CN102539406A - System for detecting light color and spectrum of LED fluorescent material and method thereof - Google Patents
System for detecting light color and spectrum of LED fluorescent material and method thereof Download PDFInfo
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- CN102539406A CN102539406A CN2012100146095A CN201210014609A CN102539406A CN 102539406 A CN102539406 A CN 102539406A CN 2012100146095 A CN2012100146095 A CN 2012100146095A CN 201210014609 A CN201210014609 A CN 201210014609A CN 102539406 A CN102539406 A CN 102539406A
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Abstract
The invention relates to a system for detecting light color and spectrum of a light-emitting diode (LED) fluorescent material and a method of the system, and belongs to optical instruments. By performing mutual calculation or synthesis (analysis) on various spectra through an analysis device which comprises a spectrum loading unit, a spectrum synthesis unit, a spectrum calculation unit, a spectrum storage unit and a chromaticity coordinates generation unit, the conversion efficiency, light color characteristic quantitative spectrum and light color of the LED fluorescent material can be detected in a direct and nondestructive manner without changing any type of the LED fluorescence test sample. Besides, poor-quality LED fluorescent materials are blocked from entering the production, to reduce the reject rate of light color products; and the white-light LED optical and spectral structures are fully simulated, and the white-light LED spectrum of the test sample is entirely separated to form an induced blue light spectrum and a fluorescence spectrum, which are independent from each other.
Description
Technical field
The present invention is for providing a kind of LED fluorescent material photochromic and spectral detection system; Especially refer to a kind of direct test non-destructive and do not change any LED fluorometric investigation sample kenel, quantitative spectrum of LED fluorescent material conversion efficiency and colorimetric characteristics and photochromic detection mode, and sampling is fast; Do not consume the manpower of unnecessary material and making sample; And, effectively filter bad LED fluorescent material and get into production, photochromic and spectral detection system and method thereof with the LED fluorescent material that reduces bad photochromic product output.
Background technology
Previous LED industry detect the LED fluorescent material need be luminous under near the actual product structure, just can do further analysis.Therefore must be identical in the measuring optical path of sample (Optical Path) with the light emitting path of white light LEDs, and the light spectrum that brings out of its fluorescence also must be approximate with the blue chip spectrum of white light LEDs.Again with traditional fluorescence spectrum system; The above optical environment of can't coincideing requires; Main cause has two: the first, the chemical fluorescence spectrum of traditional analysis system, the spectral wavelength that mainly can bring out at the detecting fluorescent material and brought out the fluorescence spectrum wavelength signal that the back produces.The fluorescent spectroscopy of chemistry:, mainly be that inequality with the purpose of white light LEDs, the optical path of this its system is also different to the spectral analysis of popularity fluorescent materials; The fluorescence spectrum that chemical analysis is used must separate with the fluorescence spectrum signal bringing out the spectrum signal fully, avoids interference.Therefore the optical path design that will adopt 90 degree to bring out lets the fluorescence spectrum signal become an angle of 90 degrees with the signal that brings out light, and the direction of advancing is separately advanced, and only lets the fluorescence signal get into its spectrum signal output of spectrometer processing; The second, the fluorescence spectrum system is used in the traditional chemical analysis; Major function is to be to test fluorescent material and the relation of bringing out optical wavelength; Therefore need bring out the light source that fluorescence produces as it with the high pressure xenon gas lamp of the wide wavelength of inclined to one side ultraviolet; And must it be brought out wide the narrowing down of its light wave of light source bring out through the chromatic dispersion beam split.So traditional chemical fluorescence spectrum system, its spectrum condition and white light LEDs fluorescence condition of bringing out of bringing out light source has very big difference.
Moreover the fluorescent samples Direct Test of can't drawing materials was puzzlement maximum in the white light LEDs quality inspection always in the past, mainly was that fluorescent material can't detect in direct sample.In the process that detects; Need other material of collocation: add the qualitative interference of optics that fluorescent material that chip (Diode Chip) so measures has received other material like silica gel (Silicon) or resin (Epoxy); For the sample of making; Can't clearly judge in fact: simple fluorescent material, the factor disturbed because of other material of itself measured photochromic data not only, data become nonsensical fully beyond; Also, also cause manpower and materials and temporal waste because of the mode in the sample place can cause material and time too loaded down with trivial details.
Person again, in the process that sampling is tested, other material of must arranging in pairs or groups; As stated, have material and disturb qualitatively at optics, maximum in addition interference is the interference of optics on quantitatively; The factor that causes this interference is nothing more than being this process the inside in the mixing adjustment of material; Have each prong material and mix the even puzzlement of density unevenness mutually,, and be difficult to guarantee that its concentration can be consistent on single sampling because quite difficulty is just gone up in its concentration that provides control of material separately; Even fluorescent material is the solid sample that belongs to the inorganic crystal powder, and can not solve homogeneously in the moulding materials such as silica gel and resin.General its powder just has the different distribution of size, and the diameter of particle of 5～20um is arranged approximately, in colloid, presents asymmetric suspension and distributes; Must use part external force constantly evenly stirs; So very likely air is admixed the colloid the inside and form bubble,, but have air is imported the risk that produces bubble in the colloid though this sample loading mode makes powder can form uniform cloth youth motion state; Same; This mode presents distribution because of fluorescent powder, and it is brought out also by blue light can be effectively and uniformly and the fluorescent material effect, produces the stable fluorescence signal.
In addition, in the process of desiring to test, must the LED fluorescent material be mixed (promptly being called destruction) with other material, just can test, and after using, then can't utilize once more, mean and to abandon very not environmental protection.
Summary of the invention
Fundamental purpose of the present invention is that the measuring optical path is consistent with the white light LEDs optical path; Make things convenient for the simulation of actual light chromatic effect; And be a kind of non-destructive detection mode; The character unanimity is constant before and after guaranteeing the specimen material test, more brings out fluorescent material with the solid state LED light source and produces fluorescence, so that simulation and the akin white light of white light LEDs, blue light and fluorescence spectrum.
Secondary objective of the present invention is that LED fluorescent material 180 degree is brought out by light (reflect or penetrate sample) vertically; With the very akin optical path of white light LEDs; And, can guarantee that the LED fluorescent material has the displacement space of big convenience with external style article groove test.
Still a further object of the present invention is to be able to the ratio of computing bright dipping and look; And be able to judge this size that has of blue chip, and, can select the LED fluorescent material in making the finished product experiment when making sample; Can find out the difference of concentration, the LED fluorescent material what are judged.
For reaching above-mentioned advantage; Primary structure of the present invention comprises a pick-up unit; Detect the photochromic and spectrum of this LED fluorescent material by the cooperation of an initial light source and an optical integration ball; And carry out spectral analysis through an analytical equipment, and to operate and mainly analyze through an analysis module, its analysis module comprises a spectrum loading unit, a spectrum synthesis unit, a spectrum computing unit, a spectrum storage element and a colourity coordinate generation unit; Bring out blue-light source and also produce one during through the optical integration ball and initially bring out blue spectrum when initial light source (solid state LED light source) irradiates one; And vertically receive photo-induced LED fluorescent material with 180 degree; Form and the white light LEDs same paths; And then produce one and be absorbed blue spectrum by what the LED fluorescent material absorbed; Then initially bring out blue spectrum and be absorbed blue spectrum and then be shown on the spectrum display unit by the spectrum loading unit; To be absorbed simultaneously and bring out the fluorescence spectrum that blue spectrum produces and be shown on the spectrum display unit; To be absorbed through the spectrum synthesis unit this moment and bring out blue spectrum and fluorescence spectrum synthesizes to produce a white-light spectrum and to be shown on the spectrum display unit; Undertaken by the spectrum computing unit promptly then that spectrum adds, subtracts, the computing of multiplication and division; At first will be absorbed and bring out blue spectrum and fluorescence spectrum carries out the addition compose operation to produce a synthesize white light spectrum and to be shown on the spectrum display unit; To initially bring out blue spectrum again and be absorbed and bring out blue spectrum and carry out additive operation, again synthesize white light spectrum carried out the computing of spectrum multiplication multiplying power to produce a reduction magnification synthesize white light spectrum and to be shown on the spectrum display unit, again fluorescence spectrum removed last fluorescent absorption amount spectrum to produce the emission conversion efficiency value of this LED fluorescent material to produce a fluorescent absorption amount spectrum and to be shown on the spectrum display unit; After this synthesize white light spectrum, fluorescent absorption amount spectrum, reduction magnification synthesize white light spectrum and emission conversion efficiency value are stored in the spectrum storage element; Promptly accomplish preliminary detection by this, and after accomplishing above-mentioned steps, can will initially bring out blue spectrum, fluorescence spectrum, synthesize white light spectrum etc. by a colourity coordinate generation unit and after the conversion of color function, produce respectively and bring out blue spectrum chromaticity coordinate, fluorescence spectrum chromaticity coordinate and synthesize white light spectral chromaticity coordinates; And it is shown on the screen, and then produce complementary color toe-in composition or color area structural drawing.
In addition, the spectrum computing unit more is able to further calculate the ratio of its brightness and color, and the brightness of led chip and the multiplying power of fluorescence concentration, the user more can be known grasp each relevant reference parameter of manufacturing LED.
The present invention specifically comprises:
Photochromic and the spectral detection system of a kind of LED fluorescent material, this detection system mainly includes:
One pick-up unit detects the photochromic and spectrum of this LED fluorescent material by the cooperation of an initial light supply apparatus and an optical integration ball;
One analytical equipment links by an analysis module and this detection of device information, and this analysis module comprises:
One spectrum loading unit supplies loading various by absorption of LED fluorescent material or unabsorbed spectrum archives, and shows that spectral waveform is on a spectrum display unit;
One spectrum synthesis unit is used for the various spectral waveform that are shown on the spectrum display unit are synthesized and are shown in this spectrum display unit; One spectrum computing unit is used for the various spectrum that are shown on the spectrum display unit are carried out the mathematical expression compose operation;
One spectrum storage element will store through the spectrum of spectrum computing unit compose operation;
One colourity coordinate generation unit is shown in above-mentioned various spectrum on the one colourity coordinate display unit with the coordinate mode.
Wherein this spectrum be blue spectrum, fluorescence spectrum or white-light spectrum one of them;
The light source that wherein this initial light supply apparatus distributed is a blue-light source;
Wherein this mathematical expression be addition, subtraction, multiplication or division one of them;
Wherein this LED fluorescent material is a yellow fluorescent material;
Wherein this LED fluorescent material is accommodated by a box body, and this box surface is provided with the quartz glass of a high penetration, is main by a high reflectance diffusive material then at.
Photochromic and the spectral method of detection of a kind of LED fluorescent material, its detection method is: (a) go out to bring out blue-light source and produce one through an optical integration ball initially to bring out blue spectrum through an initial light source irradiation; (b) blue-light source that brings out through the optical integration ball shines on a LED fluorescent material, again in the 180 degree reflected back optics integrating spheres, is absorbed and brings out blue spectrum and produce one; (c) it initially brings out blue spectrum and is absorbed blue spectrum and is received by an analytical equipment, and analyzes through the analysis module of building in; (d) being contained in spectrum loading unit in the analysis module by one will initially bring out blue spectrum and be absorbed and bring out blue spectrum and be shown on the spectrum display unit; (e) will be absorbed through the spectrum loading unit again and bring out the fluorescence spectrum that blue spectrum produces and be shown on the spectrum display unit; (f) will be absorbed through the spectrum synthesis unit and bring out blue spectrum and fluorescence spectrum synthesizes to produce a white-light spectrum and to be shown on the spectrum display unit; (g) will be absorbed through a spectrum computing unit and bring out blue spectrum and fluorescence spectrum carries out the addition compose operation to produce a synthesize white light spectrum and to be shown on the spectrum display unit; (h) will initially bring out blue spectrum through the spectrum computing unit again and be absorbed and bring out blue spectrum and carry out additive operation to produce a fluorescent absorption amount spectrum and to be shown on the spectrum display unit; (i) through the spectrum computing unit synthesize white light spectrum is carried out the computing of spectrum multiplication multiplying power to produce a reduction magnification synthesize white light spectrum and to be shown on the spectrum display unit again; (j) through the spectrum computing unit fluorescence spectrum is removed last fluorescent absorption amount spectrum to produce the emission conversion efficiency value of this LED fluorescent material again; (k) synthesize white light spectrum, fluorescent absorption amount spectrum, reduction magnification synthesize white light spectrum and emission conversion efficiency value are stored in the spectrum storage element.
Wherein detection method more comprises: (l) will initially bring out blue spectrum generation one after the conversion of color function through a colourity coordinate generation unit and bring out the blue spectrum chromaticity coordinate; (m) through the chromaticity coordinate generation unit fluorescence spectrum is produced a fluorescence spectrum chromaticity coordinate after the conversion of color function again; (n) through the chromaticity coordinate generation unit synthesize white light spectrum is produced a synthesize white light spectral chromaticity coordinates after the conversion of color function again; (o) will bring out blue spectrum chromaticity coordinate, fluorescence spectrum chromaticity coordinate and synthesize white light spectral chromaticity coordinates again loads to produce a complementary color toe-in composition or color area structural drawing jointly.
Wherein this initial light source is a blue-light source;
Wherein this LED fluorescent material is a yellow fluorescent material.
By above-mentioned technology, can need be luminous under near the actual product structure to the existing existing LED fluorescent material of LED fluorescent material detection technique, just can do the analysis in a step; And fluorescent material can't detect in direct sample; Therefore the fluorescent material of measuring also receives the qualitative interference of optics of other material, for the sample of making, can't clearly judge in fact; Data become under the factor that measured in addition photochromic data are disturbed because of other material complete nonsensical beyond; Also, also cause manpower and materials and temporal waste because of the mode in the sample place can cause material and time too loaded down with trivial details, more prior; Prior art must be destroyed LED fluorescent material (promptly mixing with other material) in advance and just can test; And not environmental protection, use later promptly can not recycling problem points break through, reach the practical improvement of the present invention such as above-mentioned advantage.
The invention has the advantages that:
One, the measuring optical path is consistent with the white light LEDs optical path, makes things convenient for the simulation of actual light chromatic effect.
Two, the different places with prior art of the present invention are to adopt the non-destructive detection mode, guarantee that specimen material test front and back character unanimity is constant.
Three, bring out fluorescent material with the solid state LED light source and produce fluorescence, so that simulation and the akin white light of white light LEDs, blue light and fluorescence spectrum.
Four, sample 180 degree is brought out by light (reflect or penetrate sample) vertically, with the very akin optical path of white light LEDs.And with external style article groove test; Can guarantee that sample has big convenience sample displacement space.
Five, white-light spectrum is decomposed (Curve Fittng) so that white light is done the color structure decomposition and white light is mixed colours emulation in the online variation of its color structure complementary color.
Six, can obtain quantum (photon) conversion efficiency, radiation (spectrum) conversion efficiency and vision (lumen or other vision light unit) conversion efficiency.
Seven, can white light, blue light and fluorescence spectrum quantification digital storage be set up the digital spectrum database.
Eight, quantitatively spectrum computing: can calculate absolute absorption amount and relative absorptivity that LED fluorescent material correspondence is brought out blue light.
Nine, the arithmetical operation of absolute quantitation spectrum is provided, as the photochromic simulated effect computing of the vision of quantitative spectra database.
Ten, guarantee to bring out the light source light power stability, consistent to guarantee the fluorescence spectrum power stability.
11, use with the blue-light LED chip identical spectra, directly bring out the fluorescence spectrum of the fluorescent material generation structure identical with actual white light LEDs.
12, be the basis with the quantitative computing of spectrum, can with several different fluorescent materials under the spectra database operational pattern, directly on analysis software, mix the specific photochromic spectrum of spectral simulation separately.
13, difference is brought out the chip blue spectrum and the LED fluorescent material spectrum of wavelength, also can set up the usefulness of spectra database as the photochromic adjustment simulation of LED.
14, utilize the fluorescence spectrum parameter and bring out photochromic that blue spectrum matches well each other, can judge under the condition of not wasting any material fully that its LED fluorescent material is fit to the colorimetric characteristics of performance.
15, direct sample fluorescent samples test loaded tool: need possess the sample rest area of high-penetrability and high abrasion quartz glass and fixed amount, and cooperate the measuring optical path, the sample carrier surface needs to do the white surface of diffuse reflection.
Description of drawings
Fig. 1 is the block schematic diagram one of preferred embodiment of the present invention.
Fig. 2 is the block schematic diagram two of preferred embodiment of the present invention.
Fig. 3 is the block flow diagram of preferred embodiment of the present invention.
Fig. 4 is the source path synoptic diagram one of preferred embodiment of the present invention.
Fig. 5 is the source path synoptic diagram two of preferred embodiment of the present invention.
Fig. 6 is system's picture view one of preferred embodiment of the present invention.
Fig. 7 is system's picture view two of preferred embodiment of the present invention.
Fig. 8 is system's picture view three of preferred embodiment of the present invention.
Fig. 9 is system's picture view four of preferred embodiment of the present invention.
Figure 10 is system's picture view five of preferred embodiment of the present invention.
Figure 11 is system's picture view six of preferred embodiment of the present invention.
Figure 12 is system's picture view seven of preferred embodiment of the present invention.
Figure 13 is system's picture view eight of preferred embodiment of the present invention.
Figure 14 is the chromaticity coordinate figure one of preferred embodiment of the present invention.
Figure 15 is the chromaticity coordinate figure two of preferred embodiment of the present invention.
Figure 16 is the chromaticity coordinate figure three of preferred embodiment of the present invention.
Figure 17 is the chromaticity coordinate figure four of preferred embodiment of the present invention.
Figure 18 is the chromaticity coordinate figure five of preferred embodiment of the present invention.
Figure 19 is the synoptic diagram of CIE tristimulus values function of the present invention.
Figure 20 is the synoptic diagram of the present invention's 1931 chromaticity coordinates.
Figure 21 is the oscillogram one of blue spectrum of the present invention and fluorescence spectrum.
Figure 22 is the oscillogram two of blue spectrum of the present invention and fluorescence spectrum.
Figure 23 is the oscillogram three of blue spectrum of the present invention and fluorescence spectrum.
Embodiment
Shown in accompanying drawing 1 and accompanying drawing 2; Block schematic diagram one and two for preferred embodiment of the present invention; By knowing and find out that detection system of the present invention mainly comprises among the figure: a pick-up unit 1, by one supply to launch initial light supply apparatus 2 and an optical integration ball 3 of blue-light source cooperation detect the photochromic and spectrum (blue spectrum, fluorescence spectrum or white-light spectrum) of this LED fluorescent material 4 (yellow fluorescent material); One analytical equipment 5; Link by an analysis module 6 and this pick-up unit 1 information; This analysis module 6 comprises: a spectrum loading unit 61 supplies loading various by LED fluorescent material 4 absorption or unabsorbed spectrum archives, and shows that spectral waveform is on a spectrum display unit 62; One spectrum synthesis unit 63 is used for the various spectral waveform that are shown on the spectrum display unit 62 are synthesized and are shown in this spectrum display unit 62; One spectrum computing unit 64 is used for the various spectrum that are shown on the spectrum display unit 62 are carried out the mathematical expression compose operation of addition, subtraction, multiplication or division; One spectrum storage element 65 will store through the spectrum of spectrum computing unit 64 compose operations; One colourity coordinate generation unit 66 is shown in above-mentioned various spectrum on the one colourity coordinate display unit 67 with the coordinate mode.Moreover above-mentioned LED fluorescent material 4 is accommodated (box body is not shown in the icon) by one by the nondestructive box body of Direct Sampling, and this box surface is provided with the quartz glass of a high penetration, is main by a high reflectance diffusive material then at.
Shown in accompanying drawing 3, be the block flow diagram of preferred embodiment of the present invention, find out that by knowing among the figure its detection step is: sample spectra signal capturing A; Quantitative correction conversion spectrum signal or call out quantitative spectrum archives B; Changing quantitative spectrum is radiation power parameter and the photochromic parameters C of vision; The spectrum arithmetic is analyzed and is simulated photochromic computing, or directly deposits the photochromic spectra database D that files in; Deposit the spectrum archive database in analyzing spectrum and the visual light chromatic number certificate accomplished with emulation, or directly finish formula E (spectrum can be blue spectrum, fluorescence spectrum or white-light spectrum).
Shown in accompanying drawing 4 to accompanying drawing 13, be source path synoptic diagram one, two and system's picture view one～eight of preferred embodiment of the present invention, its detection method is consulted diagram simultaneously, and detailed step is following:
(a) go out to bring out blue-light source and produce one initially to bring out blue spectrum 7 (shown in accompanying drawing 4) through an initial light source irradiation for blue-light source through an optical integration ball; (b) blue-light source that brings out through the optical integration ball shines in one on the LED fluorescent material of yellow fluorescent material, again in the 180 degree reflected back optics integrating spheres, is absorbed and brings out blue spectrum 71 (shown in accompanying drawing 5) and produce one; (c) it initially brings out blue spectrum 7 and is absorbed and brings out blue spectrum 71 and received by an analytical equipment, and analyzes through the analysis module in being built in; (d) being contained in spectrum loading unit 61 in the analysis module by one will initially bring out blue spectrum 7 and be absorbed and bring out blue spectrum 71 and be shown in (shown in accompanying drawing 6) on the spectrum display unit 62; (e) will be absorbed through spectrum loading unit 61 again and bring out the fluorescence spectrum 72 that blue spectrum 71 produced and be shown in (shown in accompanying drawing 7) on the spectrum display unit 62; (f) will be absorbed through the spectrum synthesis unit and bring out blue spectrum and fluorescence spectrum synthesizes to produce a white-light spectrum 73 and to be shown in (shown in accompanying drawing 8) on the spectrum display unit 62; (g) will be absorbed through a spectrum computing unit and bring out blue spectrum and fluorescence spectrum carries out the addition compose operation to produce a synthesize white light spectrum 74 and to be shown in (shown in accompanying drawing 9) on the spectrum display unit 62; (h) will initially bring out blue spectrum 7 through the spectrum computing unit again and be absorbed and bring out blue spectrum 71 and carry out additive operation to produce a fluorescent absorption amount spectrum 75 and to be shown in (shown in accompanying drawing 10) on the spectrum display unit 62; (i) through the spectrum computing unit synthesize white light spectrum 74 is carried out the computing of spectrum multiplication multiplying power to produce a reduction magnification synthesize white light spectrum 76 and to be shown in (shown in accompanying drawing 11) on the spectrum display unit 62 again; (j) through the spectrum computing unit fluorescence spectrum 72 is removed the emission conversion efficiency value 77 (as accompanying drawing 12 shown in) of last fluorescent absorption amount spectrum 75 to produce this LED fluorescent material again; (k) synthesize white light spectrum, fluorescent absorption amount spectrum, reduction magnification synthesize white light spectrum and emission conversion efficiency value are stored in the spectrum storage element 78 (shown in accompanying drawing 13).Moreover; The spectrum computing that it is above-mentioned; It is proofreaied and correct with absolute spectral radiant power and quantitative technique is a technical foundation; With the LED fluorescent material and bring out the spectrum signal that blue light detects and convert quantitative absolute spectral radiant power into, the operational analysis that so just can be correlated with in spectrum conversion back, for example: white-light spectrum is separated or is synthesized and bring out blue light and LED fluorescent materials etc.
After above-mentioned steps is accomplished; Can it be demonstrated complementary color toe-in composition or color area structure through a colourity coordinate generation unit; Shown in accompanying drawing 14 to accompanying drawing 18; Be the chromaticity coordinate figure one～five of preferred embodiment of the present invention, find out that by knowing among the figure its desire shows that the method for chromaticity coordinate figure is: (l) will initially bring out blue spectrum 7 generation one after the conversion of color function and bring out blue spectrum chromaticity coordinate 80 (shown in accompanying drawing 14) through a colourity coordinate generation unit 79; (m) through chromaticity coordinate generation unit 79 fluorescence spectrum 72 is produced a fluorescence spectrum chromaticity coordinate 81 (shown in accompanying drawing 15) after the conversion of color function again; (n) through chromaticity coordinate generation unit 79 synthesize white light spectrum 74 is produced a synthesize white light spectral chromaticity coordinates 82 (shown in accompanying drawing 16) after the conversion of color function again; (o) will bring out blue spectrum chromaticity coordinate 80, fluorescence spectrum chromaticity coordinate 81 and synthesize white light spectral chromaticity coordinates 82 again loads to produce a complementary color toe-in composition or color area structural drawing (shown in accompanying drawing 17 and accompanying drawing 18) jointly.More prior, test macro of the present invention and method thereof are to be built in general Lang Ke quantum conversion rule (Planck ' s law; Wavelength is short more; Energy is high more) the higher spectral wavelength of following its fluorescent material absorption energy, convert the lower spectral wavelength of energy to, according to this formed fluorescence spectrum quantitative measurement technology of rule basis; And need to chase after north standard correction (north source: National Institute Technology Standard through the world; NIST), except that the qualitative detection of making sample, also can fast quantification sample concentration size as quantitative usefulness.Spectrum parameter relevant in the system has passed through the spectroradio optical power correction all, carries out with the alignment technique method of standard.The quantitative arithmetical operation that visible light (Visible) spectroscopic data can be correlated with through system software; And quantitatively human eye tristimulus values function (the 1931 Color Matching Functions that formulated through C.I.E. (vision people's eye light association) are adjusted in the spectrum computing; Tristimulus values) is converted to C.I.E1931 chromaticity coordinate (C.I.E. 1931 Chromaticity Diagram) related colour colour parameter (chromaticity coordinate, colour temperature, drill colour index, main territory wavelength form and aspect and color purity) and vision lumen (Luminous Flux; Lumen) luminance parameter, the vision that can design different LED by this is photochromic.The method basis compute mode, technical field are integrated the technical foundation that converts into of C.I.E. visual color function at absolute spectroradio spectral power.And guide the user by this with the radiation intensity of moving extremely spectrum and the variation of spectral wavelength, as the linear equivalent running parameter of the photochromic characteristic changing of its vision.
Shown in accompanying drawing 19 and accompanying drawing 20; Be the synoptic diagram of CIE tristimulus values function of the present invention and the synoptic diagram of 1931 chromaticity coordinates; Can find out like above-mentioned human eye tristimulus values function (1931Color Matching Functions, Tristimulus values) and C.I.E1931 chromaticity coordinate (C.I.E. 1931Chromaticity Diagram) by figure.Person again; The material in fluorescence data storehouse can be done the comparison of qualitative and quantitative in the standard model spectrum in the intact heel spectra database of sampling measurement; Can three kinds of three groups of fluorescence efficiencies (quantum (photon) conversion efficiency, radiation (spectrum) conversion efficiency, vision (lumen or other vision light unit) conversion efficiency) be worth index for referencial use in addition, notice that the absorption receipts amount of blue spectrum and absorptivity absorbs blue spectrum and output fluorescence with reference to the LED fluorescent material quantitative spectrum change are brought out in the absorption of LED fluorescent material simultaneously in the lump.If in finished product and semi-manufactured goods quality management and control; It mainly mixes with other moulding material at the LED fluorescent material; The absolute light spectral intensity of its LED fluorescent material can become a direct ratio linear relationship with LED fluorescent material concentration; A direct ratio changes the parameter as the control of LED fluorescent material concentration thus, keeps stable concentration to stablize the processing procedure material in forming process and LED fluorescent material.The concentration of its LED fluorescent material of finished product that baking is in like manner accomplished also can be be directly proportional consistent with concentration of its fluorescence spectrum intensity size.If with research and development of products; The goal standard vision is photochromic to be reference data; Cooperate the corresponding fluorescence spectrum of blue spectrum in the fluorescence data storehouse that bring out of chip to cooperate again: find out near its photochromic complementary color line color structure, its accompanying drawing 14 to accompanying drawing 18 further specifies complementary color line color structure and makes up with spectrum change.Fluorescent material at LED is not in the time of can linear finding corresponding complementary color structure, can find close two kinds of LED fluorescent materials (more than two kinds) to remove synthetic immediate LED fluorescence spectrum, and is photochromic approaching with the LED of goal standard.The absolute strength ratio that new synthetic LED fluorescence spectrum coordinate can be adjusted the LED fluorescence spectrum is gone adjustment, can produce best fluorescence colourity coordinate points.This mode also is useful in the online synthesize white light of complementary color, and the photochromic condition of its white light can not coexist with fluorescence and the intensity of bringing out blue spectrum yet, and complementary color is online to be moved, and changes the LED white light optical color parameter that near emulation.Be example with the spectrum computing unit in addition, it is able to calculate the ratio of brightness and color, and is able to judge this brightness that has size of blue chip; And, can select the LED fluorescent material when sample is made in the experiment of manufacturing finished product, can find out the difference of concentration; Judge what of LED fluorescent material, and for reaching those advantages, shown in accompanying drawing 21 to accompanying drawing 23; Be the oscillogram one, two, three of blue spectrum of the present invention and fluorescence spectrum, its main account form is following:
One, hypothesis one standard colorimetric is 0.33 earlier; And spectrum is 140 lumens (shown in accompanying drawings 22) after synthesizing; And the brightness of a certain product is 7 lumens (brightness), in other words, desires to calculate its this product brightness and color ratio and then can calculate (shown in accompanying drawing 21 and accompanying drawing 22) like following formula:
（B×1/20）+（Y×1/20）=（W×1/20）；
（B/140）+（Y/140）=140；
Its (B/140)=3%, (Y/140)=97%;
Wherein, earlier blue light B and fluorescence Y are respectively dwindled 1/20, synthetic spectrum W also dwindles 1/20 simultaneously;
3% be first blue light condition by this, 97% is second blue light condition;
And 3%+97% is the brightness and the color ratio that reach is 100%;
If if non-140 lumens of the brightness of another product, but want above-mentioned color-values, can go to make according to aforesaid number percent.
Therefore, the user need only can obtain aforesaid color according to above-mentioned percentage.
Two, when selecting led chip, also be able to select to desire to want the led chip that uses, and this reference value is promptly calculated (shown in accompanying drawing 1) by formula through a reference value:
(BB-B) * 1/20=AB/20 (being absorbed the back);
(B * 1/20)+(AB * 1/20)=C (chip brightness);
Wherein, BB is not by the blue spectrum before the fluorescent absorption, and B is by the blue spectrum after the fluorescent absorption, and Y is a fluorescence spectrum;
Therefore, can originally (B * 1/20) be added (AB * 1/20) that is absorbed, can obtain the brightness power and the wavelength " C " of chip institute palpus;
The user can select the led chip that desire is made voluntarily by this.
When three, desire to ask the concentration of fluorescent powder this moment; At first desire to select a led chip (shown in accompanying drawing 23),, promptly can produce blue light strength B and can't match with the height of fluorescent powder W if when supposing that its fluorescent powder concentration is too dense or too light; Therefore being able to by the previous fluorescent powder reference value WS that calculates is benchmark; The light excessively fluorescent powder of row hypothesis concentration is W1 again, can (WS ÷ W1) be learnt the multiple that fluorescence concentration differs, and revises for the user.
Claims (10)
- A LED fluorescent material photochromic with the spectral detection system, it is characterized in that this detection system mainly includes:One pick-up unit detects the photochromic and spectrum of this LED fluorescent material by the cooperation of an initial light supply apparatus and an optical integration ball;One analytical equipment links by an analysis module and this detection of device information, and this analysis module comprises:One spectrum loading unit supplies loading various by absorption of LED fluorescent material or unabsorbed spectrum archives, and shows that spectral waveform is on a spectrum display unit;One spectrum synthesis unit is used for the various spectral waveform that are shown on the spectrum display unit are synthesized and are shown in this spectrum display unit;One spectrum computing unit is used for the various spectrum that are shown on the spectrum display unit are carried out the mathematical expression compose operation;One spectrum storage element will store through the spectrum of spectrum computing unit compose operation;One colourity coordinate generation unit is shown in above-mentioned various spectrum on the one colourity coordinate display unit with the coordinate mode.
- 2. LED fluorescent material according to claim 1 photochromic with the spectral detection system, it is characterized in that: wherein this spectrum be blue spectrum, fluorescence spectrum or white-light spectrum one of them.
- 3. the photochromic and spectral detection system of LED fluorescent material according to claim 1, it is characterized in that: the light source that wherein this initial light supply apparatus distributed is a blue-light source.
- 4. LED fluorescent material according to claim 1 photochromic with the spectral detection system, it is characterized in that: wherein this mathematical expression be addition, subtraction, multiplication or division one of them.
- 5. the photochromic and spectral detection system of LED fluorescent material according to claim 1, it is characterized in that: wherein this LED fluorescent material is a yellow fluorescent material.
- As claimed in claim 1, wherein the fluorescent material LED light color and spectral detection system, characterized in that: in which the LED fluorescent material is accommodated in the box body, and the surface of the cartridge body has a high transmittance glass stone Ying , and at the bottom by a high diffuse reflectance materials based.
- 7. photochromic and spectral method of detection of LED fluorescent material is characterized in that this detection method is:(a) go out to bring out blue-light source and produce one initially to bring out blue spectrum through an initial light source irradiation through an optical integration ball;(b) blue-light source that brings out through the optical integration ball shines on a LED fluorescent material, again in the 180 degree reflected back optics integrating spheres, is absorbed and brings out blue spectrum and produce one;(c) it initially brings out blue spectrum and is absorbed blue spectrum and is received by an analytical equipment, and analyzes through the analysis module of building in;(d) being contained in spectrum loading unit in the analysis module by one will initially bring out blue spectrum and be absorbed and bring out blue spectrum and be shown on the spectrum display unit;(e) will be absorbed through the spectrum loading unit again and bring out the fluorescence spectrum that blue spectrum produces and be shown on the spectrum display unit;(f) will be absorbed through the spectrum synthesis unit and bring out blue spectrum and fluorescence spectrum synthesizes to produce a white-light spectrum and to be shown on the spectrum display unit;(g) will be absorbed through a spectrum computing unit and bring out blue spectrum and fluorescence spectrum carries out the addition compose operation to produce a synthesize white light spectrum and to be shown on the spectrum display unit;(h) will initially bring out blue spectrum through the spectrum computing unit again and be absorbed and bring out blue spectrum and carry out additive operation to produce a fluorescent absorption amount spectrum and to be shown on the spectrum display unit;(i) through the spectrum computing unit synthesize white light spectrum is carried out the computing of spectrum multiplication multiplying power to produce a reduction magnification synthesize white light spectrum and to be shown on the spectrum display unit again;(j) through the spectrum computing unit fluorescence spectrum is removed last fluorescent absorption amount spectrum to produce the emission conversion efficiency value of this LED fluorescent material again;(k) synthesize white light spectrum, fluorescent absorption amount spectrum, reduction magnification synthesize white light spectrum and emission conversion efficiency value are stored in the spectrum storage element.
- 8. the photochromic and spectral method of detection of LED fluorescent material according to claim 7, it is characterized in that: wherein detection method more comprises:(l) will initially bring out blue spectrum generation one after the conversion of color function through a colourity coordinate generation unit and bring out the blue spectrum chromaticity coordinate;(m) through the chromaticity coordinate generation unit fluorescence spectrum is produced a fluorescence spectrum chromaticity coordinate after the conversion of color function again;(n) through the chromaticity coordinate generation unit synthesize white light spectrum is produced a synthesize white light spectral chromaticity coordinates after the conversion of color function again;(o) will bring out blue spectrum chromaticity coordinate, fluorescence spectrum chromaticity coordinate and synthesize white light spectral chromaticity coordinates again loads to produce a complementary color toe-in composition or color area structural drawing jointly.
- 9. the photochromic and spectral method of detection of LED fluorescent material according to claim 7 is characterized in that: wherein this initial light source is a blue-light source.
- 10. the photochromic and spectral method of detection of LED fluorescent material according to claim 7 is characterized in that: wherein this LED fluorescent material is a yellow fluorescent material.
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