CN102548112B - Mixed light implementation method - Google Patents

Abstract

The invention discloses a kind of mixed light implementation method, this mixed light is mixed by the luminescence of at least two light source institutes, and the method comprises: S1, calculate the luminous color tristimulus values of those light sources respectively; S2, repeatedly change light energy ratio between those light source institute luminescences, and under each light energy ratio, calculate the chromatic value of this mixed light; S3, each light energy ratio in step S2 and each chromatic value are recorded as a light energy ratio-chromatic value tables of data correspondingly; S4, for a required chromatic value, in this light energy ratio-chromatic value tables of data, check in a corresponding light energy ratio, then control those light sources and carry out luminescence according to this corresponding light energy ratio.The present invention can accurately obtain various chromatic value flexibly and the adjustable mixed light of brightness in wider colour gamut.

Description

Mixed light implementation method

Technical field

The present invention relates to LED illumination technology, particularly relate to a kind of mixed light implementation method.

Background technology

At present, along with expanding economy, room lighting, Landscape Lighting and architectural lighting have started more and more to be paid close attention to and pay attention to.Lighting technology only focuses on brightness from initial, pursues aesthetic feeling by now while pursuit brightness; Adopt by now from original adoption normal illumination sources and incorporate high-tech lighting source; Generally speaking, be that lighting source or illumination gimmick all become more diverse, make the city of China more and more beautiful for night thus.

In field of LED illumination, light source common is in the market generally several monochromatic LEDs such as red-light LED, green light LED, blue-ray LED, and a few can send the LED of complex light, such as, send blue light and gold-tinted to form white light LEDs of cold white light etc. simultaneously.In the application scenario of lighting source more and more diversified and wish that the illuminating effect realized is also under more and more colourful background, only rely on several existing monochromatic LED and several existing complex light LED to be obviously the desirable illuminating effect being difficult to realize riotous with colour, lively solid.

According to the theory of colorimetry, when ruddiness, green glow, blue light are carried out mixed light according to different light energy ratios, the mixed light of various color just can be obtained.So people just expect to introduce in the application scenario of lighting source by these mixed light means, by carrying out mixed light between existing light source, thus in a wider colour gamut, obtain the mixed light of various color.But, the mixed light means wanting practice so still also exist certain technical difficulty, such as, the mixed light obtained is being easy to occur colourity not just or the problem such as luminance shortage, this will certainly make the illuminating effect of actual acquisition be difficult to reach desirable, also can increase the debugging work load of operating personnel, and finally affect applying of this technology.

Summary of the invention

The technical problem to be solved in the present invention is the defect being difficult to accurately obtain flexibly in wider colour gamut the mixed light of various chromatic value in order to overcome prior art, provides a kind of mixed light implementation method that accurately can obtain the mixed light of various chromatic value in wider colour gamut flexibly.

The present invention solves above-mentioned technical problem by following technical proposals: a kind of mixed light implementation method, this mixed light is mixed by the luminescence of at least two light source institutes, its feature is, the method comprises: S1, calculate the luminous color tristimulus values of those light sources respectively; S2, repeatedly change light energy ratio between those light source institute luminescences, and under each light energy ratio, calculate the chromatic value of this mixed light; S3, each light energy ratio in step S2 and each chromatic value are recorded as a light energy ratio-chromatic value tables of data correspondingly; S4, for a required chromatic value, in this light energy ratio-chromatic value tables of data, check in a corresponding light energy ratio, then control those light sources and carry out luminescence according to this corresponding light energy ratio.Wherein, described light energy can embody with the form of luminous flux when practical application this mixed light implementation method of the present invention.

Preferably, also comprise after step s4: S5, under keeping those light sources to carry out luminous condition according to this corresponding light energy ratio, light energy luminous to those light sources in proportion regulates.

Preferably, those light sources are monochromatic source and/or complex light light source.

Preferably, those light sources are at least two in a white light source, a red-light source, a green-light source and a blue light source.

Preferably, those light sources are LED.

Preferably, the light energy by regulating the operating current of each LED to regulate those LED luminous.

Preferably, the light energy continuously adjustabe or multistage adjustable that those LED are luminous.

Positive progressive effect of the present invention is: utilize this mixed light implementation method of the present invention, only need rely on several existing monochromatic source and/or complex light light source, just in a wider colour gamut, accurately can obtain the mixed light of various chromatic value flexibly, this can meet the different demands of various colourful illuminating effect in different occasion fully.In addition, the present invention when keeping the chromatic value of the mixed light obtained constant, can also regulate the brightness of this mixed light, thus meeting the different demands of various colourful illuminating effect in different occasion further flexibly easily.

Accompanying drawing explanation

Fig. 1 is the relative spectral power distribution schematic diagram of red-light LED, green light LED, blue-ray LED and the white light LEDs adopted in the present invention.

Fig. 2 is the light energy-operating current relation schematic diagram of red-light LED, green light LED, blue-ray LED and the white light LEDs adopted in the present invention.

Fig. 3 is the schematic diagram of 1931CIE-XYZ standard colorimetric observer spectral tristimulus value.

Fig. 4 is photopic vision spectral luminous efficiency curve and noctovision spectral luminous efficiency curve schematic diagram.

Fig. 5 is 1931CIE-XYZ system chromatic diagram.

Embodiment

Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.

Since utilize the means of mixed light, therefore in this mixed light implementation method of the present invention, at least need employing two light sources, the light source certainly adopting more than three or three is also feasible equally.Wherein, in order to realize significant mixed light, the luminous chromatic value of each light source should be different.

The type of the present invention to adopted light source does not limit, and such as those light sources can be all LED.In addition, the light source adopted in the present invention can be both all monochromatic source, can be also all complex light light source, can also part be monochromatic source, part be complex light light source.

Just a red-light LED, a green light LED, a blue-ray LED and a white light LEDs is have employed in following embodiment.Just be the relative spectral power distribution P (λ) of these four LED shown in Fig. 1, curved line relation in this figure can rely on existing device accurately to record, what those curves represented respectively is in the light radiation wave-length coverage of corresponding LED, the radiant energy distribution state of each af at wavelength lambda.As can be seen from Fig. 1, this red-light LED, this green light LED, this blue-ray LED are monochromatic LED, its main peak lays respectively at 620nm, 520nm, 450nm place, this white light LEDs is then complex light LED, its white light is produced by blue chip and YAG aluminate yellow fluorescent powder, the main peak of blue chip is positioned at 450nm place, and the main peak of yellow fluorescent powder is then positioned at 550nm place.

When mixed light, these four LED can combination in any, that is: white+red, white+green, white+indigo plant, white+red green, white+turquoise, white+red indigo plant, white+RGB, red+green, green+blue, red+blue, red+green+indigo plant.

For these four LED, be described this mixed light implementation method of the present invention, it comprises step S1-S4.

S1, calculate the luminous color tristimulus values of this four LED respectively, the tristimulus values X that namely this red-light LED is luminous _red, Y _red, Z _red, the tristimulus values X that this green light LED is luminous _green, Y _green, Z _green, the tristimulus values X that this blue-ray LED is luminous _blue, Y _blue, Z _blue, the tristimulus values X that this white light LEDs is luminous _{in vain}, Y _{in vain}, Z _{in vain}.Concrete computational methods are as described below.

Three primary colors in the colourity theory that CIE (the international luminous lighting committee) recommends, namely the wavelength of red, green, blue is respectively 700nm, 546.1nm, 435.8nm, in 1931CIE-XYZ system, represent trichromatic values respectively with X, Y, Z.According to CIE regulation, the tristimulus values X caused by a LED, Y, Z can be represented by formula (1):

$X=K{\∫}_{380}^{780}P\left(\mathrm{\λ}\right)\stackrel{\‾}{x}\left(\mathrm{\λ}\right)\mathrm{d\λ}$

$Y=K{\∫}_{380}^{780}P\left(\mathrm{\λ}\right)\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{d\λ}---\left(1\right)$

$Z=K{\∫}_{380}^{780}P\left(\mathrm{\λ}\right)\stackrel{\‾}{z}\left(\mathrm{\λ}\right)\mathrm{d\λ}$

Integration can be replaced by summation formula (2) during actual operation:

$X=K\underset{\mathrm{\λ}=380}{\overset{780}{\mathrm{\Σ}}}P\left(\mathrm{\λ}\right)\stackrel{\‾}{x}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

$Y=K\underset{\mathrm{\λ}=380}{\overset{780}{\mathrm{\Σ}}}P\left(\mathrm{\λ}\right)\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}---\left(2\right)$

$Z=K\underset{\mathrm{\λ}=380}{\overset{780}{\mathrm{\Σ}}}P\left(\mathrm{\λ}\right)\stackrel{\‾}{z}\left(\mathrm{\λ}\right)\mathrm{\Δ\λ}$

In formula (2), K is Dynamic gene, for reflecting the size of light energy.Be the graph of a relation of the luminous relative light energy of these four LED and its operating current shown in Fig. 2, the curved line relation in this figure can rely on existing device accurately to record.After having known Fig. 2, only need regulate the operating current of a LED according to the curved line relation in this figure, just can realize, to the adjustment of the luminous light energy size of this LED, also just achieving the adjustment of the brightness to this LED.In the present embodiment, namely the regulative mode of this operating current can be designed to continuously adjustabe, also can be designed to multistage adjustable, such as: when the light energy size of a LED is divided into 255 rank, the span of Dynamic gene K is the integer between 0 ~ 255, according to the curved line relation shown in Fig. 2, the operating current of this LED is also correspondingly divided into 255 rank simultaneously, after this just can realizes 255 contrast joints of the brightness to this LED.

P (λ) in formula (2) is the relative spectral power distribution shown in Fig. 1.

In formula (2) be known " 1931CIE-XYZ standard colorimetric observer spectral tristimulus value ", their value as shown in Figure 3.Particularly, CIE regulation:

$\stackrel{\‾}{x}\left(\mathrm{\λ}\right)=\frac{x\left(\mathrm{\λ}\right)}{y\left(\mathrm{\λ}\right)}V\left(\mathrm{\λ}\right)$

$\stackrel{\‾}{y}\left(\mathrm{\λ}\right)=V\left(\mathrm{\λ}\right)---\left(3\right)$

$\stackrel{\‾}{z}\left(\mathrm{\λ}\right)=\frac{z\left(\mathrm{\λ}\right)}{y\left(\mathrm{\λ}\right)}V\left(\mathrm{\λ}\right)$

Wherein, what V (λ) represented is photopic vision spectral luminous efficiency.Human eye not only depends on the stimulation of light to the sensation of color, also depends on the visual characteristic of human eye, and known human eye photopic vision spectral luminous efficiency curve V (λ) and noctovision spectral luminous efficiency curve V ' (λ) are respectively as shown in Figure 4.

Shown in Fig. 5 is then known 1931CIE-XYZ system chromatic diagram, and wherein abscissa x represents red, and ordinate y represents green.X, y, z and tristimulus values X, between Y, Z, there is following relation:

$x=\frac{X}{X+Y+Z}$

$y=\frac{Y}{X+Y+Z}---\left(4\right)$

x+y+z＝1

Z represents blue.As seen from Figure 5, each wavelength X all correspond to different x (λ), y (λ), z (λ).

By the above-mentioned explanation to formula (1)-Shi (4), those skilled in the art just can calculate the luminous color tristimulus values of this four LED according to known colorimetry principle respectively.

S2, in these four LED, choose two, three respectively and whole LED carries out combination mixed light, and the light energy ratio repeatedly changed under each compound mode between those LED institute luminescences participating in mixed light, simultaneously also under each compound mode, calculate the chromatic value of this mixed light of acquisition under each light energy ratio.Circular is as described below.

As mentioned above, can realize nearly 11 kinds of combination light mixing ways between these four LED, the situation only combining mixed light for red-light LED and green light LED is herein described, the equal all fours of computational process under other various combination light mixing ways.

First by regulating the operating current of red-light LED and green light LED, regulate the light energy ratio between ruddiness and green glow, such as, by K _red(K namely above mentioned is for value during red-light LED): K _green(K namely above mentioned is for value during green light LED) is adjusted to 1: 5, then according to formula (4), the chromatic value of the mixed light now obtained is:

Then, the operating current regulating red-light LED and green light LED is continued, by K _red: K _greenbe adjusted to 1: 10, equally according to formula (4), the chromatic value of the mixed light now obtained is:

The rest may be inferred, the chromatic value of the mixed light obtained under the various light energy ratios under the various combination light mixing ways of these four LED, between those LED institute luminescences participating in mixed light is calculated.

S3, each light energy ratio between each LED institute luminescence under the whole combination light mixing ways in step S2 and corresponding each chromatic value are recorded as a light energy ratio-chromatic value tables of data correspondingly.So far the data basis of carrying out accurate mixed light has just been obtained.

Such as, in this tables of data wherein two be just: when the light energy ratio of ruddiness and green glow is 1: 5, the chromatic value of the mixed light obtained just is (the x of formula (5) gained, y), and when the light energy ratio of ruddiness and green glow is 1: 10, the chromatic value of mixed light obtained just is (x ', y ') of formula (6) gained.

S4, according to the concrete chromatic value of one needed for practical matter, in this light energy ratio-chromatic value tables of data, check in a corresponding light energy ratio, then control required respective sources and carry out luminescence according to this corresponding light energy ratio.

Such as, if according to customer requirement, need to realize chromatic value accurately meet in formula (6) (x ', y ') mixed light, now known by consulting this tables of data formed in step S3, this mixed light needs to be formed by red-light LED and green light LED mixed light, and both luminous light energy ratios need to be adjusted to 1: 10, after this only need regulate the operating current of red-light LED and green light LED simply, make the luminous light energy ratio of its reality meet 1: 10.

Certainly, in actual mechanical process, may there is multiple different combination light mixing way in the mixed light obtaining same chromatic value, and a comparatively easy combination light mixing way now can be selected arbitrarily to carry out.

Further, the present invention, can accurately obtain on the basis of the mixed light with ideal chroma flexibly, can also regulate the brightness of obtained mixed light neatly.

Such as, obtain chromatic value meet in formula (6) (x ', y ') mixed light after, if desired the brightness of this mixed light is lightened 1 times, then can by regulating the operating current of red-light LED and green light LED simply, make the luminous light energy of its reality improve 1 times simultaneously, namely brightness improves 1 times simultaneously, now their luminous light energy ratios between the two still meet 1: 10, the chromatic value of therefore obtained mixed light can not change, and only has its brightness to improve 1 times.

In sum, this mixed light implementation method of the present invention not only accurately can obtain the mixed light of various chromatic value flexibly in a wider colour gamut, can also when keeping the chromatic value of the mixed light obtained constant, regulate the brightness of this mixed light flexibly easily, thus meet the different demands of various colourful illuminating effect in different occasion.

Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these execution modes, but these change and amendment all falls into protection scope of the present invention.

Claims (5)

1. a mixed light implementation method, this mixed light is mixed by the luminescence of at least two light source institutes, it is characterized in that, those light sources are LED, and the method comprises:

S1, calculate the luminous color tristimulus values of those light sources respectively;

S2, repeatedly change light energy ratio between those light source institute luminescences, and under each light energy ratio, calculate the chromatic value of this mixed light;

S3, each light energy ratio in step S2 and each chromatic value are recorded as a light energy ratio-chromatic value tables of data correspondingly;

S4, for a required chromatic value, in this light energy ratio-chromatic value tables of data, check in a corresponding light energy ratio, then control those light sources and carry out luminescence according to this corresponding light energy ratio;

Wherein, the method light energy of regulating those LED luminous by regulating the operating current of each LED.

2. mixed light implementation method as claimed in claim 1, is characterized in that, also comprise after step s4:

S5, under keeping those light sources to carry out luminous condition according to this corresponding light energy ratio, light energy luminous to those light sources in proportion regulates.

3. mixed light implementation method as claimed in claim 2, it is characterized in that, those light sources are monochromatic source and/or complex light light source.

4. mixed light implementation method as claimed in claim 2, it is characterized in that, those light sources are at least two in a white light source, a red-light source, a green-light source and a blue light source.

5. mixed light implementation method as claimed in claim 1, is characterized in that, the light energy continuously adjustabe that those LED are luminous or multistage adjustable.