CN102539406B - LED fluorescent material light color and spectrum detection method - Google Patents

Abstract

The invention relates to a system and a method for detecting the light color and the light spectrum of an LED fluorescent material, belonging to the optical instrument, which mainly carries out mutual operation or synthesis (analysis) on various spectra through a spectrum loading unit, a spectrum synthesis unit, a spectrum calculation unit, a spectrum storage unit and a chromaticity coordinate generation unit which are contained in an analysis device so as to achieve the purposes of directly testing the LED fluorescent material conversion efficiency and the light color characteristic quantitative spectrum and the light color detection without changing any LED fluorescent test sample form, and further, can prevent the LED fluorescent material with poor quality from entering the production so as to reduce the output of the poor light color product, can completely simulate the white light LED optical and spectral structure, and carry out complete and intact spectral separation on the white light LED spectrum of a test sample so as to form an induced blue light spectrum and a fluorescence spectrum which are independent of each other.

Description

LED fluorescent material light color and spectrum detection method

technical field

The present invention provides a light color and spectrum detection system for LED fluorescent materials, especially a direct test non-destructive and without changing any LED fluorescent test sample type, LED fluorescent material conversion efficiency and light color characteristics quantitative spectrum and light color The detection method, and the sampling is fast, does not consume redundant materials and manpower for making samples, and effectively filters bad LED fluorescent materials into production to reduce the output of bad light and color products. LED fluorescent material light color and spectrum detection system and its method . the

Background technique

Previously, when testing LED fluorescent materials, the LED industry needed to emit light close to the actual product structure before further analysis could be done. Therefore, the test optical path (Optical Path) of the sample must be the same as the light-emitting path of the white LED, and the induced light spectrum of its fluorescence must also be similar to the blue chip spectrum of the white LED. Furthermore, the traditional fluorescence spectroscopy system cannot meet the requirements of the above optical environment. There are two main reasons: First, the fluorescence spectroscopy system used in traditional analytical chemistry is mainly used to detect the spectral wavelengths that can be induced by fluorescent materials and after being induced. The resulting fluorescence spectrum wavelength signal. Chemical fluorescence spectrum analysis: It is mainly for the fluorescence spectrum analysis of a wide range of fluorescent materials. It is different from the purpose of white LEDs, and the optical path of the system is also different; the fluorescence spectrum used for chemical analysis must combine the induced spectral signal with the Fluorescence spectrum signals are completely separated to avoid interference. Therefore, it is necessary to adopt a 90-degree induced optical path design, so that the fluorescent spectral signal and the induced light signal form a 90-degree angle, and advance in their respective directions, and only allow the fluorescent signal to enter the spectrometer to process its spectral signal output; The main function of the fluorescence spectroscopy system for analysis is to test the relationship between the fluorescent material and the wavelength of the induced light. Therefore, a high-pressure xenon lamp with a wide wavelength in the ultraviolet is required as the light source for the induced fluorescence, and it must be dispersed and split to separate the induced light source from the light source. The light wave width is narrowed for induction. Therefore, the spectral conditions of the induced light source of the traditional chemical fluorescence spectroscopy system are very different from those of the white light LED fluorescence induction. the

Furthermore, in the past, fluorescent samples could not be taken for direct inspection, which has always been the biggest problem in the quality inspection of white light LEDs. The main reason is that fluorescent materials cannot be directly sampled for inspection. In the detection process, other materials need to be used: such as silica gel (Silicon) or resin (Epoxy) plus a chip (Diode Chip). The fluorescent material measured in this way has been interfered by the optical quality of other materials. In fact, it is impossible to clearly judge the samples: pure fluorescent materials, not only the light and color data measured by themselves are completely meaningless due to the interference factors of other materials, but also the way in which the samples are processed will lead to material and The time is too cumbersome, which also causes a waste of manpower, material resources and time. the

In addition, in the process of sampling for testing, other materials must be used. As mentioned above, there will be optical qualitative interference of materials, and the biggest interference is optical quantitative interference. The factors causing this interference are nothing more than In the process of mixing and adjusting the materials themselves, there will be troubles of uneven mixed concentrations of various materials, because it is quite difficult to control the concentration provided by each material, and it is difficult to guarantee that the concentration will be consistent on a single sample, or even Fluorescent material is a solid sample of inorganic crystalline powder, and will not be uniformly dissolved in molding materials such as silica gel and resin. Generally, the powder has different particle size distribution, about 5~20um powder particle size, showing uneven suspension distribution in the colloid, it must borrow part of the external force to continue to stir evenly, so it is very likely that the air will be mixed into the powder. Into the colloid to form bubbles, although this method makes the powder form a uniform Brownian motion state, but there is a risk of introducing air into the colloid to generate bubbles. Similarly, this method is affected by the distributed state of the fluorescent powder. Blue light induction also cannot effectively and evenly interact with fluorescent materials to produce stable fluorescent signals. the

In addition, in the process of testing, the LED fluorescent material must be mixed with other materials (that is called destruction) before the test can be carried out, and after use, it cannot be reused, which means that it must be discarded, which is very unfriendly to the environment. the

Contents of the invention

The main purpose of the present invention is to test that the optical path is consistent with the white LED optical path, which facilitates the simulation of the actual light color effect, and is a non-destructive detection method to ensure that the properties of the sample material are consistent before and after the test, and the solid-state LED light source is used to induce fluorescence. The material fluoresces in order to simulate white light, blue light and fluorescent spectra similar to white LEDs. the

The secondary purpose of the present invention is that the LED fluorescent material is induced by 180-degree vertical light (reflecting or penetrating the sample), and the optical path is 100% similar to the white LED, and the external sample tank test can ensure that the LED fluorescent material has a larger Convenient replacement space. the

Another object of the present invention is to be able to calculate the ratio of light output and color, and to judge the size of the blue light chip, and to select the LED fluorescent material when making a sample for the finished product experiment, and to judge the LED by seeing the difference in concentration. The amount of fluorescent material. the

In order to achieve the above-mentioned advantages, the main structure of the present invention includes a detection device, which detects the light color and spectrum of the LED fluorescent material through the cooperation of an initial light source and an optical integrating sphere, and performs spectral analysis through an analysis device, and mainly analyzes Operated by an analysis module, the analysis module includes a spectrum loading unit, a spectrum synthesis unit, a spectrum calculation unit, a spectrum storage unit and a chromaticity coordinate generation unit; when the initial light source (solid-state LED light source) irradiates an induced When the blue light source passes through the optical integrating sphere, an initial induced blue light spectrum is also generated, and the LED fluorescent material is induced by the light at 180 degrees vertically, forming the same path as the white LED, and then an absorbed blue light spectrum absorbed by the LED fluorescent material is generated. Then the initial induced blue light spectrum and the absorbed blue light spectrum are displayed on the spectrum display unit by the spectrum loading unit, and the fluorescence spectrum generated by the absorbed blue light spectrum is displayed on the spectrum display unit at the same time. The induced blue light spectrum and the fluorescent spectrum are synthesized to generate a white light spectrum and displayed on the spectrum display unit, and then the spectrum calculation unit performs spectrum addition, subtraction, multiplication, and division operations. First, the absorbed blue light spectrum and fluorescence spectrum are calculated. Adding and combining operations to generate a synthetic white light spectrum and displaying it on the spectrum display unit, and then subtracting the initial induced blue light spectrum and the absorbed induced blue light spectrum to generate a fluorescence absorption spectrum and displaying it on the spectrum display unit, and then Perform spectral multiplication magnification operation on the synthesized white light spectrum to generate a reduced magnification synthesized white light spectrum and display it on the spectrum display unit, then divide the fluorescence spectrum by the fluorescence absorption spectrum to generate the radiation conversion efficiency value of the LED fluorescent material, and then synthesize The white light spectrum, the fluorescence absorption spectrum, the reduced magnification synthetic white light spectrum and the radiation conversion efficiency value are stored in a spectrum storage unit, thereby completing the preliminary detection, and when the above steps are completed, a chromaticity coordinate generation unit can be used to generate The initial induced blue light spectrum, fluorescent spectrum, synthetic white light spectrum, etc. are converted by color functions to generate induced blue light spectrum chromaticity coordinates, fluorescent spectrum chromaticity coordinates and synthetic white light spectral chromaticity coordinates respectively, and display them on the screen to generate complementary colors Line structure diagram or color area structure diagram. the

In addition, the spectral calculation unit can further calculate the ratio of brightness to color, and the magnification of brightness and fluorescence concentration of LED chips, so that users can clearly grasp the reference parameters related to manufacturing LEDs. the

The present invention specifically includes:

A light color and spectrum detection system for LED fluorescent materials, the detection system mainly includes:

A detection device, which detects the light color and spectrum of the LED fluorescent material through the cooperation of an initial light source device and an optical integrating sphere;

An analysis device is connected to the detection device through an analysis module, and the analysis module includes:

A spectrum loading unit, for loading various spectrum files absorbed or not absorbed by LED fluorescent materials, and display the spectrum waveform on a spectrum display unit;

A spectrum synthesis unit, used to synthesize various spectrum waveforms displayed on the spectrum display unit and display them on the spectrum display unit; a spectrum calculation unit, used to synthesize various spectra displayed on the spectrum display unit Mathematical synthesis operation;

A spectrum storage unit, which stores the spectrum synthesized and calculated by the spectrum calculation unit;

A chromaticity coordinate generating unit displays the above-mentioned various spectra in a coordinate manner on a chromaticity coordinate display unit.

Wherein the spectrum is one of blue light spectrum, fluorescent spectrum or white light spectrum;

Wherein the light source emitted by the initial light source device is a blue light source;

where the mathematical formula is one of addition, subtraction, multiplication or division;

Wherein the LED fluorescent material is a yellow fluorescent material;

Wherein the LED fluorescent material is accommodated by a box body, and the surface of the box body is provided with a high-transmittance quartz glass, and a high-reflectivity diffuse material is mainly used at the bottom.

A method for detecting light color and spectrum of LED fluorescent materials. The detection method is as follows: (a) irradiating an induced blue light source through an initial light source and passing through an optical integrating sphere to generate an initial induced blue light spectrum; (b) passing through an optical The blue light source induced by the integrating sphere is irradiated on an LED fluorescent material, and then reflected back into the optical integrating sphere at 180 degrees to generate an absorbed blue light spectrum; (c) its initial induced blue light spectrum and absorbed blue light spectrum are analyzed by a Received by the device and analyzed by a built-in analysis module; (d) displaying the initial induced blue light spectrum and the absorbed induced blue light spectrum on a spectrum display unit through a spectrum loading unit included in the analysis module; ( e) Display the fluorescence spectrum generated by the absorption-induced blue light spectrum on the spectrum display unit through the spectrum loading unit; (f) Synthesize the absorption-induced blue light spectrum and the fluorescence spectrum through the spectrum synthesis unit to generate a white light spectrum and display it On the spectrum display unit; (g) through a spectrum calculation unit, the absorption-induced blue light spectrum and the fluorescence spectrum are added and synthesized to generate a synthetic white light spectrum and displayed on the spectrum display unit; (h) through the spectrum calculation unit Subtract the initial induced blue light spectrum and the absorbed induced blue light spectrum to generate a fluorescence absorption spectrum and display it on the spectrum display unit; A reduced magnification synthesizes the white light spectrum and displays it on the spectrum display unit; (j) divides the fluorescence spectrum by the fluorescence absorption spectrum through the spectrum calculation unit again to generate the radiation conversion efficiency value of the LED fluorescent material; (k) synthesizes white light The spectrum, the fluorescence absorption spectrum, the reduced magnification synthetic white light spectrum and the radiation conversion efficiency value are stored in a spectrum storage unit. the

The detection method further includes: (l) converting the initial induced blue light spectrum through a color function through a chromaticity coordinate generation unit to generate an induced blue light spectrum chromaticity coordinate; (m) through a chromaticity coordinate generation unit, converting the fluorescent spectrum through a color function After the conversion, a fluorescent spectrum chromaticity coordinate is generated; (n) the synthetic white light spectrum is converted by a color function through the chromaticity coordinate generating unit to generate a synthetic white light spectral chromaticity coordinate; (o) the induced blue light spectral chromaticity coordinate, The fluorescent spectral chromaticity coordinates and the synthetic white light spectral chromaticity coordinates are jointly loaded to generate a complementary color line structure diagram or a color region structure diagram. the

Wherein the initial light source is a blue light source;

Wherein the LED fluorescent material is a yellow fluorescent material.

With the above technology, the LED fluorescent material existing in the existing LED fluorescent material detection technology needs to emit light close to the actual product structure in order to do a further analysis, and the fluorescent material cannot be directly sampled and tested, so the measured fluorescent material It is also affected by the optical qualitative interference of other materials. In fact, it is impossible to clearly judge the samples made. In addition, the measured light and color data become completely meaningless due to the interference of other materials. The method will lead to too cumbersome materials and time, and also cause a waste of manpower, material resources and time. More importantly, the existing technology must first destroy the LED fluorescent material (that is, mix it with other materials) before testing, and it is not environmentally friendly. The problem that cannot be recycled and reused after use is broken through to achieve the practical progress of the present invention such as the above-mentioned advantages. the

The advantages of the present invention are:

1. The optical path of the test is consistent with the optical path of the white LED, which is convenient for the simulation of the actual light and color effect.

2. The difference between the present invention and the prior art is that it adopts a non-destructive detection method to ensure that the properties of the sample material are consistent before and after the test. the

3. Use solid-state LED light sources to induce fluorescent materials to produce fluorescence, so as to simulate white light, blue light and fluorescent spectra similar to white LEDs. the

4. The sample is induced by 180-degree vertical light (reflecting or penetrating the sample), which is 100% similar to the optical path of the white LED. It is also tested with an external sample tank; it can ensure that the sample has a large convenient sample replacement space. the

5. White light spectral decomposition (Curve Fittng) for white light to do color structure decomposition and white light toning simulation in its color structure complementary color online change. the

6. Quantum (photon) conversion efficiency, radiation (spectral) conversion efficiency and visual (lumen or other visual photometric unit) conversion efficiency can be obtained. the

7. Quantitative digital storage of white light, blue light and fluorescence spectra can be established to establish a digital spectral database. the

8. Quantitative spectral calculation: It can calculate the absolute absorption amount and relative absorption rate of LED fluorescent materials corresponding to the induced blue light. the

9. Provide absolute quantitative spectral arithmetic operation, as the visual light and color simulation effect operation of quantitative spectral database. the

10. Ensure that the light power of the induction light source is stable to ensure that the fluorescence spectral power is stable and consistent. the

11. Use the same spectrum as the blue LED chip to directly induce the fluorescent material to produce a fluorescent spectrum with the same structure as the actual white LED. the

12. Based on the quantitative calculation of the spectrum, several different fluorescent materials can be directly mixed on the analysis software to simulate the spectrum of a specific light color by mixing several different fluorescent materials in the spectral database operation mode. the

13. The chip blue light spectrum and LED fluorescent material spectrum with different induced wavelengths can also establish a spectral database for LED light color adjustment simulation. the

14. Using the light color matching between the fluorescence spectrum parameters and the induced blue light spectrum, the light color characteristics suitable for the LED fluorescent material can be determined without wasting any materials. the

15. Direct sampling fluorescent sample test carrier: It needs to have high penetration and high wear-resistant quartz glass and a fixed amount of sample placement area, and cooperate with the test optical path. The surface of the sample carrier must be a white surface that can be used for diffuse reflection . the

Description of drawings

FIG. 1 is a schematic block diagram of a preferred embodiment of the present invention. the

FIG. 2 is a second schematic block diagram of a preferred embodiment of the present invention. the

FIG. 3 is a block flow diagram of a preferred embodiment of the present invention. the

FIG. 4 is a first schematic diagram of light source paths in a preferred embodiment of the present invention. the

FIG. 5 is a second schematic diagram of light source paths in a preferred embodiment of the present invention. the

FIG. 6 is a first schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 7 is a second schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 8 is a third schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 9 is a fourth schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 10 is a fifth schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 11 is a sixth schematic diagram of a system screen in a preferred embodiment of the present invention. the

FIG. 12 is a schematic diagram of a system screen VII of a preferred embodiment of the present invention. the

FIG. 13 is the eighth schematic diagram of the system screen of the preferred embodiment of the present invention. the

FIG. 14 is a first chromaticity coordinate diagram of a preferred embodiment of the present invention. the

Fig. 15 is the second chromaticity coordinate diagram of the preferred embodiment of the present invention. the

Fig. 16 is the third chromaticity coordinate diagram of the preferred embodiment of the present invention. the

FIG. 17 is a diagram 4 of chromaticity coordinates of a preferred embodiment of the present invention. the

FIG. 18 is the fifth chromaticity coordinate diagram of the preferred embodiment of the present invention. the

Fig. 19 is a schematic diagram of the CIE tristimulus value function of the present invention. the

Fig. 20 is a schematic diagram of 1931 chromaticity coordinates of the present invention. the

Fig. 21 is a waveform diagram 1 of the blue light spectrum and the fluorescence spectrum of the present invention. the

Fig. 22 is the second wave form of the blue light spectrum and fluorescence spectrum of the present invention. the

Fig. 23 is the third wave form of blue light spectrum and fluorescence spectrum of the present invention. the

Detailed ways

As shown in accompanying drawing 1 and accompanying drawing 2, it is block schematic diagram one and two of the preferred embodiment of the present invention, can clearly find out that the detection system of the present invention mainly comprises from the figure: a detection device 1, by a for emitting The cooperation of the initial light source device 2 of the blue light source and an optical integrating sphere 3 detects the light color and spectrum (blue light spectrum, fluorescent spectrum or white light spectrum) of the LED fluorescent material 4 (yellow fluorescent material); an analysis device 5, The analysis module 6 is connected with the detection device 1 through information, and the analysis module 6 includes: a spectrum loading unit 61, which is used to load various spectrum files absorbed or not absorbed by the LED fluorescent material 4, and display the spectrum waveform on On a spectrum display unit 62; a spectrum synthesis unit 63, for synthesizing various spectral waveforms displayed on the spectrum display unit 62 and displaying them on the spectrum display unit 62; a spectrum calculation unit 64, for combining A variety of spectra displayed on the spectrum display unit 62 are subjected to mathematical formula synthesis operations such as addition, subtraction, multiplication or division; a spectrum storage unit 65 stores the spectra synthesized by the spectrum calculation unit 64; a chromaticity coordinate generation unit 66 , displaying the above-mentioned various spectra in a coordinate manner on a chromaticity coordinate display unit 67 . Furthermore, the above-mentioned LED fluorescent material 4 is accommodated by a non-destructive box body for direct sampling (the box body is not shown in the figure), and the surface of the box body is provided with a high-transmittance quartz glass, and at the bottom The area is dominated by a highly reflective diffuse material. the

As shown in accompanying drawing 3, it is a block flow chart of a preferred embodiment of the present invention. It can be clearly seen from the figure that the detection steps are: sample spectral signal acquisition A; quantitative calibration conversion spectral signal or call quantitative spectral file B ; convert the quantitative spectrum into radiation power parameters and visual light color parameters C; spectral four operation analysis and simulated light color calculation, or directly store in the light color spectrum database to file D; store the completed spectrum and visual light color data in the analysis and simulation Enter the spectrum file database, or directly end program E (spectrum can be blue light spectrum, fluorescence spectrum or white light spectrum). the

As shown in accompanying drawings 4 to 13, schematic diagrams 1 and 2 of the light source path and schematic diagrams 1 to 8 of the system screens of the preferred embodiments of the present invention, the detection method also refers to the illustrations, and the detailed steps are as follows:

(a) An induced blue light source is irradiated by an initial blue light source and passes through an optical integrating sphere to generate an initial induced blue light spectrum 7 (as shown in Figure 4); (b) passing through an optical integrating sphere The induced blue light source is irradiated on an LED fluorescent material that is a yellow fluorescent material, and then reflected back into the optical integrating sphere at 180 degrees to generate an absorbed induced blue light spectrum 71 (as shown in Figure 5); (c) its The initial induced blue light spectrum 7 and the absorbed induced blue light spectrum 71 are received by an analysis device, and analyzed by a built-in analysis module; The induced blue light spectrum 7 and the absorbed blue light spectrum 71 are displayed on a spectrum display unit 62 (as shown in FIG. 6 ); (e) the fluorescence spectrum 72 generated by the absorbed induced blue light spectrum 71 is passed through the spectrum loading unit 61 displayed on the spectrum display unit 62 (as shown in FIG. 7 ); (f) the absorption-induced blue light spectrum and the fluorescence spectrum are synthesized by the spectrum synthesis unit to generate a white light spectrum 73 and displayed on the spectrum display unit 62 (such as shown in Figure 8); (g) through a spectrum calculation unit, the absorbed blue light spectrum and the fluorescence spectrum are added and synthesized to generate a synthetic white light spectrum 74 and displayed on the spectrum display unit 62 (as shown in Figure 9 (h) Subtract the initial induced blue light spectrum 7 and the absorbed induced blue light spectrum 71 through the spectrum calculation unit to generate a fluorescence absorption spectrum 75 and display it on the spectrum display unit 62 (as shown in Figure 10 shown); (i) again through the spectrum calculation unit, the synthetic white light spectrum 74 is subjected to spectral multiplication magnification operation to generate a reduced magnification synthetic white light spectrum 76 and displayed on the spectrum display unit 62 (as shown in Figure 11); (j ) through the spectrum calculation unit to divide the fluorescence spectrum 72 by the fluorescence absorption spectrum 75 to generate the radiation conversion efficiency value 77 of the LED fluorescent material (as shown in Figure 12); (k) synthesize the white light spectrum, fluorescence absorption The spectrum, the reduced magnification synthetic white light spectrum and the radiation conversion efficiency value are stored in a spectrum storage unit 78 (as shown in FIG. 13 ). Furthermore, the above-mentioned spectral calculation is based on the absolute spectral radiation power correction and quantitative technology, and converts the spectral signal detected by the LED fluorescent material and the induced blue light into a quantitative absolute spectral radiation power, so that the spectral conversion Afterwards, relevant calculation and analysis can be carried out, such as: separation of white light spectrum or synthesis of induced blue light and fluorescence of LED fluorescent materials.

After the above steps are completed, a chromaticity coordinate generating unit can be used to display the complementary color line structure diagram or color area structure, as shown in accompanying drawings 14 to 18, which are chromaticity coordinates of preferred embodiments of the present invention From Figures 1 to 5, it can be clearly seen that the method for displaying the chromaticity coordinate diagram is as follows: (1) Convert the initial induced blue light spectrum 7 through a color function to generate an induced blue light spectrum through a chromaticity coordinate generating unit 79 Chromaticity coordinates 80 (as shown in Figure 14); (m) the fluorescent spectrum 72 is transformed by a color function through the chromaticity coordinate generating unit 79 to generate a fluorescent spectrum chromaticity coordinates 81 (as shown in Figure 15); (n) Convert the synthesized white light spectrum 74 to a color function through the chromaticity coordinate generating unit 79 to generate a synthesized white light spectrum chromaticity coordinates 82 (as shown in Figure 16); (o) then convert the induced blue light spectrum to the chromaticity coordinates 80. The fluorescent spectral chromaticity coordinates 81 and the synthetic white light spectral chromaticity coordinates 82 are jointly loaded to generate a complementary color line structure diagram or a color region structure diagram (as shown in Figure 17 and Figure 18 ). More importantly, the test system and its method of the present invention are based on Planck's law of quantum conversion (Planck's law; the shorter the wavelength, the higher the energy), the spectral wavelength of which the fluorescent material absorbs higher energy is converted into Spectral wavelengths with lower energy, based on this rule, form the technical basis for quantitative detection of fluorescence spectra, and need to be calibrated by international retrospective standards (Suoyuan: National Institute Technology Standard, NIST). In addition to qualitative detection of samples, it is also The sample concentration can be quickly quantified for quantitative purposes. The relevant spectral parameters in the system have been calibrated by the optical power of the optical radiation, and are carried out by standard calibration techniques. Visible light (Visible) spectral data can be related to quantitative arithmetic operations through system software, and quantitative spectral operations can be adjusted through the human eye tristimulus value function (1931 Color Matching Functions , Tristimulus values) formulated by C.I.E. Convert to C.I.E. 1931 Chromaticity Diagram (C.I.E. 1931 Chromaticity Diagram) related color parameters (chromaticity coordinates, color temperature, color rendering index, main domain wavelength hue and color purity) and visual lumen (Luminous Flux, lumen) brightness parameters, so as to design Display the visual light color of different LEDs. The basic operation method of this method is based on the conversion of C.I.E. visual color function in the technical field of absolute spectroscopic radiation spectral power integration. In this way, the user is guided to take the change of the radiant intensity and spectral wavelength of the absolute spectrum as the linear equivalent change parameter of the change of its visual light color characteristics. the

As shown in accompanying drawing 19 and accompanying drawing 20, it is the schematic diagram of the CIE tristimulus value function and the schematic diagram of 1931 chromaticity coordinates of the present invention, it can be seen from the figure that the above-mentioned human eye tristimulus value function (1931 Color Matching Functions, Tristimulus values) And C.I.E1931 chromaticity coordinates (C.I.E. 1931Chromaticity Diagram). Moreover, the materials in the fluorescence spectrum database can be qualitatively and quantitatively compared with the standard sample spectra in the spectrum database after sampling and measurement. In addition, three groups of fluorescence efficiencies (quantum (photon) conversion efficiency, radiation (spectrum) conversion efficiency, etc. Efficiency, visual (lumen or other visual photometric unit) conversion efficiency) values are used as reference indicators, and at the same time pay attention to the absorption and absorption of blue light spectrum induced by the absorption of LED fluorescent materials Quantification of spectral changes. In terms of quality control of finished products and semi-finished products, it is mainly in the mixing of LED fluorescent materials and other molding materials, the absolute spectral intensity of the LED fluorescent materials will be proportional to the concentration of the LED fluorescent materials, and this proportional change can be used as LED fluorescent materials Concentration control parameters to stabilize process materials and maintain a stable concentration of LED fluorescent materials during the molding process. Similarly, the concentration of the LED fluorescent material in the finished product after baking will also be proportional to the intensity of the fluorescent spectrum and the concentration. In terms of product development, the visual light color of the target specification is used as a reference standard, and then the corresponding induced blue light spectrum of the chip is coordinated with the fluorescence spectrum in the fluorescence spectrum database: find the color structure of the complementary color line closest to its light color, and its attached FIG. 14 to FIG. 18 further illustrate the combination of the color structure of the complementary color line and the spectral change. When the fluorescent material of the LED cannot find the corresponding complementary color structure linearly, two similar LED fluorescent materials (more than two types) can be found to synthesize the closest LED fluorescent spectrum, which is close to the LED light color of the target specification. The newly synthesized LED fluorescent spectrum coordinates can be adjusted by adjusting the absolute intensity ratio of the LED fluorescent spectrum, which will produce the best fluorescent chromaticity coordinate points. This method is also applicable to the online synthesis of white light with complementary colors, and the light color conditions of the white light will also move on the complementary color line with the intensity of the fluorescent and induced blue light spectra, changing the light color parameters of the LED white light closest to the simulation. In addition, taking the spectrum calculation unit as an example, it can calculate the ratio of brightness and color, and can judge the brightness of the blue-ray chip, and can choose LED fluorescent materials for the finished product experiment to make samples, and the concentration can be seen. difference, to determine the amount of LED fluorescent material, and in order to achieve these advantages, as shown in Figure 21 to Figure 23, it is the waveform diagrams 1, 2 and 3 of the blue light spectrum and fluorescent spectrum of the present invention, and its main calculation methods as follows:

1. Assume that a standard chromaticity is 0.33, and the spectral synthesis is 140 lumens (as shown in Figure 22), and the brightness of a certain product is 7 lumens (brightness). In other words, it is desired to calculate the brightness and color ratio of the product Then it can be calculated by the following formula (as shown in Figure 21 and Figure 22):

(B×1/20)+(Y×1/20)=(W×1/20);

(B/140)+(Y/140)=140;

Its (B/140)=3%, (Y/140)=97%;

Among them, the blue light B and the fluorescent Y are reduced by 1/20, and the synthetic spectrum W is also reduced by 1/20;

So 3% is the first Blu-ray condition, and 97% is the second Blu-ray condition;

And 3%+97% means the achieved brightness and color ratio is 100%;

If the brightness of another product is not 140 lumens, but you want the above color value, you can manufacture it according to the above percentage.

Therefore, the user can obtain the aforementioned colors only according to the above-mentioned percentages. the

2. When selecting LED chips, you can also select the LED chip you want to use through a reference value, and the reference value is calculated by the following formula (as shown in Figure 1):

(BB－B)×1/20=AB/20 (after being absorbed);

(B×1/20)+(AB×1/20)=C (chip brightness);

Among them, BB is the blue light spectrum before being absorbed by fluorescence, B is the blue light spectrum after being absorbed by fluorescence, and Y is the fluorescence spectrum;

Therefore, the original (B×1/20) can be added to the absorbed (AB×1/20), and the brightness power and wavelength “C” required by the chip can be obtained;

In this way, the user can select the LED chip to be manufactured by himself.

3. At this time, when the concentration of the phosphor powder is desired, one needs to select an LED chip first (as shown in Figure 23). If the concentration of the phosphor powder is too thick or too light, the blue light intensity B and the phosphor W will be produced. The heights cannot be matched, so based on the previously calculated fluorescent powder reference value WS, and assuming that the fluorescent powder with too light concentration is W1, then (WS÷W1) can be used to obtain the multiple of the difference in fluorescence concentration, which can be used for The user makes corrections. the

Claims (3)

1. A light color and spectrum detection method for LED fluorescent materials, characterized in that the detection method is: (a) Irradiate an induced blue light source through an initial light source and pass through an optical integrating sphere to generate an initial induced blue light spectrum; (b) The induced blue light source passing through the optical integrating sphere is irradiated on an LED fluorescent material, and then reflected back into the optical integrating sphere at 180 degrees to generate an absorbed induced blue light spectrum; (c) Its initial induced blue light spectrum and absorbed blue light spectrum are received by an analysis device and analyzed by a built-in analysis module;  (d) Displaying the initial induced blue light spectrum and the absorbed induced blue light spectrum on a spectrum display unit by means of a spectrum loading unit included in the analysis module; (e) Display the fluorescence spectrum generated by the absorption-induced blue light spectrum on the spectrum display unit through the spectrum loading unit; (f) Synthesize the absorbed blue light spectrum and fluorescence spectrum through the spectrum synthesis unit to generate a white light spectrum and display it on the spectrum display unit; (g) Adding and combining the absorbed blue light spectrum and the fluorescent spectrum through a spectrum calculation unit to generate a synthetic white light spectrum and display it on the spectrum display unit; (h) Subtract the initial induced blue light spectrum and the absorbed induced blue light spectrum through the spectrum calculation unit to generate a fluorescence absorption spectrum and display it on the spectrum display unit; (i) Perform spectral multiplication and magnification operation on the synthetic white light spectrum through the spectrum calculation unit again to generate a reduced magnification synthetic white light spectrum and display it on the spectrum display unit; (j) Divide the fluorescence spectrum by the fluorescence absorption spectrum through the spectrum calculation unit again to generate the radiation conversion efficiency value of the LED fluorescent material; (k) storing the synthetic white light spectrum, the fluorescence absorption spectrum, the reduced magnification synthetic white light spectrum and the radiation conversion efficiency value in a spectrum storage unit. 2. The method for detecting light color and spectrum of LED fluorescent materials according to claim 1, wherein the detection method further comprises:  (l) converting the initial induced blue light spectrum through a color function through a chromaticity coordinate generation unit to generate an induced blue light spectrum chromaticity coordinate; (m) Convert the fluorescent spectrum through the color function through the chromaticity coordinate generating unit to generate a fluorescent spectral chromaticity coordinate; (n) Convert the synthetic white light spectrum through the color function through the chromaticity coordinate generating unit to generate a synthetic white light spectral chromaticity coordinate; (o) The induced blue light spectral chromaticity coordinates, the fluorescent spectral chromaticity coordinates and the synthetic white light spectral chromaticity coordinates are loaded together to generate a complementary color line structure diagram or a color region structure diagram. 3. The method for detecting light color and spectrum of LED fluorescent materials according to claim 1, wherein the initial light source is a blue light source. 4. The method for detecting light color and spectrum of LED fluorescent material according to claim 1, wherein the LED fluorescent material is a yellow fluorescent material.

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