Color temperature adjusting method based on black body radiation curve matching

Abstract

The invention discloses a color temperature adjusting method based on black body radiation curve matching. The method comprises the following steps: configuring a light source comprising three LED channels; wherein the first LED channel light source outputs short-wave purple light of 400-430 nm, and a GaN-on-SiC purple light chip packaged by packaging glue containing first fluorescent powder is adopted; the second LED channel light source outputs full-wave-band white light of 400-700 nm, and a purple light chip packaged by packaging glue containing second fluorescent powder is adopted; the third LED channel light source outputs red light with the long wave of 700-750 nm, and a blue light chip packaged by packaging glue containing third fluorescent powder is adopted; collecting spectral data of a target area through a four-node cross-distributed spectral sensor to obtain a current spectrum; calculating a deviation value delta S between the current spectrum and a preset spectrum template based on the blackbody radiation curve; and dynamically adjusting a three-channel light source according to the deviation value to realize the matching of the spectrum and the blackbody curve in the color temperature range of 1500K-12000K.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of LED, and particularly relates to a color temperature adjustment method based on blackbody radiation curve matching. BACKGROUND

[0002] The current LED lighting system has three technical bottlenecks in realizing wide color temperature adjustment:

[0003] Spectrum loss: The traditional LED is limited by the phosphor excitation efficiency, and the radiation intensity in the 400-430nm short-wave violet light region is less than 5% of sunlight, and the proportion of 700-750nm long-wave red light is less than 4%, resulting in a color rendering index R9≤30 (museum / medical lighting requires R9≥90).

[0004] Narrow color temperature range: The mainstream double-channel mixed light scheme (such as 2700K+5700K combination) can only cover the range of 2700K-5700K, and cannot meet the scene requirements of ultra-low color temperature (1500K) and ultra-high color temperature (12000K).

[0005] Color coordinate deviation: The color coordinates of the mixed light deviate from the blackbody radiation curve (Planckian Locus) seriously, especially at the color temperature of 4000K, the actual measurement CIE1931 color deviation Δuv≥0.01 (human eye threshold), CIEDE2000 color difference ΔE>5, causing obvious color deviation.

[0006] Defects of existing solutions: The single blue chip excitation system cannot consider short-wave violet light and long-wave red light; the phosphor ratio is not optimized for the blackbody curve, and there is a spectral dip in the 431-699nm band; there is a lack of dynamic compensation mechanism for junction temperature drift and aging attenuation.

[0007] Therefore, there is an urgent need for a multi-channel spectrum regulation technology that can match the blackbody radiation curve, cover the full color temperature range of 1500K-12000K, and eliminate color deviation. SUMMARY

[0008] Therefore, the main purpose of the present application is to provide a color temperature adjustment method based on blackbody radiation curve matching.

[0009] To achieve the above purpose, the technical scheme of the present application is as follows:

[0010] A color temperature adjustment method based on blackbody radiation curve matching, the method comprising:

[0011] Configuring a light source containing three LED channels;

[0012] Collecting target area spectrum data through a four-node cross-distributed spectrum sensor to obtain the current spectrum;

[0013] calculating a deviation value ΔS of the current spectrum from a preset spectrum template based on a blackbody radiation curve;

[0014] dynamically adjusting the three-channel light source according to the deviation value to realize matching of the spectrum with the blackbody curve in a color temperature range of 1500K-12000K;

[0015] The dynamically adjusting the three-channel light source according to the deviation value to realize matching of the spectrum with the blackbody curve in a color temperature range of 1500K-12000K specifically includes: when the target color temperature >5700K: the duty cycle increment of the first LED channel light source =0.8×ΔS <400-430> ; the current reduction amount of the third LED channel light source =100×ΔS <700 - 750> ; when the target color temperature <2700K: the first LED channel light source is turned off; the current increment of the third LED channel light source =150×ΔS <700-750> ; the duty cycle of the second LED channel light source is reduced to 70%; when 2700K≤the target color temperature ≤5700K: the duty cycle increment of the first LED channel light source =0.4×ΔS <400-430> ; the current increment of the third LED channel light source =50×ΔS <700-750> ; the duty cycle of the second LED channel light source is maintained at 85%-95%.

[0016] Preferably, the configuration contains three LED channel light sources, specifically including: the first LED channel light source: adopting a GaN-on-SiC ultraviolet chip and a first phosphor package containing Sr5(PO4)3Cl:Ce 3+ , CaAlSiN3:Eu 2+ and YAG:Ce 3+ , outputting 400-430nm short-wave ultraviolet light;

[0017] The second LED channel light source: adopting a GaN-on-SiC ultraviolet chip and a second phosphor package containing blue-violet powder Sr5(PO4)3Cl:Eu 2+ , green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow-spectrum red powder K3SiF7:Mn 4+ , cyan powder CaAlSiN3:Ce 3+ , outputting 400-700nm full-waveband white light;

[0018] The third LED channel light source: adopting a blue light chip and containing deep red phosphor CaSiN3:Eu 2+ , super-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+The third phosphor encapsulation outputs 700-750nm long-wavelength red light.

[0019] Preferably, the blue powder Sr5(PO4)3Cl:Eu in the first LED channel light source 2+ , Cyanite CaAlSiN3:Ce 3+ Yellow powder YAG:Ce 3+ The dosage ratio is 62:33:5.

[0020] Preferably, in the encapsulating layer of the first LED channel light source, the bottom layer contains blue powder Sr5(PO4)3Cl:Eu. 2+ Furthermore, the adhesive layer with a thickness of 50-80μm and the intermediate layer contain CaAlSiN3:Ce powder. 3+ Furthermore, the adhesive layer is 30-50μm thick, and the top layer contains yellow powder YAG:Ce. 3+ The adhesive layer has a thickness of 10-20 μm. Preferably, the second LED channel light source contains blue-violet powder Sr5(PO4)3Cl:Eu and green powder β-SiAlON:Eu. 2+ Yellow powder Lu3Al5O 12 :Ce 3+ Narrow-spectrum red phosphor K3SiF7:Mn 4+ , Cyanite CaAlSiN3:Ce 3+ The mass ratio is 20:25:30:15:10.

[0021] Preferably, the bottom layer of the second LED channel light source, which is formed by the encapsulant layer, contains a 40-60 μm thick layer of blue-violet powder Sr5(PO4)3Cl:Eu, and the middle layer contains green powder β-SiAlON:Eu. 2+ Yellow powder Lu3Al5O 12 :Ce 3 + Furthermore, the adhesive layer and transition layer, with a thickness of 50-70μm, contain CaAlSiN3:Ce powder. 3+ Furthermore, the adhesive layer is 20-30 μm thick, and the top layer contains narrow-spectrum red phosphor K3SiF7:Mn. 4+ And the adhesive layer is 30-40μm thick.

[0022] Preferably, the deep red phosphor CaSiN3:Eu in the third LED channel light source 2+ Super deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The mass ratio is 75:25.

[0023] Preferably, the bottom layer of the encapsulant layer of the third LED channel light source contains deep red phosphor CaSiN3:Eu.2+ and the glue layer with a thickness of 60-80 mu m, the top layer is provided with an ultra-deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ and the glue layer with a thickness of 40-60 mu m.

[0024] Preferably, it also includes three-dimensional dynamic compensation for the third LED channel light source, specifically including: determining the current compensation amount ΔI according to the driving current variation ΔI, the junction temperature variation ΔT and the fluorescent powder aging attenuation coefficient ΔC comp : ΔI comp = 0.2 ΔI + 0.5 ΔT - 0.3 ΔC; determining the compensated current value I output = I 基准 + ΔI comp ; wherein ΔC is updated in real time through monthly spectral decay detection.

[0025] Preferably, the deviation value ΔS of the current spectrum and the preset spectrum template based on the blackbody radiation curve is calculated, specifically including: determining the deviation value according to

[0026] wherein T i is the radiation intensity value of the preset spectrum template, S i is the radiation intensity value of the current spectrum, and N is the total sampling point number; is the summation of the sampling points in the 400-430 nm waveband, is the summation of the sampling points in the 431-699 nm waveband, is the summation of the sampling points in the 700-780 nm waveband, the sampling points in the 400-430 nm, 431-699 nm and 700-780 nm wavebands are respectively given a weight of 40%, 30% and 30%, and the deviation value corresponding to each waveband is obtained according to the weight of each waveband; N1 is the actual sampling point number in the 400-430 nm waveband, N2 is the actual sampling point number in the 431-699 nm waveband, and N3 is the actual sampling point number in the 700-780 nm waveband.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] The present application realizes the precise matching of the LED light source with the blackbody curve in the super-wide color temperature range of 1500K-12000K through the synergy of the three-channel spectrum structure design, the blackbody radiation curve mapping and the dynamic weighting adjustment algorithm, completely eliminates the spectral cliff and color coordinate deviation of the traditional scheme, and improves the color rendering index R9 from ≤30 to ≥95 and compresses the color deviation Δuv to <0.003. BRIEF DESCRIPTION OF DRAWINGS

[0029] ​The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0030] Figure 1 A flow chart of a color temperature adjustment method based on blackbody radiation curve matching is provided for an embodiment of the application. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as limiting the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] It should be noted that in this document, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, article or device comprising the element.

[0034] An embodiment of the present application provides a color temperature adjustment method based on blackbody radiation curve matching, as shown in Figure 1 The method comprises the following steps:

[0035] Step 101, configuring a light source containing three LED channels;

[0036] Specifically, the first LED channel light source: adopting GaN-on-SiC violet chip and containing Sr5(PO4)3Cl:Ce 3+ , CaAlSiN3:Eu 2+ and YAG:Ce 3+The first phosphor package of the first LED channel light source is a blue phosphor Sr5(PO4)3Cl:Eu

[0037] Generally, the wavelength of the violet light chip is 395±5nm. In order to meet the requirement of the first LED channel light source outputting short-wave violet light in the wavelength range of 400-430nm, the first phosphor is added.

[0038] The emission spectrum of the blue phosphor Sr5(PO4)3Cl:Eu 2+ and the greenish phosphor CaAlSiN3:Ce 3+ is superimposed to form a double-peak compensation structure (405nm+422nm) in the wavelength range of 400-430nm, so that the radiation intensity in the wavelength range is >80%; and a trace of yellow phosphor YAG:Ce 3+ is added to absorb yellow-green light in the wavelength range of 450-550nm, so that the decay rate of the radiation in the wavelength range above 430nm is increased by 3 times.

[0039] The blue phosphor Sr5(PO4)3Cl:Eu 2+ , the greenish phosphor CaAlSiN3:Ce 3+ , and the yellow phosphor YAG:Ce 3+ are used in a proportion of 62:33:5.

[0040] Further, in the first LED channel light source, the bottom layer is provided with a glue layer containing the blue phosphor Sr5(PO4)3Cl:Eu 2+ with a thickness of 50-80μm, the middle layer is provided with a glue layer containing the greenish phosphor CaAlSiN3:Ce 3+ with a thickness of 30-50μm, and the top layer is provided with a glue layer containing the yellow phosphor YAG:Ce 3+ with a thickness of 10-20μm.

[0041] The bottom layer is provided with a blue phosphor glue layer (directly absorbing 395nm violet light)→the middle layer is provided with a greenish phosphor glue layer (secondary excitation to complete the wavelength range)→the top layer is provided with a yellow phosphor glue layer (filtering stray light), and the thickness of each layer is 50-80μm, 30-50μm, and 10-20μm respectively.

[0042] The first LED channel adopts a three-layer gradient packaging structure: the bottom layer is provided with a blue phosphor (Sr5(PO4)3Cl:Eu 2+ directly absorbing 395nm violet light and emitting 405nm short-wave violet light; the middle layer is provided with a greenish phosphor (CaAlSiN3:Ce 3+ producing 422nm secondary peak through 5d-4f transition of Ce 3+ ; and the top layer is provided with a trace of yellow phosphor (YAG:Ce 3+ selectively absorbing 450-550nm stray light.

[0043] Further, a titanium dioxide (TiO2) reflective layer (50-80 nm thick) can be added to the surface of the violet chip to reflect deep ultraviolet light of <400 nm and reduce harmful radiation.

[0044] The second LED channel light source uses a GaN-on-SiC violet chip and a second phosphor package containing blue-violet powder Sr5(PO4)3Cl:Eu 2+ , green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow-spectrum red powder K3SiF7:Mn 4+ , and cyan powder CaAlSiN3:Ce 3+ to output 400-700 nm full-band white light.

[0045] In general, the output wavelength of the violet chip is 395±2 nm. To meet the requirement of the second LED channel light source to output 400-700 nm full-band white light in the present application, a second phosphor is added.

[0046] The blue-violet powder Sr5(PO4)3Cl:Eu directly emits 410-430 nm short-wave violet light by being excited by the violet chip, filling the weakest blue-violet band in the traditional scheme; the cyan powder CaAlSiN3:Ce 3+ emits 450-480 nm cyan light after absorbing 395 nm photons, completely eliminating the 430-500 nm spectral cliff; the green powder β-SiAlON:Eu 2+ forms a molecular-level premixing structure with the yellow powder Lu3Al5O 12 :Ce 3+ to construct a continuous wide peak (half peak width 82 nm) in the 520-600 nm band, eliminating the depression in the cyan-yellow transition zone of 500-580 nm; the narrow-spectrum red powder K3SiF7:Mn 4+ precisely locks the 650 nm red light band with a 4 nm ultra-narrow half peak width, avoiding the spectral line broadening defect of traditional red phosphor.

[0047] The blue-violet powder Sr5(PO4)3Cl:Eu, green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow-spectrum red powder K3SiF7:Mn 4+ , and cyan powder CaAlSiN3:Ce 3+ are mixed in a mass ratio of 20:25:30:15:10.

[0048] Further, the bottom layer of the adhesive layer of the packaging adhesive can be provided with an adhesive layer containing blue-violet powder Sr5(PO4)3Cl:Eu, the middle layer can be provided with an adhesive layer containing green powder β-SiAlON:Eu2+ , yellow Lu3Al5O 12 :Ce 3+ , the transition layer is provided with a glue layer containing green CaAlSiN3:Ce 3+ , and the top layer is provided with a glue layer containing narrow-spectrum red K3SiF7:Mn 4+ .

[0049] The bottom layer is a blue-violet powder glue layer, the middle layer is a green powder + yellow powder mixed glue layer, the transition layer is an aqua powder glue layer, and the top layer is a narrow-spectrum red powder glue layer, and the thicknesses of the layers are 40-60 μm, 50-70 μm, 20-30 μm, and 30-40 μm, respectively, to realize seamless spectrum connection.

[0050] In the four-layer packaging of the second LED channel, the transition layer aqua powder (CaAlSiN3:Ce 3+ ) and the top layer narrow-spectrum red powder (K3SiF7:Mn 4+ ) form a spectrum bridge to eliminate the traditional aqua-red gap in the 500-650 nm band.

[0051] The third LED channel light source: a blue light chip and a third fluorescent powder packaging containing deep red fluorescent powder CaSiN3:Eu 2+ and super-deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ are used to output 700-750 nm long-wave red light.

[0052] Generally, the wavelength of the blue light chip is 453 nm ± 2 nm. In order to meet the requirement of the third LED channel light source in the present application to output 700-750 nm long-wave red light, a third fluorescent powder is added.

[0053] A platform superposition area is formed at 730 nm by the blue light chip 453 nm and the deep red fluorescent powder 763 nm emission peak, realizing 700-750 nm continuous coverage.

[0054] The mass ratio of the deep red fluorescent powder CaSiN3:Eu 2+ and the super-deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ is 75:25.

[0055] Further, the bottom layer of the glue layer of the packaging glue can be provided with a glue layer containing deep red fluorescent powder CaSiN3:Eu 2+ with a thickness of 60-80 μm, and the top layer can be provided with a glue layer containing super-deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ with a thickness of 40-60 μm.

[0056] Under the excitation of the 453 nm blue light chip, the deep red fluorescent powder CaSiN3:Eu 2+ emits red light through Eu2+ The 4f-5d energy level transition of the deep red phosphor generates a 763 nm main emission peak covering the 700-760 nm band; meanwhile, the crystal field splitting effect of the super deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The 4f-5d energy level transition of the deep red phosphor generates a 763 nm main emission peak covering the 700-760 nm band; meanwhile, the crystal field splitting effect of the super deep red phosphor Sr[Li2Al2O2N2]:Eu

[0057] The deep red phosphor emits a 763 nm main peak (covering 700-760 nm), and the super deep red phosphor emits a 780 nm secondary peak (covering 750-780 nm), and the two form a continuous spectrum by superposition in the 750-780 nm band.

[0058] The bottom deep red phosphor glue layer and the top super deep red phosphor glue layer have thicknesses of 60-80 μm and 40-60 μm, respectively, and the double-peak connection is realized through energy level matching.

[0059] The third LED channel light source is subjected to three-dimensional dynamic compensation, specifically including:

[0060] The current compensation amount ΔI is determined according to the driving current variation ΔI, the junction temperature variation ΔT, and the phosphor aging attenuation coefficient ΔC comp : ΔI comp = 0.2ΔI + 0.5ΔT - 0.3ΔC; the compensated current value I output = I 基准 + ΔI comp ; wherein ΔC is updated in real time through monthly spectral decay detection.

[0061] Step 102, collecting target region spectrum data through a four-node cross-distributed spectrum sensor;

[0062] Specifically, after the target region spectrum data is eliminated from environmental light interference, a current spectrum S i is obtained.

[0063] Step 103, calculating a deviation value ΔS of the current spectrum and a preset spectrum template based on a blackbody radiation curve;

[0064] Specifically, the deviation value is determined according to

[0065] wherein T i is a radiation intensity value of the preset spectrum template, S i is a radiation intensity value of the current spectrum, and N is a total sampling point number; is a sum of sampling points in the 400-430 nm band, is a sum of sampling points in the 431-699 nm band, ​Sum the sampling points of 700-780 nm waveband, and give 40%, 30% and 30% weights to the sampling points of 400-430 nm, 431-699 nm and 700-780 nm wavebands respectively, and obtain the deviation value corresponding to each waveband according to the weight of each waveband; N1 is the actual sampling point number of the 400-430 nm waveband, N2 is the actual sampling point number of the 431-699 nm waveband, and N3 is the actual sampling point number of the 700-780 nm waveband.

[0066] When ΔS>10%, the dynamic adjustment of step S4 is started.

[0067] Step 104, dynamically adjusting the three-channel light source according to the deviation value ΔS to realize the matching of the spectrum in the color temperature range of 1500K-12000K with the blackbody curve.

[0068] Specifically, when the target color temperature is >5700K: the duty cycle increment of the first LED channel light source = 0.8*ΔS <400 - 430> ; the current reduction amount of the third LED channel light source = 100*ΔS <700-750> ;

[0069] When it is detected that the target color temperature exceeds 5700K, the high color temperature reinforcement adjustment stage is entered. At this time, the duty cycle increment of the first LED channel (400-430 nm short wave purple light) has a 0.8 times linear relationship with ΔS<400-430>, and the short wave purple light proportion is increased (typical adjustment amplitude ±15%) to compensate for the lack of blue-violet waveband at high color temperature; at the same time, the driving current of the third LED channel (700-750 nm long wave red light) is reduced by 100*ΔS<700-750>, and the color coordinate deviation caused by excessive red light is inhibited (the measured red light intensity can be reduced by 30%-50%). This mode can keep the color deviation of Δuv<0.003 when the color temperature rises to 12000K.

[0070] When the target color temperature is <2700K: the first LED channel light source is turned off; the current increment of the third LED channel light source = 150*ΔS <700-750> ; the duty cycle of the second LED channel light source is reduced to 70%;

[0071] In the ultra-low color temperature scene below 2700K, the system first turns off the first LED channel (short wave purple light is completely cut off) to avoid the purple light component from destroying the continuity of the warm color spectrum; the third LED channel current is strengthened with a gain coefficient of 150*ΔS<700-750> to increase the red light output (the maximum increase amplitude is up to 90%), and the duty cycle of the second LED channel is forcibly reduced to 70% to increase the proportion of yellow and red light in the full waveband white light to more than 85%. This combination can stabilize the color temperature in the interval of 1500K-2700K, and ensure that the R9 color rendering index is ≥95.

[0072] When 2700K <= target color temperature <= 5700K: first LED channel light source duty cycle increment = 0.4 x AS <400 - 430> ; third LED channel light source current increment = 50 x AS <700-750> ; second LED channel light source duty cycle is maintained at 85%-95%.

[0073] The first LED channel duty cycle is fine-tuned with a gentle coefficient of 0.4 x AS <400-430>, the adjustment sensitivity is reduced by 50%, and the purple light mutation is avoided; the third LED channel current is compensated by 50 x AS <700-750>, the balance between red light and main spectrum is maintained; the second LED channel duty cycle is locked in the high-efficiency interval of 85%-95%, the continuity of the 431-699 nm band is guaranteed by maximizing the fluorescence powder excitation efficiency. This mode can achieve a color difference accuracy of DE <1 at the key color temperature point of 4000K, and completely eliminates the middle color deviation problem of the traditional scheme.

[0074] The present application realizes the precise matching of LED light source with blackbody curve in the super-wide color temperature range of 1500K-12000K through the synergy of three-channel spectrum structure design, blackbody radiation curve mapping and dynamic weighting adjustment algorithm, completely eliminates the spectrum cliff and color coordinate deviation of the traditional scheme, improves the color rendering index R9 from <=30 to >=95, and compresses the color deviation AuV to <0.003.

[0075] The above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

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2. The color temperature adjustment method based on matching with a black body radiation curve according to claim 1, characterized by, The configuration comprises three LED channel light sources, specifically including: a first LED channel light source: a first phosphor package adopting a GaN-on-SiC violet light chip and containing Sr5(PO4)3Cl:Ce 3+ , CaAlSiN3:Eu 2+ and YAG:Ce 3+ , outputting 400-430 nm short-wave violet light; Second LED channel light source: GaN-on-SiC violet chip and second phosphor package containing blue-violet powder Sr5(PO4)3Cl:Eu 2+ , green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow-spectrum red powder K3SiF7:Mn 4+ , cyan powder CaAlSiN3:Ce 3+ , output 400-700nm full-band white light; Third LED channel light source: blue chip and third fluorescent powder package containing deep red fluorescent powder CaSiN3:Eu 2+ , super deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ Output 700-750nm long-wave red light.

3. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, characterized by, The amount ratio of the blue powder Sr5(PO4)3Cl:Eu 2+ , the green powder CaAlSiN3:Ce 3+ , and the yellow powder YAG:Ce 3+ in the first LED channel light source is 62:33:

5.

4. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, characterized by, The first LED channel light source passes through the glue layer of the encapsulation glue, the bottom layer is provided with blue powder Sr5(PO4)3Cl:Eu 2+ , the middle layer is provided with cyan powder CaAlSiN3:Ce 3+ , and the top layer is provided with yellow powder YAG:Ce 3+ .

5. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, characterized by, The second LED channel light source is blue-violet powder Sr5(PO4)3Cl:Eu, green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow-spectrum red powder K3SiF7:Mn 4+ , cyan powder CaAlSiN3:Ce 3+ The mass ratio is 20:25:30:15:

10.

6. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, wherein, The bottom layer of the second LED channel light source through the encapsulation glue layer is provided with a glue layer containing blue-violet powder Sr5(PO4)3Cl:Eu and having a thickness of 40-60 μm, the middle layer is provided with a glue layer containing green powder β-SiAlON:Eu 2+ , yellow powder Lu3Al5O 12 :Ce 3+ and having a thickness of 50-70 μm, the transition layer is provided with a glue layer containing cyan powder CaAlSiN3:Ce 3+ and having a thickness of 20-30 μm, and the top layer is provided with a glue layer containing narrow-spectrum red powder K3SiF7:Mn 4+ and having a thickness of 30-40 μm.

7. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, characterized by, The third LED channel light source of deep red phosphor CaSiN3:Eu 2+ , super deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The mass ratio is 75:

25.

8. The color temperature adjustment method based on matching with a black body radiation curve according to claim 2, characterized by, The bottom layer of the third LED channel light source through the encapsulation glue layer is provided with deep red fluorescent powder CaSiN3:Eu 2+ The top layer is provided with super deep red fluorescent powder Sr[Li2Al2O2N2]:Eu, and the thickness of the glue layer is 60-80 μm. 2+ The top layer is provided with super deep red fluorescent powder Sr[Li2Al2O2N2]:Eu, and the thickness of the glue layer is 40-60 μm.

9. The method of adjusting color temperature based on matching with black body radiation curve according to claim 1, characterized in that, Also comprising three-dimensional dynamic compensation for the third LED channel light source, specifically comprising: determining current compensation amount ΔI according to driving current variation amount ΔI, junction temperature variation amount ΔT, and fluorescent powder aging attenuation coefficient ΔC comp : ΔI comp = 0.2ΔI + 0.5ΔT - 0.3ΔC; determining compensated current value I output = I 基准 + ΔI comp ; wherein ΔC is updated in real time through monthly spectral attenuation detection.

10. The method of adjusting color temperature based on matching with a black body radiation curve according to claim 1, wherein, The computing the deviation value AS of the current spectrum from the preset spectrum template based on the blackbody radiation curve specifically comprises: determining the deviation value, Wherein, T i is the radiation intensity value of the preset spectrum template, S i is the radiation intensity value of the current spectrum, and N is the total number of sampling points. is the sum of the sampling points in the 400-430nm waveband, is the sum of the sampling points in the 431-699nm waveband, is the sum of the sampling points in the 700-780nm waveband, the sampling points in the 400-430nm, 431-699nm and 700-780nm wavebands are respectively given a weight of 40%, 30% and 30%, and the deviation value corresponding to each waveband is obtained according to the weight of each waveband; N1 is the actual number of sampling points in the 400-430nm waveband, N2 is the actual number of sampling points in the 431-699nm waveband, and N3 is the actual number of sampling points in the 700-780nm waveband.

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