CN102779498A - Method and system for realizing white balance of liquid crystal display module - Google Patents

Abstract

The invention relates to a method and a system for realizing white balance of a liquid crystal display module. The method for realizing the white balance of the liquid crystal display module comprises the following steps: obtaining the size of liquid crystal glass of the liquid crystal display module and setting a target color coordinate according to the size of the liquid crystal glass; obtaining a white frame color coordinate with the liquid crystal glass in the size matched with LEDs (Light Emitting Diodes) in different sizes and obtaining a chromatic aberration between each white frame color coordinate and the target color coordinate; selecting the sizes of a preset quantity of LEDs from small to big according to the chromatic aberration; and selecting an LED from the preset quantity of LEDs in the sizes as a backlight source of the liquid crystal display module. According to the method and the system for realizing the white balance of the liquid crystal display module, the LEDs matched with the liquid crystal glass in size are selected; compared with the traditional selection by continuously exchanging the LEDs, the method has the advantage that the time is saved; and the LEDs in all sizes are not needed to be purchased and only the tested and selected LEDs in the corresponding sizes are purchased, so that the cost is saved.

Description

Liquid crystal display module white balance implementation method and system

Technical field

The present invention relates to field of liquid crystal display, particularly relate to a kind of liquid crystal display module white balance implementation method and system.

Background technology

LCM (Liquid Crystal Display Module, liquid crystal display module) mainly is made up of backlight, liquid-crystalline glasses, polaroid, integrated circuit, FPC.The design of LCM mainly comprises structural design, Electronic Design and display effect design, and wherein, display effect is designed to characteristic the most intuitively.

The display effect design of LCM comprises a lot of parameters, and the white balance design is wherein a kind of.The LCM white balance is mainly determined by the spectrum of the LED in backlight (Light Emitting Diode, light emitting diode) and the transmitance of liquid-crystalline glasses.The spectrum that every type LED sends is different; And the liquid-crystalline glasses of every kind of model is also different to the transmitance of visible light (wavelength is the light of 380 nanometers ~ 780 nanometers) different wave length part, has therefore just determined need the arrange in pairs or groups LED of different model of the liquid-crystalline glasses of different model.After the design of traditional LCM white balance was adopted usually and chosen the liquid-crystalline glasses of a model, the LED through continuous replacing different model selected satisfied color then, but so great amount of time and resource are wasted in operation.

Summary of the invention

Based on this, be necessary to provide a kind of liquid crystal display module white balance implementation method that can save time with resource.

A kind of liquid crystal display module white balance implementation method may further comprise the steps:

Obtain the model of the liquid-crystalline glasses of liquid crystal display module, and be directed against the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of said model, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates;

Choose the model of the LED of predetermined number from small to large by aberration, and in the model of the LED of predetermined number, select the back light of LED as the liquid crystal display module.

Therein among embodiment, the white picture chromaticity coordinates of LED collocation that step is obtained liquid-crystalline glasses and the different model of said model is that the product through the backlight spectra value of the LED of the transmitance of the liquid-crystalline glasses that calculates said model respectively and every kind of model obtains.

Therein among embodiment,, and before the step to the liquid-crystalline glasses target setting chromaticity coordinates of this model, also comprise step in the said model of obtaining the liquid-crystalline glasses of liquid crystal display module:

Set up the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups in advance;

The step of the white picture chromaticity coordinates of the LED collocation of said liquid-crystalline glasses that obtains said model and different model is specially:

From said mapping relations, search the white picture chromaticity coordinates of the LED collocation of the liquid-crystalline glasses that obtains said model and different model according to the model of said liquid-crystalline glasses.

Therein among embodiment, before the step of the mapping relations of the white picture chromaticity coordinates of the model of the said model of setting up liquid-crystalline glasses in advance, LED and both collocation, also comprise step:

Obtain the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model;

The transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of said every kind of model and every kind of model multiplied each other obtain the white picture chromaticity coordinates of both collocation.

Among embodiment, said target color coordinates is the chromaticity coordinates of 1976 color spaces therein, the chromaticity coordinates that said white picture chromaticity coordinates is 1931 color spaces, and the said step of obtaining the aberration of each white picture chromaticity coordinates and target color coordinates is specially:

Obtain corresponding tristimulus values according to each white picture chromaticity coordinates, obtain 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence;

Obtain the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, with said distance value as the white picture chromaticity coordinates of correspondence and the aberration of target color coordinates.

Therein among embodiment, the said computing formula of obtaining corresponding tristimulus values according to each white picture chromaticity coordinates is formula (1):

$\left\{\begin{array}{c}X=100*\frac{x}{y}\\ Y=100\\ Z=100*\frac{1-x-y}{y}\end{array}\right.---\left(1\right)$

In the formula (1), and white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z);

The computing formula of obtaining 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence is formula (2):

$\left\{\begin{array}{c}{L}^{*}=116{\left(\frac{Y}{Y_n}\right)}^{1/3}-16\\ a^{*}=500[{\left(\frac{X}{X_n}\right)}^{1/3}-{\left(\frac{Y}{Y_n}\right)}^{1/3}]\\ b^{*}=200[{\left(\frac{Y}{Y_n}\right)}^{1/3}-{\left(\frac{Z}{Z_n}\right)}^{1/3}]\end{array}\right.---\left(2\right)$

In the formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L ^*Be the corresponding brightness values of 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of the reference color coordinate of setting;

The computing formula of obtaining the distance value of 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and target color coordinates is formula (3):

${\mathrm{\ΔE}}_{\mathrm{ab}}=\sqrt{{\left(\mathrm{\Δ}{L}^{*}\right)}^2+{\left(\mathrm{\Δ}{a}^{*}\right)}^2+{\left(\mathrm{\Δ}{b}^{*}\right)}^2}---\left(3\right)$

In the formula (3), Δ E _AbBe aberration, Δ L ^*Be the difference of the corresponding brightness value of the white picture chromaticity coordinates brightness value corresponding with target color coordinates, and Δ L ^*Be 0, Δ a ^*Be the difference of the horizontal ordinate of the horizontal ordinate of white picture chromaticity coordinates and target color coordinates, Δ b ^*Difference for the ordinate of the ordinate of white picture chromaticity coordinates and target color coordinates.

In addition, also be necessary to provide a kind of liquid crystal display module white balance that can save time with resource to realize system.

A kind of liquid crystal display module white balance realizes system, comprising:

Acquisition module is used to obtain the model of the liquid-crystalline glasses of liquid crystal display module, and to the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Processing module is used to obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of said model, and obtains the aberration of each white picture chromaticity coordinates and target color coordinates;

Chosen module is used for choosing from small to large by aberration the model of the LED of predetermined number, and in the model of the LED of predetermined number, selects the back light of LED as the liquid crystal display module.

Among embodiment, also comprise therein:

Create module, be used for setting up in advance the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups;

Said processing module also is used for searching from said mapping relations according to the model of said liquid-crystalline glasses the white picture chromaticity coordinates of the LED collocation of the liquid-crystalline glasses that obtains said model and different model.

Among embodiment, also comprise therein:

Acquisition module is used to obtain the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model;

Build module, be used for transmitance with the liquid-crystalline glasses of the backlight spectra value of the LED of said every kind of model and every kind of model and multiply each other and obtain the white picture chromaticity coordinates of both collocation.

Among embodiment, said target color coordinates is the chromaticity coordinates of 1976 color spaces therein, the chromaticity coordinates that said white picture chromaticity coordinates is 1931 color spaces, and said processing module comprises:

Coordinate transformation unit is used for obtaining corresponding tristimulus values according to each white picture chromaticity coordinates, obtains 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence;

The aberration processing unit is used to obtain the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, and said distance value is the corresponding white picture chromaticity coordinates and the aberration of target color coordinates.

Above-mentioned liquid crystal display module white balance implementation method and system get access to the white picture chromaticity coordinates of the LED collocation of itself and different model according to the liquid-crystalline glasses model, ask for the aberration of the target color coordinates of white picture chromaticity coordinates and setting; Choose the back light of the little LED of aberration, make the collocation of liquid-crystalline glasses model and LED model can obtain white balance preferably as the liquid crystal display module; So pick out LED model with the collocation of liquid-crystalline glasses model; Select with traditional continuous replacing LED and to compare, saved the time, and need not buy the LED of all models; Only need to buy the LED of the respective model of choosing through test, provide cost savings.

Description of drawings

Fig. 1 is the process flow diagram of liquid crystal display module white balance implementation method among the embodiment;

Fig. 2 is the process flow diagram of white picture chromaticity coordinates of liquid-crystalline glasses collocation of backlight spectra value and different model that obtains the LED of different model;

Fig. 3 is the procedure chart that obtains the LCM spectrogram;

Fig. 4 is the particular flow sheet of step that obtains the aberration of each white picture chromaticity coordinates and target color coordinates;

Fig. 5 is the inner structure synoptic diagram that liquid crystal display module white balance realizes system among the embodiment;

Fig. 6 is the inner structure synoptic diagram of processing module;

Fig. 7 is the inner structure synoptic diagram that liquid crystal display module white balance realizes system among another embodiment.

Embodiment

Below in conjunction with concrete embodiment and accompanying drawing the technical scheme of liquid crystal display module white balance implementation method and system is carried out detailed description, so that it is clearer.

As shown in Figure 1, in one embodiment, a kind of liquid crystal display module white balance implementation method may further comprise the steps:

Step S110 obtains the model of the liquid-crystalline glasses of liquid crystal display module, and is directed against the liquid-crystalline glasses target setting chromaticity coordinates of this model.

Concrete, the model of the liquid-crystalline glasses of liquid crystal display module has multiple, and like LCD001, resolution is 300 * 400, and transmitance is 6e ^-2Deng, wherein, e is the end of natural logarithm, the approximate value of e is 2.718.The target color coordinates of setting is meant the coordinate of the color of the predetermined white balance that will reach, and can set as required.This target color coordinates is the chromaticity coordinates of 1976 color spaces.

In one embodiment, before step S110, also comprise step: set up the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups in advance.

Concrete, the white picture chromaticity coordinates of the model of the model of liquid-crystalline glasses, the model of LED and liquid-crystalline glasses and the collocation of the model of LED, the three sets up mapping relations.For example the model of liquid-crystalline glasses is LCD001, and the model of LED is LED001, and white picture chromaticity coordinates is (0.2783,0.2902), sets up the mapping relations between the three.

In one embodiment, as shown in Figure 2, before the step of the mapping relations of the white picture chromaticity coordinates of the model of the model of setting up liquid-crystalline glasses in advance, LED and both collocation, also comprise step:

Step S210 obtains the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model.

Concrete, the backlight spectra value of the LED of different model is different, and the transmitance of the liquid-crystalline glasses of different model is also different.Wherein, after spectrum is the beam split of polychromatic light process dispersion system (like prism, grating), the pattern that the monochromatic light of being opened by chromatic dispersion is arranged in order by wavelength (or frequency) size, full name is an optical spectrum.Transmitance is meant and projects the radiation energy and the ratio that projects the integrated radiant emittance on the object that sees through object above the object.

Step S220, the transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of every kind of model and every kind of model multiplied each other obtains the white picture chromaticity coordinates of both collocation.

Concrete; The transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of every kind of model and every kind of model obtained multiplying each other obtain LCM spectrum; Be the white picture chromaticity coordinates that both arrange in pairs or groups, as shown in Figure 3, LED spectrogram and LCD transmitance figure obtain the LCM spectrogram among the figure; Horizontal ordinate is visible wavelength (380 nanometers ~ 780 nanometers) in LED spectrogram and the LCM spectrogram; Ordinate is a spectral value, and horizontal ordinate is visible wavelength (380 nanometers ~ 780 nanometers) among the LCD transmitance figure, and ordinate is a transmitance.

Step S 120, obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of this model, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates.

Concrete; Set up the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups in advance, then can from mapping relations, search the white picture chromaticity coordinates of the LED collocation that obtains this liquid-crystalline glasses and different model according to the model of liquid-crystalline glasses.For example, the model of liquid-crystalline glasses is LCD001, from mapping relations, searches the white picture chromaticity coordinates that obtains LCD001 and LED001 collocation and is (0.2783,0.2902), and the white picture chromaticity coordinates that LCD001 and LED002 arrange in pairs or groups is (0.2766,0.3081) etc.

Step S120 can also adopt otherwise and to realize, the product of the backlight spectra value of the transmitance of the liquid-crystalline glasses that the white picture chromaticity coordinates that the liquid-crystalline glasses that promptly obtains this model and the LED of different model arrange in pairs or groups can be through calculating this model respectively and the LED of every kind of model obtains.Concrete; After obtaining the model of liquid-crystalline glasses; Obtain the transmitance of the liquid-crystalline glasses of this model, directly the transmitance of this model liquid-crystalline glasses being multiplied each other with the LED-backlit spectral value of every kind of model then to obtain corresponding white picture chromaticity coordinates, need not to set up mapping relations and searches.

As shown in Figure 4, in one embodiment, the step of obtaining the aberration of each white picture chromaticity coordinates and target color coordinates specifically comprises:

Step S410 obtains corresponding tristimulus values according to each white picture chromaticity coordinates, obtains 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of correspondence.

Because of the chromaticity coordinates that the white picture chromaticity coordinates of calculating is 1931 color spaces, need convert the chromaticity coordinates of 1976 color spaces to.

The computing formula of obtaining corresponding tristimulus values according to each white picture chromaticity coordinates is suc as formula (1):

$\left\{\begin{array}{c}X=100*\frac{x}{y}\\ Y=100\\ Z=100*\frac{1-x-y}{y}\end{array}\right.---\left(1\right)$

In the formula (1), and white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z).

The computing formula of obtaining 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of correspondence is suc as formula (2):

$\left\{\begin{array}{c}{L}^{*}=116{\left(\frac{Y}{Y_n}\right)}^{1/3}-16\\ a^{*}=500[{\left(\frac{X}{X_n}\right)}^{1/3}-{\left(\frac{Y}{Y_n}\right)}^{1/3}]\\ b^{*}=200[{\left(\frac{Y}{Y_n}\right)}^{1/3}-{\left(\frac{Z}{Z_n}\right)}^{1/3}]\end{array}\right.---\left(2\right)$

In the formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L ^*Be the corresponding brightness values of 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of the reference color coordinate (the reference white point of promptly setting) of setting.In the present embodiment, the tristimulus values of reference color coordinate (0.283,0.297) (95.29,100,141.41).

Step S420 obtains the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, with distance value as the white picture chromaticity coordinates of correspondence and the aberration of target color coordinates.

Concrete, the formula that calculates aberration is suc as formula (3):

${\mathrm{\ΔE}}_{\mathrm{ab}}=\sqrt{{\left(\mathrm{\Δ}{L}^{*}\right)}^2+{\left(\mathrm{\Δ}{a}^{*}\right)}^2+{\left(\mathrm{\Δ}{b}^{*}\right)}^2}---\left(3\right)$

In the formula (3), Δ E _AbBe aberration, Δ L ^*Be the difference of the corresponding brightness value of the white picture chromaticity coordinates brightness value corresponding, Δ a with target color coordinates ^*Be the difference of the horizontal ordinate of the horizontal ordinate of white picture chromaticity coordinates and target color coordinates, Δ b ^*For the difference of ordinate with the ordinate of target color coordinates of white picture chromaticity coordinates, do not consider luminance factor when calculating aberration, therefore the brightness value L of 1976 color space chromaticity coordinates values correspondence of the brightness value of target color coordinates and each white picture chromaticity coordinates ^*All be made as 100, then Δ L ^*=0.

Step S130 chooses the model of the LED of predetermined number from small to large by aberration, and in the model of the LED of predetermined number, selects the back light of LED as the liquid crystal display module.

Concrete; After getting access to the aberration of corresponding white picture chromaticity coordinates of the LED of every kind of model and target color coordinates; Aberration is sorted, choose the model of several kinds of minimum LED of aberration, in the model of several kinds of LED, select the back light of LED as the liquid crystal display module by order from small to large.Predetermined number can be set as required, as five.

As shown in Figure 5, in one embodiment, a kind of liquid crystal display module white balance realizes system, comprises module 10, processing module 20, chosen module 30.Wherein:

Load module 10 is used to obtain model and the target color coordinates of setting of the liquid-crystalline glasses of liquid crystal display module.Concrete, the liquid-crystalline glasses of liquid crystal display module, i.e. LCD (Liquid Crystal Display, LCD) display.The model of LCD has multiple, and like LCD001, resolution is 300 * 400, and transmitance is 6e ^-2Deng.The target color coordinates of setting is meant the coordinate of the color of the predetermined white balance that will reach, and can set as required.

Processing module 20 is used to obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of this model, and obtains the aberration of each white picture chromaticity coordinates and target color coordinates.

As shown in Figure 6, in one embodiment, processing module 20 coordinate transformation units 210 and aberration processing unit 220.Wherein:

Coordinate transformation unit 210 is used for obtaining corresponding tristimulus values according to each white picture chromaticity coordinates, obtains 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of correspondence.

Because of the chromaticity coordinates that the white picture chromaticity coordinates of calculating is 1931 color spaces, need convert the chromaticity coordinates of 1976 color spaces to.

The computing formula of obtaining corresponding tristimulus values according to each white picture chromaticity coordinates is suc as formula (1):

$\left\{\begin{array}{c}X=100*\frac{x}{y}\\ Y=100\\ Z=100*\frac{1-x-y}{y}\end{array}\right.---\left(1\right)$

In the formula (1), and white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z).

The computing formula of obtaining 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of correspondence is suc as formula (2):

$\left\{\begin{array}{c}{L}^{*}=116{\left(\frac{Y}{Y_n}\right)}^{1/3}-16\\ a^{*}=500[{\left(\frac{X}{X_n}\right)}^{1/3}-{\left(\frac{Y}{Y_n}\right)}^{1/3}]\\ b^{*}=200[{\left(\frac{Y}{Y_n}\right)}^{1/3}-{\left(\frac{Z}{Z_n}\right)}^{1/3}]\end{array}\right.---\left(2\right)$

In the formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L _*Be the corresponding brightness values of 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of the reference color coordinate (the reference white point of promptly setting) of setting.In the present embodiment, the tristimulus values of reference color coordinate (0.283,0.297) (95.29,100,141.41).

Aberration processing unit 220 is used to obtain the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, and said distance value is the corresponding white picture chromaticity coordinates and the aberration of target color coordinates.

Concrete, the formula that calculates aberration is suc as formula (3):

${\mathrm{\ΔE}}_{\mathrm{ab}}=\sqrt{{\left(\mathrm{\Δ}{L}^{*}\right)}^2+{\left(\mathrm{\Δ}{a}^{*}\right)}^2+{\left(\mathrm{\Δ}{b}^{*}\right)}^2}---\left(3\right)$

In the formula (3), Δ E _AbBe aberration, Δ L ^*Be the difference of the corresponding brightness value of the white picture chromaticity coordinates brightness value corresponding, Δ a with target color coordinates ^*Be the difference of the horizontal ordinate of the horizontal ordinate of white picture chromaticity coordinates and target color coordinates, Δ b ^*For the difference of ordinate with the ordinate of target color coordinates of white picture chromaticity coordinates, do not consider luminance factor when calculating aberration, therefore the brightness value L of 1976 color space chromaticity coordinates values correspondence of the brightness value of target color coordinates and each white picture chromaticity coordinates ^*All be made as 100, then Δ L ^*=0.Chosen module 30 is used for choosing from small to large by aberration the model of the LED of predetermined number, and in the model of the LED of predetermined number, selects the back light of LED as the liquid crystal display module.Concrete; After getting access to the aberration of corresponding white picture chromaticity coordinates of the LED of every kind of model and target color coordinates; Aberration is sorted, choose the model of several kinds of minimum LED of aberration, in the model of several kinds of LED, select the back light of LED as the liquid crystal display module by order from small to large.Predetermined number can be set as required, as five.

As shown in Figure 7, in one embodiment, above-mentioned liquid crystal display module white balance realizes system, except comprising load module 10, processing module 20 and chosen module 30, also comprises acquisition module 40, builds module 50 and creates module 60.

Acquisition module 40 is used to obtain the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model.

Concrete, the backlight spectra value of the LED of different model is different, and the transmitance of the liquid-crystalline glasses of different model is also different.Wherein, after spectrum is the beam split of polychromatic light process dispersion system (like prism, grating), the pattern that the monochromatic light of being opened by chromatic dispersion is arranged in order by wavelength (or frequency) size, full name is an optical spectrum.Transmitance is meant and projects the radiation energy and the ratio that projects the integrated radiant emittance on the object that sees through object above the object.

Build the white picture chromaticity coordinates that module 50 is used for obtaining according to the transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of every kind of model and every kind of model both collocation.

Concrete; Building module 50 obtains the transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of every kind of model and every kind of model to multiply each other and obtains LCM spectrum; Be the white picture chromaticity coordinates that both arrange in pairs or groups, as shown in Figure 3, LED spectrogram and LCD transmitance figure obtain the LCM spectrogram among the figure; Horizontal ordinate is visible wavelength (380 nanometers ~ 780 nanometers) in LED spectrogram and the LCM spectrogram; Ordinate is a spectral value, and horizontal ordinate is visible wavelength (380 nanometers ~ 780 nanometers) among the LCD transmitance figure, and ordinate is a transmitance.

Create model, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups that module 60 is used for setting up in advance liquid-crystalline glasses.Concrete, the white picture chromaticity coordinates of the model of the model of liquid-crystalline glasses, the model of LED and liquid-crystalline glasses and the collocation of the model of LED, the three sets up mapping relations.For example the model of liquid-crystalline glasses is LCD001, and the model of LED is LED001, and white picture chromaticity coordinates is (0.2783,0.2902), sets up the mapping relations between the three.

Processing module 20 also is used for searching from said mapping relations according to the model of said liquid-crystalline glasses the white picture chromaticity coordinates of the LED collocation of the liquid-crystalline glasses that obtains said model and different model.Concrete; Set up the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups in advance, then can from mapping relations, search the white picture chromaticity coordinates of the LED collocation that obtains this liquid-crystalline glasses and different model according to the model of liquid-crystalline glasses.For example, the model of liquid-crystalline glasses is LCD001, from mapping relations, searches the white picture chromaticity coordinates that obtains LCD001 and LED001 collocation and is (0.2783,0.2902), and the white picture chromaticity coordinates that LCD001 and LED002 arrange in pairs or groups is (0.2766,0.3081) etc.

In other embodiments, liquid crystal display module white balance realizes that system also can not comprise acquisition module 40, builds module 50 and create module 60.Obtain the model of liquid-crystalline glasses at acquisition module 10 after, directly by processing module 20 transmitance of this model liquid-crystalline glasses being multiplied each other with the LED-backlit spectral value of every kind of model obtains corresponding white picture chromaticity coordinates.

Above-mentioned liquid crystal display module white balance implementation method and system get access to the white picture chromaticity coordinates of the LED collocation of itself and different model according to the liquid-crystalline glasses model, ask for the aberration of the target color coordinates of white picture chromaticity coordinates and setting; Choose the back light of the little LED of aberration, make the collocation of liquid-crystalline glasses model and LED model can obtain white balance preferably as the liquid crystal display module; So pick out the LED model of arranging in pairs or groups, select with traditional continuous replacing LED and compare, saved the time with the liquid-crystalline glasses model; And need not buy the LED of all models, only need to buy the LED of the respective model of choosing through test, provide cost savings; And because of appropriate mix, reduced the sample presentation number of times that causes because of the white balance problem, improved the success ratio of a sample presentation; Reduce the sample presentation cost, also can be according to the satisfied product of the rapid output of client's needs.

In addition, adopt the mode of setting up mapping relations in advance, can make things convenient for and obtain corresponding white picture chromaticity coordinates fast.

Above-mentioned liquid crystal display module white balance implementation method and system applies have obtained good result in actual design, as shown in the table.

The LCD model	Target color coordinates	Actual white picture chromaticity coordinates
			LCDXXX	x:0.2783，y:0.2902，T:10262	x:0.2755，y:0.2885，T:10619
LCDXXX	x:0.2766，y:0.3081，T:9479	x:0.2788，y:0.3078，T:9319
			LCDXXX	x:0.3056，y:0.3265，T:6942	x:0.3037，y:0.3225，T:7101
LCDXXX	x:0.2979，y:0.3190，T:7526	x:0.3021，y:0.3193，T:7243
			LCDXXX	x:0.2925，y:0.3166，T:7946	x:0.2943，y:0.3169，T:7385

The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, 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 accompanying claims.

Claims (10)

1. liquid crystal display module white balance implementation method may further comprise the steps:

Obtain the model of the liquid-crystalline glasses of liquid crystal display module, and be directed against the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of said model, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates;

Choose the model of the LED of predetermined number from small to large by aberration, and in the model of the LED of predetermined number, select the back light of LED as the liquid crystal display module.

2. liquid crystal display module white balance implementation method according to claim 1; It is characterized in that the white picture chromaticity coordinates of LED collocation that step is obtained liquid-crystalline glasses and the different model of said model is that the product through the backlight spectra value of the LED of the transmitance of the liquid-crystalline glasses that calculates said model respectively and every kind of model obtains.

3. liquid crystal display module white balance implementation method according to claim 1 is characterized in that, before the step of the target color coordinates of the model of the said liquid-crystalline glasses that obtains the liquid crystal display module and setting, also comprises step:

Set up the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups in advance;

The step of the white picture chromaticity coordinates of the LED collocation of said liquid-crystalline glasses that obtains said model and different model is specially:

From said mapping relations, search the white picture chromaticity coordinates of the LED collocation of the liquid-crystalline glasses that obtains said model and different model according to the model of said liquid-crystalline glasses.

4. liquid crystal display module white balance implementation method according to claim 3 is characterized in that, before the step of the mapping relations of the white picture chromaticity coordinates of the model of the said model of setting up liquid-crystalline glasses in advance, LED and both collocation, also comprises step:

Obtain the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model;

The transmitance of the liquid-crystalline glasses of the backlight spectra value of the LED of said every kind of model and every kind of model multiplied each other respectively obtain the white picture chromaticity coordinates of both collocation.

5. according to each described liquid crystal display module white balance implementation method in the claim 1 to 4; It is characterized in that; Said target color coordinates is the chromaticity coordinates of 1976 color spaces; The chromaticity coordinates that said white picture chromaticity coordinates is 1931 color spaces, the said step of obtaining the aberration of each white picture chromaticity coordinates and target color coordinates is specially:

Obtain corresponding tristimulus values according to each white picture chromaticity coordinates, obtain 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence;

Obtain the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, with said distance value as the white picture chromaticity coordinates of correspondence and the aberration of target color coordinates.

6. liquid crystal display module white balance implementation method according to claim 5 is characterized in that, the said computing formula of obtaining corresponding tristimulus values according to each white picture chromaticity coordinates is formula (1):

$\left\{\begin{array}{c}X=100*\frac{x}{y}\\ Y=100\\ Z=100*\frac{1-x-y}{y}\end{array}\right.---\left(1\right)$

In the formula (1), and white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z);

The computing formula of obtaining 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence is formula (2):

$\left\{\begin{array}{c}{L}^{*}=116{\left(\frac{Y}{Y_n}\right)}^{1/3}-16\\ a^{*}=500[{\left(\frac{X}{X_n}\right)}^{1/3}-{\left(\frac{Y}{Y_n}\right)}^{1/3}]\\ b^{*}=200[{\left(\frac{Y}{Y_n}\right)}^{1/3}-{\left(\frac{Z}{Z_n}\right)}^{1/3}]\end{array}\right.---\left(2\right)$

In the formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L ^*Be the corresponding brightness values of 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of the reference color coordinate of setting;

The computing formula of obtaining the distance value of 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and target color coordinates is formula (3):

${\mathrm{\ΔE}}_{\mathrm{ab}}=\sqrt{{\left(\mathrm{\Δ}{L}^{*}\right)}^2+{\left(\mathrm{\Δ}{a}^{*}\right)}^2+{\left(\mathrm{\Δ}{b}^{*}\right)}^2}---\left(3\right)$

In the formula (3), Δ E _AbBe aberration, Δ L ^*Be the difference of the corresponding brightness value of the white picture chromaticity coordinates brightness value corresponding with target color coordinates, and Δ L ^*Be 0, Δ a ^*Be the difference of the horizontal ordinate of the horizontal ordinate of white picture chromaticity coordinates and target color coordinates, Δ b ^*Difference for the ordinate of the ordinate of white picture chromaticity coordinates and target color coordinates.

7. a liquid crystal display module white balance realizes system, it is characterized in that, comprising:

Acquisition module is used to obtain the model of the liquid-crystalline glasses of liquid crystal display module, and to the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Processing module is used to obtain the white picture chromaticity coordinates of LED collocation of liquid-crystalline glasses and the different model of said model, and obtains the aberration of each white picture chromaticity coordinates and target color coordinates;

Chosen module is used for choosing from small to large by aberration the model of the LED of predetermined number, and in the model of the LED of predetermined number, selects the back light of LED as the liquid crystal display module.

8. liquid crystal display module white balance according to claim 7 realizes system, it is characterized in that, also comprises:

Create module, be used for setting up in advance the model of liquid-crystalline glasses, the model of LED and the mapping relations of the white picture chromaticity coordinates that both arrange in pairs or groups;

Said processing module also is used for searching from said mapping relations according to the model of said liquid-crystalline glasses the white picture chromaticity coordinates of the LED collocation of the liquid-crystalline glasses that obtains said model and different model.

9. liquid crystal display module white balance according to claim 8 realizes system, it is characterized in that, also comprises:

Acquisition module is used to obtain the transmitance of liquid-crystalline glasses of backlight spectra value and every kind of model of the LED of every kind of model;

Build module, be used for transmitance with the liquid-crystalline glasses of the backlight spectra value of the LED of said every kind of model and every kind of model and multiply each other respectively and obtain the white picture chromaticity coordinates of both collocation.

10. realize system according to each described liquid crystal display module white balance in the claim 7 to 9; It is characterized in that; Said target color coordinates is the chromaticity coordinates of 1976 color spaces, the chromaticity coordinates that said white picture chromaticity coordinates is 1931 color spaces, and said processing module comprises:

Coordinate transformation unit is used for obtaining corresponding tristimulus values according to each white picture chromaticity coordinates, obtains 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates according to the tristimulus values of said correspondence;

The aberration processing unit is used to obtain the 1976 corresponding color space chromaticity coordinatess of each white picture chromaticity coordinates and the distance value of target color coordinates, and said distance value is the corresponding white picture chromaticity coordinates and the aberration of target color coordinates.

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