CN105304062A - Chrominance adjustment method of liquid crystal display and device - Google Patents
Chrominance adjustment method of liquid crystal display and device Download PDFInfo
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Abstract
The invention provides a chrominance adjustment method of a liquid crystal display and a device. The method comprises steps of measuring chrominance coordinates of the minimum gray-scale value and the maximum gray-scale value of a to-be-adjusted display; setting the chrominance coordinate of the critical gray-scale value of the to-be-adjusted display to be the chrominance coordinate of the maximum gray-scale value; calculating the chrominance coordinates of all gray-scale values between the minimum gray-scale value and the maximum gray-scale value of the to-be-adjusted display according to the chrominance coordinates of the minimum gray-scale value and the critical gray-scale value of the to-be-adjusted display and the reference chrominance coordinates between the gray-scale value and the critical gray-scale value of a standard display; and adjusting the chrominance of the to-be-adjusted display according to the chrominance coordinates of the minimum gray-scale value and the critical gray-scale value of the to-be-adjusted display. According to the invention, the chrominance of a display can be automatically and precisely adjusted via a device, thereby greatly increasing chrominance debugging efficiency of the display.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of colourity control method and device of LCDs.
Background technology
LCDs has goed deep into the every field of people's life as a kind of display device of widespread use, and it can show abundant color, and that also can reproduce low GTG scene (picture) and high gray scene enriches details.Human eye is especially very sensitive for low grey menu, can tell the deviation of color and brightness under dark picture relatively easily.Therefore, in the process of debugging LCDs, just seem particularly important for the process of low GTG, it directly can affect the expression effect of display screen.
At present, regulate the method for low GTG colourity and brightness mainly with eye-observation less than obvious taste problem for final goal, or utilize instrument to measure LCDs, then debug according to measurement result, substantially keep smooth excessiveness to make its brightness and colourity.
For the adjustment of brightness aspect, automatically can complete by instrument, or be aided with and a small amount of manually carry out fine adjustments.
But for the adjustment of colourity aspect, because the change procedure of colourity when low GTG is not linear, and do not have clear and definite formula, namely do not have specific aim chromatic value, therefore very difficult instrument regulates.
To this, more common way sees with human eye while carry out whole by contrast for low GTG at present, and colourity keeps seamlessly transitting substantially to make it look, so not only regulates efficiency low, and due to everyone vision difference, the colourity adjusted may be caused also to have larger difference.
Summary of the invention
technical matters
In view of this, the technical problem to be solved in the present invention is the colourity of how automatically and exactly adjustable liquid crystal display display screen.
solution
According to an aspect of the present invention, provide a kind of colourity control method of LCDs, comprising: measure the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value; The chromaticity coordinate of the critical grey decision-making of described display screen to be regulated is set to the chromaticity coordinate of described maximum gray value; According to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; And according to described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of described display screen to be regulated.
For above-mentioned colourity control method, in a kind of possible implementation, according to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, comprise: the first chromaticity coordinate calculation procedure, for according to the first chromaticity coordinate in the reference chromaticity coordinate of described conventional display, the first chromaticity coordinate in the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, second chromaticity coordinate calculation procedure, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, described conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
For above-mentioned colourity control method, in a kind of possible implementation, adopt in described first chromaticity coordinate calculation procedure following formula 1 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
For above-mentioned colourity control method, in a kind of possible implementation, adopt in described second chromaticity coordinate calculation procedure following formula 2 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x'
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
For above-mentioned colourity control method, in a kind of possible implementation, also comprise:
From multiple LCDs, selective light mathematic(al) parameter is positioned at the LCDs of intermediate value as described conventional display.
According to a further aspect in the invention, provide a kind of colourity regulating device of LCDs, comprising: measurement module, for measuring the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value; Arrange module, be connected with described measurement module, the chromaticity coordinate for the critical grey decision-making by described display screen to be regulated is set to the chromaticity coordinate of described maximum gray value; Chromaticity coordinate computing module, respectively with described measurement module with describedly arrange model calling, for according to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; And colourity adjustment module, be connected with described chromaticity coordinate computing module, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of described display screen to be regulated.
For above-mentioned colourity regulating device, in a kind of possible implementation, described chromaticity coordinate computing module comprises: the first chromaticity coordinate computing module, for according to the first chromaticity coordinate in the first chromaticity coordinate in the reference chromaticity coordinate of described conventional display, the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making; Second chromaticity coordinate computing module, be connected with described first chromaticity coordinate computing module, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, described conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
For above-mentioned colourity regulating device, in a kind of possible implementation, described first chromaticity coordinate computing module adopt following formula 1 calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
For above-mentioned colourity regulating device, in a kind of possible implementation, described second chromaticity coordinate computing module adopt following formula 2 calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x'
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
For above-mentioned colourity regulating device, in a kind of possible implementation, also comprise:
Select module, be connected with described chromaticity coordinate computing module, be positioned at the LCDs of intermediate value as described conventional display for selective light mathematic(al) parameter from multiple LCDs.
beneficial effect
The colourity control method of the LCDs provided according to the present embodiment and device, the chromaticity coordinate of each low GTG of other display screen to be regulated can be calculated by the chromaticity coordinate of each low GTG as conventional display, thus regulate the colourity of display screen according to the chromaticity coordinate of calculated each low GTG, to obtain the display screen of the good and eye-observation of optical parametric less than obvious taste problem.According to colourity control method and the device of the present embodiment, instrument can be utilized automatically also to regulate the colourity of display screen exactly, thus greatly can improve the colourity debugging efficiency of display screen.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, further feature of the present invention and aspect will become clear.
Accompanying drawing explanation
Comprise in the description and form the accompanying drawing of a part for instructions and instructions together illustrates exemplary embodiment of the present invention, characteristic sum aspect, and for explaining principle of the present invention.
Fig. 1 illustrates the process flow diagram of the colourity control method of LCDs according to an embodiment of the invention;
Fig. 2 illustrates the chroma curve figure of conventional display;
The chroma curve comparison diagram of the display screen after Fig. 3 illustrates conventional display and carries out colourity debugging;
The comparison diagram of the chroma curve of the low grey exponent part of the display screen after Fig. 4 illustrates conventional display and carries out colourity debugging;
Fig. 5 illustrates the structured flowchart of the colourity regulating device of LCDs according to an embodiment of the invention.
Embodiment
Various exemplary embodiment of the present invention, characteristic sum aspect is described in detail below with reference to accompanying drawing.The same or analogous element of Reference numeral presentation function identical in accompanying drawing.Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, accompanying drawing need not be drawn in proportion.
Word " exemplary " special here means " as example, embodiment or illustrative ".Here need not be interpreted as being better than or being better than other embodiment as any embodiment illustrated by " exemplary ".
In addition, in order to better the present invention is described, in embodiment hereafter, give numerous details.It will be appreciated by those skilled in the art that do not have some detail, the present invention can implement equally.In some instances, the method known for those skilled in the art, means, element and circuit are not described in detail, so that highlight purport of the present invention.
embodiment 1
Fig. 1 illustrates the process flow diagram of the colourity control method of LCDs according to an embodiment of the invention.As shown in Figure 1, this colourity control method mainly can comprise the following steps:
Step S100, measure the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value;
Step S101, the chromaticity coordinate of the critical grey decision-making of display screen to be regulated is set to the chromaticity coordinate of maximum gray value;
Step S102, according to the minimum gray value of display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; And
Step S103, according to display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of display screen to be regulated.
For above-mentioned steps S100, in a kind of possible implementation, first can regulate the brightness of display screen to be regulated, specifically its brightness regulation can be become predetermined gamma curve, such as, be adjusted to gamma2.2 curve.And then under display screen to be regulated is placed in white balance state, measure the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value.Wherein, the grey decision-making of display screen to be regulated can be such as 0 ~ 255, and in this case, minimum gray value is 0, and maximum gray value is 255.Under normal circumstances, chromaticity coordinate can be expressed as (x, y).
For above-mentioned steps S101, in display screen, there is a critical GTG under normal circumstances.From minimum gray to critical GTG, the colourity of display screen gradually changes.But along with the rising of GTG, human eye can not be seen obvious misalignment.Therefore, when the colourity of carrying out display screen regulates, usually display screen to be regulated can be adjusted to unanimously from critical grey decision-making to the chromaticity coordinate of maximum gray value.In a kind of possible implementation, critical grey decision-making is all adjusted to the chromaticity coordinate of maximum gray value to the chromaticity coordinate of large grey decision-making.
For above-mentioned steps S102, in a kind of possible implementation, mainly can comprise the first chromaticity coordinate calculation procedure (step S1021) and the second chromaticity coordinate calculation procedure (step S1022).
In above-mentioned first chromaticity coordinate calculation procedure, according to the first chromaticity coordinate in the minimum gray value of the first chromaticity coordinate in the reference chromaticity coordinate of conventional display, display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making.
Specifically, when colourity adjustment will be carried out to a collection of display screen, first select a conventional display as benchmark, after the brightness regulation of this conventional display being become predetermined gamma curve, such as gamma2.2 curve, under this conventional display being placed in white balance state, the colourity of this conventional display is regulated, with the transition making the colourity of this display screen substantially keep level and smooth, and eye-observation is less than significantly sampling problem.The defining method of conventional display can have multiple, in a kind of possible implementation, can measure the optical parametric of multiple LCDs in advance, from these LCDs, selective light mathematic(al) parameter is positioned at the LCDs of intermediate value as conventional display.Wherein, optical parametric can be the brightness and colourity etc. of LCDs.The LCDs of intermediate value is positioned at as conventional display by selective light mathematic(al) parameter, the deviation of colourity between display screen to be regulated and conventional display can be reduced, thus can save subsequent adjustment become optical parametric good and eye-observation less than time of the display screen of obvious taste problem.
As shown in Figure 2, the conventional display carried out after above-mentioned colourity adjustment correspond to a better chroma curve, using this chroma curve as reference chroma curve during subsequent adjustment.Then, according to this reference chroma curve, for each grey decision-making of conventional display, the chromatic value of each grey decision-making can be recorded, namely with reference to chromaticity coordinate.In a kind of possible implementation, grey decision-making is 0 ~ 255, and the reference chromaticity coordinate of each grey decision-making can be expressed as (x
i, y
i), wherein, i=0,1,2 ... 255.
Because the colourity variation tendency of each display screen is basically identical, are namely all curve shapes as shown in Figure 2.Therefore, can utilize on the chroma curve of conventional display for each GTG chromaticity coordinate to calculate the chromaticity coordinate of the corresponding each GTG of other display screen to be regulated.
Specifically, in above-mentioned first chromaticity coordinate calculation procedure, the minimum gray value of conventional display can be utilized, the first chromaticity coordinate from minimum gray value to critical grey decision-making, the reference chromaticity coordinate of critical grey decision-making, and measure in step S100, S101 or the minimum gray value of display screen to be regulated arranged, critical grey decision-making chromaticity coordinate in the first chromaticity coordinate, calculate display screen to be regulated from minimum gray value to the first chromaticity coordinate of the chromaticity coordinate of each grey decision-making critical grey decision-making, i.e. low grey decision-making.
For example, the grey-scale range of display screen is 0 ~ 255, and wherein, minimum gray value is 0, and critical grey decision-making is 20, can utilize the first chromaticity coordinate x in the reference chromaticity coordinate of 0 GTG of conventional display, 1 GTG, 20 GTGs
0, x
1, x
20, and the first chromaticity coordinate x ' in 0 GTG of display screen to be regulated and the chromaticity coordinate of 20 GTGs
0, x '
20, calculate the first chromaticity coordinate x ' in the chromaticity coordinate of 1 GTG of display screen to be regulated
1.By that analogy, the first chromaticity coordinate x ' 2 in the chromaticity coordinate of 2 ~ 19 GTGs of display screen to be regulated can be calculated ... x ' 19.
In above-mentioned second chromaticity coordinate calculation procedure, according to display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
Specifically, in above-mentioned second chromaticity coordinate calculation procedure, the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value of display screen to be regulated (measure in the step s 100 and obtain) can be utilized, the first chromaticity coordinate (calculating in above-mentioned first chromaticity coordinate calculation procedure) from minimum gray value to the chromaticity coordinate of critical grey decision-making, the first chromaticity coordinate in the chromaticity coordinate of critical grey decision-making (arrange in by above-mentioned steps S101 and obtain), and the minimum gray value of conventional display, from minimum gray value to critical grey decision-making, the first chromaticity coordinate in the reference chromaticity coordinate of critical grey decision-making and the second chromaticity coordinate, calculate display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
For example, the first chromaticity coordinate x ' in the chromaticity coordinate of 0 GTG of display screen to be regulated can be utilized
0, 1 GTG chromaticity coordinate in the first chromaticity coordinate x '
1, 20 GTGs chromaticity coordinate in the first chromaticity coordinate x '
20, with reference to the first chromaticity coordinate x in chromaticity coordinate
0, x
1, x
20, and the chromaticity coordinate (x of 0 GTG of conventional display
0, y
0), the chromaticity coordinate (x of 1 GTG of conventional display
1, y
1), the chromaticity coordinate (x of 20 GTGs of conventional display
20, y
20), calculate the second chromaticity coordinate y ' in the chromaticity coordinate of 1 GTG of display screen to be regulated
1, by that analogy, the second chromaticity coordinate y ' in the chromaticity coordinate of 2 ~ 19 GTGs of display screen to be regulated can be calculated
2... y '
19.
Thus, by above-mentioned first chromaticity coordinate calculation procedure and the second chromaticity coordinate calculation procedure, the chromaticity coordinate of each grey decision-making of display screen to be regulated from minimum gray value to critical grey decision-making (i.e. low GTG) can be calculated.
For above-mentioned steps S103, can according to calculate from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making regulate the colourity of display screen to be regulated.Specifically, can according to measure the minimum gray value that obtain chromaticity coordinate, calculate from minimum gray value to the chromaticity coordinate of critical grey decision-making, chromaticity coordinate (being all arranged to the chromaticity coordinate of the maximum gray value measured) from critical grey decision-making to maximum gray value, regulate the colourity of display screen.
In addition, because the variation tendency of the first chromaticity coordinate in the chromaticity coordinate of each display screen and the second chromaticity coordinate is basically identical, therefore, in a kind of possible implementation, method illustrated in above-mentioned first chromaticity coordinate calculation procedure can be utilized to calculate the second chromaticity coordinate, and correspondingly, utilize method illustrated in above-mentioned second chromaticity coordinate calculation procedure to calculate the first chromaticity coordinate.
According to the colourity control method of the LCDs that the present embodiment provides, the chromaticity coordinate of each low GTG of other display screen to be regulated can be calculated by the chromaticity coordinate of each low GTG as conventional display, thus regulate the colourity of display screen according to the chromaticity coordinate of calculated each low GTG, to obtain the display screen of the good and eye-observation of optical parametric less than obvious taste problem.According to the colourity control method of the present embodiment, instrument can be utilized automatically also to regulate the colourity of display screen exactly, thus greatly can improve the colourity debugging efficiency of display screen.
embodiment 2
The key distinction of the present embodiment and above-described embodiment 1 is, specifically can adopt in above-mentioned first chromaticity coordinate calculation procedure following formula 1 to calculate display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, above formula 1 specifically can be derived by following formula 3,
In above formula 1,3, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
In a kind of possible implementation, can adopt in above-mentioned second chromaticity coordinate calculation procedure following formula 2 to calculate display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, above formula 2 specifically can be derived by following formula 4,
In above formula 2,4, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x'
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
In a kind of possible implementation, also the first chromaticity coordinate x in above formula 1 can be replaced with y, formula specifically can be adopted to calculate y as shown in the formula 1 ',
Correspondingly, above formula 1 ' is derived by following formula 3 ',
In a kind of possible implementation, also the second chromaticity coordinate y in above formula 2 can be replaced with x, formula specifically can be adopted to calculate x as shown in the formula 2 ',
Wherein, above formula 2 specifically can be derived by following formula 4,
Wherein, d
m=x
m-y
m, d
i=x
i-y
i, d
n=x
n-y
n, d'
m=x'
m-y'
m, d '
i=x '
i-y '
i, d'
n=x'
n-y'
n.
Be below an embody rule example of the present embodiment, its detailed process is as follows.
1, from a collection of LCDs, select an optical parametric be positioned at display screen near intermediate value, this display screen is designated as conventional display.Wherein LCDs is such as that (English: VerticalAlignment) display screen, grey decision-making is 0 ~ 255 to vertical orientation type, and this optical parametric is such as brightness.Then carry out colourity debugging to this conventional display, display screen to be debugged into the chroma curve of the good and eye-observation of optical parametric less than obvious taste problem, this chroma curve as shown in Figure 2, is preserved this chroma curve and it can be used as with reference to chroma curve.The chromaticity coordinate of each GTG of conventional display is designated as (x
i, y
i), i=0,1 ..., 255.
2, display screen to be regulated is taken out, first its brightness is adjusted to gamma2.2 curve, and under making this display screen to be regulated be in white balance state, then measure respectively its 0 (minimum gray value) rank and 255 (maximum gray value) rank chromaticity coordinate (x '
0, y '
0) and (x '
255, y '
255), the chromaticity coordinate on 20 (critical grey decision-making) rank, rank to 254 is adjusted to identical with 255 rank, the chromaticity coordinate of display screen to be regulated is designated as (x '
i, y '
i), i=0,1 ..., 255.Now, (x '
20, y '
20)=(x '
255, y '
255).
3, according to the chromaticity coordinate of 0 GTG with reference to chroma curve and display screen to be regulated (x '
0, y '
0) and 20 rank chromaticity coordinate (x '
20, y '
20), calculate the chromaticity coordinate on 1 ~ 19 rank (from minimum gray value to critical grey decision-making, i.e. low GTG) of display screen to be regulated.
First, the first chromaticity coordinate x ' is calculated
j, j=1,2 ..., 19.
Conventional display and display screen to be regulated meet following formula 5,
Arrange to obtain following formula 6,
Thereby, it is possible to obtain the first chromaticity coordinate of all low GTG of display screen to be regulated.
Secondly, the second chromaticity coordinate y ' is calculated
j, j=1,2 ..., 19.
It should be noted that, adjustment y (the second chromaticity coordinate) can not be gone by the method being similar to x (the first chromaticity coordinate), because the performance of color can be subject to the impact of x and y two values simultaneously, if adjust x respectively, y and do not consider its interaction relationship, then can cause its color combining out inconsistent under different GTG.Therefore, in this example, adjustment y time with the difference between x and y of conventional display for standard, remove the y adjusting display screen to be regulated.
Particularly, if d
0=y
0-x
0, d
j=y
j-x
j, d
20=y
20-x
20, d'
0=y'
0-x'
0, d'
j=y'
j-x'
jd'
20=y'
20-x'
20, j=1,2 ..., 19.
Correspondingly, conventional display and display screen to be regulated meet following formula 7,
formula 7
Arrange to obtain following formula 8,
Again by y'
j=x'
j+ d'
j, namely obtain y '
j.
Thereby, it is possible to obtain the second chromaticity coordinate of all low GTG of display screen to be regulated.
4, the colourity of display screen is regulated according to the chromaticity coordinate of 0 ~ 255 GTG obtained in said process.
Specifically, according to the chromaticity coordinate of 0 ~ 255 GTG, regulate the voltage be applied on liquid crystal cell that in LCDs, each RGB sub-pixel is corresponding, thus regulate the colourity of display screen.The chroma curve comparison diagram of the display screen after being illustrated in figure 3 conventional display and carrying out colourity debugging, the comparison diagram of the chroma curve of the low grey exponent part of the display screen after being illustrated in figure 4 conventional display and carrying out colourity debugging.
Like this, according to the colourity control method in this example, can automatically and exactly colourity adjustment is carried out to display screen, this display screen is debugged into the good and eye-observation of optical parametric less than obvious taste problem.
According to the colourity control method of the LCDs that the present embodiment provides, the chromaticity coordinate of each low GTG of other display screen to be regulated can be calculated by the chromaticity coordinate of each low GTG as conventional display, thus regulate the colourity of display screen according to the chromaticity coordinate of calculated each low GTG, to obtain the display screen of the good and eye-observation of optical parametric less than obvious taste problem.According to the colourity control method of the present embodiment, instrument can be utilized automatically also to regulate the colourity of display screen exactly, thus greatly can improve the colourity debugging efficiency of display screen.
It should be noted that, although be 0 ~ 255 exemplarily describe colourity control method of the present invention with grey decision-making, it will be appreciated by those skilled in the art that the present invention should be not limited thereto.In fact, can change flexibly arranging of grey decision-making according to display screen in reality.
embodiment 3
Fig. 5 illustrates the structured flowchart of the colourity regulating device of LCDs according to an embodiment of the invention.As shown in Figure 5, the colourity regulating device 50 of LCDs mainly can comprise: measurement module 51, arrange module 52, chromaticity coordinate computing module 53 and colourity adjustment module 54.Wherein, measurement module 51 is mainly used in measuring the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value; Arrange module 52 to be connected with measurement module 51, be mainly used in the chromaticity coordinate chromaticity coordinate of the critical grey decision-making of described display screen to be regulated being set to described maximum gray value; Chromaticity coordinate computing module 53 can respectively with measurement module 51 with arrange module 52 and be connected, be mainly used according to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; Colourity adjustment module 54 can be connected with chromaticity coordinate computing module 53, be mainly used according to described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of described display screen to be regulated.
In a kind of possible implementation, chromaticity coordinate computing module 53 mainly can comprise the first chromaticity coordinate computing module 531 and the second chromaticity coordinate computing module 532.Wherein, first chromaticity coordinate computing module 531 is mainly used according to the first chromaticity coordinate in the first chromaticity coordinate in the reference chromaticity coordinate of described conventional display, the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making; Second chromaticity coordinate computing module 532 can be connected with described first chromaticity coordinate computing module 531, be mainly used according to described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, described conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
The above-mentioned colourity regulating device of the present embodiment can be used for performing the colourity control method of above-described embodiment 1, and the idiographic flow of this colourity control method is see the concrete elaboration of above-described embodiment 1.
In a kind of possible implementation, the first chromaticity coordinate computing module 531 can adopt following formula 1 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
In a kind of possible implementation, the second chromaticity coordinate computing module 532 can adopt following formula 2 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x '
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
In a kind of possible implementation, above-mentioned colourity regulating device also comprises selects module 55.Wherein, select module 55 can be connected with described chromaticity coordinate computing module 53, be mainly used in selective light mathematic(al) parameter from multiple LCDs and be positioned at the LCDs of intermediate value as described conventional display.
The above-mentioned colourity regulating device of the present embodiment can be used for performing the colourity control method of above-described embodiment 2, and the idiographic flow of this colourity control method is see the concrete elaboration of above-described embodiment 2.
According to the colourity regulating device of the LCDs that the present embodiment provides, the chromaticity coordinate of each low GTG of other display screen to be regulated can be calculated by the chromaticity coordinate of each low GTG as conventional display, thus regulate the colourity of display screen according to the chromaticity coordinate of calculated each low GTG, to obtain the display screen of the good and eye-observation of optical parametric less than obvious taste problem.According to the colourity regulating device of the present embodiment, instrument can be utilized automatically also to regulate the colourity of display screen exactly, thus greatly can improve the colourity debugging efficiency of display screen.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a colourity control method for LCDs, is characterized in that, comprising:
Measure the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value;
The chromaticity coordinate of the critical grey decision-making of described display screen to be regulated is set to the chromaticity coordinate of described maximum gray value;
According to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; And
According to described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of described display screen to be regulated.
2. method according to claim 1, it is characterized in that, according to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, comprising:
First chromaticity coordinate calculation procedure, for according to the first chromaticity coordinate in the first chromaticity coordinate in the reference chromaticity coordinate of described conventional display, the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making;
Second chromaticity coordinate calculation procedure, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, described conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
3. method according to claim 2, is characterized in that, adopt in described first chromaticity coordinate calculation procedure following formula 1 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
4. method according to claim 3, is characterized in that, adopt in described second chromaticity coordinate calculation procedure following formula 2 to calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x'
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
5. method according to any one of claim 1 to 4, is characterized in that, also comprises:
From multiple LCDs, selective light mathematic(al) parameter is positioned at the LCDs of intermediate value as described conventional display.
6. a colourity regulating device for LCDs, is characterized in that, comprising:
Measurement module, for measuring the chromaticity coordinate of display screen to be regulated in minimum gray value and maximum gray value;
Arrange module, be connected with described measurement module, the chromaticity coordinate for the critical grey decision-making by described display screen to be regulated is set to the chromaticity coordinate of described maximum gray value;
Chromaticity coordinate computing module, respectively with described measurement module with describedly arrange model calling, for according to the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making and conventional display from minimum gray value to critical grey decision-making reference chromaticity coordinate, calculate respectively described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making; And
Colourity adjustment module, is connected with described chromaticity coordinate computing module, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the chromaticity coordinate of each grey decision-making, regulate the colourity of described display screen to be regulated.
7. device according to claim 6, is characterized in that, described chromaticity coordinate computing module comprises:
First chromaticity coordinate computing module, for according to the first chromaticity coordinate in the first chromaticity coordinate in the reference chromaticity coordinate of described conventional display, the minimum gray value of described display screen to be regulated and the chromaticity coordinate of critical grey decision-making, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making;
Second chromaticity coordinate computing module, be connected with described first chromaticity coordinate computing module, for according to described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making, described conventional display reference chromaticity coordinate the first chromaticity coordinate and the second chromaticity coordinate, calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making.
8. device according to claim 7, is characterized in that, described first chromaticity coordinate computing module adopt following formula 1 calculate described display screen to be regulated from minimum gray value to critical grey decision-making the first chromaticity coordinate of each grey decision-making,
Wherein, M is minimum gray value, and N is critical grey decision-making, M<i<N and be integer;
X
mrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display, x
irepresent described conventional display from the first chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x
nrepresent the first chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
X '
mrepresent the first chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated, x '
irepresent described display screen to be regulated from the first chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N, x '
nrepresent the first chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
9. device according to claim 8, is characterized in that, described second chromaticity coordinate computing module adopt following formula 2 calculate described display screen to be regulated from minimum gray value to critical grey decision-making the second chromaticity coordinate of each grey decision-making,
Wherein, d
m=y
m-x
m, y
mrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the minimum gray value M of described conventional display;
D
i=y
i-x
i, y
irepresent described conventional display from the second chromaticity coordinate the reference chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D
n=y
n-x
n, y
nrepresent the second chromaticity coordinate in the reference chromaticity coordinate of the critical grey decision-making N of described conventional display;
D'
m=y'
m-x'
m, y '
mrepresent the second chromaticity coordinate in the chromaticity coordinate of the minimum gray value M of described display screen to be regulated;
D '
i=y '
i-x '
i, y '
irepresent that described display screen to be regulated is from the second chromaticity coordinate the chromaticity coordinate of each grey decision-making i minimum gray value M to critical grey decision-making N;
D'
n=y'
n-x'
n, y '
nrepresent the second chromaticity coordinate in the chromaticity coordinate of the critical grey decision-making N of described display screen to be regulated.
10. the device according to any one of claim 6 to 9, is characterized in that, also comprises:
Select module, be connected with described chromaticity coordinate computing module, be positioned at the LCDs of intermediate value as described conventional display for selective light mathematic(al) parameter from multiple LCDs.
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