CN102779498B - 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

White balance of liquid crystal display module implementation method and system

Technical field

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

Background technology

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

The display effect design of LCM comprises a lot of parameter, and white balance design is wherein a kind of.LCM white balance primarily of the LED(Light Emitting Diode in backlight, light emitting diode) spectrum and liquid-crystalline glasses transmitance determine.The spectrum that the LED of every type sends is different, and the transmitance of the liquid-crystalline glasses of often kind of model to visible ray (wavelength is the light of 380 nanometer ~ 780 nanometers) different wave length part is also different, the liquid-crystalline glasses therefore with regard to determining different model needs the LED of collocation different model.After the design of traditional LCM white balance adopts the liquid-crystalline glasses choosing a model usually, the LED then by constantly changing different model selects satisfied color, but so operation waste a large amount of time and resource.

Summary of the invention

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

A kind of white balance of liquid crystal display module implementation method, comprises the following steps:

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

The white picture chromaticity coordinates that the LED of the liquid-crystalline glasses and different model that obtain described model arranges in pairs or groups, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates;

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

Wherein in an embodiment, the white picture chromaticity coordinates that the LED of liquid-crystalline glasses and different model that step obtains described model arranges in pairs or groups is that the transmitance of liquid-crystalline glasses by calculating described model respectively obtains with the product of the backlight spectra value of the LED of often kind of model.

Wherein in an embodiment, in the model of the liquid-crystalline glasses of described acquisition liquid crystal display module, and before step for the liquid-crystalline glasses target setting chromaticity coordinates of this model, also comprise step:

Set up the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance;

The step of the white picture chromaticity coordinates that the liquid-crystalline glasses of the described model of described acquisition and the LED of different model arrange in pairs or groups is specially:

The white picture chromaticity coordinates that the LED searching liquid-crystalline glasses and the different model obtaining described model according to the model of described liquid-crystalline glasses from described mapping relations arranges in pairs or groups.

Wherein in an embodiment, described set up in advance the model of liquid-crystalline glasses, the model of LED and both collocation white picture chromaticity coordinates mapping relations step before, also comprise step:

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

The backlight spectra value of the LED of described often kind of model is multiplied with the transmitance of the liquid-crystalline glasses of often kind of model and obtains the white picture chromaticity coordinates of both collocation.

Wherein in an embodiment, described target color coordinates is the chromaticity coordinates of 1976 color spaces, and described white picture chromaticity coordinates is the chromaticity coordinates of 1931 color spaces, and the step of the aberration of each white picture chromaticity coordinates of described acquisition and target color coordinates is specially:

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

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

Wherein in an embodiment, the described computing formula 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 formula (1), white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z);

The computing formula obtaining 1976 color space chromaticity coordinatess corresponding to each white picture chromaticity coordinates according to the tristimulus values of described 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 formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L ^*be brightness values corresponding to 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of reference color coordinate of setting;

The computing formula obtaining the distance value of 1976 color space chromaticity coordinatess corresponding to 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 formula (3), Δ E _abfor aberration, Δ L ^*for the difference of the brightness value that white picture chromaticity coordinates the is corresponding brightness value corresponding with target color coordinates, and Δ L ^*be 0, Δ a ^*for the difference of the white horizontal ordinate of picture chromaticity coordinates and the horizontal ordinate of target color coordinates, Δ b ^*for the difference of the white ordinate of picture chromaticity coordinates and the ordinate of target color coordinates.

In addition, there is a need to provide a kind of to save time and the white balance of liquid crystal display module of resource realizes system.

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

Acquisition module, for obtaining the model of the liquid-crystalline glasses of liquid crystal display module, and for the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Processing module, the white picture chromaticity coordinates that the LED for the liquid-crystalline glasses and different model that obtain described model arranges in pairs or groups, and the aberration obtaining each white picture chromaticity coordinates and target color coordinates;

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

Wherein in an embodiment, also comprise:

Creation module, for setting up the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance;

Described processing module is also for white picture chromaticity coordinates that the LED searching liquid-crystalline glasses and the different model obtaining described model according to the model of described liquid-crystalline glasses from described mapping relations arranges in pairs or groups.

Wherein in an embodiment, also comprise:

Acquisition module, for the transmitance of the liquid-crystalline glasses of the backlight spectra value and often kind of model that obtain the LED of often kind of model;

Build module, being multiplied with the transmitance of the liquid-crystalline glasses of often kind of model for the backlight spectra value of the LED by described often kind of model obtains the white picture chromaticity coordinates of both collocation.

Wherein in an embodiment, described target color coordinates is the chromaticity coordinates of 1976 color spaces, and described white picture chromaticity coordinates is the chromaticity coordinates of 1931 color spaces, and described processing module comprises:

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

Aberration processing unit, for obtaining the distance value of 1976 color space chromaticity coordinatess corresponding to each white picture chromaticity coordinates and target color coordinates, described distance value is corresponding white picture chromaticity coordinates and the aberration of target color coordinates.

Above-mentioned white balance of liquid crystal display module implementation method and system, the white picture chromaticity coordinates that the LED getting itself and different model according to liquid-crystalline glasses model arranges in pairs or groups, 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 as liquid crystal display module, liquid-crystalline glasses model and LED type number are arranged in pairs or groups, good white balance can be obtained, so pick out the LED type number of arranging in pairs or groups with liquid-crystalline glasses model, constantly change compared with LED selects with traditional, save the time, and do not need the LED buying all models, only need buy the LED by testing the respective model chosen, provide cost savings.

Accompanying drawing explanation

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

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

Fig. 3 is the procedure chart obtaining LCM spectrogram;

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

Fig. 5 is the inner structure schematic diagram that in an embodiment, white balance of liquid crystal display module realizes system;

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

Fig. 7 is the inner structure schematic diagram that in another embodiment, white balance of liquid crystal display module realizes system.

Embodiment

Below in conjunction with specific embodiment and accompanying drawing, the technical scheme to white balance of liquid crystal display module implementation method and system is described in detail, to make it clearly.

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

Step S110, obtains the model of the liquid-crystalline glasses of liquid crystal display module, and for 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 as LCD001, resolution is 300 × 400, and transmitance is 6e ^-2deng, wherein, e is the end of natural logarithm, and the approximate value of e is 2.718.The target color coordinates of setting refers to the coordinate of the color of the predetermined white balance that will reach 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: the mapping relations of white picture chromaticity coordinates setting up the model of liquid-crystalline glasses, the model of LED and both collocation 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 model collocation of LED, three sets up mapping relations.The model of such as liquid-crystalline glasses is the model of LCD001, LED is LED001, and white picture chromaticity coordinates is (0.2783,0.2902), sets up the mapping relations between three.

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

Step S210, obtains the transmitance of the backlight spectra value of the LED of often kind of model and the liquid-crystalline glasses of often 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, spectrum be polychromatic light after dispersion system (as prism, grating) light splitting, by the pattern that the monochromatic light that dispersion is opened is arranged in order by wavelength (or frequency) size, full name is optical spectrum.Transmitance refers to and projects above object through the ratio of the radiation energy of object with the integrated radiant emittance projected on object.

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

Concrete, the backlight spectra value of the LED of often kind of model is obtained being multiplied with the transmitance of the liquid-crystalline glasses of often kind of model and obtains LCM spectrum, the i.e. white picture chromaticity coordinates of both collocation, as shown in Figure 3, in figure, LED light spectrogram and LCD transmitance figure obtain LCM spectrogram, in LED light spectrogram and LCM spectrogram, horizontal ordinate is visible wavelength (380 nanometer ~ 780 nanometer), ordinate is spectral value, in LCD transmitance figure, horizontal ordinate is visible wavelength (380 nanometer ~ 780 nanometer), and ordinate is transmitance.

The white picture chromaticity coordinates that step S 120, the LED of the liquid-crystalline glasses and different model that obtain this model arrange in pairs or groups, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates.

Concrete, establish the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance, then can search according to the model of liquid-crystalline glasses the white picture chromaticity coordinates that the LED that obtains this liquid-crystalline glasses and different model arranges in pairs or groups from mapping relations.Such as, the model of liquid-crystalline glasses is LCD001, search from mapping relations obtain LCD001 and LED001 collocation white picture chromaticity coordinates for (0.2783,0.2902), the white picture chromaticity coordinates that LCD001 and LED002 arranges in pairs or groups is (0.2766,0.3081) etc.

Step S120 can also adopt and otherwise realize, and the white picture chromaticity coordinates that the LED of the liquid-crystalline glasses and different model that namely obtain this model arranges in pairs or groups obtains by the product of the backlight spectra value of the LED of the transmitance Yu often kind of model that calculate the liquid-crystalline glasses of this model respectively.Concrete, after obtaining the model of liquid-crystalline glasses, obtain the transmitance of the liquid-crystalline glasses of this model, then the direct transmitance of this model liquid-crystalline glasses and the LED-backlit spectral value of often kind of model being multiplied can obtain corresponding white picture chromaticity coordinates, without the need to setting up mapping relations and searching.

As shown in Figure 4, in one embodiment, the step 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 color space chromaticity coordinatess corresponding to each white picture chromaticity coordinates according to the tristimulus values of correspondence.

Because of the chromaticity coordinates that the white picture chromaticity coordinates calculated is 1931 color spaces, the chromaticity coordinates of 1976 color spaces need be converted to.

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

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

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

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

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

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

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

Concrete, calculate the formula of aberration such 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 formula (3), Δ E _abfor aberration, Δ L ^*for the difference of the brightness value that white picture chromaticity coordinates the is corresponding brightness value corresponding with target color coordinates, Δ a ^*for the difference of the white horizontal ordinate of picture chromaticity coordinates and the horizontal ordinate of target color coordinates, Δ b ^*for the difference of the white ordinate of picture chromaticity coordinates and the ordinate of target color coordinates, when calculating aberration, do not consider luminance factor, therefore brightness value L corresponding for 1976 color space chromaticity coordinates values of the brightness value of target color coordinates and each white picture chromaticity coordinates ^*all be set to 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, select LED as the back light of liquid crystal display module.

Concrete, after getting the aberration of white picture chromaticity coordinates corresponding to the LED of often kind of model and target color coordinates, aberration is sorted, chooses the model of the minimum several LED of aberration by order from small to large, in the model of several LED, select LED as the back light of liquid crystal display module.Predetermined number can set as required, as five.

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

Load module 10 is for the target color coordinates of the model and setting that obtain 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, liquid crystal display) display.The model of LCD has multiple, and as LCD001, resolution is 300 × 400, and transmitance is 6e ^-2deng.The target color coordinates of setting refers to the coordinate of the color of the predetermined white balance that will reach can set as required.

The white picture chromaticity coordinates that processing module 20 is arranged in pairs or groups for the LED of the liquid-crystalline glasses and different model that obtain this model, and obtain 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 unit 210 and aberration processing unit 220.Wherein:

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

Because of the chromaticity coordinates that the white picture chromaticity coordinates calculated is 1931 color spaces, the chromaticity coordinates of 1976 color spaces need be converted to.

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

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

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

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

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

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

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

Concrete, calculate the formula of aberration such 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 formula (3), Δ E _abfor aberration, Δ L ^*for the difference of the brightness value that white picture chromaticity coordinates the is corresponding brightness value corresponding with target color coordinates, Δ a ^*for the difference of the white horizontal ordinate of picture chromaticity coordinates and the horizontal ordinate of target color coordinates, Δ b ^*for the difference of the white ordinate of picture chromaticity coordinates and the ordinate of target color coordinates, when calculating aberration, do not consider luminance factor, therefore brightness value L corresponding for 1976 color space chromaticity coordinates values of the brightness value of target color coordinates and each white picture chromaticity coordinates ^*all be set to 100, then Δ L ^*=0.Chosen module 30 for choosing the model of the LED of predetermined number from small to large by aberration, and selects LED as the back light of liquid crystal display module in the model of the LED of predetermined number.Concrete, after getting the aberration of white picture chromaticity coordinates corresponding to the LED of often kind of model and target color coordinates, aberration is sorted, chooses the model of the minimum several LED of aberration by order from small to large, in the model of several LED, select LED as the back light of liquid crystal display module.Predetermined number can set as required, as five.

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

Acquisition module 40 is for the transmitance of the liquid-crystalline glasses of the backlight spectra value and often kind of model that obtain the LED of often 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, spectrum be polychromatic light after dispersion system (as prism, grating) light splitting, by the pattern that the monochromatic light that dispersion is opened is arranged in order by wavelength (or frequency) size, full name is optical spectrum.Transmitance refers to and projects above object through the ratio of the radiation energy of object with the integrated radiant emittance projected on object.

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

Concrete, build module 50 the backlight spectra value of the LED of often kind of model is obtained being multiplied with the transmitance of the liquid-crystalline glasses of often kind of model to obtain LCM spectrum, the i.e. white picture chromaticity coordinates of both collocation, as shown in Figure 3, in figure, LED light spectrogram and LCD transmitance figure obtain LCM spectrogram, in LED light spectrogram and LCM spectrogram, horizontal ordinate is visible wavelength (380 nanometer ~ 780 nanometer), ordinate is spectral value, in LCD transmitance figure, horizontal ordinate is visible wavelength (380 nanometer ~ 780 nanometer), and ordinate is transmitance.

Creation module 60 is for setting up the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation 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 model collocation of LED, three sets up mapping relations.The model of such as liquid-crystalline glasses is the model of LCD001, LED is LED001, and white picture chromaticity coordinates is (0.2783,0.2902), sets up the mapping relations between three.

Processing module 20 is also for white picture chromaticity coordinates that the LED searching liquid-crystalline glasses and the different model obtaining described model according to the model of described liquid-crystalline glasses from described mapping relations arranges in pairs or groups.Concrete, establish the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance, then can search according to the model of liquid-crystalline glasses the white picture chromaticity coordinates that the LED that obtains this liquid-crystalline glasses and different model arranges in pairs or groups from mapping relations.Such as, the model of liquid-crystalline glasses is LCD001, search from mapping relations obtain LCD001 and LED001 collocation white picture chromaticity coordinates for (0.2783,0.2902), the white picture chromaticity coordinates that LCD001 and LED002 arranges in pairs or groups is (0.2766,0.3081) etc.

In other embodiments, white balance of liquid crystal display module realizes system and also can not comprise acquisition module 40, build module 50 and creation 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 and the LED-backlit spectral value of often kind of model be multiplied and obtain corresponding white picture chromaticity coordinates.

Above-mentioned white balance of liquid crystal display module implementation method and system, the white picture chromaticity coordinates that the LED getting itself and different model according to liquid-crystalline glasses model arranges in pairs or groups, 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 as liquid crystal display module, liquid-crystalline glasses model and LED type number are arranged in pairs or groups, good white balance can be obtained, so pick out the LED type number of arranging in pairs or groups with liquid-crystalline glasses model, constantly change compared with LED selects with traditional, save the time, and do not need the LED buying all models, only need buy the LED by testing the respective model chosen, provide cost savings, and because of appropriate mix, decrease the sample presentation number of times because white balance problem causes, improve the success ratio of a sample presentation, reduce sample presentation cost, the product that also rapid output can be needed satisfied according to client.

In addition, adopt the mode setting up mapping relations in advance, fast and easy can obtain corresponding white picture chromaticity coordinates.

Above-mentioned white balance of liquid crystal display module implementation method and system are applied in actual design and achieve good result, as shown in the table.

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

Claims (8)

1. a white balance of liquid crystal display module implementation method, comprises the following steps:

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

The white picture chromaticity coordinates that the LED of the liquid-crystalline glasses and different model that obtain described model arranges in pairs or groups, and obtain the aberration of each white picture chromaticity coordinates and target color coordinates;

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

The white picture chromaticity coordinates that the LED of liquid-crystalline glasses and different model that step obtains described model arranges in pairs or groups is that the transmitance of liquid-crystalline glasses by calculating described model respectively obtains with the product of the backlight spectra value of the LED of often kind of model.

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

Set up the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance;

The step of the white picture chromaticity coordinates that the liquid-crystalline glasses of the described model of described acquisition and the LED of different model arrange in pairs or groups is specially:

The white picture chromaticity coordinates that the LED searching liquid-crystalline glasses and the different model obtaining described model according to the model of described liquid-crystalline glasses from described mapping relations arranges in pairs or groups.

3. white balance of liquid crystal display module implementation method according to claim 2, is characterized in that, described set up in advance the model of liquid-crystalline glasses, the model of LED and both collocation white picture chromaticity coordinates mapping relations step before, also comprise step:

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

The backlight spectra value of the LED of described often kind of model and the transmitance of the liquid-crystalline glasses of often kind of model are multiplied respectively and obtain the white picture chromaticity coordinates of both collocation.

4. white balance of liquid crystal display module implementation method according to any one of claim 1 to 3, it is characterized in that, described target color coordinates is the chromaticity coordinates of 1976 color spaces, described white picture chromaticity coordinates is the chromaticity coordinates of 1931 color spaces, and the step of the aberration of each white picture chromaticity coordinates of described acquisition and target color coordinates is specially:

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

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

5. white balance of liquid crystal display module implementation method according to claim 4, is characterized in that, the described computing formula 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 formula (1), white picture chromaticity coordinates (x, y), tristimulus values (X, Y, Z);

The computing formula obtaining 1976 color space chromaticity coordinatess corresponding to each white picture chromaticity coordinates according to the tristimulus values of described 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 formula (2), 1976 color space chromaticity coordinates value (a ^*, b ^*), L ^*be brightness values corresponding to 1976 color space chromaticity coordinates values, (X _n, Y _n, Z _n) be the tristimulus values of reference color coordinate of setting;

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

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

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

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

Acquisition module, for the transmitance of the liquid-crystalline glasses of the backlight spectra value and often kind of model that obtain the LED of often kind of model;

Build module, being multiplied respectively for the backlight spectra value of the LED by described often kind of model and the transmitance of the liquid-crystalline glasses of often kind of model obtains the white picture chromaticity coordinates of both collocation;

Acquisition module, for obtaining the model of the liquid-crystalline glasses of liquid crystal display module, and for the liquid-crystalline glasses target setting chromaticity coordinates of this model;

Processing module, the white picture chromaticity coordinates that the LED for the liquid-crystalline glasses and different model that obtain described model arranges in pairs or groups, and the aberration obtaining each white picture chromaticity coordinates and target color coordinates;

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

7. white balance of liquid crystal display module according to claim 6 realizes system, it is characterized in that, also comprises:

Creation module, for setting up the mapping relations of white picture chromaticity coordinates of the model of liquid-crystalline glasses, the model of LED and both collocation in advance;

Described processing module is also for white picture chromaticity coordinates that the LED searching liquid-crystalline glasses and the different model obtaining described model according to the model of described liquid-crystalline glasses from described mapping relations arranges in pairs or groups.

8. the white balance of liquid crystal display module according to any one of claim 6 to 7 realizes system, it is characterized in that, described target color coordinates is the chromaticity coordinates of 1976 color spaces, and described white picture chromaticity coordinates is the chromaticity coordinates of 1931 color spaces, and described processing module comprises:

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

Aberration processing unit, for obtaining the distance value of 1976 color space chromaticity coordinatess corresponding to each white picture chromaticity coordinates and target color coordinates, described distance value is corresponding white picture chromaticity coordinates and the aberration of target color coordinates.