CN109708017A

CN109708017A - A kind of generation method of light source and natural spectrum

Info

Publication number: CN109708017A
Application number: CN201811562296.0A
Authority: CN
Inventors: 宋成科; 牛占彪; 潘善峰; 林燕丹; 李浩然; 卢妍
Original assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Current assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-05-03

Abstract

The embodiment of the present invention discloses the generation method of a kind of light source and natural spectrum, is related to field of photoelectric technology, can provide a kind of healthy light source from the angle of Healthy Lighting, more fully influence of the spectral shape of consideration synthetic spectrum to human health.Light source, comprising: LED chip is used to emit the light of the first peak wavelength；First fluorescent powder, the second fluorescent powder and third fluorescent powder generate the light of the light of the second peak wavelength, the light of third peak wavelength, the 4th peak wavelength when being excited by the light of the first peak wavelength respectively；The intensity of residual ray after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder, the intensity of the light of second peak wavelength, the intensity ratio of the intensity of the light of third peak wavelength, the light of the 4th peak wavelength meets predetermined condition.

Description

A kind of generation method of light source and natural spectrum

Technical field

The embodiment of the present invention is related to the generation method of field of photoelectric technology more particularly to a kind of light source and natural spectrum.

Background technique

Currently, general be achieved in that of LED light source excites yellow fluorescent powder or yellow-green fluorescence powder by blue chip To realize.

That there is blue peaks is excessively high for such implementation, and spectrum is obviously incomplete, and it is larger to directly result in blue light harm, a The problems such as other colour table colour rendering index is poor.Healthy Lighting is increasingly widely recognized as, which type of light source to be Healthy Lighting about Light source, have many different sayings.Universal saying is the colour rendering index of all 15 kinds of colour tables all to be accomplished 90 or more, just It can be referred to as full spectrum.Full spectrum itself is not from the definition of the angle of Healthy Lighting, and definition itself is also not Comprehensively, colour rendering is only taken into account, influence of the integrality of spectrum to health is had ignored.

Wherein, conventional to excite yellow fluorescent powder or yellow-green fluorescence powder to realize the scheme of white light by blue-light LED chip In, the fluorescent powder type for participating in excitation does not exceed two kinds, the proportion of chip and fluorescent powder only consider chromaticity coordinates, colour rendering index, The indexs such as light efficiency.Since conventional scheme only considers the indexs such as chromaticity coordinates, colour rendering index, light efficiency, do not consider spectral shape to human body The influence of health, such as spectrum integrality and low blue light harm etc., therefore can not achieve healthy light source.

Summary of the invention

The embodiment of the present invention provides a kind of light source and the generation method with natural spectrum, can be from the angle of Healthy Lighting It sets out, more fully influence of the spectral shape of consideration synthetic spectrum to human health provides a kind of healthy light source.

In a first aspect, providing a kind of light source, comprising: LED chip, the LED chip is for emitting the first peak wavelength Light；Three kinds of fluorescent powders, wherein the first fluorescent powder when being excited by the light of first peak wavelength, generates the second peak value wave Long light；Second fluorescent powder generates the light of third peak wavelength when being excited by the light of first peak wavelength；The Three fluorescent powders generate the light of the 4th peak wavelength when being excited by the light of first peak wavelength；First peak wavelength Light by the first fluorescent powder, the second fluorescent powder and third fluorescent powder absorb after residual ray intensity, the second peak wavelength Light intensity, the intensity ratio of the light of the intensity of the light of third peak wavelength and the 4th peak wavelength meets predetermined Condition, so that the residual ray, the light of the second peak wavelength, the light of third peak wavelength and the 4th peak wavelength Light light mixing forms the light for meeting nature spectrum；Wherein, the predetermined condition, by the residual ray, the second peak value wave Long light, the light of third peak wavelength, the synthetic spectrum that the light of the 4th peak wavelength is mixed to form are evaluated It generates；One or more at least four lighting parameters of the synthetic spectrum are evaluated, the lighting parameter is generated Corresponding scoring, wherein the lighting parameter includes at least colour temperature accuracy, colour rendering, color tolerance and spectrum similarity；Root Match according to the corresponding scoring of every lighting parameter of the synthetic spectrum with target nature spectrum, it is each when the synthetic spectrum When the corresponding scoring of item lighting parameter meets the requirement of target nature spectrum, the predetermined condition is determined.

Second aspect provides a kind of generation method of natural spectrum based on light source described in first aspect, comprising: by institute The residual ray after the light of the first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder is stated, the The light of two peak wavelengths, the light of third peak wavelength, the light of the 4th peak wavelength carry out being mixed to form synthetic spectrum；It is right One or more at least four lighting parameters of the synthetic spectrum are evaluated, and generate that the lighting parameter is corresponding to be commented Point, wherein the lighting parameter includes at least colour temperature accuracy, colour rendering, color tolerance and spectrum similarity；According to the conjunction Match at the corresponding scoring of every lighting parameter of spectrum with target nature spectrum, when every illumination ginseng of the synthetic spectrum When the corresponding scoring of number meets the requirement of target nature spectrum, the predetermined condition is determined, in order to which the light source is according to Predetermined condition generates the target nature spectrum.

The light of the first peak wavelength generated in the above scheme based on LED chip in this way excites three kinds of fluorescent powders to generate The light of different peak wavelengths, then by the light of the first peak wavelength by the first fluorescent powder, the second fluorescent powder, third fluorescent powder The light of residual ray after absorption, the light of the second peak wavelength, the light of third peak wavelength, the 4th peak wavelength mixes shape At synthetic spectrum, and the light of the first peak wavelength is by remaining after the first fluorescent powder, the second fluorescent powder, the absorption of third fluorescent powder The intensity of light, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength, the light of the 4th peak wavelength The intensity ratio of line meets predetermined condition, due to, predetermined condition by the residual ray, the second peak wavelength light, The light of three peak wavelengths, the synthetic spectrum that the light of the 4th peak wavelength is mixed to form carry out evaluation generation；To synthesis One or more at least four lighting parameters of spectrum are evaluated, and the corresponding scoring of lighting parameter are generated, wherein illuminating Parameter includes at least colour temperature accuracy, colour rendering, color tolerance and spectrum similarity；According to every lighting parameter of synthetic spectrum Corresponding scoring matches with target nature spectrum, when the corresponding scoring of every lighting parameter of synthetic spectrum meets target nature When the requirement of spectrum, predetermined condition is determined；So that residual ray, the light of the second peak wavelength, third peak wavelength The light formation of light, the 4th peak wavelength meets the light of target nature spectrum；So as to go out from the angle of Healthy Lighting Hair, more fully influence of the spectral shape of consideration synthetic spectrum to human health provide a kind of healthy light source.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of flow chart of the generation method of the natural spectrum for light source that the embodiment of the present invention provides；

Fig. 2 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme one that the embodiment of the present invention provides；

Fig. 3 is the power distribution schematic diagram of the synthetic spectrum for the scheme one that the embodiment of the present invention provides；

Fig. 4 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme one that the embodiment of the present invention provides；

Fig. 5 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme two that the embodiment of the present invention provides；

Fig. 6 is the power distribution schematic diagram of the synthetic spectrum for the scheme two that the embodiment of the present invention provides；

Fig. 7 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme two that the embodiment of the present invention provides；

Fig. 8 is the spectral chromaticity coordinate schematic diagram of the natural radiant for the scheme two that the embodiment of the present invention provides；

Fig. 9 is the power distribution schematic diagram of the spectrum of the natural radiant for the scheme two that the embodiment of the present invention provides；

Figure 10 is the colorimetric properties schematic diagram of the spectrum of the natural radiant for the scheme two that the embodiment of the present invention provides；

Figure 11 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme three that the embodiment of the present invention provides；

Figure 12 is the power distribution schematic diagram of the synthetic spectrum for the scheme three that the embodiment of the present invention provides；

Figure 13 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme three that the embodiment of the present invention provides；

Figure 14 is the spectral chromaticity coordinate schematic diagram of the natural radiant for the scheme three that the embodiment of the present invention provides；

Figure 15 is the power distribution schematic diagram of the spectrum of the natural radiant for the scheme three that the embodiment of the present invention provides；

Figure 16 is the colorimetric properties schematic diagram of the spectrum of the natural radiant for the scheme three that the embodiment of the present invention provides；

Figure 17 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme four that the embodiment of the present invention provides；

Figure 18 is the power distribution schematic diagram of the synthetic spectrum for the scheme four that the embodiment of the present invention provides；

Figure 19 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme four that the embodiment of the present invention provides；

Figure 20 is the spectral chromaticity coordinate schematic diagram of the natural radiant for the scheme four that the embodiment of the present invention provides；

Figure 21 is the power distribution schematic diagram of the spectrum of the natural radiant for the scheme four that the embodiment of the present invention provides；

Figure 22 is the colorimetric properties schematic diagram of the spectrum of the natural radiant for the scheme four that the embodiment of the present invention provides；

Figure 23 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme five that the embodiment of the present invention provides；

Figure 24 is the power distribution schematic diagram of the synthetic spectrum for the scheme five that the embodiment of the present invention provides；

Figure 25 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme five that the embodiment of the present invention provides；

Figure 26 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme six that the embodiment of the present invention provides；

Figure 27 is the power distribution schematic diagram of the synthetic spectrum for the scheme six that the embodiment of the present invention provides；

Figure 28 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme six that the embodiment of the present invention provides；

Figure 29 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme seven that the embodiment of the present invention provides；

Figure 30 is the power distribution schematic diagram of the synthetic spectrum for the scheme seven that the embodiment of the present invention provides；

Figure 31 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme seven that the embodiment of the present invention provides；

Figure 32 is the spectral chromaticity coordinate schematic diagram of the natural radiant for the scheme seven that the embodiment of the present invention provides；

Figure 33 is the power distribution schematic diagram of the spectrum of the natural radiant for the scheme seven that the embodiment of the present invention provides；

Figure 34 is the colorimetric properties schematic diagram of the spectrum of the natural radiant for the scheme seven that the embodiment of the present invention provides；

Figure 35 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme eight that the embodiment of the present invention provides；

Figure 36 is the power distribution schematic diagram of the synthetic spectrum for the scheme eight that the embodiment of the present invention provides；

Figure 37 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme eight that the embodiment of the present invention provides；

Figure 38 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme nine that the embodiment of the present invention provides；

Figure 39 is the power distribution schematic diagram of the synthetic spectrum for the scheme nine that the embodiment of the present invention provides；

Figure 40 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme nine that the embodiment of the present invention provides；

Figure 41 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme ten that the embodiment of the present invention provides；

Figure 42 is the power distribution schematic diagram of the synthetic spectrum for the scheme ten that the embodiment of the present invention provides；

Figure 43 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme ten that the embodiment of the present invention provides；

Figure 44 is the chromaticity coordinates schematic diagram of the synthetic spectrum for the scheme 11 that the embodiment of the present invention provides；

Figure 45 is the power distribution schematic diagram of the synthetic spectrum for the scheme 11 that the embodiment of the present invention provides；

Figure 46 is the colorimetric properties schematic diagram of the synthetic spectrum for the scheme 11 that the embodiment of the present invention provides.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

The mankind be always maintained at over the past thousands of years this begin work at sunrise, the life pattern of ending at sunset.It is in natural light for a long time Under environment, the physiology and psychology of people is all adapted with solar spectrum.From this view, only solar spectrum is only and meets people's Circadian rhythm, to the light source that people is most healthy.The present invention for standard, is realized with solar spectrum (natural spectrum) by phosphor technologies Close to the light source of solar spectrum, also referred to as natural light.Natural light technology, can be with human body by manual simulation's solar spectrum Circadian rhythm is adapted, and low blue light harm, high color rendering index (CRI) is real Healthy Lighting light source, be can satisfy people and is shone health Bright demand.And in the conventional scheme for exciting yellow fluorescent powder or yellow-green fluorescence powder realization white light by blue-light LED chip, The fluorescent powder type for participating in excitation does not exceed two kinds, and the proportion of chip and fluorescent powder only considers chromaticity coordinates, colour rendering index, light efficiency Etc. indexs.Since conventional scheme only considers the indexs such as chromaticity coordinates, colour rendering index, light efficiency, do not consider spectral shape to human health Influence, such as spectrum integrality and low blue light harm etc., therefore can not achieve healthy light source.

To solve the above problems, embodiments herein provides a kind of light source, comprising: LED chip, the LED chip are used In the light for emitting the first peak wavelength；Three kinds of fluorescent powders, wherein the first fluorescent powder is by the light of first peak wavelength When excitation, the light of the second peak wavelength is generated；Second fluorescent powder is generated when being excited by the light of first peak wavelength The light of third peak wavelength；Third fluorescent powder generates the 4th peak value wave when being excited by the light of first peak wavelength Long light；Residual ray after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder, third fluorescent powder Intensity, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength, the light of the 4th peak wavelength it is strong The ratio between degree meets predetermined condition, so that the light of the residual ray, the light of the second peak wavelength, third peak wavelength, the The light light mixing of four peak wavelengths forms the light for meeting target nature spectrum.

Wherein, predetermined condition is based on such as under type generation, shown referring to Fig.1, includes the following steps:

101, after the light of the first peak wavelength being absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of residual ray, the light of the second peak wavelength, the light of third peak wavelength, the 4th peak wavelength is mixed to form Synthetic spectrum.

102, one or more at least four lighting parameters of synthetic spectrum are evaluated, generates lighting parameter pair The scoring answered, wherein lighting parameter includes at least colour temperature accuracy, colour rendering, color tolerance and spectrum similarity.

103, matched according to the corresponding scoring of every lighting parameter of synthetic spectrum with target nature spectrum, when synthesis light When the corresponding scoring of every lighting parameter of spectrum meets the requirement of target nature spectrum, predetermined condition is determined, in order to light source root Target nature spectrum is generated according to predetermined condition.

Since predetermined condition is used to limit the light of the first peak wavelength by the first fluorescent powder, the second fluorescent powder and third The intensity of residual ray after fluorescent powder absorbs, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength, The intensity ratio of the light of 4th peak wavelength, therefore when the corresponding scoring of every lighting parameter of synthetic spectrum does not meet target When the requirement of natural spectrum, then the intensity by adjusting residual ray, the intensity of the light of the second peak wavelength, third peak are needed It is worth the intensity of the light of wavelength, regenerates synthetic spectrum after the intensity of the light of the 4th peak wavelength, and execute step 102- 103 the step of, until corresponding score of every lighting parameter of synthetic spectrum meets the requirement of target nature spectrum.

Wherein, it can be realized by fluorescent powder matching technique by residual ray, the light of the second peak wavelength in above scheme Line, the light of third peak wavelength, the 4th peak wavelength light carry out being mixed to form synthetic spectrum；Specifically, can use Coordinate matching illustratively can preferentially carry out Spectral matching with chromaticity coordinates；Or Spectral matching can be used, illustrative time All combinations for giving into light splitting are gone through, determine optimal solution；Or it can be illustratively similar with spectrum using heredity matching Degree is preferential to carry out Spectral matching.

To being described as follows for the generating mode of above-mentioned predetermined condition:

Synthetic spectrum is generated in a step 101.It wherein, can be by optical sensor in specific position in step 101 The synthetic spectrum issued to light source detects, to obtain the synthetic spectrum.

Specific step 102 includes the following steps S1-S4:

S1, the colour temperature accuracy of synthetic spectrum is evaluated, generates the scoring of the colour temperature accuracy of synthetic spectrum.

Specific step S1 includes: that bring the colour temperature of the colour temperature of synthetic spectrum and standard spectrum into synthetic spectrum colour temperature accurate Property score curve calculate synthetic spectrum colour temperature accuracy scoring, wherein synthetic spectrum colour temperature accuracy score curve be used for table Show the corresponding relationship of the scoring of the difference of the colour temperature of synthetic spectrum and the colour temperature of standard spectrum and the colour temperature accuracy of synthetic spectrum. Wherein standard spectrum uses nature spectrum.

Illustratively, synthetic spectrum colour temperature accuracy score curve are as follows:

P_CCT=(- a × 10^-10×T_F ³+b×10^-6×T_F ²-c×10^-2×T_F-d)×|T-T_F|+100；

Wherein, P_CCTFor the scoring of the colour temperature accuracy of synthetic spectrum, T is the colour temperature of synthetic spectrum, T_FFor standard spectrum Colour temperature, a, b, c, d are constant.

Specifically, wherein synthetic spectrum colour temperature accuracy score curve is used to indicate the colour temperature and standard spectrum of synthetic spectrum Colour temperature difference and synthetic spectrum colour temperature accuracy scoring corresponding relationship.Synthetic spectrum colour temperature accuracy score curve Acquisition modes it is as follows:

Calculate the colour temperature T of synthetic spectrum and the colour temperature T of standard spectrum_FDifference；Ideally, the colour temperature of synthetic spectrum The colour temperature T of T and standard spectrum_FIt is equal, i.e., by difference value zero when it is corresponding first scoring take 100 points, the colour temperature T of synthetic spectrum With the colour temperature T of standard spectrum_FDifference value colour temperature tolerance Δ T when, corresponding second scoring takes 60 points to carry out curve fitting, raw At synthetic spectrum colour temperature accuracy score curve.Wherein, provide that the colour temperature value range of Plays spectrum is T in American Standard_F±Δ T。

Δ T=1.1900 × 10-⁸×T_F ³-1.5434×10-⁴×T_F ²+0.7168×T_F-902.55。

Wherein, in a kind of synthetic spectrum colour temperature accuracy score curve of acquisition that carried out curve fitting according to aforesaid way Constant value are as follows: a=-2.975, b=3.858, c=1.792, d=22.56375.

Certainly, for different international standards, the colour temperature T of standard spectrum_FValue is not also usually identical, as shown in table 1, mentions For the corresponding relationship of the colour temperature of a kind of Europe superscript and the standard spectrum of American Standard and colour temperature classification.

Table 1

S2, the colour rendering of synthetic spectrum is evaluated, generates the scoring of the colour rendering of synthetic spectrum.

Specifically, using CIE (commission internationale de L'Eclairage, international lighting committee member Meeting) recommend test color method with colour rendering index CRI (color rendition index) come quantitative assessment light source generation conjunction At the colour rendering of spectrum.The reproducibility of color is evaluated using CRI, the colour rendering index of light source is higher, and colour rendering is just better.See Formula P_CRI=R_a, R_aFor colour rendering index, P_CRIFor the scoring of the colour rendering of synthetic spectrum.

S3, the color tolerance of synthetic spectrum is evaluated, generates the scoring of the color tolerance of synthetic spectrum.

Step S3 is specifically included: being brought the color tolerance of synthetic spectrum into synthetic spectrum color tolerance score curve and is calculated synthesis light The scoring of the color tolerance of spectrum；Synthetic spectrum color tolerance score curve are as follows: P_SDCM=-α × SDCM+100, P_SDCMFor synthetic spectrum The scoring of color tolerance, SDCM (standard deviation of coloe matching, standard color-mixture are poor) are synthetic spectrum Color tolerance, α is constant.

Wherein color tolerance is used to evaluate the chromaticity difference between the color dot of synthetic spectrum and the color dot of standard spectrum, therefore, The color tolerance of synthetic spectrum can be calculated according to the center chromaticity coordinates of the center chromaticity coordinates of synthetic spectrum and standard spectrum；It is specific public Formula is provided by IEC 60081:

g₁₁Δx²+2g₁₂ΔxΔy+g₂₂Δy²=K², Δ x, Δ y indicate the center chromaticity coordinates and standard spectrum of synthetic spectrum Center chromaticity coordinates error, g11, g12, g22 indicate the coefficient that is determined by each coordinates of targets value, and K is color tolerance.

Wherein, Europe superscript and the center chromaticity coordinates of each colour temperature of American Standard are referring to shown in table 2,3, and wherein table 2 is to meet solid photograph The vertex chromaticity coordinates of the tolerance quadrangle of the center chromaticity coordinates and center chromaticity coordinates of each colour temperature of bright (SSL) product specification. Table 3 shows the corresponding relationship of colour temperature classification and colour temperature and center chromaticity coordinates, and wherein F indicates the annex of value and IEC60081 D, P indicate value close to Planckian locus (planckian curve).Wherein, Center point refers to center chromaticity coordinates, Tolerance Quadrangle refers to the vertex of the tolerance quadrangle of center chromaticity coordinates.Colour marking refers to colour type, CCT (Tc) refers to colour temperature, and Chromaticity coordinates refers to chromaticity coordinates (chromaticity coordinate).

Table 2

Table 3

Wherein, coloration specification is worked out by ANSI in American Standard, and the tolerance quadrangle of definition (meets and works as with 7 step MacAdam ellipses Preceding Energy Star lighting criteria) overlapping, and therefore have nominal CCT identical with Energy Star fluorescent lighting fixture.Europe superscript then uses The mode of 5SDCM MacAdam's ellipse evaluates color accuracy.Rule of China's standard GB/T/T 24823 for chromaticity tolerance Rule uses the judgment criteria of 7SDCM MacAdam's ellipse.Therefore, it is set as when the color tolerance of ideal situation synthetic spectrum is 0 Divide 100, color tolerance is set as score 60 for the case where 7SDCM, carries out linear fit, and the evaluation point of synthetic spectrum color tolerance can be obtained Are as follows: P_SDCM=-5.714 × SDCM+100.It needs to distinguish Europe superscript and American Standard when calculating SDCM.

S4, the spectrum similarity of synthetic spectrum is evaluated, generates the scoring of the spectrum similarity of synthetic spectrum.

Spectrum similarity is used to measure the similarity degree of the spectrum in the wave-length coverage entirely measured, can use related coefficient (spectrum similarity) is estimated.Therefore step 105 specifically:

Using formulaCalculate the spectrum of synthetic spectrum and standard spectrum Similarity, in which: x is the spectral value of synthetic spectrum, and y is the spectral value of standard spectrum, x_iFor the spectrum of the synthetic spectrum of i wave band Value, y_iFor the spectral value of the standard spectrum of i wave band,For the average light spectrum of synthetic spectrum,For the averaged spectrum of standard spectrum Value, δ_xyFor the spectral value of synthetic spectrum and the spectral value covariance of standard spectrum, δ_xxFor the standard of the spectral value of synthetic spectrum Difference, δ_yyFor the standard deviation of the spectral value of standard spectrum

According to the scoring of the spectrum similarity of spectrum similarity calculation synthetic spectrum.SpeciallyWherein P_SFor the scoring of the spectrum similarity of synthetic spectrum, γ_xyFor spectrum similarity.

Certain embodiments herein does not limit step S1-S4 the sequence executed, i.e., can be with any in the present invention Sequence executes step S1-S4, and the present invention is not limited to colour temperature accuracys, colour developing for the lighting parameter of synthetic spectrum Property, color tolerance and spectrum similarity also can be achieved on that is, when expanding to five or five or more other lighting parameters 's.

Finally in step 103 according to the corresponding scoring of every lighting parameter of synthetic spectrum and target nature spectrum phase Match, when the corresponding scoring of every lighting parameter of synthetic spectrum meets the requirement of target nature spectrum, determines predetermined condition, with Target nature spectrum is generated according to predetermined condition convenient for light source.Since predetermined condition is used to limit the light quilt of the first peak wavelength The intensity of residual ray after first fluorescent powder, the second fluorescent powder are absorbed with, third fluorescent powder, the light of the second peak wavelength it is strong Degree, the intensity of the light of third peak wavelength, the intensity ratio of the light of the 4th peak wavelength, therefore work as the items of synthetic spectrum When the corresponding scoring of lighting parameter does not meet the requirement of target nature spectrum, then the intensity by adjusting residual ray is needed, the The intensity of the light of two peak wavelengths, the intensity of the light of third peak wavelength, weight after the intensity of the light of the 4th peak wavelength Newly-generated synthetic spectrum, and the step of executing step 102-103, until the corresponding scoring symbol of every lighting parameter of synthetic spectrum Close the requirement of target nature spectrum.

In a kind of illustrative scheme, the implementation of step 103 are as follows: when the every lighting parameter for determining synthetic spectrum When corresponding scoring is all larger than certain third threshold score (such as 75 point), determine that synthetic spectrum meets target nature Requirement of Spectrum.Example Such as, as the scoring P for determining the colour temperature accuracy according to synthetic spectrum_CCT, colour rendering scoring P_CRI, color tolerance scoring P_SDCMWith And the scoring P of spectrum similarity_S75 timesharing are all larger than, determine that synthetic spectrum meets target nature Requirement of Spectrum.It certainly is raising Accuracy is evaluated, in another illustrative scheme, the implementation of step 103 are as follows: firstly, according to the items of synthetic spectrum The importance of lighting parameter is that the corresponding scoring of every lighting parameter configures comprehensive weight；Then it is shone according to the items of synthetic spectrum Bright parameter and the comprehensive weight of the corresponding scoring configuration of every lighting parameter calculate the comprehensive score of synthetic spectrum；It is comprehensive when determining When closing score more than or equal to certain first threshold score (such as 82 point), determine that synthetic spectrum meets target nature Requirement of Spectrum.

In specific following example, with four lighting parameter colour temperature accuracys, colour rendering, color tolerance and spectrum similarity For be illustrated: according to indices in the colour temperature accuracy of synthetic spectrum, colour rendering, color tolerance and spectrum similarity Importance is that the corresponding scoring of indices configures comprehensive weight；Then, according to the scoring of the colour temperature accuracy of synthetic spectrum, aobvious The scoring of color, the scoring of color tolerance, the scoring of spectrum similarity and the corresponding comprehensive weight of indices calculate synthesis light The comprehensive score of spectrum；When determining that comprehensive score is greater than or equal to first threshold score, determine that synthetic spectrum meets target nature Requirement of Spectrum.

For example, being weighed in conjunction with the requirement of practical experience and production product for the importance between single lighting parameter Weighing apparatus, can be used Analytic Hierarchy Process Model method and be adjusted to the weight of single lighting parameter.Subjectivity should reduced to the greatest extent Objectivity and accuracy random, that improve weight, have under the principle of flexibility and operability again, use level first Analytic approach carries out distinguishing hierarchy to the Bias model of synthetic spectrum and standard spectrum, as shown in Figure 2.Wherein destination layer is to close At the Bias of spectrum and standard spectrum, rule layer includes colour temperature accuracy, colour rendering, color tolerance, spectrum similarity four Lighting parameter, measure layer include that different optics is formulated 1-n.Importance structural matrix such as 4 institute of table according to every lighting parameter Show:

	Colour temperature accuracy	Colour rendering	Color tolerance	Spectrum similarity	Wi
						Colour temperature accuracy	1	1/6	1/3	1/9	0.0466
Colour rendering	6	1	3	1/3	0.2571
						Color tolerance	3	1/3	1	1/6	0.1052
Spectrum similarity	9	3	6	1	0.5912

Table 4

Wherein, Wi indicates the weight of each index, and the corresponding scale meaning of each index is as shown in table 5:

Table 5

Specifically, Wi calculation is as follows: it sums to each column of matrix, and each column is normalized, A new matrix is obtained, as shown in table 6:

Table 6

It sums to the every a line of matrix shown in table 6, and normalized obtains matrix shown in table 7:

Table 7

Consider, further increase the efficiency of algorithm, further includes in the items to determine synthetic spectrum before step 103 The corresponding scoring of lighting parameter is all larger than certain second threshold score (75 points), is then weighed again by configuring for each lighting parameter Weight, calculates the comprehensive score of synthetic spectrum, otherwise directly thinks that synthetic spectrum does not meet target nature Requirement of Spectrum, reduces in this way Calculation amount.

It is exportable after calculating and inputting physical parameter (relative spectral power distributions) accordingly, for a certain synthetic spectrum Four-dimensional assessment models, to describe the quality of the synthetic spectrum various aspects.The comprehensive score of model is adding for every evaluation score Weight average.

P_Overall=a₁P_CCT+a₂P_CRI+a₃P_SDCM+a₄P_S+bK

Wherein, P_CCTFor the evaluation score of colour temperature accuracy；P_CRIFor the colour developing quality evaluation score of synthetic spectrum；P_SDCMFor Color tolerance evaluates score；P_SFor spectrum similarity evaluation score；a_iIt (i=1,2,3,4) is weight；BK serves as reasons as item, K is expanded Other do not use up evaluates score caused by lighting parameter, b is the weight of K, and the sum of weight of every lighting parameter is 1.It here can be with The weight for defaulting every lighting parameter is equal, but the practical experience for considering user and the specific requirement to product, can pass through level Analysis model adjusts the weight of every lighting parameter, the comprehensive score being more applicable in.Under default situations, joined by four illuminations Several arithmetic averages obtains overall merit score P_Overall, referred to as " natural light spectral synthesis evaluates score ".

Wherein, in some instances, LED chip is purple light chip, and the first peak wavelength belongs to section [412.5nm- 417.5nm]；Second peak wavelength is 460nm；Third peak wavelength is 540nm；4th peak wavelength is 640nm.In this way, the One fluorescent powder can be SSLRAD460, and the second fluorescent powder can be NVU540, and third fluorescent powder can be NUV640.Some In example, LED chip is blue chip, and the first peak wavelength belongs to section [450nm-452.5nm]；Second peak wavelength is 490nm；Third peak wavelength is 535nm.

LED chip is blue chip, for 2700K, 3000K, 3500K, 4000K, 4500K, 5000K colour temperature natural light Spectrum, the first fluorescent powder are YGNO490H, and the second fluorescent powder is YGG535E, and third fluorescent powder is YGR670L.Illustrative first Fluorescent powder can use YGNO490H nitrogen oxides, the second fluorescent powder can be able to be for YGG535E aluminate, third fluorescent powder YGR670L nitride.LED chip is blue chip, and for 5700K, 6500K colour temperature nature spectrum, the first fluorescent powder is YGNO490H, the second fluorescent powder are YGG535E, and third fluorescent powder is YGR630L.Illustrative first fluorescent powder can use It can be YGR630L nitride that YGNO490H nitrogen oxides, the second fluorescent powder, which can be YGG535E aluminate, third fluorescent powder,.

LED chip is purple light chip, and for 5000K, 5700K, 6500K colour temperature nature spectrum, the first fluorescent powder can be SSLRAD460, the second fluorescent powder can be NVU540, and third fluorescent powder can be NUV640.Illustrative first fluorescent powder can It can be able to be NUV640 nitridation for NVU540 aluminate, third fluorescent powder to use SSLRAD460 silicate, the second fluorescent powder Object.

The typical natural spectrum of the natural spectrum LED reference that the present invention develops, luminescent color reference lighting source color standard, It is purple light chip for LED chip, it is total to develop 5000K, 5700K, 6500K colour temperature nature spectrum, matching scheme and knot Fruit is as follows:

Scheme one: the colour temperature of the target nature spectrum is 5000K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 0.01:4.73: 38.1:21.07。

Wherein for one: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1322,0.0783), (0.3760,0.5658), (0.5674,0.4256)；The color of the light of first peak wavelength is sat It is designated as: (0.1552,0.0236)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme one Coordinate is x=0.3450, y=0.3576, wherein in CIE1931 color crystalline substance figure (as shown in Figure 2).Wherein, the function of synthetic spectrum Rate distribution is as shown in figure 3, wherein show the power distribution curve and natural spectrum to be matched of synthetic spectrum in Fig. 3 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the distribution of synthetic spectrum and natural spectrum to be matched Curve is close, in addition, the colorimetric properties (referring to shown in Fig. 4) of synthetic spectrum include R1=91, R2=98, R3=92, R4=80, R5=88, R6=95, R7=85, R8=78, R9=46, R10=97, R11=81, R12=67, R13=94, R14=96, R15=87 determines that CRI is 85；The color tolerance 1.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.84；Circadian rhythm stimulation Parameter (CS, circadian stimulus also make circadian rhythm stimulate) is 0.55；(synthetic spectrum deviates blackbody curve to Duv Distance) it is 0.0031.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 8 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					90.3	96.6	85.4	91.4	99.6

Table 8

Scheme two: the colour temperature of the target nature spectrum is 5700K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 0.04:8.37: 61.07:29.88。

Wherein for two: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1322,0.0783), (0.3760,0.5658), (0.5674,0.4256)；The color of the light of first peak wavelength is sat It is designated as: (0.1552,0.0236)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme two Coordinate is x=0.3285, y=0.3417, wherein in CIE1931 color crystalline substance figure (as shown in Figure 5).Wherein, the function of synthetic spectrum Rate distribution is as shown in fig. 6, wherein show the power distribution curve and natural spectrum to be matched of synthetic spectrum in Fig. 6 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the distribution of synthetic spectrum and natural spectrum to be matched Curve is close, in addition, the colorimetric properties (referring to shown in Fig. 7) of synthetic spectrum include R1=93, R2=97, R3=92, R4=83, R5=90, R6=94, R7=86, R8=81, R9=53, R10=98, R11=84, R12=74, R13=97, R14=96, R15=90 determines that CRI is 87；The color tolerance 0.4 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.92；CS is 0.57；Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0021.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 9 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					93.4	98.7	87.8	96.1	99.8

Table 9

Using aforesaid way production the natural radiant for meeting predetermined condition spectral chromaticity coordinate be (0.3267, 0.3356), wherein in CIE1931 color crystalline substance figure (as shown in Figure 8).Wherein, the power distribution such as Fig. 9 of the spectrum of natural radiant It is shown, the power distribution curve of the spectrum of nature radiant and the power of natural spectrum to be matched are wherein shown in Fig. 9 Distribution curve, in which it can be seen that in the section wavelength 380-780nm, the spectrum of natural radiant and natural spectrum to be matched Distribution curve is close, in addition, the colorimetric properties (referring to Fig.1 shown in 0) of the spectrum of natural radiant include R1=95, R2=92, R3=91, R4=92, R5=94, R6=90, R7=91, R8=93, R9=92, R10=85, R11=94, R12=86, R13 =94, R14=95, R15=95 determine that CRI is 92；The color tolerance 3.4 of the spectrum of natural radiant；SCF (spectrum similarity γ_xy) it is 0.93；CS is 0.58；Duv (distance of synthetic spectrum deviation blackbody curve) is -0.0002.

Spectrum then based on above-mentioned parameter 102 pairs of natural radiants through the above steps gives a mark to obtain such as the following table 10 institute Show.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					93.7	89.8	92.4	96.2	94.6

Table 10

In scheme two, it can be seen that the P of synthetic spectrum_Overall=93.4, the satisfaction based on the production of above-mentioned preset condition The P of the spectrum of the natural radiant of predetermined condition_Overall=93.7, meet the requirement of nature spectrum.

Scheme three: the colour temperature of the nature spectrum is 6500K；The light of first peak wavelength is by the first fluorescent powder, second The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak value wave after fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of long light and the 4th peak wavelength meets following predetermined condition, 0.1:8.21: 68.67:22.94。

Wherein for three: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1322,0.0783), (0.3760,0.5658), (0.5674,0.4256)；The color of the light of first peak wavelength is sat It is designated as: (0.1552,0.0236)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme three Coordinate is x=0.3141, y=0.3392, wherein in CIE1931 color crystalline substance figure (as shown in figure 11).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 12, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 12 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to Fig.1 shown in 3) of synthetic spectrum include R1=88, R2=96, R3=95, R4= 81, R5=87, R6=93, R7=89, R8=78, R9=35, R10=89, R11=81, R12=74, R13=91, R14= 97, R15=84 determines that CRI is 84；The color tolerance 1.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.95；CS is 0.58； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0077.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 11 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					92.2	96.6	84.4	97.4	98.4

Table 11

Using aforesaid way production the natural radiant for meeting predetermined condition spectral chromaticity coordinate be (0.3167, 0.3429), wherein in CIE1931 color crystalline substance figure (as shown in figure 14).Wherein, the power distribution of the spectrum of natural radiant is as schemed Shown in 15, the power distribution curve and natural spectrum to be matched of the spectrum of nature radiant are wherein shown in Figure 15 Power distribution curve, in which it can be seen that in the section wavelength M-N, point of the spectrum of natural radiant and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to Fig.1 shown in 6) of the spectrum of natural radiant include R1=95, R2=98, R3 =95, R4=89, R5=94, R6=99, R7=92, R8=88, R9=67, R10=96, R11=90, R12=88, R13= 96, R14=97, R15=92 determine that CRI is 92；The color tolerance 3.1 of the spectrum of natural radiant；SCF (spectrum similarity γ_xy) It is 0.95；CS is 0.58；Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0082.

Spectrum then based on above-mentioned parameter 102 pairs of natural radiants through the above steps gives a mark to obtain such as the following table 12 institute Show.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					94.1	90.6	92.2	97.6	92.2

Table 12

In scheme three, it can be seen that the P of synthetic spectrum_Overall=92.2, the satisfaction based on the production of above-mentioned preset condition The P of the spectrum of the natural radiant of predetermined condition_Overall=94.1, meet the requirement of nature spectrum.

The typical natural spectrum of the natural spectrum LED reference that the present invention develops, luminescent color reference lighting source color standard, Be blue chip for LED chip, it is total develop 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, 6500K colour temperature nature spectrum, matching scheme and result are as follows:

Scheme four: the colour temperature of the target nature spectrum is 2700K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 0.78:0: 74.46:26.14。

Wherein for four: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme four Coordinate is x=0.4535, y=0.4114, wherein in CIE1931 color crystalline substance figure (as shown in figure 17).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 18, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 18 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to Fig.1 shown in 9) of synthetic spectrum include R1=86, R2=98, R3=87, R4= 80, R5=88, R6=96, R7=87, R8=76, R9=50, R10=97, R11=74, R12=95, R13=88, R14= 91, R15=85 determines that CRI is 85；The color tolerance 3.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.69；CS is 0.52； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0009.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 13 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					85.3	90.4	85.7	82.9	86.9

Table 13

Using aforesaid way production the natural radiant for meeting predetermined condition spectral chromaticity coordinate be (0.4576, 0.4075), wherein in CIE1931 color crystalline substance figure (as shown in figure 20).Wherein, the power distribution of the spectrum of natural radiant is as schemed Shown in 21, the power distribution curve and natural spectrum to be matched of the spectrum of nature radiant are wherein shown in Figure 21 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the spectrum of natural radiant and natural light to be matched The distribution curve of spectrum is close, in addition, the colorimetric properties (referring to shown in Figure 22) of the spectrum of natural radiant include R1=97, R2= 99, R3=95, R4=96, R5=97, R6=98, R7=98, R8=94, R9=89, R10=99, R11=94, R12=89, R13=97, R14=96, R15=96 determine that CRI is 96；The color tolerance 1.3 of the spectrum of natural radiant；(spectrum is similar by SCF Spend γ_xy) it is 0.69；CS is 0.52；Duv (distance of synthetic spectrum deviation blackbody curve) is -0.0010.

Spectrum then based on above-mentioned parameter 102 pairs of natural radiants through the above steps gives a mark to obtain such as the following table 14 institute Show.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					91.1	96.3	96.1	83.3	96.7

Table 14

In scheme four, it can be seen that the P of synthetic spectrum_Overall=85.3, the satisfaction based on the production of above-mentioned preset condition The P of the spectrum of the natural radiant of predetermined condition_Overall=91.1, meet the requirement of nature spectrum.

Scheme five: the colour temperature of the target nature spectrum is 3000K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 0.97:0.32: 75.87:22.81。

Wherein for five: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme five Coordinate is x=0.4325, y=0.4043, wherein in CIE1931 color crystalline substance figure (as shown in figure 23).Wherein, the function of synthetic spectrum Rate is distributed the power distribution curve and natural spectrum to be matched for wherein showing synthetic spectrum in Fig. 4 as shown in figure 24 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the distribution of synthetic spectrum and natural spectrum to be matched Curve is close, in addition, the colorimetric properties (referring to shown in Figure 25) of synthetic spectrum include R1=89, R2=98, R3=85, R4= 82, R5=90, R6=97, R7=86, R8=76, R9=50, R10=97, R11=77, R12=90, R13=91, R14= 90, R15=87 determines that CRI is 86；The color tolerance 1.3 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.69；CS is 0.53； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0007.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 15 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					87.1	96.4	86.2	83.3	94.7

Table 15

Scheme six: the colour temperature of the target nature spectrum is 3500K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 1.27:0: 80.16:19。

Wherein for six: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme six Coordinate is x=0.4069, y=0.3939, wherein in CIE1931 color crystalline substance figure (as shown in figure 26).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 27, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 27 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to shown in Figure 28) of synthetic spectrum include R1=93, R2=94, R3=81, R4= 83, R5=94, R6=91, R7=84, R8=78, R9=55, R10=86, R11=81, R12=76, R13=97, R14= 88, R15=89 determines that CRI is 85；The color tolerance 0.9 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.70；CS is 0.55； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0010.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 16 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					87.1	97.4	85.2	83.9	95.6

Table 16

Scheme seven: the colour temperature of the target nature spectrum is 4000K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 1.46:5.71: 74.87:17.95。

Wherein for seven: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme seven Coordinate is x=0.3804, y=0.3805, wherein in CIE1931 color crystalline substance figure (as shown in figure 29).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 30, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 30 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to shown in Figure 31) of synthetic spectrum include R1=87, R2=97, R3=90, R4= 82, R5=88, R6=97, R7=87, R8=74, R9=35, R10=94, R11=77, R12=94, R13=90, R14= 94, R15=84 determines that CRI is 85；The color tolerance 1.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.82；CS is 0.48； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0018.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 17 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					89.7	96.5	85.2	90.7	96.1

Table 17

Using aforesaid way production the natural radiant for meeting predetermined condition spectral chromaticity coordinate be (0.3724, 0.3675), wherein in CIE1931 color crystalline substance figure (as shown in figure 32).Wherein, the power distribution of the spectrum of natural radiant is as schemed Shown in 33, the power distribution curve and natural spectrum to be matched of the spectrum of nature radiant are wherein shown in Figure 33 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the spectrum of natural radiant and natural light to be matched The distribution curve of spectrum is close, in addition, the colorimetric properties (referring to shown in Figure 34) of the spectrum of natural radiant include R1=98, R2= 99, R3=96, R4=96, R5=99, R6=97, R7=98, R8=98, R9=93, R10=97, R11=94, R12=81, R13=98, R14=97, R15=97 determine that CRI is 96；The color tolerance 4.9 of the spectrum of natural radiant；(spectrum is similar by SCF Spend γ_xy) it is 0.77；CS is 0.50；Duv (distance of synthetic spectrum deviation blackbody curve) is -0.0020.

Spectrum then based on above-mentioned parameter 102 pairs of natural radiants through the above steps gives a mark to obtain such as the following table 18 institute Show.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					90.5	84.8	96.4	87.6	84.3

Table 18

In scheme seven, it can be seen that the P of synthetic spectrum_Overall=89.7, the satisfaction based on the production of above-mentioned preset condition The P of the spectrum of the natural radiant of predetermined condition_Overall=90.5, meet the requirement of nature spectrum.

Scheme eight: the colour temperature of the target nature spectrum is 4500K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 1.73:7.16: 74.77:16.3。

Wherein for eight: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme eight Coordinate is x=0.3617, y=0.3675, wherein in CIE1931 color crystalline substance figure (as shown in figure 35).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 36, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 36 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to shown in Figure 37) of synthetic spectrum include R1=88, R2=97, R3=91, R4= 83, R5=89, R6=97, R7=88, R8=75, R9=33, R10=93, R11=78, R12=92, R13=90, R14= 95, R15=84 determines that CRI is 85；The color tolerance 0.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.84；CS is 0.52； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0016.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 19 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					90.7	99.4	85.3	91.5	99.5

Table 19

Scheme nine: the colour temperature of the target nature spectrum is 5000K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, 1.99:9.09: 73.94:15。

Wherein for nine: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme nine Coordinate is x=0.3445, y=0.3551, wherein in CIE1931 color crystalline substance figure (as shown in figure 38).Wherein, the function of synthetic spectrum Rate distribution as shown in figure 39, wherein shows the power distribution curve and natural spectrum to be matched of synthetic spectrum in Figure 39 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, point of synthetic spectrum and natural spectrum to be matched Cloth curve is close, in addition, the colorimetric properties (referring to shown in Figure 40) of synthetic spectrum include R1=88, R2=96, R3=93, R4= 84, R5=89, R6=96, R7=89, R8=77, R9=32, R10=90, R11=79, R12=91, R13=90, R14= 96, R15=85 determines that CRI is 85；The color tolerance 0.1 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.86；CS is 0.55； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0020.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 20 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					91.4	99.7	85.6	92.7	99.8

Table 20

Scheme ten: the colour temperature of the target nature spectrum is 5700K；The light of first peak wavelength by the first fluorescent powder, The intensity of residual ray, the intensity of the light of the second peak wavelength, third peak after second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of value wavelength and the 4th peak wavelength meets following predetermined condition, and 2.54: 12.06:67.3:18.07。

Wherein for ten: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates according to It is secondary are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength is sat It is designated as: (0.1579,0.0204)；The color of the synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme ten Coordinate is x=0.3289, y=0.3429, wherein in CIE1931 color crystalline substance figure (as shown in figure 41).Wherein, the function of synthetic spectrum Rate is distributed the power distribution curve and natural spectrum to be matched for wherein showing synthetic spectrum in Fig. 2 as shown in figure 42 Power distribution curve, in which it can be seen that in the section wavelength 380-780nm, the distribution of synthetic spectrum and natural spectrum to be matched Curve is close, in addition, the colorimetric properties (referring to shown in Figure 43) of synthetic spectrum include R1=91, R2=94, R3=94, R4= 89, R5=91, R6=90, R7=97, R8=97, R9=85, R10=83, R11=82, R12=89, R13=91, R14= 95, R15=95 determines that CRI is 91；The color tolerance 0.2 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.90；CS is 0.57； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0025.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 21 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					94.3	99.5	91.3	94.6	99.2

Table 21

Scheme 11: the colour temperature of the target nature spectrum is 6500K；The light of first peak wavelength is by the first fluorescence The intensity of residual ray, the intensity of the light of the second peak wavelength, third after powder, the second fluorescent powder and third fluorescent powder absorb The intensity ratio of the light of the intensity of the light of peak wavelength and the 4th peak wavelength meets following predetermined condition, and 0.027: 14.84:68.86:16.28。

Wherein for the 11: the second peak wavelength of scheme, third peak wavelength, the 4th peak wavelength light chromaticity coordinates Successively are as follows: (0.1552,0.0236), (0.3884,0.5648), (0.6793,0.3205)；The color of the light of first peak wavelength Coordinate are as follows: (0.1520,0.0266)；The synthetic spectrum of Spectral matching generation is carried out with the predetermined condition shown in above scheme 11 Chromaticity coordinates be x=0.3130, y=0.3370, wherein in CIE1931 color crystalline substance figure (as shown in figure 44).Wherein, synthetic spectrum Power be distributed as shown in 45, wherein shown in Figure 45 synthetic spectrum power distribution curve and natural light to be matched The power distribution curve of spectrum, in which it can be seen that in the section wavelength 380-780nm, synthetic spectrum and natural spectrum to be matched Distribution curve is close, in addition, the colorimetric properties (referring to shown in Figure 46) of synthetic spectrum include R1=93, R2=93, R3=90, R4 =92, R5=93, R6=90, R7=95, R8=95, R9=88, R10=81, R11=85, R12=91, R13=92, R14= 93, R15=97 determines that CRI is 91；The color tolerance 0.0 of synthetic spectrum；SCF (spectrum similarity γ_xy) it is 0.92；CS is 0.58； Duv (distance of synthetic spectrum deviation blackbody curve) is 0.0071.

Then based on above-mentioned parameter, 102 pairs of synthetic spectrums give a mark to obtain as shown in table 22 below through the above steps.

P_Overall	P_SDCM	P_CRI	P_S	P_CCT
					90.9	100	91.8	95.7	98.6

Table 22

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, such as In above scheme certainly only for offer 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, 6500K colour temperature The explanation that the light source of right spectrum carries out can also make the natural spectrum for providing other colour temperatures by above-mentioned scheme certainly Light source, anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or replace It changes, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection of the claim Subject to range.

Claims

1. a kind of light source characterized by comprising

LED chip, the LED chip are used to emit the light of the first peak wavelength；

Three kinds of fluorescent powders, wherein the first fluorescent powder when being excited by the light of first peak wavelength, generates the second peak value wave Long light；

Second fluorescent powder generates the light of third peak wavelength when being excited by the light of first peak wavelength；

Third fluorescent powder generates the light of the 4th peak wavelength when being excited by the light of first peak wavelength；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets predetermined condition so that the light of the residual ray, the light of the second peak wavelength, third peak wavelength with And the 4th the light light mixing of peak wavelength formed and meet the light of nature spectrum；

Wherein, the predetermined condition, by the residual ray, the light of the second peak wavelength, the light of third peak wavelength, The synthetic spectrum that the light of 4th peak wavelength is mixed to form carries out evaluation generation；To at least four of the synthetic spectrum One or more in lighting parameter are evaluated, and the corresponding scoring of the lighting parameter are generated, wherein the lighting parameter is extremely It less include colour temperature accuracy, colour rendering, color tolerance and spectrum similarity；According to every lighting parameter pair of the synthetic spectrum The scoring answered matches with target nature spectrum, when the corresponding scoring of every lighting parameter of the synthetic spectrum meets target certainly When the requirement of right spectrum, the predetermined condition is determined.

2. light source according to claim 1, which is characterized in that

First peak wavelength belongs to section [412.5nm-417.5nm]；

Second peak wavelength is 460nm；

Third peak wavelength is 540nm；

4th peak wavelength is 640nm.

3. light source according to claim 1, which is characterized in that

The colour temperature of the target nature spectrum is 5000K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.01:4.73:38.1:21.07.

4. light source according to claim 1, which is characterized in that

The colour temperature of the nature spectrum is 5700K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.04:8.37:61.07:29.88.

5. light source according to claim 1, which is characterized in that

The colour temperature of the nature spectrum is 6500K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.1:8.21:68.67:22.94.

6. according to the described in any item light sources of claim 2-5, which is characterized in that

First fluorescent powder is SSLRAD460, and the second fluorescent powder is NVU540, and third fluorescent powder is NUV640.

7. light source according to claim 1, which is characterized in that

First peak wavelength belongs to section [450nm-452.5nm]；

Second peak wavelength is 490nm；

Third peak wavelength is 535nm；

4th peak wavelength is 670nm.

8. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 2700K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.78:0:74.46:26.14.

9. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 3000K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.97:0.32:75.87:22.81.

10. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 3500K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 1.27:0:80.16:19.

11. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 4000K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 1.46:5.71:74.87:17.95.

12. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 4500K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 1.73:7.16:74.77:16.3.

13. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 5000K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 1.99:9.09:73.94:15.

14. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 5700K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 2.54:12.06:67.3:18.07.

15. light source according to claim 7, which is characterized in that

The colour temperature of the target nature spectrum is 6500K；

Residual ray is strong after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder The light of degree, the intensity of the light of the second peak wavelength, the intensity of the light of third peak wavelength and the 4th peak wavelength Intensity ratio meets following predetermined condition, 0.027:14.84:68.86:16.28.

16. according to the described in any item light sources of claim 8-13, which is characterized in that

First fluorescent powder is YGNO490H, and the second fluorescent powder is YGG535E, and third fluorescent powder is YGR670L.

17. light source according to claim 14 or 15, which is characterized in that

First fluorescent powder is YGNO490H, and the second fluorescent powder is YGG535E, and third fluorescent powder is YGR630L.

18. a kind of generation method based on such as natural spectrum of the described in any item light sources of claim 1-16, which is characterized in that

Residue after the light of first peak wavelength is absorbed by the first fluorescent powder, the second fluorescent powder and third fluorescent powder Light, the light of the second peak wavelength, the light of third peak wavelength, the light of the 4th peak wavelength carry out being mixed to form synthesis Spectrum；

One or more at least four lighting parameters of the synthetic spectrum are evaluated, the lighting parameter pair is generated The scoring answered, wherein the lighting parameter includes at least colour temperature accuracy, colour rendering, color tolerance and spectrum similarity；

Matched according to the corresponding scoring of every lighting parameter of the synthetic spectrum with target nature spectrum, when the synthesis light When the corresponding scoring of every lighting parameter of spectrum meets the requirement of target nature spectrum, the predetermined condition is determined, in order to institute It states light source and the target nature spectrum is generated according to the predetermined condition.