reference value Z' _rmaximal value, G _maxrepresent G chrominance signal amount mxm., G _minrepresent G chrominance signal amount minimum, Z' _gmaxrepresent object brightness reference value Z' _gmaximal value, B _maxrepresent B chrominance signal amount mxm., B _minrepresent B chrominance signal amount minimum, Z' _bmaxrepresent object brightness reference value Z' _bmaximal value;

If the variation range of brightness reference value Z is 0≤Z≤1,

$R=(R_{\max }-R_{\min })*\frac{{Z^{\′}}_R}{{Z^{\′}}_{R\max }}+R_{\min },$

$G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G}{{Z^{\′}}_{G\max }}+G_{\min },$

$B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B}{{Z^{\′}}_{B\max }}+B_{\min }.$

Step S203: utilize interpolation to obtain the semaphore of other pixels;

According to the semaphore of the specified point that step S202 calculates, calculate each point semaphore corresponding to each pixel of display device by interpolation algorithm, comprise the rgb signal amount of each point.

Different interpolation methods can be adopted according to the actual requirements to carry out interpolation, as spline curve interpolation, least square method interpolation, bilinear interpolation etc.

By this step, the rgb signal amount obtaining each pixel of display device after homogeneity adjustment can be calculated.

Meanwhile, the Z of each pixel of display device also first can be gone out by interpolation calculation _r, Z _g, Z _b, Z _wvalue, secondly by the Z of all pixels _r, Z _g, Z _b, Z _wvalue is converted to rgb signal amount corresponding to each point according to step S202.

Step S204:: issue semaphore.

The rgb signal amount of each pixel of the display device calculated by step S203 issues according to assigned address respectively and is burned onto in the control program of display device, and display device then finally shows according to the semaphore issued

Step S205: be circulated to final confirmation.

Observe the display effect after adjustment, if still there is brightness and colourity unevenness, be then circulated to the z value that step one adjusts each specified point again, repeat above-mentioned homogeneity adjustment flow process, if meet homogeneity adjustment demand, then exit this circulation, confirm final Adjustment effect.

Refer to Fig. 4, Fig. 4 is an embodiment display device local bright chroma bucking-out system structural representation.

A kind of display device local bright chroma bucking-out system, comprising:

Selecting module 301, for selecting some pixels of display device to be specified point, adjusting the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

Computing module 303, for according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

Acquisition module 305, for obtaining mxm. and the minimum of the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point;

Interpolation calculation module 307, calculates semaphore corresponding to each pixel of display device for the rgb signal amount according to described specified point by interpolation algorithm;

Display module 309, for described semaphore is issued to display device control program in show.

Above-mentioned display device local bright chroma bucking-out system, first some pixels of display device are selected to be specified point, and adjust the size of the brightness reference value Z of specified point, because semaphore does not have W look, by calculating Z after the size of the brightness reference value Z of adjustment specified point _wbe incorporated into Z _r, Z _g, Z _bin, obtain the object brightness reference value of RGB colors, thus according to the object brightness reference value of RGB colors and the mxm. of semaphore of colors and the difference of minimum, and the assorted maximal value of object brightness reference value and the difference of minimum value, calculate the assorted corresponding semaphore of RGB of described specified point, next utilize interpolation algorithm to calculate the semaphore of each pixel of display device, then shown by display device; Due to when carrying out local bright chroma compensation and namely carrying out adjustment homogeneity, only need the size of the brightness reference value Z adjusting pixel, special if finely tune, only need to adjust brightness reference value Z _w, homogeneity correction operation is carried out to display device fairly simple.

In one embodiment, described computing module 303 can be further used for:

According to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1object brightness reference value Z' is calculated by computing formula _r, object brightness reference value Z' _g, object brightness reference value Z' _b; Wherein, computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then

${Z^{\′}}_G=\left\{\begin{array}{cc}{Z}_G*Z_W& Z_G\≠0\&Z_W\≠0\\ Z_G& Z_W=0\\ Z_W& Z_G=0\end{array}\right.,$ ${Z^{\′}}_B=\left\{\begin{array}{cc}{Z}_B*Z_W& Z_B\≠0\&Z_W\≠0\\ Z_B& Z_W=0\\ Z_W& Z_B=0\end{array}\right.;$

If the variation range of brightness reference value Z is 0≤Z≤1, then Z' _r=Z _r* Z _w, Z' _g=Z _g* Z _w, Z' _b=Z _b* Z _w.

In one embodiment, described acquisition module 305 can be further used for:

According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point by semaphore computing formula; Wherein, semaphore computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then

$G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G+1}{{Z^{\′}}_{G\max }+1}+G_{\min },$ $B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B+1}{{Z^{\′}}_{B\max }+1}+B_{\min };$

Wherein, R _maxrepresent R chrominance signal amount mxm., R _minrepresent R chrominance signal amount minimum, Z' _rmaxrepresent object brightness reference value Z' _rmaximal value, G _maxrepresent G chrominance signal amount mxm., G _minrepresent G chrominance signal amount minimum, Z' _gmaxrepresent object brightness reference value Z' _gmaximal value, B _maxrepresent B chrominance signal amount mxm., B _minrepresent B chrominance signal amount minimum, Z' _bmaxrepresent object brightness reference value Z' _bmaximal value;

If the variation range of brightness reference value Z is 0≤Z≤1, $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G}{{Z^{\′}}_{G\max }}+G_{\min },$ $B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B}{{Z^{\′}}_{B\max }}+B_{\min }.$

The ratio that object brightness reference value changes in variation range is identical with the ratio changed in variation range of assorted semaphore, thus can adjust brightness and the uniformity of chromaticity of display device more easily.

In one embodiment, described interpolation calculation module 307 performs the described process calculating semaphore corresponding to each pixel of display device by interpolation algorithm and is further used for: calculate semaphore corresponding to each pixel of display device by spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm.

Utilize spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm can both calculate semaphore corresponding to each pixel more accurately under different situations.

In one embodiment, nine pixels can selecting display device are specified point.

Nine pixels selected can, in the surrounding of display device and centre, utilize nine pixels can obtain higher display device brightness and uniformity of chromaticity when adjusting the brightness reference value of less specified point.

In one embodiment, the present embodiment display device local bright chroma bucking-out system can also comprise:

Whether detection module, reach the uniformity criteria of setting for the brightness of detection display equipment and colourity, if do not reach, then, after the brightness of adjustment display device and colourity reach the uniformity criteria of setting, exit flow process.

Adjusting once, if detect that the brightness of display device and colourity do not reach the uniformity criteria of setting, can repeat to adjust flow process, the brightness of display device and uniformity of chromaticity are adjusted, if reach the uniformity criteria of setting, adjustment flow process can be exited.

Display device local bright chroma bucking-out system of the present invention and display device of the present invention local bright chroma compensation method one_to_one corresponding, the technical characteristic of setting forth in the embodiment of above-mentioned display device local bright chroma compensation method and beneficial effect thereof are all applicable to, in the embodiment of display device local bright chroma bucking-out system, hereby state.

The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a display device local bright chroma compensation method, is characterized in that, comprise the following steps:

The some pixels selecting display device are specified point, adjust the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

According to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

Obtain mxm. and the minimum of the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value calculate the assorted corresponding semaphore of RGB of described specified point;

Rgb signal amount according to described specified point calculates semaphore corresponding to each pixel of display device by interpolation algorithm;

Described semaphore is issued in the control program of display device and shows.

2. display device local bright chroma compensation method according to claim 1, is characterized in that, according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bstep comprise:

According to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1object brightness reference value Z' is calculated by computing formula _r, object brightness reference value Z' _g, object brightness reference value Z' _b, wherein, computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then

If the variation range of brightness reference value Z is 0≤Z≤1, then Z' _r=Z _r* Z _w, Z' _g=Z _g* Z _w, Z' _b=Z _b* Z _w.

3. display device local bright chroma compensation method according to claim 1, it is characterized in that, according to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the step that the maximal value of assorted object brightness reference value and minimum value calculate the assorted corresponding semaphore of RGB of described specified point comprises:

According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value calculate the assorted corresponding semaphore of RGB of described specified point by semaphore computing formula; Wherein, semaphore computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G+1}{{Z^{\′}}_{G\max }+1}+G_{\min },B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B+1}{{Z^{\′}}_{B\max }+1}+B_{\min };$

Wherein, R _maxrepresent R chrominance signal amount mxm., R _minrepresent R chrominance signal amount minimum, Z' _rmaxrepresent object brightness reference value Z' _rmaximal value, G _maxrepresent G chrominance signal amount mxm., G _minrepresent G chrominance signal amount minimum, Z' _gmaxrepresent object brightness reference value Z' _gmaximal value, B _maxrepresent B chrominance signal amount mxm., B _minrepresent B chrominance signal amount minimum, Z' _bmaxrepresent object brightness reference value Z' _bmaximal value;

If the variation range of brightness reference value Z is 0≤Z≤1, $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G}{{Z^{\′}}_{G\max }}+G_{\min },B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B}{{Z^{\′}}_{B\max }}+B_{\min }.$

4. display device local bright chroma compensation method according to claim 1, it is characterized in that, nine pixels selecting display device are specified point.

5. display device local bright chroma compensation method according to claim 1, it is characterized in that, the described semaphore step calculating each pixel of display device corresponding by interpolation algorithm comprises: calculate semaphore corresponding to each pixel of display device by spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm.

6. the bright chroma compensation method of display device according to claim 1 local, is characterized in that, described described semaphore is issued in the control program of display device carry out step display after also comprise:

Whether the brightness of detection display equipment and colourity reach the uniformity criteria of setting, if do not reach, then, after the brightness and colourity that adjust display device reach the uniformity criteria of setting, exit flow process.

7. a display device local bright chroma bucking-out system, is characterized in that, comprising:

Selecting module, for selecting some pixels of display device to be specified point, adjusting the size of the brightness reference value Z of four look RGBW of each specified point, the brightness reference value Z after being adjusted _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1; Wherein, brightness reference value Z comprises brightness reference value Z _r, brightness reference value Z _g, brightness reference value Z _b, brightness reference value Z _w;

Computing module, for according to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1calculate object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _b;

Acquisition module, for obtaining mxm. and the minimum of the semaphore of RGB colors, and described object brightness reference value Z' _r, object brightness reference value Z' _g, object brightness reference value Z' _bmaximal value and minimum value; According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point;

Interpolation calculation module, calculates semaphore corresponding to each pixel of display device for the rgb signal amount according to described specified point by interpolation algorithm;

Display module, for described semaphore is issued to display device control program in show.

8. display device local according to claim 7 bright chroma bucking-out system, it is characterized in that, described computing module is further used for:

According to described brightness reference value Z _r1, brightness reference value Z _g1, brightness reference value Z _b1, brightness reference value Z _w1object brightness reference value Z' is calculated by computing formula _r, object brightness reference value Z' _g, object brightness reference value Z' _b; Wherein, computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then

If the variation range of brightness reference value Z is 0≤Z≤1, then Z' _r=Z _r* Z _w, Z' _g=Z _g* Z _w, Z' _b=Z _b* Z _w.

9. display device local according to claim 7 bright chroma bucking-out system, it is characterized in that, described acquisition module is further used for:

According to the object brightness reference value of RGB colors, the mxm. of assorted semaphore and minimum, and the maximal value of assorted object brightness reference value and minimum value, calculate the assorted corresponding semaphore of RGB of described specified point by semaphore computing formula; Wherein, semaphore computing formula is:

If the variation range of brightness reference value Z is-1≤Z≤1, then $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G+1}{{Z^{\′}}_{G\max }+1}+G_{\min },B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B+1}{{Z^{\′}}_{B\max }+1}+B_{\min };$

Wherein, R _maxrepresent R chrominance signal amount mxm., R _minrepresent R chrominance signal amount minimum, Z' _rmaxrepresent object brightness reference value Z' _rmaximal value, G _maxrepresent G chrominance signal amount mxm., G _minrepresent G chrominance signal amount minimum, Z' _gmaxrepresent object brightness reference value Z' _gmaximal value, B _maxrepresent B chrominance signal amount mxm., B _minrepresent B chrominance signal amount minimum, Z' _bmaxrepresent object brightness reference value Z' _bmaximal value;

If the variation range of brightness reference value Z is 0≤Z≤1, $G=(G_{\max }-G_{\min })*\frac{{Z^{\′}}_G}{{Z^{\′}}_{G\max }}+G_{\min },B=(B_{\max }-B_{\min })*\frac{{Z^{\′}}_B}{{Z^{\′}}_{B\max }}+B_{\min }.$

10. display device local according to claim 7 bright chroma bucking-out system, it is characterized in that, described interpolation calculation module performs the described process calculating semaphore corresponding to each pixel of display device by interpolation algorithm and is further used for: calculate semaphore corresponding to each pixel of display device by spline curve interpolation algorithm, least square method interpolation algorithm or bilinear interpolation algorithm.