CN103617779A - Method and system for color balance calibration of white color - Google Patents

Abstract

The invention discloses a method and system for color balance calibration of white color. The method includes the steps of obtaining a parameter reference standard value, real-time brightness and chroma parameters, determining the color cast state according to the parameter reference standard value, the real-time brightness and chroma parameters, carrying out color adjustment and calibration on monochromatic brightness, one chroma parameter, white color brightness and one chroma parameter of an LED light machine until the white brightness and the chroma parameters of the display effect of the LED light machine are consistent with the parameter reference standard value, and maintaining the white color display effect of the LED light machine according to the monochromatic brightness, one chroma parameter, the white color brightness and one chroma parameter of the LED light machine after being calibrated. The method and system focus on adjustment of the white color of the display effect of the LED light machine and are supplemented by adjustment of monochromatic colors, so that the LED light machine can accurately achieve automatic maintenance of the display effect of the white color in operation, can prevent upward and downward oscillation of values of currents passing through an LED in the color adjusting and calibration process, shortens adjustment time, and guarantees stability of white color balance calibration operations.

Description

Color white balance calibration method and system

Technical field

The present invention relates to display screen technology field, especially relate to a kind of color white balance calibration method and system.

Background technology

In Information Visualization Technology, giant-screen digital jointing shows that the application of product is more and more extensive at present, and LED ray machine has occupied the leading position of giant-screen digital jointing demonstration product.Giant-screen digital jointing shows that product is in the middle of day-to-day operation process, in order to maintain its display brightness, colourity is constant, to obtain better display effect, need to keep the color of LED rear-projection ray machine picture disply, and in normal use procedure, the more important thing is maintaining the white picture display effect of LED rear-projection ray machine.

In actual applications, red (R), green (G), blue (B) or red (R), green (G), blue (B), yellow (Y), blue or green (C) monochrome form color white after mixing stack, by maintaining monochromatic color, guarantee white picture display effect, because red, green, blue, Huang, blue or green monochromatic brightness, colorimetric parameter collection value that Real-time Obtaining arrives are unstable, precision is poor, is therefore difficult to realize high-precision color and maintains; And in the color effect of LED rear-projection ray machine picture disply, white picture display effect is most important, by maintaining monochromatic color, indirectly to realize color white, maintain, in the case, while again each monochromatic deviation being added in white deviation jointly, can cause the less stable that maintains of white picture display effect.

Summary of the invention

Based on this, be necessary for the deficiencies in the prior art, a kind of color white balance calibration method and system are provided, the master that is adjusted to the color white of LED ray machine display effect, auxiliary with being adjusted to of red, green, blue or red, green, blue, Huang, blue or green monochromatic color, make LED ray machine in operational process, realize more accurately automatically maintaining of white displays effect.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of color white balance calibration method, it comprises the steps:

Obtain brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and it is made as respectively to monochromatic and white parameter reference data value;

Detect monochrome corresponding to LED ray machine display effect and white real-time luminosity, colorimetric parameter;

According to described parameter reference data value and real-time luminosity, colorimetric parameter, determine the colour cast state of LED ray machine display effect;

Under colour cast state, brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are carried out to color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

According to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white, maintain the white displays effect of LED ray machine.

Above-mentioned color white balance calibration method, in carrying out color adjustment calibration, to monochromatic brightness, the adjusting of colorimetric parameter and to white brightness, the adjusting of colorimetric parameter can exist and influence each other, in carrying out color adjustment calibration with white brightness, colorimetric parameter be adjusted to master, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, according to the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white brightness, colorimetric parameter is realized more accurately the white displays effect of LED ray machine is maintained, prevent from the flowing through current value of LED in color adjustment calibration process shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation.

A color white balance calibration system, it comprises:

Color memory module, for obtaining brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and is made as respectively monochromatic and white parameter reference data value by it;

Color detection module, for detection of detecting monochrome corresponding to LED ray machine display effect and white real-time luminosity, colorimetric parameter;

Color comparison module, for determining the colour cast state of LED ray machine display effect according to parameter reference data value and real-time luminosity, colorimetric parameter;

Colorific adjustment module, for brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are carried out to color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Color maintains module, for maintain the white displays effect of LED ray machine according to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white.

Above-mentioned color white balance calibration system, color comparison module judges LED ray machine display effect according to parameter reference data value and real-time luminosity, colorimetric parameter, the monochromatic brightness of colorific adjustment module to the LED ray machine under colour cast state, colorimetric parameter and white brightness, colorimetric parameter carries out color adjustment calibration, in carrying out color adjustment calibration with white brightness, colorimetric parameter be adjusted to master, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, color maintains module according to the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white brightness, colorimetric parameter is realized more accurately the white displays effect of LED ray machine is maintained, prevent from the flowing through current value of LED in color adjustment calibration process shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of color white balance calibration method of the present invention;

Fig. 2 is the structural representation of color white balance calibration system of the present invention;

Fig. 3 is another structural representation of color white balance calibration system of the present invention.

Embodiment

For further understanding feature of the present invention, technological means and the specific purposes that reach, function, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.

As shown in Figure 1, color white balance calibration method of the present invention, specifically comprises the steps:

Step S1, obtain brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and it is made as respectively to monochromatic and white parameter reference data value;

Step S2, monochromatic and white real-time luminosity, colorimetric parameter corresponding to detection LED ray machine display effect;

Step S3, according to described parameter reference data value and real-time luminosity, colorimetric parameter, determine the colour cast state of LED ray machine display effect;

Step S4, under colour cast state, monochromatic brightness to LED ray machine, colorimetric parameter and white brightness, colorimetric parameter carries out color adjustment calibration, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, according to the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white brightness, colorimetric parameter is realized more accurately the white displays effect of LED ray machine is maintained, prevent from the flowing through current value of LED in color adjustment calibration process shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation,

Wherein, under colour cast state, brightness, colorimetric parameter to the monochromatic brightness of LED ray machine, colorimetric parameter and white carry out color adjustment calibration, until white brightness, the colorimetric parameter step consistent with parameter reference data value corresponding to LED ray machine display effect comprises:

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, monochromatic colorimetric parameter to LED ray machine carries out color adjustment calibration, until monochromatic colorimetric parameter corresponding to LED ray machine display effect is consistent with parameter reference data value.

Step S5, according to brightness, the colorimetric parameter of the monochromatic brightness, colorimetric parameter of the LED ray machine after calibration and white, maintain the white displays effect of LED ray machine.

Before step S4, also comprise:

Step S4-1, judge that whether colour cast surpasses default colour cast threshold values, if, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range; If not, proceed to step S4.

First, LED ray machine is carried out to installation calibrating, after LED ray machine installation calibrating completes and passes through to check and accept, obtain the brightness, colorimetric parameter of initial monochrome corresponding to LED ray machine display effect and brightness, the colorimetric parameter of white, and it is made as respectively to monochromatic and white parameter reference data value preserves; Wherein, monochrome is that redness, green, blueness or monochrome are redness, green, blueness, yellow, cyan.

For more clear technical scheme of the present invention, set forth again some preferred embodiments below.

Embodiment mono-

LED ray machine operates in monochromatic in red, green, blue situation, and LED ray machine light source comprises that by R-LED(be red LED lamp) red light source that sends, by G-LED(, be green LED lamp) green light source that sends and by B-LED(, be blue led lamp) blue-light source that sends; The electric current of R-LED, G-LED, B-LED of flowing through respectively in LED ray machine circuit is respectively R-principal current, G-principal current, B-principal current.

Step S101, obtain brightness, the colorimetric parameter of initial redness corresponding to LED ray machine display effect, green, blue brightness, colorimetric parameter and white, and it is made as respectively to redness, green, blueness and white parameter reference data value preserves;

Step S102, LED ray machine is enabled to color white balance calibration operation, according to presetting the time interval, detect corresponding redness, green, blueness and white real-time luminosity, the colorimetric parameter of LED ray machine display effect;

Step S103, according to the parameter reference data value of described redness, green, blueness, the white redness corresponding with LED ray machine display effect, green, blueness, white real-time luminosity, colorimetric parameter, determine the colour cast state of LED ray machine display effect;

Step S104-1, judge that whether colour cast surpasses default colour cast threshold values, if, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range; If not, proceed to step S104;

Wherein, judge whether colour cast surpasses default colour cast threshold values, if so, the color white of LED ray machine is regulated, until the step of the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value in setting range comprises:

Independent of R-principal current, G-principal current, B-principal current is adjusted, by the R-principal current after adjusting, G-principal current, B-principal current arranges together and enters LED ray machine circuit, can be fast by white brightness corresponding to LED ray machine display effect under colour cast state, colorimetric parameter is adjusted in setting range, relatively white brightness corresponding to LED ray machine display effect, colorimetric parameter and parameter reference data value, until white brightness corresponding to LED ray machine display effect, the difference of colorimetric parameter and white parameter reference data value stops adjusting in setting range.

Step S104, under colour cast state, redness to LED ray machine, green, blue brightness, colorimetric parameter and white brightness, colorimetric parameter carries out color adjustment calibration, due in carrying out color adjustment calibration, to redness, green, blue brightness, the adjusting of colorimetric parameter and to white brightness, the adjusting of colorimetric parameter can exist and influence each other, in carrying out color adjustment calibration with white brightness, colorimetric parameter be adjusted to master, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, prevent the R-LED that flows through in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation.

Wherein, under colour cast state, the redness of LED ray machine, green, blue brightness, colorimetric parameter and white brightness, colorimetric parameter are carried out to color adjustment calibration and comprise:

The redness of LED ray machine, green, blue brightness, colorimetric parameter are carried out to color adjustment calibration, until redness corresponding to LED ray machine display effect, green, blue brightness, colorimetric parameter are consistent with parameter reference data value;

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, the redness of LED ray machine, green, blue colorimetric parameter are carried out to color adjustment calibration, until redness corresponding to LED ray machine display effect, green, blue colorimetric parameter are consistent with parameter reference data value.

Step S105, according to the redness, green of the LED ray machine after calibration, blue brightness, colorimetric parameter and the brightness of white, the white displays effect that colorimetric parameter maintains LED ray machine more accurately, LED ray machine exits color white balance calibration operation.

Embodiment bis-

The difference of itself and embodiment mono-is: LED ray machine operates in monochromatic in red, green, blue situation, LED ray machine light source comprises the red light source being sent by R-LED, G-LED, B-LED mixing, and the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is R-principal current, the little electric current of G-, the little electric current of B-; By R-LED, G-LED, B-LED, mix the green light source sending, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is the little electric current of R-, G-principal current, the little electric current of B-; And mixing by R-LED, G-LED, B-LED the blue-light source sending, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is the little electric current of R-, the little electric current of G-, B-principal current.

Wherein, judge whether colour cast surpasses default colour cast threshold values, if so, the color white of LED ray machine is regulated, until the step of the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value in setting range comprises:

Independently R-principal current, G-principal current, B-principal current are adjusted, R-principal current, G-principal current, B-principal current after adjusting are arranged together and enter LED ray machine circuit; R-principal current, G-principal current, B-principal current are regulated according to certain binding relationship with corresponding little electric current simultaneously, to guarantee that redness, green, blue brightness, the adjusting of colourity can not produce too great deviations in carrying out the process of white brightness, colorimetric parameter adjusting; Corresponding white brightness, colorimetric parameter and the parameter reference data value of LED ray machine display effect relatively, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value stops adjustment in setting range.

By following formula, principal current is bound with corresponding little electric current:

${\mathrm{\Δi}}_b=\frac{{{\mathrm{\ΔI}}_b}^{*}(i_b-i_o)}{I_b-I_o};$

Wherein, I _bfor benchmark principal current corresponding to parameter reference data value, i _bfor the little electric current of benchmark corresponding to parameter reference data value; I _ofor R-principal current, G-principal current, B-principal current in LED ray machine are adjusted corresponding starting current; i _ofor the little electric current of R-, the little electric current of G-, the little electric current of B-in LED ray machine are adjusted corresponding starting current; Δ I _bfor R-principal current, G-principal current, B-principal current in LED ray machine are adjusted the difference of the benchmark principal current that corresponding current electric current is corresponding with parameter reference data value; Δ i _bfor the little electric current of R-, the little electric current of G-, the little electric current of B-in LED ray machine are adjusted the difference of the little electric current of benchmark that corresponding current electric current is corresponding with parameter reference data value; Described starting current is the starting current at zero point of LED, and described current electric current is the electric current of LED of flowing through in LED ray machine circuit in adjustment process.

Embodiment tri-

LED ray machine operates in the monochromatic situation for red, green, blue, yellow, cyan, and LED ray machine light source comprises the red light source mainly being sent by R-LED, the green light source mainly being sent by G-LED, the blue-light source mainly being sent by B-LED, mainly by R-LED and the overlapping yellow light sources of sending of G-LED, main by G-LED and the overlapping cyan light source sending of B--LED.

When LED ray machine sends red light source, the electric current of the R-LED that flows through in LED ray machine circuit is R-principal current; When LED ray machine sends green light source, the electric current of the G-LED that flows through in LED ray machine circuit is G-principal current; When LED ray machine sends blue-light source, the electric current of the B-LED that flows through in LED ray machine circuit is B-principal current; At red light source, green light source is overlapping while being yellow light sources, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED is Y-R Neutral colour electric current, Y-G Neutral colour electric current; At green light source, blue-light source is overlapping while being cyan light source, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED is C-G Neutral colour electric current, C-B Neutral colour electric current.

Brightness, the colorimetric parameter of step S201, the brightness of obtaining initial redness corresponding to LED ray machine display effect, green, blueness, yellow, cyan, colorimetric parameter and white, and the parameter reference data value that it is made as respectively to redness, green, blueness, yellow, cyan and white is preserved;

Step S202, LED ray machine is enabled to color white balance calibration operation, according to the real-time luminosity, the colorimetric parameter that preset the time interval and detect redness corresponding to LED ray machine display effect, green, blueness, yellow, cyan and white;

Step S203, according to the parameter reference data value of described redness, green, blueness, yellow, cyan, the white redness corresponding with LED ray machine display effect, green, blueness, yellow, cyan, white real-time luminosity, colorimetric parameter, determine the colour cast state of LED ray machine display effect;

Step S204-1, judge that whether colour cast surpasses default colour cast threshold values, if, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range; If not, proceed to step S204;

Wherein, judge whether colour cast surpasses default colour cast threshold values, if so, the color white of LED ray machine is regulated, until the step of the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value in setting range comprises:

Independently R-principal current, G-principal current, B-principal current are adjusted, R-principal current, G-principal current, B-principal current after adjusting are arranged together and enter LED ray machine circuit, can fast corresponding white brightness, the colorimetric parameter of LED ray machine display effect under colour cast state be adjusted in setting range; R-principal current, G-principal current, B-principal current are regulated according to certain binding relationship with corresponding Neutral colour electric current simultaneously, to guarantee that yellow, the brightness of cyan is not, the adjusting of colourity can produce too great deviations in carrying out the process of white brightness, colorimetric parameter adjusting; Corresponding white brightness, colorimetric parameter and the parameter reference data value of LED ray machine display effect relatively, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value stops adjustment in setting range.

By following formula, principal current and Neutral colour electric current are bound:

${\mathrm{\ΔI}}_{Y-R-b}={\mathrm{\ΔI}}_{R-b}\×\frac{I_{Y-R-b}}{I_{R-b}},{\mathrm{\ΔI}}_{Y-G-b}={\mathrm{\ΔI}}_{G-b}\×\frac{I_{Y-G-b}}{I_{G-b}},$

${\mathrm{\ΔI}}_{C-G-b}={\mathrm{\ΔI}}_{G-b}\×\frac{I_{C-G-b}}{I_{G-b}},{\mathrm{\ΔI}}_{C-B-b}={\mathrm{\ΔI}}_{B-b}\×\frac{I_{C-B-b}}{I_{B-b}},$

Wherein, Δ I _y-R-bfor when red light source, green light source is overlapping while being yellow light sources, in LED ray machine circuit through the current electric current I of R-LED _y-R-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _y-G-bfor when red light source, green light source is overlapping while being yellow light sources, in LED ray machine circuit through the current electric current I of G-LED _y-G-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _c-G-bfor when green light source, blue-light source is overlapping while being cyan light source, in LED ray machine circuit through the current electric current I of G-LED _c-G-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _c-B-bfor when green light source, blue-light source is overlapping while being cyan light source, in LED ray machine circuit through the current electric current I of B-LED _c-B-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _r-bfor carrying out color white, regulate rear current electric current I corresponding to R-principal current _r-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _g-b, for carry out color white regulate after current electric current I corresponding to G-principal current _g-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _b-bfor carrying out color white, regulate rear current electric current I corresponding to B-principal current _b-bthe difference of the benchmark principal current corresponding with parameter reference data value; Described current electric current is carry out flowing through in LED ray machine circuit in the color white adjustment process electric current of LED; Described benchmark principal current is the electric current of R-LED, G-LED, B-LED in the LED ray machine circuit of flowing through corresponding to initial color parameter reference data value.

Step S204, under colour cast state, brightness, colorimetric parameter to the brightness of the redness of LED ray machine, green, blueness, yellow, cyan, colorimetric parameter and white carry out color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Wherein, under colour cast state, brightness, the colorimetric parameter of the brightness of the redness of LED ray machine, green, blueness, yellow, cyan, colorimetric parameter and white are carried out to color adjustment calibration and comprise:

The brightness of the redness of LED ray machine, green, blueness, yellow, cyan, colorimetric parameter are carried out to color adjustment calibration, until corresponding redness, green, blueness, yellow, the brightness of cyan, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, redness to LED ray machine, green, blue, yellow, the colorimetric parameter of cyan carries out color adjustment calibration, due in carrying out color adjustment calibration, to redness, green, blue, yellow, the brightness of cyan, the adjusting of colorimetric parameter and to white brightness, the adjusting of colorimetric parameter can exist and influence each other, in carrying out color adjustment calibration with white brightness, colorimetric parameter be adjusted to master, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, prevent the R-LED that flows through in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation,

Step S205, according to the brightness of redness, the green of the LED ray machine after calibration, blueness, yellow, cyan, colorimetric parameter and the brightness of white, the white displays effect that colorimetric parameter maintains LED ray machine more accurately, LED ray machine exits color white balance calibration operation.

As shown in Figure 2, according to the invention described above color white balance calibration method, the invention provides a kind of color white balance calibration system, by application color white balance calibration system of the present invention, color comparison module judges LED ray machine display effect according to parameter reference data value and real-time luminosity, colorimetric parameter; Colorific adjustment module is carried out color adjustment calibration to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine under colour cast state, colorimetric parameter and white, take guarantee LED ray machine display effect corresponding white brightness, colorimetric parameter consistent with parameter reference data value be basic, make monochromatic brightness, colorimetric parameter and the parameter reference data value of LED ray machine be consistent, color maintains module and realizes more accurately the white displays effect of LED ray machine is maintained according to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white as far as possible.

Color white balance calibration system of the present invention, comprising:

Color memory module, for obtaining brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and is made as respectively monochromatic and white parameter reference data value by it;

Color detection module, for detection of detecting monochrome corresponding to LED ray machine display effect and white real-time luminosity, colorimetric parameter;

Color comparison module, for determining the colour cast state of LED ray machine display effect according to parameter reference data value and real-time luminosity, colorimetric parameter;

Colorific adjustment module, for brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are carried out to color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Color maintains module, for maintain the white displays effect of LED ray machine according to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white.

Color comparison module of the present invention for real-time luminosity, colorimetric parameter be monochromatic brightness, colorimetric parameter and white brightness, colorimetric parameter; Wherein, monochrome is that redness, green, blueness or monochrome are redness, green, blueness, yellow, cyan.

First, the installation calibrating of take completes and according to demand parameter reference data value is preserved as parameter reference data value, color memory module by the LED ray machine display effect after checking and accepting corresponding monochromatic brightness, colorimetric parameter and white brightness, colorimetric parameter;

Color detection module basis presets monochrome corresponding to time interval detection LED ray machine display effect and white real-time luminosity, colorimetric parameter, and monochromatic and white real-time luminosity, colorimetric parameter signal are sent to color comparison module;

Color comparison module is determined the colour cast state of LED ray machine display effect according to described parameter reference data value and real-time luminosity, colorimetric parameter; If so, send a signal to colorific adjustment module;

Colorific adjustment module judges that whether colour cast surpasses default colour cast threshold values, and the LED ray machine display effect in colour cast state is regulated;

Color maintains module according to the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and the brightness of white, the white displays effect that colorimetric parameter maintains LED ray machine more accurately.

As shown in Figure 3, color white balance calibration system also comprises color adjustment module, color adjustment module is for judging whether colour cast surpasses default colour cast threshold values, if, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range.

If the colour cast of LED ray machine display effect surpasses default colour cast threshold values, color adjustment module regulates the color white of LED ray machine, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range, the monochromatic brightness of colorific adjustment module to LED ray machine, colorimetric parameter and white brightness, colorimetric parameter carries out color adjustment calibration, due in carrying out color adjustment calibration, to monochromatic brightness, the adjusting of colorimetric parameter and to white brightness, the adjusting of colorimetric parameter can exist and influence each other, in carrying out color adjustment calibration with white brightness, colorimetric parameter be adjusted to master, until white brightness corresponding to LED ray machine display effect, colorimetric parameter is consistent with parameter reference data value, prevent the R-LED that flows through in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce the adjustment time, guarantee the stability of color white balance calibration operation,

Wherein, colorific adjustment module is carried out color adjustment calibration to brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white, until white brightness, the colorimetric parameter step consistent with parameter reference data value corresponding to LED ray machine display effect comprises:

The monochromatic brightness of LED ray machine, colorimetric parameter are carried out to color adjustment calibration, until corresponding monochromatic brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, monochromatic colorimetric parameter to LED ray machine carries out color adjustment calibration, until monochromatic colorimetric parameter corresponding to LED ray machine display effect is consistent with parameter reference data value.

If the colour cast of LED ray machine display effect does not surpass default colour cast threshold values, colorific adjustment module is directly carried out color adjustment calibration to brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value.

The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as limitation of the scope of the 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, protection scope of the present invention should be as the criterion with claims.

Claims (10)

1. a color white balance calibration method, is characterized in that, comprises the steps:

Obtain brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and it is made as respectively to monochromatic and white parameter reference data value;

Detect monochrome corresponding to LED ray machine display effect and white real-time luminosity, colorimetric parameter;

According to described parameter reference data value and real-time luminosity, colorimetric parameter, determine the colour cast state of LED ray machine display effect;

Under colour cast state, brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are carried out to color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

According to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white, maintain the white displays effect of LED ray machine.

2. color white balance calibration method according to claim 1, it is characterized in that, brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are being carried out to color adjustment calibration, until also comprise before corresponding white brightness, the colorimetric parameter of the LED ray machine display effect step consistent with parameter reference data value:

Judge that whether colour cast surpasses default colour cast threshold values, if so, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range.

3. color white balance calibration method according to claim 2, it is characterized in that, judge whether colour cast surpasses default colour cast threshold values, if, the color white of LED ray machine is regulated, until the step of the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value in setting range comprises:

Independently R-principal current, G-principal current, B-principal current are adjusted, R-principal current, G-principal current, B-principal current after adjusting are arranged together and enter LED ray machine circuit;

Corresponding white brightness, colorimetric parameter and the parameter reference data value of LED ray machine display effect relatively, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value stops adjustment in setting range;

Wherein, LED ray machine light source comprises the red light source being sent by R-LED, the green light source being sent by G-LED and the blue-light source being sent by B-LED, and R-principal current, G-principal current, B-principal current are respectively the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED.

4. color white balance calibration method according to claim 3, is characterized in that, the step that R-principal current, G-principal current, B-principal current are adjusted comprises:

To with R-principal current, G-principal current, B-principal current respectively corresponding little electric current bind adjustment, wherein, red light source is mixed and is sent by R-LED, G-LED, B-LED, and the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is R-principal current, the little electric current of G-, the little electric current of B-; Green light source is mixed and is sent by R-LED, G-LED, B-LED, and the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is the little electric current of R-, G-principal current, the little electric current of B-; Blue-light source is mixed and is sent by R-LED, G-LED, B-LED, and the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED, B-LED is the little electric current of R-, the little electric current of G-, B-principal current.

5. color white balance calibration method according to claim 3, is characterized in that, the step that R-principal current, G-principal current, B-principal current are adjusted comprises:

To with R-principal current, G-principal current, B-principal current respectively corresponding Neutral colour electric current bind adjustment, wherein, when green light source, blue-light source is overlapping while being cyan light source, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED is C-G Neutral colour electric current, C-B Neutral colour electric current; When red light source, green light source is overlapping while being yellow light sources, the electric current of flow through respectively in LED ray machine circuit R-LED, G-LED is Y-R Neutral colour electric current, Y-G Neutral colour electric current.

6. color white balance calibration method according to claim 5, is characterized in that, to R-principal current, G-principal current, B-principal current respectively corresponding Neutral colour electric current bind the step of adjusting and comprise,

By following formula, principal current and Neutral colour electric current are bound:

${\mathrm{\ΔI}}_{Y-R-b}={\mathrm{\ΔI}}_{R-b}\×\frac{I_{Y-R-b}}{I_{R-b}},{\mathrm{\ΔI}}_{Y-G-b}={\mathrm{\ΔI}}_{G-b}\×\frac{I_{Y-G-b}}{I_{G-b}},$

${\mathrm{\ΔI}}_{C-G-b}={\mathrm{\ΔI}}_{G-b}\×\frac{I_{C-G-b}}{I_{G-b}},{\mathrm{\ΔI}}_{C-B-b}={\mathrm{\ΔI}}_{B-b}\×\frac{I_{C-B-b}}{I_{B-b}},$

Wherein, Δ I _y-R-bfor when red light source, green light source is overlapping while being yellow light sources, in LED ray machine circuit through the current electric current I of R-LED _y-R-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _y-G-bfor when red light source, green light source is overlapping while being yellow light sources, in LED ray machine circuit through the current electric current I of G-LED _y-G-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _c-G-bfor when green light source, blue-light source is overlapping while being cyan light source, in LED ray machine circuit through the current electric current I of G-LED _c-G-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _c-B-bfor when green light source, blue-light source is overlapping while being cyan light source, in LED ray machine circuit through the current electric current I of B-LED _c-B-bthe difference of the benchmark principal current corresponding with parameter reference data value; Δ I _r-b, Δ I _g-b, Δ I _b-bbe respectively R-principal current, G-principal current, current electric current I corresponding to B-principal current _r-b, I _g-b, I _b-bthe difference of the benchmark principal current corresponding with parameter reference data value; Described current electric current is the electric current of LED of flowing through in LED ray machine circuit in adjustment process.

7. color white balance calibration method according to claim 1, it is characterized in that, under colour cast state, brightness, colorimetric parameter to the monochromatic brightness of LED ray machine, colorimetric parameter and white carry out color adjustment calibration, until white brightness, the colorimetric parameter step consistent with parameter reference data value corresponding to LED ray machine display effect comprises:

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, monochromatic colorimetric parameter to LED ray machine carries out color adjustment calibration, until monochromatic colorimetric parameter corresponding to LED ray machine display effect is consistent with parameter reference data value.

8. a color white balance calibration system, is characterized in that, comprising:

Color memory module, for obtaining brightness, the colorimetric parameter of the initial monochromatic brightness of LED ray machine display effect, colorimetric parameter and white, and is made as respectively monochromatic and white parameter reference data value by it;

Color detection module, for detection of detecting monochrome corresponding to LED ray machine display effect and white real-time luminosity, colorimetric parameter;

Color comparison module, for determining the colour cast state of LED ray machine display effect according to parameter reference data value and real-time luminosity, colorimetric parameter;

Colorific adjustment module, for brightness, the colorimetric parameter of the monochromatic brightness of LED ray machine, colorimetric parameter and white are carried out to color adjustment calibration, until corresponding white brightness, the colorimetric parameter of LED ray machine display effect is consistent with parameter reference data value;

Color maintains module, for maintain the white displays effect of LED ray machine according to brightness, the colorimetric parameter of the monochromatic brightness of the LED ray machine after calibration, colorimetric parameter and white.

9. color white balance calibration system according to claim 8, is characterized in that: also comprise color adjustment module,

For judging that whether colour cast surpasses default colour cast threshold values, if so, the color white of LED ray machine is regulated, until the difference of white brightness corresponding to LED ray machine display effect, colorimetric parameter and white parameter reference data value is in setting range.

10. color white balance calibration system according to claim 8, is characterized in that: described colorific adjustment module also for

Judge whether the number of times of in LED ray machine, the electric current of the LED that flows through being adjusted exceeds preset range, if, monochromatic colorimetric parameter to LED ray machine carries out color adjustment calibration, until monochromatic colorimetric parameter corresponding to LED ray machine display effect is consistent with parameter reference data value.

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