CN103617779B - Color white balance calibration method and system - Google Patents
Color white balance calibration method and system Download PDFInfo
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Abstract
The invention discloses a kind of color white balance calibration method and system, its method comprises: the reference data that gets parms value and real-time luminosity, colorimetric parameter, according to described parameter reference reference value and real-time luminosity, colorimetric parameter determination colour cast state; Color adjustment calibration is carried out to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value; The white displays effect of LED light machine is maintained according to the brightness of the monochromatic brightness of LED light machine after calibration, colorimetric parameter and white, colorimetric parameter.The present invention is adjusted to master with the color white of LED light machine display effect, auxiliary with being adjusted to of monochromatic color, make LED light machine in operational process, realize the automatic maintenance of white displays effect more accurately, prevent the current value flowing through LED in color adjustment calibration process from shaking up and down, reduce regulation time, ensure the stability of color white balance calibration operation.
Description
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
At present in Information Visualization Technology, the application of giant-screen digital jointing display product is more and more extensive, and LED light machine occupies the leading position of giant-screen digital jointing display product.Giant-screen digital jointing display 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 display, and in normal use procedure, the more important thing is the maintenance of the white picture display effect to LED rear-projection ray machine.
In actual applications, color white is formed after red (R), green (G), blue (B) or red (R), green (G), blue (B), yellow (Y), blue or green (C) monochrome mixing superposition, white picture display effect is ensured by maintaining monochromatic color, due to red, green, blue, Huang, blue or green monochromatic brightness, colorimetric parameter collection value instability that Real-time Obtaining arrives, 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 display, white picture display effect is most important, maintain indirectly to realize color white by maintaining monochromatic color, in the case, when the deviation of each monochrome being jointly added to again in the deviation of white, the maintenance less stable of white picture display effect can be caused.
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, master is adjusted to the color white of LED light machine display effect, with red, green, blue or red, green, blue, Huang, blue or green monochromatic color be adjusted to auxiliary, make LED light machine in operational process, realize the automatic maintenance of white displays effect more accurately.
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 the brightness of LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, colorimetric parameter, and it is set to respectively parameter reference reference value that is monochromatic and white;
Detect real-time luminosity, the colorimetric parameter of monochrome corresponding to LED light machine display effect and white;
According to the colour cast state of described parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Under colour cast state, color adjustment calibration is carried out to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
The white displays effect of LED light machine is maintained according to the brightness of the monochromatic brightness of LED light machine after calibration, colorimetric parameter and white, colorimetric parameter.
Above-mentioned color white balance calibration method, carrying out in color adjustment calibration, to the brightness of monochrome, the adjustment of colorimetric parameter and the brightness to white, the adjustment of colorimetric parameter can exist and influences each other, carrying out in color adjustment calibration with the brightness of white, colorimetric parameter be adjusted to master, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, according to the monochromatic brightness of the LED light machine after calibration, the brightness of colorimetric parameter and white, colorimetric parameter realizes maintaining the white displays effect of LED light machine more accurately, prevent the current value flowing through LED in color adjustment calibration process from shaking up and down, reduce regulation time, ensure the stability of color white balance calibration operation.
A kind of color white balance calibration system, it comprises:
Color memory module, for obtaining brightness, the colorimetric parameter of LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, and is set to parameter reference reference value that is monochromatic and white respectively by it;
Color detection module, for detecting real-time luminosity, the colorimetric parameter of monochrome corresponding to LED light machine display effect and white;
Color comparison module, for the colour cast state according to parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Colorific adjustment module, carries out color adjustment calibration for the brightness of the monochromatic brightness to LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
Color maintains module, for the brightness of the monochromatic brightness according to the LED light machine after calibration, colorimetric parameter and white, the white displays effect of colorimetric parameter maintenance LED light machine.
Above-mentioned color white balance calibration system, color comparison module judges LED light machine display effect according to parameter reference reference value and real-time luminosity, colorimetric parameter, colorific adjustment module is to the monochromatic brightness of the LED light machine be under colour cast state, the brightness of colorimetric parameter and white, colorimetric parameter carries out color adjustment calibration, carrying out in color adjustment calibration with the brightness of white, colorimetric parameter be adjusted to master, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, color maintains the monochromatic brightness of module according to the LED light machine after calibration, the brightness of colorimetric parameter and white, colorimetric parameter realizes maintaining the white displays effect of LED light machine more accurately, prevent the current value flowing through LED in color adjustment calibration process from shaking up and down, reduce regulation time, ensure 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 feature of the present invention, technological means and the specific purposes reached, function can be understood further, 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, the brightness obtaining LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, colorimetric parameter, and it is set to respectively parameter reference reference value that is monochromatic and white;
Real-time luminosity, the colorimetric parameter of the monochrome that step S2, detection LED light machine display effect are corresponding and white;
Step S3, colour cast state according to described parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Step S4, under colour cast state, to the monochromatic brightness of LED light machine, the brightness of colorimetric parameter and white, colorimetric parameter carries out color adjustment calibration, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, according to the monochromatic brightness of the LED light machine after calibration, the brightness of colorimetric parameter and white, colorimetric parameter realizes maintaining the white displays effect of LED light machine more accurately, prevent the current value flowing through LED in color adjustment calibration process from shaking up and down, reduce regulation time, ensure the stability of color white balance calibration operation,
Wherein, under colour cast state, color adjustment calibration is carried out to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, the colorimetric parameter step consistent with parameter reference reference value comprises:
Judge, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, color adjustment calibration is carried out to the colorimetric parameter of the monochrome of LED light machine, until the colorimetric parameter of monochrome corresponding to LED light machine display effect is consistent with parameter reference reference value.
Step S5, the brightness of monochromatic brightness, colorimetric parameter and white according to the LED light machine after calibration, the white displays effect of colorimetric parameter maintenance LED light machine.
Also comprise before step S4:
Step S4-1, judge whether colour cast exceedes default colour cast threshold values, if, then the color white of LED light machine is regulated, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range; If not, then step S4 is proceeded to.
First, installation calibrating is carried out to LED light machine, after LED light machine installation calibrating completes and passes through examination, obtain the brightness of initial monochrome corresponding to LED light machine display effect, the brightness of colorimetric parameter and white, colorimetric parameter, and it is set to respectively parameter reference reference value that is monochromatic and white and preserves; Wherein, monochrome is red, green, blue or monochromatic is red, green, blue, yellow, cyan.
In order to more clear technical scheme of the present invention, set forth some preferred embodiments more below.
Embodiment one
LED light machine operates in monochromatic for when red, green, blue, and LED light machine light source comprises by R-LED(and red LED lamp) red light source that sends, by G-LED(and green LED lamp) green light source that sends and by B-LED(and blue led lamp) blue-light source that sends; The electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively respectively R-principal current, G-principal current, B-principal current.
Step S101, obtain initial redness corresponding to LED light machine display effect, green, blue brightness, the brightness of colorimetric parameter and white, colorimetric parameter, and it is set to respectively redness, green, blueness and white parameter reference reference value and preserves;
Step S102, LED light machine being enabled to the operation of color white balance calibration, detecting redness corresponding to LED light machine display effect, green, blueness and white real-time luminosity, colorimetric parameter according to presetting the time interval;
Step S103, redness, green, blueness, the real-time luminosity of white, the colour cast state of colorimetric parameter determination LED light machine display effect corresponding with LED light machine display effect according to the parameter reference reference value of described redness, green, blueness, white;
Step S104-1, judge whether colour cast exceedes default colour cast threshold values, if, then the color white of LED light machine is regulated, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range; If not, then step S104 is proceeded to;
Wherein, judge whether colour cast exceedes default colour cast threshold values, if so, then the color white of LED light machine is regulated, until the step of difference in setting range of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white comprises:
Independent of R-principal current, G-principal current, B-principal current adjusts, by the R-principal current after adjustment, G-principal current, B-principal current arranges together and enters the dynamo-electric road of LED light, can fast by the brightness of white corresponding for the LED light machine display effect be under colour cast state, colorimetric parameter is adjusted in setting range, the relatively brightness of the white that LED light machine display effect is corresponding, colorimetric parameter and parameter reference reference value, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter stops adjusting with the difference of the parameter reference reference value of white in setting range.
Step S104, under colour cast state, to the redness of LED light machine, green, blue brightness, the brightness of colorimetric parameter and white, colorimetric parameter carries out color adjustment calibration, owing to carrying out in color adjustment calibration, to redness, green, blue brightness, the adjustment of colorimetric parameter and the brightness to white, the adjustment of colorimetric parameter can exist and influences each other, carrying out in color adjustment calibration with the brightness of white, colorimetric parameter be adjusted to master, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, prevent from flowing through R-LED in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce regulation time, ensure the stability of color white balance calibration operation.
Wherein, under colour cast state, the brightness of the redness of LED light machine, green, blue brightness, colorimetric parameter and white, colorimetric parameter are carried out color adjustment calibration and are comprised:
Color adjustment calibration is carried out to the redness of LED light machine, green, blue brightness, colorimetric parameter, until redness corresponding to LED light machine display effect, green, blue brightness, colorimetric parameter are consistent with parameter reference reference value;
Judge, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, color adjustment calibration is carried out to the redness of LED light machine, green, blue colorimetric parameter, until redness corresponding to LED light machine display effect, green, blue colorimetric parameter are consistent with parameter reference reference value.
The brightness of step S105, the redness of LED light machine according to after calibration, green, blue brightness, colorimetric parameter and white, colorimetric parameter maintain the white displays effect of LED light machine more accurately, and LED light machine exits color white balance calibration and operates.
Embodiment two
The difference of itself and embodiment one is: LED light machine operates in monochromatic for when red, green, blue, LED light machine light source comprises and mixes by R-LED, G-LED, B-LED the red light source sent, and the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-principal current, G-small area analysis, B-small area analysis; Mixed the green light source sent by R-LED, G-LED, B-LED, the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-small area analysis, G-principal current, B-small area analysis; And the blue-light source sent is mixed by R-LED, G-LED, B-LED, the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-small area analysis, G-small area analysis, B-principal current.
Wherein, judge whether colour cast exceedes default colour cast threshold values, if so, then the color white of LED light machine is regulated, until the step of difference in setting range of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white comprises:
Independently R-principal current, G-principal current, B-principal current are adjusted, the R-principal current after adjustment, G-principal current, B-principal current are arranged together and enter the dynamo-electric road of LED light; R-principal current, G-principal current, B-principal current are regulated according to certain binding relationship with corresponding small area analysis simultaneously, to ensure that red, green, blue brightness, the adjustment of colourity can not produce too great deviations in the process of carrying out white brightness, colorimetric parameter adjustment; The relatively brightness of the white that LED light machine display effect is corresponding, colorimetric parameter and parameter reference reference value, until the difference of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white parameter reference reference value stops adjusting in setting range.
By following formula, principal current is bound with corresponding small area analysis:
Wherein, I
bfor the benchmark principal current that parameter reference reference value is corresponding, i
bfor the benchmark small area analysis that parameter reference reference value is corresponding; I
ofor in LED light machine, R-principal current, G-principal current, B-principal current carry out adjusting corresponding starting current; i
ofor in LED light machine, R-small area analysis, G-small area analysis, B-small area analysis carry out adjusting corresponding starting current; Δ I
bfor in LED light machine, R-principal current, G-principal current, B-principal current carry out the difference adjusting the corresponding current flow benchmark principal current corresponding with parameter reference reference value; Δ i
bfor in LED light machine, R-small area analysis, G-small area analysis, B-small area analysis carry out the difference adjusting the corresponding current flow benchmark small area analysis corresponding with parameter reference reference value; Described starting current is the starting current at zero point of LED, and described current flow is the electric current flowing through LED in adjustment process in the dynamo-electric road of LED light.
Embodiment three
LED light machine operate in monochromatic for red, green, blue, yellow, cyan when, LED light machine light source comprises the red light source sent primarily of R-LED, the green light source sent primarily of G-LED, the blue-light source sent primarily of B-LED, the yellow light sources sent primarily of R-LED and G-LED overlap, the cyan light source that sends primarily of G-LED and B--LED overlap.
When LED light machine sends red light source, the electric current flowing through R-LED in the dynamo-electric road of LED light is R-principal current; When LED light machine sends green light source, the electric current flowing through G-LED in the dynamo-electric road of LED light is G-principal current; When LED light machine sends blue-light source, the electric current flowing through B-LED in the dynamo-electric road of LED light is B-principal current; When red light source, green light source overlap are yellow light sources, the electric current flowing through R-LED, G-LED in the dynamo-electric road of LED light is respectively Y-R Neutral colour electric current, Y-G Neutral colour electric current; When green light source, blue-light source overlap are cyan light source, the electric current flowing through R-LED, G-LED in the dynamo-electric road of LED light is respectively C-G Neutral colour electric current, C-B Neutral colour electric current.
Step S201, obtain initial redness corresponding to LED light machine display effect, green, blueness, yellow, the brightness of cyan, the brightness of colorimetric parameter and white, colorimetric parameter, and the parameter reference reference value it being set to respectively redness, green, blueness, yellow, cyan and white is preserved;
Step S202, LED light machine enabled to the operation of color white balance calibration, according to the real-time luminosity, the colorimetric parameter that preset the time interval and detect LED light machine display effect corresponding redness, green, blueness, yellow, cyan and white;
Step S203, redness, green, blueness, yellow, cyan, the real-time luminosity of white, the colour cast state of colorimetric parameter determination LED light machine display effect corresponding with LED light machine display effect according to the parameter reference reference value of described redness, green, blueness, yellow, cyan, white;
Step S204-1, judge whether colour cast exceedes default colour cast threshold values, if, then the color white of LED light machine is regulated, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range; If not, then step S204 is proceeded to;
Wherein, judge whether colour cast exceedes default colour cast threshold values, if so, then the color white of LED light machine is regulated, until the step of difference in setting range of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white comprises:
Independently R-principal current, G-principal current, B-principal current are adjusted, R-principal current after adjustment, G-principal current, B-principal current are arranged together and enter the dynamo-electric road of LED light, can fast the brightness of white corresponding for the LED light machine display effect be under colour cast state, colorimetric parameter are 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 ensure that yellow, the brightness of cyan, the adjustment of colourity can not produce too great deviations in the process of carrying out white brightness, colorimetric parameter adjustment; The relatively brightness of the white that LED light machine display effect is corresponding, colorimetric parameter and parameter reference reference value, until the difference of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white parameter reference reference value stops adjusting in setting range.
By following formula, principal current and Neutral colour electric current are bound:
Wherein, Δ I
y-R-bfor when red light source, green light source overlap are yellow light sources, through the current flow I of R-LED in the dynamo-electric road of LED light
y-R-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
y-G-bfor when red light source, green light source overlap are yellow light sources, through the current flow I of G-LED in the dynamo-electric road of LED light
y-G-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
c-G-bfor when green light source, blue-light source overlap are cyan light source, through the current flow I of G-LED in the dynamo-electric road of LED light
c-G-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
c-B-bfor when green light source, blue-light source overlap are cyan light source, through the current flow I of B-LED in the dynamo-electric road of LED light
c-B-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
r-bfor carrying out the current flow I that color white regulates rear R-principal current corresponding
r-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
g-b, for carry out color white regulate after current flow I corresponding to G-principal current
g-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
b-bfor carrying out the current flow I that color white regulates rear B-principal current corresponding
b-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Described current flow is the electric current carrying out flowing through in the dynamo-electric road of LED light in color white adjustment process LED; Described benchmark principal current is the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light corresponding to initial color parameter reference reference value.
Step S204, under colour cast state, color adjustment calibration is carried out to the brightness of the brightness of the redness of LED light machine, green, blueness, yellow, cyan, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
Wherein, under colour cast state, the brightness of the brightness of the redness of LED light machine, green, blueness, yellow, cyan, colorimetric parameter and white, colorimetric parameter are carried out color adjustment calibration and are comprised:
Color adjustment calibration is carried out to the redness of LED light machine, green, blueness, yellow, the brightness of cyan, colorimetric parameter, until redness corresponding to LED light machine display effect, green, blueness, yellow, the brightness of cyan, colorimetric parameter are consistent with parameter reference reference value;
Judge, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, to the redness of LED light machine, green, blue, yellow, the colorimetric parameter of cyan carries out color adjustment calibration, owing to carrying out in color adjustment calibration, to redness, green, blue, yellow, the brightness of cyan, the adjustment of colorimetric parameter and the brightness to white, the adjustment of colorimetric parameter can exist and influences each other, carrying out in color adjustment calibration with the brightness of white, colorimetric parameter be adjusted to master, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, prevent from flowing through R-LED in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce regulation time, ensure the stability of color white balance calibration operation,
The brightness of the brightness of step S205, the redness of LED light machine according to after calibration, green, blueness, yellow, cyan, colorimetric parameter and white, colorimetric parameter maintain the white displays effect of LED light machine more accurately, and LED light machine exits color white balance calibration and operates.
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 light machine display effect according to parameter reference reference value and real-time luminosity, colorimetric parameter; Colorific adjustment module carries out color adjustment calibration to the brightness of the monochromatic brightness of the LED light machine be under colour cast state, colorimetric parameter and white, colorimetric parameter, based on ensureing that the brightness of the white that LED light machine display effect is corresponding, colorimetric parameter are consistent with parameter reference reference value, make the monochromatic brightness of LED light machine, colorimetric parameter and parameter reference reference value be consistent, color maintains module and realizes more accurately maintaining the white displays effect of LED light machine according to the brightness of the monochromatic brightness of LED light machine after calibration, colorimetric parameter and white, colorimetric parameter as far as possible.
Color white balance calibration system of the present invention, comprising:
Color memory module, for obtaining brightness, the colorimetric parameter of LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, and is set to parameter reference reference value that is monochromatic and white respectively by it;
Color detection module, for detecting real-time luminosity, the colorimetric parameter of monochrome corresponding to LED light machine display effect and white;
Color comparison module, for the colour cast state according to parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Colorific adjustment module, carries out color adjustment calibration for the brightness of the monochromatic brightness to LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
Color maintains module, for the brightness of the monochromatic brightness according to the LED light machine after calibration, colorimetric parameter and white, the white displays effect of colorimetric parameter maintenance LED light machine.
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 red, green, blue or monochromatic is red, green, blue, yellow, cyan.
First, complete with installation calibrating and pass through corresponding monochromatic brightness, colorimetric parameter and the white brightness of LED light machine display effect after checking and accepting, colorimetric parameter and according to demand parameter reference reference value is preserved for parameter reference reference value, color memory module;
Monochromatic and white real-time luminosity, colorimetric parameter signal according to the real-time luminosity, the colorimetric parameter that preset monochrome corresponding to time interval detection LED light machine display effect and white, and are sent to color comparison module by color detection module;
Color comparison module is according to the colour cast state of described parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect; If so, colorific adjustment module is then sent a signal to;
Colorific adjustment module judges whether colour cast exceedes default colour cast threshold values, and regulates the LED light machine display effect being in colour cast state;
Color maintains module maintains LED light machine more accurately white displays effect according to the brightness of the brightness of monochrome of the LED light machine after calibration, colorimetric parameter and white, colorimetric parameter.
As shown in Figure 3, color white balance calibration system also comprises color adjustment module, color adjustment module is for judging whether colour cast exceedes default colour cast threshold values, if, then the color white of LED light machine is regulated, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range.
If the colour cast of LED light machine display effect exceedes default colour cast threshold values, then the color white of color adjustment module to LED light machine regulates, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range, colorific adjustment module is to the monochromatic brightness of LED light machine, the brightness of colorimetric parameter and white, colorimetric parameter carries out color adjustment calibration, owing to carrying out in color adjustment calibration, to the brightness of monochrome, the adjustment of colorimetric parameter and the brightness to white, the adjustment of colorimetric parameter can exist and influences each other, carrying out in color adjustment calibration with the brightness of white, colorimetric parameter be adjusted to master, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter is consistent with parameter reference reference value, prevent from flowing through R-LED in color adjustment calibration process, G-LED, the current value of B-LED shakes up and down, reduce regulation time, ensure the stability of color white balance calibration operation,
Wherein, colorific adjustment module carries out color adjustment calibration to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, the colorimetric parameter step consistent with parameter reference reference value comprises:
Color adjustment calibration is carried out to the brightness of the monochrome of LED light machine, colorimetric parameter, until the brightness of monochrome corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
Judge, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, color adjustment calibration is carried out to the colorimetric parameter of the monochrome of LED light machine, until the colorimetric parameter of monochrome corresponding to LED light machine display effect is consistent with parameter reference reference value.
If the colour cast of LED light machine display effect does not exceed default colour cast threshold values, then colorific adjustment module directly carries out color adjustment calibration to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value.
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 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 the brightness of LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, colorimetric parameter, and it is set to respectively parameter reference reference value that is monochromatic and white;
Detect real-time luminosity, the colorimetric parameter of monochrome corresponding to LED light machine display effect and white;
According to the colour cast state of described parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Under colour cast state, color adjustment calibration is carried out to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
The white displays effect of LED light machine is maintained according to the brightness of the monochromatic brightness of LED light machine after calibration, colorimetric parameter and white, colorimetric parameter.
2. color white balance calibration method according to claim 1, it is characterized in that, color adjustment calibration is carried out, until also comprise before the brightness of white corresponding to LED light machine display effect, the colorimetric parameter step consistent with parameter reference reference value at the brightness of the monochromatic brightness to LED light machine, colorimetric parameter and white, colorimetric parameter:
Judge whether colour cast exceedes default colour cast threshold values, if so, then regulates the color white of LED light machine, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white is in setting range.
3. color white balance calibration method according to claim 2, it is characterized in that, judge whether colour cast exceedes default colour cast threshold values, if, then the color white of LED light machine is regulated, until the step of difference in setting range of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white comprises:
Independently R-principal current, G-principal current, B-principal current are adjusted, the R-principal current after adjustment, G-principal current, B-principal current are arranged together and enter the dynamo-electric road of LED light;
The relatively brightness of the white that LED light machine display effect is corresponding, colorimetric parameter and parameter reference reference value, until the difference of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white parameter reference reference value stops adjusting in setting range;
Wherein, the blue-light source that LED light machine light source comprises the red light source sent by R-LED, the green light source sent by G-LED and sent by B-LED, R-principal current, G-principal current, B-principal current are respectively the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light respectively.
4. color white balance calibration method according to claim 3, is characterized in that, comprises the step that R-principal current, G-principal current, B-principal current adjust:
Binding adjustment is carried out to the small area analysis corresponding respectively with R-principal current, G-principal current, B-principal current, wherein, red light source is sent by R-LED, G-LED, B-LED mixing, and the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-principal current, G-small area analysis, B-small area analysis; Green light source is sent by R-LED, G-LED, B-LED mixing, and the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-small area analysis, G-principal current, B-small area analysis; Blue-light source is sent by R-LED, G-LED, B-LED mixing, and the electric current flowing through R-LED, G-LED, B-LED in the dynamo-electric road of LED light is respectively R-small area analysis, G-small area analysis, B-principal current.
5. color white balance calibration method according to claim 3, is characterized in that, comprises the step that R-principal current, G-principal current, B-principal current adjust:
Binding adjustment is carried out to the Neutral colour electric current corresponding respectively with R-principal current, G-principal current, B-principal current, wherein, when green light source, blue-light source overlap are cyan light source, the electric current flowing through G-LED, B-LED in the dynamo-electric road of LED light is respectively C-G Neutral colour electric current, C-B Neutral colour electric current; When red light source, green light source overlap are yellow light sources, the electric current flowing through R-LED, G-LED in the dynamo-electric road of LED light is respectively 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, carries out binding the step adjusted comprise the Neutral colour electric current corresponding respectively with R-principal current, G-principal current, B-principal current,
By following formula, principal current and Neutral colour electric current are bound:
Wherein, Δ I
y-R-bfor when red light source, green light source overlap are yellow light sources, through the current flow I of R-LED in the dynamo-electric road of LED light
y-R-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
y-G-bfor when red light source, green light source overlap are yellow light sources, through the current flow I of G-LED in the dynamo-electric road of LED light
y-G-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
c-G-bfor when green light source, blue-light source overlap are cyan light source, through the current flow I of G-LED in the dynamo-electric road of LED light
c-G-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
c-B-bfor when green light source, blue-light source overlap are cyan light source, through the current flow I of B-LED in the dynamo-electric road of LED light
c-B-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Δ I
r-b, Δ I
g-b, Δ I
b-bbe respectively the current flow I that R-principal current, G-principal current, B-principal current are corresponding
r-b, I
g-b, I
b-bthe difference of the benchmark principal current corresponding with parameter reference reference value; Described current flow is the electric current flowing through LED in adjustment process in the dynamo-electric road of LED light.
7. color white balance calibration method according to claim 1, it is characterized in that, under colour cast state, color adjustment calibration is carried out to the brightness of the monochromatic brightness of LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, the colorimetric parameter step consistent with parameter reference reference value comprises:
Judge, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, color adjustment calibration is carried out to the colorimetric parameter of the monochrome of LED light machine, until the colorimetric parameter of monochrome corresponding to LED light machine display effect is consistent with parameter reference reference value.
8. a color white balance calibration system, is characterized in that, comprising:
Color memory module, for obtaining brightness, the colorimetric parameter of LED light machine display effect initial monochromatic brightness, colorimetric parameter and white, and is set to parameter reference reference value that is monochromatic and white respectively by it;
Color detection module, for detecting real-time luminosity, the colorimetric parameter of monochrome corresponding to LED light machine display effect and white;
Color comparison module, for the colour cast state according to parameter reference reference value and real-time luminosity, colorimetric parameter determination LED light machine display effect;
Colorific adjustment module, carries out color adjustment calibration for the brightness of the monochromatic brightness to LED light machine, colorimetric parameter and white, colorimetric parameter, until the brightness of white corresponding to LED light machine display effect, colorimetric parameter are consistent with parameter reference reference value;
Color maintains module, for the brightness of the monochromatic brightness according to the LED light machine after calibration, colorimetric parameter and white, the white displays effect of colorimetric parameter maintenance LED light machine.
9. color white balance calibration system according to claim 8, is characterized in that: also comprise color adjustment module,
For judging whether colour cast exceedes default colour cast threshold values, if so, then regulates the color white of LED light machine, until the difference of the parameter reference reference value of the brightness of white corresponding to LED light machine display effect, colorimetric parameter and white 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, in LED light machine, whether preset range is exceeded to the number of times that the electric current flowing through LED adjusts, if, color adjustment calibration is carried out to the colorimetric parameter of the monochrome of LED light machine, until the colorimetric parameter of monochrome corresponding to LED light machine display effect is consistent with parameter reference reference value.
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| CN104485075A (en) * | 2014-12-30 | 2015-04-01 | 广东威创视讯科技股份有限公司 | Color mixture method for display screen of light emitting element |
| CN104966490B (en) * | 2015-07-14 | 2018-12-11 | 广东威创视讯科技股份有限公司 | A kind of more BIN display screen white balance adjusting method and devices |
| CN107221306B (en) * | 2017-06-29 | 2019-07-16 | 上海顺久电子科技有限公司 | The method, apparatus and display equipment of brightness of image in correction splicing device screen |
| CN112243306B (en) * | 2019-07-19 | 2023-03-14 | 致伸科技股份有限公司 | Color adjusting method of color light emitting element and input device with color adjusting function |
| CN110491349B (en) * | 2019-09-02 | 2021-09-21 | 厦门天马微电子有限公司 | Display control method, display control device and display module |
| CN112577719B (en) * | 2021-01-25 | 2023-06-06 | 歌尔科技有限公司 | LED aperture checking method and system, calibration method and system, and verification method and system |
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