Multi-channel LED spectrum adjusting method and system

Abstract

The invention discloses a multi-channel LED spectrum adjusting method and system. The method comprises the steps that a light source containing three LED channels is configured; wherein the first LED channel light source outputs short-wave purple light of 400-430 nm, and a 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 long-wave red light of 700-780 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; determining a deviation value between the current spectrum and a preset template; and dynamically adjusting the three LED channel light sources according to the deviation value. The radiation intensity of short-wave purple light and long-wave red light can be remarkably improved, the color rendering index is optimized, and the high-precision illumination requirement is met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of LED, and particularly relates to a multi-channel LED spectrum adjusting method and system. BACKGROUND

[0002] The conventional LED light source is limited by the characteristics of semiconductor materials, and generally lacks short-wave violet light (400-430 nm) and long-wave red light (700-780 nm) spectrum. The radiation intensity of the commercially available LED in the wavelength band below 430 nm is less than 5% of that of sunlight, resulting in a significant decrease in the color rendering index (R9-R15) (R9≤30), which cannot meet the high-precision color restoration requirements (such as museum lighting, medical light source and the like).

[0003] The existing double-channel LED dimming scheme (such as 2700K+5700K mixing) has two defects:

[0004] Narrow color temperature coverage: only 2700K-5700K adjustment can be achieved, and the ultra-low color temperature (1500K) and ultra-high color temperature (12000K) requirements cannot be covered.

[0005] Color coordinate deviation: the mixed light color coordinates are easy to deviate from the blackbody radiation curve (CIE1931 color coordinate deviation Δuv≥0.01), especially at the 4000K middle color temperature, the actual measurement color deviation ΔE>5 (CIEDE2000 standard), causing the visible color deviation phenomenon. SUMMARY

[0006] Therefore, the main purpose of the present application is to provide a multi-channel LED spectrum adjusting method and system to solve the problems of conventional LED spectrum loss, low color rendering index and narrow dimming range.

[0007] To achieve the above purpose, the technical scheme of the present application is as follows:

[0008] A multi-channel LED spectrum adjusting method, the method comprising:

[0009] configuring a three-LED-channel light source;

[0010] The first LED channel light source outputs 400-430nm short-wave violet light, adopts a GaN-on-SiC violet light chip encapsulated by an encapsulating glue containing a first fluorescent powder, and the first fluorescent powder contains blue powder Sr5(PO4)3Cl:Ce 3+ , green powder CaAlSiN3:Eu 2+ and yellow powder YAG:Ce 3+ .

[0011] The second LED channel light source outputs 400-700nm full-band white light, adopts a violet light chip packaged by encapsulating glue containing second fluorescent powder, and the second fluorescent powder contains 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+ .

[0012] The third LED channel light source outputs 700-780nm long-wave red light, adopts a blue light chip packaged by encapsulating glue containing third fluorescent powder, and the third fluorescent powder contains deep red fluorescent powder CaSiN3:Eu 2+ and super-deep red fluorescent powder Sr[Li2Al2O2N2]:Eu 2+ .

[0013] The spectral data of the target region are collected by the four-node cross-distributed spectral sensor to obtain the current spectrum;

[0014] The deviation value of the current spectrum from the preset template is determined;

[0015] The three LED channel light sources are dynamically adjusted according to the deviation value.

[0016] Preferably, the use amount ratio of the blue powder Sr5(PO4)3Cl:Eu 2+ , cyan powder CaAlSiN3:Ce 3+ , and yellow powder YAG:Ce 3+ in the first LED channel light source is 62:33:5.

[0017] Preferably, in the glue layer of the encapsulating glue of the first LED channel light source, a glue layer containing the blue powder Sr5(PO4)3Cl:Eu 2+ with a thickness of 50-80μm is arranged at the bottom layer, a glue layer containing the cyan powder CaAlSiN3:Ce 3+ with a thickness of 30-50μm is arranged at the middle layer, and a glue layer containing the yellow powder YAG:Ce 3+ with a thickness of 10-20μm is arranged at the top layer.

[0018] Preferably, in the second LED channel light source, 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:Ce3+ The mass ratio is 20:25:30:15:10.

[0019] Preferably, the bottom layer of the packaging glue of the second LED channel light source is provided with a blue-purple powder Sr5(PO4)3Cl:Eu and a thickness of 40-60 μm, and the middle layer is provided with a green powder β-SiAlON:Eu. 2+ 、Yellow powder Lu3Al5O 12 :Ce 3 + The adhesive layer and transition layer with a thickness of 50-70μm are provided with blue powder CaAlSiN3:Ce 3+ The thickness of the adhesive layer is 20-30μm, and the top layer contains narrow spectrum red powder K3SiF7:Mn 4+ And the thickness of the adhesive layer is 30-40μm.

[0020] Preferably, the deep red phosphor CaSiN3:Eu in the third LED channel light source 2+ , ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The mass ratio is 75:25; the bottom layer of the third LED channel light source through the encapsulation glue layer contains deep red phosphor CaSiN3:Eu 2+ The top layer is 60-80 μm thick and contains ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ And the thickness of the adhesive layer is 40-60μm.

[0021] Preferably, it also includes three-dimensional dynamic compensation of the third LED channel light source, specifically including: determining the current compensation amount ΔI according to the driving current change ΔI, the junction temperature change ΔT, and the phosphor aging attenuation coefficient ΔC comp : Determine the compensation current value I output =I 基准 +ΔI comp .

[0022] Preferably, the determination of the deviation value between the current spectrum and the preset template specifically includes: Determine the deviation value, where, where, 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; Sum the sampling points in the 400-430nm band, Sum the sampling points of the 431-699nm band, Sum the sampling points of the 700-780nm waveband, and the sampling points of the 400-430nm, 431-699, 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.

[0023] Preferably, the three LED channel light sources are dynamically adjusted according to the deviation value, specifically comprising: according to the 400-430nm waveband deviation value ΔS <400-430> The duty cycle of the first LED channel is increased by 0.8*ΔS <400-430> ; the second LED channel is maintained at a constant current of 350mA;

[0024] The second LED channel is maintained at a constant current of 350mA;

[0025] According to the 700-780nm waveband deviation value S <700-780> The current of the third LED channel is increased by 120*ΔS <700-780> .

[0026] A multi-channel LED spectrum adjustment system, comprising:

[0027] A light source module comprising a first LED channel light source using a GaN-on-SiC violet light chip packaged with a packaging glue containing a first fluorescent powder, a second LED channel light source using a violet light chip packaged with a packaging glue containing a second fluorescent powder, and a third LED channel light source using a blue light chip packaged with a packaging glue containing a third fluorescent powder;

[0028] A control module connected to the spectrum sensor for multi-channel LED spectrum adjustment;

[0029] A spectrum sensor using a four-node cross distribution structure with a node spacing of 5-10cm arranged in a cross shape, for collecting spectrum data of a target area;

[0030] A control module connected to the spectrum sensor and the light source module, comprising a deviation calculation unit executing a deviation value algorithm and an adjustment control unit executing a dynamic adjustment logic, for realizing multi-channel LED spectrum adjustment.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] The present application improves the 400-430nm waveband radiation intensity to 85%±3% (measured value) of sunlight by three-channel LED light source combination design, and also increases the 700-780nm waveband red light ratio to 12%-18%, and increases the R9 value from ≤30 of the traditional scheme to ≥95, and Rf (fidelity index) ≥90; the present application can significantly improve the short-wave violet light and long-wave red light radiation intensity, optimize the color rendering index, and meet the high-precision lighting demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings described herein are used to further understand the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 A flowchart of a multi-channel LED spectrum adjustment method is provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, article, or device comprising the element.

[0038] The embodiment of the present invention provides a multi-channel LED spectrum adjustment method, such as Figure 1 As shown, the following steps are included:

[0039] Step 101: configure a light source including three LED channels;

[0040] Specifically, the first LED channel light source outputs 400-430nm short-wave violet light and adopts a GaN-on-SiC violet chip encapsulated by an encapsulation glue containing a first phosphor, wherein the first phosphor contains blue powder Sr5(PO4)3Cl:Ce3+ blue powder Sr5(PO4)3Cl:Eu 2+ and yellow powder YAG:Ce 3+ ;

[0041] Generally, the output 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 of 400-430nm in the present application, the first phosphor is added;

[0042] The emission spectrum of the blue powder Sr5(PO4)3Cl:Eu 2+ and the blue powder CaAlSiN3:Ce 3+ is superimposed to form a double-peak compensation structure (405nm+422nm) in the waveband of 400-430nm, so as to realize the radiation intensity >80% in the waveband; and the trace yellow powder YAG:Ce 3+ is further added to absorb yellow-green light of 450-550nm, so as to improve the attenuation rate of the waveband above 430nm by 3 times.

[0043] The use ratio of the blue powder Sr5(PO4)3Cl:Eu 2+ , the blue powder CaAlSiN3:Ce 3+ and the yellow powder YAG:Ce 3+ is 62:33:5.

[0044] Further, in the glue layer of the first LED channel light source, the bottom layer is provided with a glue layer containing the blue powder Sr5(PO4)3Cl:Eu 2+ with a thickness of 50-80μm, the middle layer is provided with a glue layer containing the blue powder CaAlSiN3:Ce 3+ with a thickness of 30-50μm, and the top layer is provided with a glue layer containing the yellow powder YAG:Ce 3+ with a thickness of 10-20μm.

[0045] The bottom layer is a blue powder glue layer (directly absorbing 395nm violet light)→the middle layer is a blue powder glue layer (secondary excitation to complete the waveband)→the top layer is a yellow powder glue layer (filtering stray light), and the thickness of each layer is 50-80μm, 30-50μm and 10-20μm respectively.

[0046] The first LED channel adopts a three-layer gradient packaging structure: the bottom layer is a blue powder (Sr5(PO4)3Cl:Eu 2+ directly absorbing 395nm violet light and emitting 405nm short-wave violet light; the middle layer is a blue powder (CaAlSiN3:Ce 3+ producing 422nm secondary peak through 5d-4f transition of Ce 3+ ; and the top layer is a trace yellow powder (YAG:Ce 3+ selectively absorbing 450-550nm stray light.

[0047] Further, a titanium dioxide (TiO2) reflective layer (50-80 nm thick) can be added to the surface of the violet light chip to reflect <400 nm deep ultraviolet light and reduce harmful radiation.

[0048] The second LED channel light source outputs 400-700 nm full-band white light, and a violet light chip is packaged with a packaging glue containing second fluorescent powder, the second fluorescent powder 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+ .

[0049] Generally, the wavelength of the violet light chip output is 395±2 nm. In order to meet the requirement of the second LED channel light source outputting 400-700 nm full-band white light in the present application, the second fluorescent powder is added.

[0050] The blue-violet powder Sr5(PO4)3Cl:Eu directly emits 410-430 nm short-wave violet light by exciting the violet light 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+ , constructing 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 fluorescent powder.

[0051] 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.

[0052] Furthermore, the bottom layer of the encapsulating glue layer can be provided with a glue layer containing blue-purple powder Sr5(PO4)3Cl:Eu, and the middle layer can be provided with a glue layer containing green powder β-SiAlON:Eu. 2+ , yellow powder Lu3Al5O 12 :Ce 3+ The adhesive layer and transition layer are set to include blue powder CaAlSiN3:Ce 3+ The glue layer and top layer are set to contain narrow spectrum red powder K3SiF7:Mn 4+ adhesive layer.

[0053] The bottom layer is blue-purple powder glue layer → the middle layer is green powder + yellow powder mixed glue layer → the transition layer is blue powder glue layer → the top layer is narrow spectrum red powder glue layer. The thickness of each layer is 40-60μm, 50-70μm, 20-30μm, and 30-40μm respectively, achieving seamless connection of the spectrum.

[0054] In the four-layer package of the second LED channel, the transition layer of blue powder (CaAlSiN3:Ce 3+ ) and top narrow spectrum red powder (K3SiF7:Mn 4+ ) forms a spectral bridge, eliminating the traditional blue-red gap in the 500-650nm band.

[0055] The third LED channel light source outputs 700-780nm long-wave red light and uses a blue light chip encapsulated by a packaging glue containing a third phosphor. The third phosphor contains a deep red phosphor CaSiN3:Eu 2+ , ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ ;

[0056] Generally speaking, the output wavelength of the blue light chip is 453nm±2nm. In order to meet the requirement that the third LED channel light source in this application outputs 700-780nm long-wave red light, a third phosphor is added;

[0057] By forming a platform overlapping area at 730nm with the emission peaks of the blue light chip 453nm and the deep red phosphor 763nm, continuous coverage of 700-780nm is achieved.

[0058] The deep red phosphor CaSiN3:Eu 2+ , ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The mass ratio is 75:25.

[0059] Furthermore, the bottom layer of the encapsulating glue layer can be provided with a deep red phosphor CaSiN3:Eu 2+ The top layer is 60-80 μm thick and contains ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+And the thickness of the glue layer is 40-60 μm.

[0060] Under the excitation of 453 nm blue chip, the deep red phosphor CaSiN3:Eu 2+ has a 763 nm main emission peak by 4f-5d energy level transition, covering the 700-760 nm band. 2+ The crystal field splitting effect of the super deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ generates a 780 nm secondary emission peak, and the two form a spectral overlap region in the 750-780 nm band, realizing seamless connection of double peaks through energy level matching.

[0061] 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 overlapping in the 750-780 nm band.

[0062] The bottom layer deep red phosphor glue layer→top layer super deep red phosphor glue layer, the thickness is 60-80 μm, 40-60 μm respectively, and the double peaks are connected through energy level matching.

[0063] The third LED channel light source is three-dimensionally dynamically compensated, specifically including:

[0064] The current compensation amount ΔI comp is determined according to the driving current variation ΔI, the junction temperature variation ΔT and the phosphor aging attenuation coefficient ΔC.

[0065] The compensated current value I output =I 基准 +ΔI comp .

[0066] By monitoring the junction temperature variation (△T) and the phosphor aging (△C) in real time, the driving current is automatically increased by 12-18% under high temperature working conditions (△T>15℃), and the radiation attenuation of the red light band (700-780 nm) is compensated.

[0067] Step 102, acquiring target area spectrum data by a four-node cross-distributed spectrum sensor;

[0068] Specifically, the target area spectrum data is obtained after eliminating the environmental light interference, and a current spectrum S i is obtained.

[0069] Step 103, determining the deviation value of the current spectrum and a preset template;

[0070] Specifically,

[0071] Wherein, Ti S is the radiation intensity value of the preset spectrum template i N is the total number of sampling points; S is the sum of the sampling points in the 400-430nm waveband, S is the sum of the sampling points in the 431-699nm waveband, S is the sum of the sampling points in the 700-780nm waveband, and the sampling points in the 400-430nm, 431-699nm and 700-780nm wavebands are respectively assigned weights of 40%, 30% and 30%, and the deviation value corresponding to each waveband is obtained according to the weight of each waveband.

[0072] When ΔS>10%, the dynamic adjustment of step S4 is started.

[0073] The sampling points in the 400-430nm and 700-780nm wavebands are respectively assigned weights of 40% and 30%, and the deviation value corresponding to each waveband is obtained according to the weight of each waveband;

[0074] Step 104, dynamically adjusting according to the deviation value.

[0075] Specifically, according to the 400-430nm waveband deviation value ΔS <400-430> The duty cycle of the first LED channel is increased by 0.8*ΔS <400-430> ; the second LED channel is maintained at a constant current of 350mA;

[0076] According to the 700-780nm waveband deviation value S <700-780> The current of the third LED channel is increased by 120*ΔS <700-780> ;

[0077] The second LED channel is maintained at a constant current of 350mA.

[0078] The present application improves the radiation intensity of the 400-430nm waveband to 85%±3% (measured value) of sunlight by the combination design of the three-channel LED light source, and also increases the proportion of red light in the 700-780nm waveband to 12%-18%, and also increases the R9 value from ≤30 of the traditional scheme to ≥95, and Rf (fidelity index) ≥90; the present application can significantly improve the radiation intensity of short-wave violet light and long-wave red light, optimize the color rendering index, and meet the high-precision lighting demand.

[0079] The present application also provides a multi-channel LED spectrum adjusting system, comprising:

[0080] The light source module comprises a first LED channel light source adopting a GaN-on-SiC purple light chip packaged by a packaging glue containing a first fluorescent powder, a second LED channel light source adopting a purple light chip packaged by a packaging glue containing a second fluorescent powder, and a third LED channel light source adopting a blue light chip packaged by a packaging glue containing a third fluorescent powder;

[0081] The control module is connected with the spectrum sensor and is used for adjusting the spectrum of the multi-channel LED;

[0082] The spectrum sensor adopts a four-node cross distribution structure, and the node spacing is 5-10 cm. The nodes are arranged in a cross shape, and are used for collecting spectrum data of a target area.

[0083] The control module is connected with the spectrum sensor and is used for adjusting the spectrum of the multi-channel LED;

[0084] Experimental data

[0085] 1. Experimental parameters

[0086] Test environment: temperature 25℃, humidity 50%, test distance 50cm;

[0087] Driving conditions: the first channel duty cycle is adjustable from 0 to 100%, the second channel is constant at 350mA, and the third channel current is adjustable from 0 to 500mA;

[0088] Spectrometer model: Ocean Optics HR4000, sampling interval 1nm.

[0089]

[0090] The experimental data show that the three-channel cooperative control technology of the present application has achieved major breakthroughs in spectrum integrity, color rendering performance and dynamic adjustment accuracy, and all indicators have reached the industry leading level.

[0091] The above only describes the preferred embodiments of the present application and is not used to limit the protection scope of the present application.

Claims

1. A multi-channel LED spectrum adjustment method, characterized in that: The method includes: The configuration includes three LED channel light sources; The first LED channel light source outputs 400-430nm short-wave violet light and adopts a GaN-on-SiC violet chip encapsulated by a packaging glue containing a first phosphor, wherein the first phosphor contains blue powder Sr5(PO4)3Cl:Ce 3+ 、Blue powder CaAlSiN3:Eu 2+ and yellow powder YAG:Ce 3+ ; The second LED channel light source outputs white light in the full band of 400-700nm and adopts a purple light chip encapsulated by a packaging glue containing a second phosphor. The second phosphor contains a blue-purple 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+ 、Blue powder CaAlSiN3:Ce 3+ ; The third LED channel light source outputs 700-780nm long-wave red light and uses a blue light chip encapsulated by a packaging glue containing a third phosphor. The third phosphor contains a deep red phosphor CaSiN3:Eu 2+ , ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ ; The spectral data of the target area is collected by a four-node cross-distributed spectral sensor to obtain the current spectrum; Determine the deviation value between the current spectrum and the preset template; The three LED channel light sources are dynamically adjusted according to the deviation value.

2. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The blue powder Sr5(PO4)3Cl:Eu in the first LED channel light source 2+ 、Blue powder CaAlSiN3:Ce 3+ 、YAG:Ce 3+ The dosage ratio is 62:33:

5.

3. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The bottom layer of the first LED channel light source is provided with a blue powder Sr5(PO4)3Cl:Eu through the encapsulation glue layer. 2+ The thickness of the adhesive layer is 50-80μm, and the middle layer is set to contain blue powder CaAlSiN3:Ce 3+ The thickness of the adhesive layer is 30-50μm, and the top layer is set to contain yellow powder YAG:Ce 3+ And the thickness of the adhesive layer is 10-20μm.

4. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The blue-purple powder Sr5(PO4)3Cl:Eu and the green powder β-SiAlON:Eu in the second LED channel light source 2+ , yellow powder Lu3Al5O 12 :Ce 3+ , narrow spectrum red powder K3SiF7:Mn 4+ 、Blue powder CaAlSiN3:Ce 3+ The mass ratio is 20:25:30:15:

10.

5. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The second LED channel light source is provided with a bottom layer of a packaging glue layer comprising a blue-purple powder Sr5(PO4)3Cl:Eu and a thickness of 40-60 μm, and a middle layer comprising a green powder β-SiAlON:Eu. 2+ 、Yellow powder Lu3Al5O 12 :Ce 3+ The adhesive layer and transition layer with a thickness of 50-70μm are provided with blue powder CaAlSiN3:Ce 3+ The thickness of the adhesive layer is 20-30μm, and the top layer contains narrow spectrum red powder K3SiF7:Mn 4+ And the thickness of the adhesive layer is 30-40μm.

6. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The deep red phosphor CaSiN3:Eu in the third LED channel light source 2+ , ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ The mass ratio is 75:25; the bottom layer of the third LED channel light source through the encapsulation glue layer contains deep red phosphor CaSiN3:Eu 2+ The top layer is 60-80 μm thick and contains ultra-deep red phosphor Sr[Li2Al2O2N2]:Eu 2+ And the thickness of the adhesive layer is 40-60μm.

7. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The third LED channel light source is further comprised of three-dimensional dynamic compensation, specifically comprising: determining the current compensation value ΔI according to the driving current variation ΔI, the junction temperature variation ΔT, and the phosphor aging attenuation coefficient ΔC. comp : Determine the compensation current value I output =I 基准 +ΔI comp .

8. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The deviation value between the current spectrum and the preset template is determined, Specifically include: Determine the deviation value, Among them, 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; Sum the sampling points in the 400-430nm band, Sum the sampling points of the 431-699nm band, The sampling points of the 700-780 nm band are summed, and the sums of the sampling points of the 400-430 nm, 431-699 nm, and 700-780 nm bands are assigned weights of 40%, 30%, and 30%, respectively. The deviation value corresponding to each band is obtained according to the weight of the band.

9. The multi-channel LED spectrum adjustment method according to claim 1, characterized in that: The dynamic adjustment of the three LED channel light sources according to the deviation value specifically includes: according to the 400-430nm band deviation value ΔS <400-430> Duty cycle increase of the first LED channel = 0.8×ΔS <400-430> ; Maintain a constant current of 350mA for the second LED channel; Maintain a constant current of 350mA for the second LED channel; According to the 700-780nm band deviation value S <700-780> Increase the current increment of the third LED channel = 120×ΔS <700-780> .

10. A multi-channel LED spectrum adjustment system, characterized in that: include: The light source module includes a first LED channel light source using a GaN-on-SiC purple light chip encapsulated by an encapsulation compound containing a first phosphor, a second LED channel light source using a purple light chip encapsulated by an encapsulation compound containing a second phosphor, and a third LED channel light source using a blue light chip encapsulated by an encapsulation compound containing a third phosphor; The control module is connected to the spectrum sensor for adjusting the spectrum of multi-channel LEDs; The spectral sensor adopts a four-node cross distribution structure with a node spacing of 5-10 cm and an orthogonal cross arrangement to collect spectral data of the target area; The control module is connected to the spectrum sensor and the light source module, and includes a deviation calculation unit that executes the deviation value algorithm of claim 8 and an adjustment control unit that executes the dynamic adjustment logic of claim 9, so as to realize multi-channel LED spectrum adjustment.

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