CN104485075A - Color mixture method for display screen of light emitting element - Google Patents
Color mixture method for display screen of light emitting element Download PDFInfo
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- CN104485075A CN104485075A CN201410851328.4A CN201410851328A CN104485075A CN 104485075 A CN104485075 A CN 104485075A CN 201410851328 A CN201410851328 A CN 201410851328A CN 104485075 A CN104485075 A CN 104485075A
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Abstract
The embodiment of the invention discloses a color mixture method for a display screen of a light emitting element. The color mixture method solves the technical problem that the display effect expected by design of the display screen cannot be obtained if conventional LED lamp bead products are adopted directly at present. In the color mixture method, each pixel of the display screen of a light emitting assembly is formed by three lamp beads and has a white equilibrium point reached in expectation. Each lamp bead is provided with a red control terminal, a green control terminal and a blue control terminal. The color mixture method comprises the steps of performing calculation to obtain standard red coordinates, standard green coordinates and standard blue coordinates according to standards as for each lamp bead; performing calculation to obtain theory red coordinates, theory green coordinates and theory blue coordinates of the white equilibrium point; taking one of the three lamp beads to serve as a red lamp bead, and respectively performing calculation to obtain three driving current parameters corresponding to the three control terminals of the red lamp bead, wherein color coordinates subjected to the total summation approach the theory red coordinates within a first range; respectively obtaining three driving current parameters of the green lamp bead and the blue lamp bead in the same way.
Description
Technical field
The present invention relates to a kind of light-emitting component display screen technology field, particularly relate to a kind of color mixing method of light-emitting component display screen.
Background technology
Large-sized luminescence component (Light Emitting Device, LED) display screen, as mosaic display screen, such as can be used for being used as colored large-scale advertisement billboard, again or the display screen of convention, can provide static or dynamic presentation content, therefore the application of LED display is also day by day extensive.
LED display is made up of pel array, and the Show Color of each pixel and brightness are formed by three color sub pixels colour mixtures of RGB (RGB).Three color sub pixels of RGB (RGB) send the brightness of its Individual colours respectively according to desired GTG, can produce color and the brightness of required display after mixing.The image of whole display screen is made up of pel array.
For the single luminescence component that display screen uses, it is not generally the luminescence component of single color, but the three end luminescence components that RGB three colors are packaged together, it has three current controling ends, respectively the brilliance control of corresponding red, green, blue.
As shown in Figure 1, to traditional three end luminescence components, such as, control the drive current of red end, the corresponding brightness controlling red color components of its meeting, but relation therebetween not linear relationship.Similarly, if will produce the light of green or blueness, it needs to apply drive current to red end or blue end respectively.
Below for three end luminescence components, also referred to as a lamp pearl.A lamp pearl is because designing difference, and its correspondence red (R), green (G), blue (B) can be different in the chromaticity coordinates position of chromaticity coordinates system, and its white light produced also can be different in white balance position.As shown in Figure 2, a conventional LED lamp bead product, it has corresponding red (R), green (G), blue (B) chromaticity coordinates according to product specification, its corresponding white balance point 50.
But for display screen, it has had the position of predetermined white balance point when designing, its generally can not with the position consistency of predetermined white balance point, and the pixel of display screen is by three lamp pearls, be used as the color light source of red (R), green (G), blue (B) respectively, to represent finer and smoother color level.Therefore, if directly adopt conventional LED lamp bead product, the technical matters that cannot obtain the display effect of expecting designed by display screen will be caused.
Summary of the invention
Embodiments provide a kind of color mixing method of light-emitting component display screen, nowadays directly adopt conventional LED lamp bead product if solved, will the technical matters that cannot obtain the display effect of expecting designed by display screen be caused.
The color mixing method of a kind of light-emitting component display screen that the embodiment of the present invention provides, comprise: each pixel of luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, wherein lamp pearl described in each has three control ends of RGB;
Wherein, the color mixing method of luminescence component display screen comprises:
For each this lamp pearl, calculate specification red scale, specification green cordinant, specification blue color coordinates according to specification;
Calculating will obtain the theoretical red scale of described white balance point, theoretical green cordinant, theoretical blue color coordinates;
The one getting described three lamp pearls is used as red light pearl, and described three control ends of corresponding described red light pearl, calculate three drive current parameters respectively, makes the chromaticity coordinates after total summation in the first scope close to described theoretical red scale;
The one getting described three lamp pearls is used as green light pearl, and described three control ends of corresponding described green light pearl, calculate three current control parameter respectively, makes the chromaticity coordinates after total summation in the second scope close to described theoretical green cordinant;
The one getting described three lamp pearls is used as Lan Dengzhu, and described three control ends of corresponding described blue lamp pearl, calculate three current control parameter respectively, the chromaticity coordinates making to add the General Logistics Department in the 3rd scope close to described theoretical blue color coordinates.
Preferably, the position of the described chromaticity coordinates after total summation is respectively apart from described theoretical red scale, described theoretical green cordinant or described theoretical blue color coordinates within 0.1.
Preferably, the position of the described chromaticity coordinates after total summation is respectively apart from described theoretical red scale, described theoretical green cordinant or described theoretical blue color coordinates within 0.05.
Preferably, the color mixing method of light-emitting component display screen also comprises:
Calculate the consumed power of described luminescence component display screen, and maximum gray degree.
Preferably, by each lamp pearl of each pixel of described luminescence component display screen, the corresponding whole current parameters wanting Show Color, set up a database.
The color mixing method of a kind of luminescence component display screen that the embodiment of the present invention provides, each pixel of luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, wherein lamp pearl described in each has multiple color controlling end, for lamp pearl described in each, obtain the first specification chromaticity coordinates, the second specification chromaticity coordinates, the 3rd specification chromaticity coordinates according to specification;
Wherein, the color mixing method of described luminescence component display screen comprises:
Calculate the first theoretical chromaticity coordinates, the second theoretical chromaticity coordinates, the 3rd theoretical chromaticity coordinates that described luminescence component display screen will obtain this white balance point;
Described three lamp pearls are used as the first colored lights pearl, the second colored lights pearl and tri coloured lantern pearl respectively, corresponding described first colored lights pearl, described second colored lights pearl and described tri coloured lantern pearl divide multiple color controlling end described in other, calculate multiple drive current parameter respectively, make the chromaticity coordinates after total summation in presetting range respectively close to described first theoretical chromaticity coordinates, described second theoretical chromaticity coordinates, described 3rd theoretical chromaticity coordinates.
Preferably, the position of the described chromaticity coordinates after total summation is respectively apart from described first theoretical chromaticity coordinates, described second opinion chromaticity coordinates or described 3rd theoretical chromaticity coordinates within 0.1.
Preferably, the position of the described chromaticity coordinates after total summation is respectively apart from described first theoretical chromaticity coordinates, described second opinion chromaticity coordinates or described 3rd theoretical chromaticity coordinates within 0.05.
Preferably, the color mixing method of light-emitting component display screen also comprises:
Calculate the consumed power of described luminescence component display screen, and maximum gray degree.
The color mixing method of a kind of luminescence component display screen that the embodiment of the present invention provides, each pixel of described luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, lamp pearl described in each has multiple color controlling end, for lamp pearl described in each, obtain the first specification chromaticity coordinates, the second specification chromaticity coordinates, the 3rd specification chromaticity coordinates according to specification;
Wherein, the color mixing method of described luminescence component display screen comprises:
Calculate the first theoretical chromaticity coordinates, the second theoretical chromaticity coordinates, the 3rd theoretical chromaticity coordinates that described luminescence component display screen will obtain described white balance point;
Described three lamp pearls are used as the first colored lights pearl, the second colored lights pearl and tri coloured lantern pearl respectively, the respectively described color controlling end of corresponding described first colored lights pearl, described second colored lights pearl and described tri coloured lantern pearl, calculate multiple drive current parameter respectively, make the chromaticity coordinates after total summation in a scope respectively close to described first theoretical chromaticity coordinates, described second theoretical chromaticity coordinates, described 3rd theoretical chromaticity coordinates.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
The color mixing method of a kind of light-emitting component display screen that the embodiment of the present invention provides, one of them color mixing method comprises: each pixel of luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, wherein each lamp pearl has three control ends of RGB; Wherein, the color mixing method of luminescence component display screen comprises: for each this lamp pearl, calculate specification red scale, specification green cordinant, specification blue color coordinates according to specification; Calculating will obtain the theoretical red scale of white balance point, theoretical green cordinant, theoretical blue color coordinates; The one getting three lamp pearls is used as red light pearl, and three control ends of corresponding red light pearl, calculate three drive current parameters respectively, makes the chromaticity coordinates after total summation in the first scope close to theoretical red scale; The one getting three lamp pearls is used as green light pearl, and three control ends of corresponding green light pearl, calculate three current control parameter respectively, makes the chromaticity coordinates after total summation in the second scope close to theoretical green cordinant; The one getting three lamp pearls is used as Lan Dengzhu, and three control ends of corresponding blue lamp pearl, calculate three current control parameter respectively, the chromaticity coordinates making to add the General Logistics Department in the 3rd scope close to theoretical blue color coordinates.In the present embodiment, based on the color mixing method of above-mentioned luminescence component display screen, the white balance point of corresponding design, through the correction of chromaticity coordinates, can reduce due to LED lamp bead respective specification difference cause white balance uneven phenomenon, also allow the specification of LED lamp bead adopted to have larger elasticity, and still reach and estimate uniform white balance, nowadays directly adopt conventional LED lamp bead product if solved, will the technical matters that cannot obtain the display effect of expecting designed by display screen be caused.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is traditional drive current of three end luminescence components and the relation schematic diagram of brightness;
Fig. 2 is the chromaticity coordinates position view of red (R), green (G), blue (B) of a traditional LED lamp bead;
Fig. 3 is the schematic diagram of the colour mixture mechanism of the luminescence component display screen of the color mixing method of a kind of light-emitting component display screen mentioned in the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of an embodiment of the color mixing method of a kind of light-emitting component display screen mentioned in the embodiment of the present invention.
Embodiment
Embodiments provide a kind of color mixing method of light-emitting component display screen, nowadays directly adopt conventional LED lamp bead product if solved, will the technical matters that cannot obtain the display effect of expecting designed by display screen be caused.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate institute's accompanying drawings to be described in detail below.Below provide multiple embodiment to illustrate, but the present invention is not limited only to lifted embodiment.
Luminescence component display screen of the present invention is made up of array of pixels.The Show Color of each pixel and brightness are formed by three color sub pixels colour mixtures of RGB (RGB).Color sub pixels is provided by a LED lamp bead.LED lamp bead has three control ends, controls the luminescence of RGB respectively, but only as the luminescence of a primary colors, such as, is the effect of red light pearl, green light pearl, Lan Dengzhu.A colored pixels example is by luminous according to point other shade of gray by three primary colors, and is mixed into desired color of light.
It should be noted that, the mode that generally will describe color describes with chromaticity coordinates.Fig. 3 is according to one embodiment of the invention, the schematic diagram of the colour mixture mechanism of luminescence component display screen.Refer to Fig. 3, during design display screen, generally can select a white balance point 100.White balance point 100 is such as referred to as with D65 at the present embodiment.According to desired white balance point 100, the position of colored pixels (nit), and the row total number of look display screen, can extrapolate theoretical red scale R ', theoretical green cordinant G ', theoretical blue color coordinates B '.The specification of display screen can require that the white balance point 100 of each pixel can the identical predetermined value of convergence, makes the white balance of each pixel can uniformity.
But, the general lamp pearl having manufactured volume production and peddled, its white balance point 50 can not be consistent with the white balance point 100 designed by display screen, and specification red scale R, the specification green cordinant G of same floor-lamp pearl, specification blue color coordinates B can not be consistent with the red scale R ' of theory, theoretical green cordinant G ', theoretical blue color coordinates B '.If directly adopted by lamp pearl, then can cause the error of color.
White balance point due to display screen is fixing can not variation, the present invention proposes specification red scale R, the specification green cordinant G of lamp pearl, the adjustment of specification blue color coordinates B, so can the lamp pearl peddled of wide selection market volume production, and the lamp pearl of specific standard need not be defined in, make design tolerance that display screen can be larger not be limited to the size heterogeneity of indivedual lamp pearl, and also elasticity can adopt the lamp pearl of volume production and reduce costs.
For producing the such as red lamp pearl of time pixel, its specification red scale R, specification green cordinant G, specification blue color coordinates B are as icon.Under Comprehensive Control by the drive current of three control ends of lamp pearl, it is desirable to produce the redness consistent with theoretical red scale R ', and be used as red colored lamp pearl.
It should be noted that and will reach theoretical red scale R ', it can not only adjust the electric current of red control end and reach, and it must coordinate the drive current of the control end of other two colors, can reach theoretical red scale R '.Therefore, theoretical red scale R ' can represent with formula (1):
Formula (1): R '=α R+ β G+ γ B.
Wherein R ', R, G, B as aforementioned be the chromaticity coordinates value of known (X, Y), and the ratio of the corresponding drive currents of α, β, γ tri-parameters needs to calculate to determine.That is, the vector of R ' be by R, G, B tri-vectorial add gross income to.
In this, ideally, the chromaticity coordinates obtained by α R+ β G+ γ B is identical with the red scale R ' of theory, but also admit of some errors in practical application, therefore, under chromaticity coordinates system, theoretical red scale R ' and α R+ β G+ γ B can degrees of closeness within 0.1 in distance, and are preferably the degree of closeness within 0.05, therefore the tolerance of some changes is had in the setting of drive current, without the need to definitely equal.
Same mode can calculate three parameter: α ', β ', γ ' and the α of two groups respectively to green light pearl and blue lamp pearl ", β ", γ ", its relation is such as formula shown in (2), (3):
Formula (2): G '=α ' R+ β ' G+ γ ' B.
Formula (3): B '=α " R+ β " G+ γ " B.
Be understandable that, by three parameters (α, β, γ) of three groups, (α ', β ', γ '), (α ", β ", γ "); respectively three lamp pearls are driven; therefore can produce the red light pearl required for theory, green light pearl, Lan Dengzhu, and there is predetermined white balance point 100
Each pixel of the present invention can have the chromaticity coordinates of above-mentioned corresponding white balance point 100 to adjust.The a little data of person can store foundation, with the adjustment as subsequent color and white balance with a database.In this, if the lamp pearl adopted is all same specification, therefore the chromaticity coordinates of R, G, B is all identical, then in fact only need calculating once.But, if the lamp pearl adopted has different size, then calculate individually according to its specification, but the mechanism calculated is identical, is only the difference had numerically.These information can be stored in database for follow-up.
Color correction mechanism embodiment illustrated in fig. 3 above comprehensive, the description that the color mixing method of display screen can be following.
Fig. 4 is according to one embodiment of the invention, the schematic flow sheet of the color mixing method of luminescence component display screen.Refer to Fig. 4, an embodiment of the color mixing method of a kind of luminescence component display screen provided in the embodiment of the present invention comprises:
In step S100, for display screen, can according to predetermined equilibrium point, referred to as D65; The position of colored pixels (nit), and the row total number of look display screen, and extrapolate theoretical red scale R ', theoretical green cordinant G ', theoretical blue color coordinates B '.In step S102, for adopted lamp pearl, obtain specification red scale R, specification green cordinant G, specification blue color coordinates B according to specification.According to following relation obtain three groups of adjustment parameter (α, β, γ), (α ', β ', γ '), (α ", β ", γ "), drive with corresponding RGB three lamp pearls respectively.
R’＝αR+βG+γB；
G’＝α’R+β’G+γ’B；
B’＝α”R+β”G+γ”B。
In step S104, after calculating red scale R ', theoretical green cordinant G ', theoretical blue color coordinates B ', can according to the specification of drive integrated circult (IC); The drive condition of the lamp pearl of such as LED; And display screen wattage etc. just can make the maximum gray degree of display screen exactly.
In aforesaid embodiment, primitive color light explains for general known red, green, blue, but under chromaticity coordinates system, its blend of colors can be not limited to red, green, blue.But according to identical principle, red, green, blue can be that other can be used for the combination of three coloured light of colour mixture, and not limit be RGB.
The present invention utilizes the drive current calculated to control the glow color of lamp pearl, makes to reach consistent with theoretical value, therefore can have consistent colour brightness between pixel.
In the present embodiment, based on the color mixing method of above-mentioned luminescence component display screen, the white balance point of corresponding design, through the correction of chromaticity coordinates, can reduce due to LED lamp bead respective specification difference cause white balance uneven phenomenon, also allow the specification of LED lamp bead adopted to have larger elasticity, and still reach and estimate uniform white balance, nowadays directly adopt conventional LED lamp bead product if solved, will the technical matters that cannot obtain the display effect of expecting designed by display screen be caused.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (10)
1. a color mixing method for light-emitting component display screen, is characterized in that, comprising: each pixel of luminescence component display screen is made up of three lamp pearls, and has a predetermined white balance point that will reach, and wherein lamp pearl described in each has three control ends of RGB;
Wherein, the color mixing method of luminescence component display screen comprises:
For each this lamp pearl, calculate specification red scale, specification green cordinant, specification blue color coordinates according to specification;
Calculating will obtain the theoretical red scale of described white balance point, theoretical green cordinant, theoretical blue color coordinates;
The one getting described three lamp pearls is used as red light pearl, and described three control ends of corresponding described red light pearl, calculate three drive current parameters respectively, makes the chromaticity coordinates after total summation in the first scope close to described theoretical red scale;
The one getting described three lamp pearls is used as green light pearl, and described three control ends of corresponding described green light pearl, calculate three current control parameter respectively, makes the chromaticity coordinates after total summation in the second scope close to described theoretical green cordinant;
The one getting described three lamp pearls is used as Lan Dengzhu, and described three control ends of corresponding described blue lamp pearl, calculate three current control parameter respectively, the chromaticity coordinates making to add the General Logistics Department in the 3rd scope close to described theoretical blue color coordinates.
2. the color mixing method of light-emitting component display screen according to claim 1, is characterized in that, the position of the described chromaticity coordinates after total summation is respectively apart from described theoretical red scale, described theoretical green cordinant or described theoretical blue color coordinates within 0.1.
3. the color mixing method of light-emitting component display screen according to claim 1, is characterized in that, the position of the described chromaticity coordinates after total summation is respectively apart from described theoretical red scale, described theoretical green cordinant or described theoretical blue color coordinates within 0.05.
4. the color mixing method of light-emitting component display screen according to claim 1, is characterized in that, the color mixing method of light-emitting component display screen also comprises:
Calculate the consumed power of described luminescence component display screen, and maximum gray degree.
5. the color mixing method of light-emitting component display screen according to claim 1, is characterized in that, by each lamp pearl of each pixel of described luminescence component display screen, the corresponding whole current parameters wanting Show Color, set up a database.
6. the color mixing method of a luminescence component display screen, it is characterized in that, each pixel of luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, wherein lamp pearl described in each has multiple color controlling end, for lamp pearl described in each, obtain the first specification chromaticity coordinates, the second specification chromaticity coordinates, the 3rd specification chromaticity coordinates according to specification;
Wherein, the color mixing method of described luminescence component display screen comprises:
Calculate the first theoretical chromaticity coordinates, the second theoretical chromaticity coordinates, the 3rd theoretical chromaticity coordinates that described luminescence component display screen will obtain this white balance point;
Described three lamp pearls are used as the first colored lights pearl, the second colored lights pearl and tri coloured lantern pearl respectively, corresponding described first colored lights pearl, described second colored lights pearl and described tri coloured lantern pearl divide multiple color controlling end described in other, calculate multiple drive current parameter respectively, make the chromaticity coordinates after total summation in presetting range respectively close to described first theoretical chromaticity coordinates, described second theoretical chromaticity coordinates, described 3rd theoretical chromaticity coordinates.
7. the color mixing method of luminescence component display screen according to claim 6, it is characterized in that, the position of the described chromaticity coordinates after total summation is respectively apart from described first theoretical chromaticity coordinates, described second opinion chromaticity coordinates or described 3rd theoretical chromaticity coordinates within 0.1.
8. the color mixing method of light-emitting component display screen according to claim 6, it is characterized in that, the position of the described chromaticity coordinates after total summation is respectively apart from described first theoretical chromaticity coordinates, described second opinion chromaticity coordinates or described 3rd theoretical chromaticity coordinates within 0.05.
9. the color mixing method of light-emitting component display screen according to claim 6, is characterized in that, the color mixing method of light-emitting component display screen also comprises:
Calculate the consumed power of described luminescence component display screen, and maximum gray degree.
10. the color mixing method of a luminescence component display screen, it is characterized in that, each pixel of described luminescence component display screen is made up of three lamp pearls, and have a predetermined white balance point that will reach, lamp pearl described in each has multiple color controlling end, for lamp pearl described in each, obtain the first specification chromaticity coordinates, the second specification chromaticity coordinates, the 3rd specification chromaticity coordinates according to specification;
Wherein, the color mixing method of described luminescence component display screen comprises:
Calculate the first theoretical chromaticity coordinates, the second theoretical chromaticity coordinates, the 3rd theoretical chromaticity coordinates that described luminescence component display screen will obtain described white balance point;
Described three lamp pearls are used as the first colored lights pearl, the second colored lights pearl and tri coloured lantern pearl respectively, the respectively described color controlling end of corresponding described first colored lights pearl, described second colored lights pearl and described tri coloured lantern pearl, calculate multiple drive current parameter respectively, make the chromaticity coordinates after total summation in a scope respectively close to described first theoretical chromaticity coordinates, described second theoretical chromaticity coordinates, described 3rd theoretical chromaticity coordinates.
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