Education lighting LED and preparation method therefor

Abstract

The present invention belongs to the technical field of LEDs, and relates in particular to an education lighting LED and a preparation method therefor. The education lighting LED comprises a plurality of LED chips and a support; the plurality of LED chips include a first LED chip with a wavelength of 440-445 nm, a second LED chip with a wavelength of 450-455 nm, and a third LED chip with a wavelength of 465-470 nm; the plurality of LED chips are coated with fluorescent silicone, and the fluorescent silicone is a mixture of a blue powder, a green powder, a red powder, and an MGF fluorescent powder combined with transparent silicone; the emission wavelength of the blue powder is 490-505 nm, and a component of the blue powder is Lu3Al5O12:Ce3+; the emission wavelength of the green powder is 530-540 nm, and a component of the green powder is Lu3Al5O12:Ce3+; the emission wavelength of the red powder is 650-660 nm, and a component of the red powder is CaAlSiN3:Eu; a component of the MGF fluorescent powder is Mg4GeO5.5F2:Mn4+, the excitation peak of the MGF fluorescent powder is 400-500 nm, and the emission peak thereof has multiple peaks and the peaks are within the range of 685-695 nm. The present invention has high color rendering and high SSI spectral similarity, and has S / P ratio and M / P ratio parameters which are higher than the spectrum of sunlight having the same color temperature; and the invention is used in the field of healthy lighting, providing sensory comfort and a visual experience of clear vision and soft lighting.

Description

Educational lighting LED and its preparation method Technical Field

[0001] The present invention relates to the technical field of LEDs, in particular to an educational lighting LED and a preparation method thereof. Background Art

[0002] A bright lighting environment is the foundation of visual and learning conditions in classrooms, and a comfortable lighting scene is crucial for promoting efficient and focused learning. A healthy classroom lighting environment also helps improve student concentration and psychological well-being. Educational lighting fixtures must possess the following features: 1. Reflective lighting technology, resulting in a "light without lamp" lighting effect. 2. Excellent color reproduction and RG0 to mitigate the harmful effects of blue light. 3. Uniform, soft, comfortable lighting, without visible flicker, and anti-glare. 4. Low power consumption, long lifespan, excellent stability, and high reliability. 5. Convenient installation, efficient replacement, and quick installation.

[0003] Currently, the mainstream spectrum of educational lighting LEDs is a dual-wave 4000K + 690nm combination spectrum (Figure 1) or a triple-wave 4000K + 690nm combination spectrum (Figure 2). This leads to problems with spot processing, resulting in wasteful lamp structure design and increased costs. Summary of the Invention

[0004] The purpose of the present invention is to provide an educational lighting LED.

[0005] Another object of the present invention is to provide a method for preparing an educational lighting LED.

[0006] The present invention adopts the following technical solutions to solve the above technical problems:

[0007] An educational lighting LED, comprising an LED chip and a bracket; the LED chips include a first LED chip with a wavelength of 440-445 nm, a second LED chip with a wavelength of 450-455 nm, and a third LED chip with a wavelength of 465-470 nm; the LED chips are coated with fluorescent glue, which is a mixture of blue powder, green powder, red powder, MGF phosphor powder, and transparent silica gel;

[0008] The emission wavelength of the blue powder is 490-505 nm, and the composition of the blue powder is Lu3Al5O 12 :Ce 3+ The emission wavelength of the green powder is 530-540nm, and the composition of the green powder is Lu3Al5O 12 :Ce 3+The emission wavelength of the red powder is 650-660nm, and the composition of the red powder is CaAlSiN3:Eu; the composition of the MGF phosphor is Mg4GeO5.5F2:Mn 4+ The excitation peak of the MGF phosphor is 400-500 nm, and the emission peak is multi-peak with the peak at 685-695 nm.

[0009] Preferably, the ratio of the transparent silica gel, the blue powder, the green powder, the red powder and the MGF phosphor is 3: (0.4-0.5): (1.3-1.8): (0.13-0.18): (1.0-1.5).

[0010] Preferably, the highest excitation peak of the MGF phosphor is 450-460 nm.

[0011] Preferably, the first LED chip, the second LED chip and the third LED chip are all arranged in a bracket, and the first LED chip, the second LED chip and the third LED chip are connected in series with the positive and negative poles of the bracket.

[0012] Preferably, the educational lighting LED of the present invention has an area ratio of the chips used as follows: first LED chip: second LED chip: third LED chip = 1: (0.9-1.1): (1.2-1.6).

[0013] Preferably, the spectral energy ratio of the packaged finished product of the educational lighting LED of the present invention is: e (350-439nm): Ф e (440-469nm): Ф e (470-499nm): Ф e (500-599nm): Ф e (600-699nm): Ф e (700-1000nm)=(3.3%-3.7%): (6.3%-6.7%): (8%-8.3%): (32.8%-33.2%): (39.2%-39.6%): (9.2%-9.6%).

[0014] Preferably, the relative spectral heights of the packaged finished product of the educational lighting LED of the present invention are as follows: 350-470nm≤0.4, 500-550nm≥0.45, 600-650nm≥0.55, 650-700nm≥0.6, multiple peaks appear at 650-700nm and the peak wavelength is at 685-695nm.

[0015] Preferably, after the educational lighting LED of the present invention is packaged into a finished product, the white light LED color quality requirements are: the LED meets Ra>98, R1-R15>90, TM-30-18, Rg>98, Rf>95, S / P ratio>1.88, M / Pratio>0.78, which is greater than sunlight with the same color temperature.

[0016] Preferably, the chromaticity width of the white light LED packaged as an educational lighting LED of the present invention is controlled within a third-order MacAdam ellipse, meeting a 4000K sunlight spectral similarity SSI (350-830nm) coefficient greater than 88%, and a 4000K sunlight spectral similarity SSI (430-690nm) coefficient greater than 97%. The spectral cosine similarity coefficient (SCS (430-690)) with 4000K sunlight is greater than 90%.

[0017] The spectral cosine similarity (SCS) measures the similarity between two vectors by the cosine value of the angle between them. The more similar the two vectors are, the smaller the angle is, and the closer the cosine value is to 1. In n-dimensional space, for vector A = (a1, a2, ..., a n ), B=(b1, b2, …, b n ), its cosine is:

[0018] Among them, a i It represents the normalized result of the absolute spectrum of artificial light source at different wavelengths at a wavelength of 560nm; b i It represents the normalized result of the relative spectral power distribution of daylight D at a wavelength of 560nm at the corresponding wavelength of artificial light source.

[0019] Selection of wavelength range of target spectrum: Considering that the spectral energy in the 380nm-430nm and 680nm-780nm bands accounts for a relatively small proportion, the target spectrum wavelength range for calculating the similarity in the present invention is 430-690nm.

[0020] The present invention also provides a method for preparing an educational lighting LED, which comprises the following steps:

[0021] S100: Place the LED chip in the bowl of the bracket. Use a die bonder to bond the chip to the bracket using insulating glue or silver glue. After bonding, bake in an oven at 150-160°C for 2h±10min to completely fix the chip on the bracket.

[0022] S200: After the die bonding process is completed, the positive and negative electrodes of the bracket are connected using wire bonding technology using a gold wire bonding machine. The chips in the bracket's cups are connected in series.

[0023] S300: Prepare a 4000K fluorescent glue solution, which is a mixture of transparent silica gel, blue powder with an emission wavelength of 490-505nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 650-660nm, and MGF phosphor with an emission wavelength of 685-695nm, so that the light color meets the color parameter 403 requirements;

[0024] S400: Pour the 4000K fluorescent glue solution prepared in S300 into the glue barrel of the glue dispensing machine. After the glue and bubbles are removed, dispense the 4000K fluorescent glue solution into the bowl of the bracket according to the color parameter requirements. After dispensing, bake at 80℃ for 0.5h±5min, and then bake at 160℃ for 4h±10min.

[0025] S500: After the glue-dispensing and baking, the educational lighting LED products are threshed and then spectroscopically tested according to the given color parameters using a spectrophotometer.

[0026] Compared with the prior art, the educational lighting LED and its preparation method of the present invention have the following beneficial effects:

[0027] 1. The educational lighting LED of the present invention meets the requirements of high color rendering index and high SSI spectral similarity. The S / P ratio and M / P ratio parameters are both higher than the spectrum of sunlight with the same color temperature. When applied to the field of healthy lighting, it can provide people with a comfortable visual experience with clear vision and soft light beauty.

[0028] 2. The educational lighting LED of the present invention has an SSI (350-830nm) > 88%, an SSI (430-690nm) > 97%, and an SCS (430-690nm) > 90%, and has excellent spectral similarity parameters, restoring the color of natural light, allowing people to experience a natural sunlight bath.

[0029] 3. The packaged finished product of the educational lighting LED of the present invention has a relative spectral intensity of ≥0.6 at 650-700nm. Repeated low-intensity irradiation on the retina can continuously promote retinal choroidal circulation, improve scleral hypoxia, and thus continuously control axial length growth, making it easier for the human eye to see objects, solving visual fatigue, and preventing the occurrence of myopia.

[0030] 4. The packaged finished product of the educational lighting LED of the present invention has a relative spectral intensity of ≤0.4 at 350-470nm, which meets the blue light exemption RG0 standard and has a healthier eye protection spectrum. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a dual-wave 4000K+690nm combined spectrum diagram of existing educational lighting LEDs.

[0032] Figure 2 is a three-wave 4000K+690nm combined spectrum diagram of existing educational lighting LEDs.

[0033] FIG3 is a schematic structural diagram of an educational lighting LED according to the present invention.

[0034] FIG4 is a cross-sectional view of an educational lighting LED according to the present invention.

[0035] FIG5 is a graph showing the luminous spectrum of the finished product of the educational lighting LED package of the present invention.

[0036] 6 and 7 are diagrams showing the calculated similarity between the educational lighting LED package product of the present invention and the 4000KSSI spectrum.

[0037] FIG8 is a SCS spectrum similarity calculation diagram of the educational lighting LED package product of the present invention.

[0038] FIG9 is a spectrum test report of the educational lighting LED package product of the present invention.

[0039] FIG10 is a bin diagram showing the chromaticity landing point requirements of the finished product of the educational lighting LED package of the present invention.

[0040] FIG11 is an excitation and emission spectrum diagram of the MGF phosphor of the finished educational lighting LED package of the present invention.

[0041] Reference numerals: 10 - pin 11 - first LED chip 12 - second LED chip 13 - third LED chip 14 - bowl 15 - bracket 16 - fluorescent glue. DETAILED DESCRIPTION

[0042] The technical solutions of the present invention are further described in detail below with reference to Figures 3-11. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Although this specification describes the embodiments, not each embodiment contains only one independent technical solution. This description is provided for clarity only. Those skilled in the art should consider this specification as a whole. The embodiments can also be appropriately combined to form other embodiments that are understandable to those skilled in the art.

[0043] As shown in Figures 3 and 4, an educational lighting LED provided by an embodiment of the present invention includes multiple LED chips and a bracket 15; the multiple LED chips include a first LED chip 11 with a wavelength of 440-445nm, a second LED chip 12 with a wavelength of 450-455nm, and a third LED chip 13 with a wavelength of 465-470nm; the LED chips are coated with a fluorescent glue 16, which is a mixture of blue powder, green powder, red powder, MGF phosphor and transparent silica gel; wherein: the blue powder has an emission wavelength of 490-505nm, and the blue powder component is Lu3Al5O 12 :Ce 3+ Lu powder has the advantages of high thermal stability, resistance to hot and humid environment, and high internal quantum efficiency (>99%); the emission wavelength of green powder is 530-540nm, and the green powder composition is Lu3Al5O 12 :Ce 3+ Lu powder has high thermal stability, resistance to hot and humid environments, and high internal quantum efficiency (>99%); the red powder emission wavelength is 650-660nm, and the red powder composition is CaAlSiN3:Eu. The 1113 system phosphor has high thermal stability, resistance to hot and humid environments, and high internal quantum efficiency (>97%); the MGF phosphor composition is Mg4GeO5.5F2:Mn 4+ As shown in FIG11 , the excitation peak of the MGF phosphor is 400-500 nm, the emission peak is multi-peak and the peak is at 685-695 nm, it has the advantages of high thermal stability, resistance to hot and humid environment, relative internal quantum efficiency (>70%), and long life.

[0044] In this embodiment, the ratio of the transparent silica gel, the blue powder, the green powder, the red powder, and the MGF phosphor powder is 3:(0.4-0.5):(1.3-1.8):(0.13-0.18):(1.0-1.5). Specifically, the ratio of the transparent silica gel, the blue powder, the green powder, the red powder, and the MGF phosphor powder is 3:0.5:1.3:0.18:1.2, 3:0.4:1.3:0.16:1.3, 3:0.4:1.5:0.15:1.1, 3:0.4:1.8:0.13:1.5, 3:0.5:1.4:0.14:1.2, 3:0.5:1.7:0.16:1.0, 3:0.5:1.6:0.17:1.5, 3:0.5:1.8:0.14:1.1, etc.

[0045] The highest excitation peak of the MGF phosphor described in this embodiment is 450-460 nm.

[0046] In this embodiment, the first LED chip 11, the second LED chip 12, and the third LED chip 13 are disposed within a bracket 15, and are connected in series to the positive and negative electrodes of the bracket 15. Specifically, the first LED chip 11, the second LED chip 12, and the third LED chip 13 are disposed within a bowl 14 of the bracket 15, and are connected in series to the positive and negative pins 10 of the bracket 15 using gold wire bonding technology.

[0047] The area ratio of the chips used in the educational lighting LEDs of this embodiment is: first LED chip 11: second LED chip 12: third LED chip 13 = 1:(0.9-1.1):(1.2-1.6). Specifically, the area ratio of the first LED chip 11: second LED chip 12: third LED chip 13 is 1:0.9:1.2, 1:1.1:1.6, 1:1:1.5, 1:1:1.3, 1:1.1:1.4, 1:0.9:1.6, 1:1:1.4, and so on.

[0048] The spectral energy ratio of the finished product of the educational lighting LED package of this embodiment is: φe (350-439nm): φe (440-469nm): φe (470-499nm): φe (500-599nm): φe (600-699nm): φe (700-1000nm) = (3.3%-3.7%): (6.3%-6.7%): (8%-8.3%): (32.8%-33.2%): (39.2%-39.6%): (9.2%-9.6%). As a preferred embodiment of this embodiment, the luminous spectrum distribution of the finished product of the educational lighting LED package is shown in Table 1.

[0049] Table 1: Light spectral distribution of finished educational lighting LED packages.

[0050] The relative spectral heights of the finished educational lighting LED package in this embodiment are as follows: 350-470nm ≤ 0.4, 500-550nm ≥ 0.45, 600-650nm ≥ 0.55, and 650-700nm ≥ 0.6. Multiple peaks appear at 650-700nm, with the peak wavelength between 685-695nm. Advantages include good spectral continuity and high cyan light richness, which contribute to improved Ra, S / P ratio, and M / P ratio parameters. This provides a comfortable visual experience with clear vision and soft, beautiful light.

[0051] The finished educational lighting LED package of this invention has a relative spectral intensity of ≥0.6 at 650-700nm. Repeated low-intensity illumination of the retina can continuously promote retinal and choroidal circulation, improve scleral hypoxia, and thus continuously control axial length growth, making vision easier, alleviating visual fatigue, and preventing myopia. The finished package has a relative spectral intensity of ≤0.4 at 350-470nm, meeting the blue light exemption RG0 standard, providing a healthier eye-protection spectrum.

[0052] After the educational lighting LEDs in this embodiment are packaged into finished products, the color quality requirements for the white light LEDs are as follows: the LEDs must meet Ra>98, R1-R15>90, TM-30-18, Rg>98, Rf>95, S / Pratio>1.88, and M / P ratio>0.78, which is greater than sunlight at the same color temperature. The color temperature must meet specified chromaticity standard coordinates, and the chromaticity width of the packaged white light LEDs must be within a 3rd-order MacAdam ellipse. The SSI (350-830) coefficient of similarity to sunlight at 4000K must be greater than 88%, and the SSI (430-690) coefficient of similarity to sunlight at 4000K must be greater than 97%. The spectral cosine similarity coefficient (SCS (430-690)) of the packaged white light LEDs must be greater than 90%.

[0053] Table 2 Comparison of the S / P ratio and M / P ratio of the educational lighting LED package product of the present invention and sunlight 4000K.

[0054] As can be seen from Table 2, the educational lighting LEDs of the present invention have both S / P ratio and M / P ratio parameters that are higher than the spectrum of sunlight at the same color temperature, providing sensory comfort, clear vision, and a soft, beautiful visual experience. The SSI (350-830nm) is greater than 88%, the SSI (430-690nm) is greater than 97%, and the SCS (430-690nm) is greater than 90%, demonstrating excellent spectral similarity parameters. This reproduces the color of natural light, giving people a natural, sun-bathed experience.

[0055] The present invention also provides a method for preparing an educational lighting LED, comprising the following steps:

[0056] S100: Place the LED chip in the bowl 14 of the bracket 15. Use a die bonder to bond the chip to the bracket 15 using insulating glue or silver glue. After bonding, bake in an oven at 150-160°C for 2h±10min to completely fix the chip to the bracket 15.

[0057] S200: After the die bonding is completed, the positive and negative electrodes of the bracket 15 are connected by wire bonding technology using a gold wire bonding machine, and the chips in the bowl 14 of the bracket 15 are connected in series.

[0058] S300: Prepare 4000K fluorescent glue solution, which is transparent silica gel, blue powder with an emission wavelength of 490-505nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 650-660nm, and MGF phosphor with an emission wavelength of 685-695nm in a ratio of 3:0.5:1.3:0.18:1.2 or 3:0.4:1.3:0.16:1. The mixture is prepared in a ratio of 3 or 3:0.4:1.5:0.15:1.1 or 3:0.4:1.8:0.13:1.5 or 3:0.5:1.4:0.14:1.2 or 3:0.5:1.7:0.16:1.0 or 3:0.5:1.6:0.17:1.5 or 3:0.5:1.8:0.14:1.1 so that the light color meets the requirements of color parameter 403;

[0059] S400: Pour the 4000K fluorescent glue solution prepared in S300 into the glue barrel of the glue dispensing machine. After the glue and bubbles are removed, dispense the 4000K fluorescent glue solution into the bowl 14 of the bracket 15 according to the color parameter requirements. After dispensing, bake at 80℃ for 0.5h±5min, and then bake at 160℃ for 4h±10min.

[0060] S500: After the LED product has been glued and baked, it is degranulated and then spectroscopically tested according to given color parameters using a spectrophotometer. The spectroscopic parameters of the finished product of the educational lighting LED package of the present invention are shown in Table 3.

[0061] Table 3 Spectral parameters of the finished product of educational lighting LED package of the present invention.

[0062] FIG9 is a test report of the educational lighting LED of this embodiment, from which it can be concluded that:

[0063] Color parameters:

[0064] Chromaticity coordinates (2 degrees): x = 0.3813, y = 0.3830 / u' = 0.2232, v' = 0.5044, duv = 2.600e-003;

[0065] Correlated color temperature: Tc = 4022K, dominant wavelength: λd = 577.8nm, color purity: Purity = 25.0%;

[0066] Color ratio: R = 20.1%, G = 74.7%, B = 5.2%, peak wavelength: λp = 690.2nm, half width: Δλd = 243.2nm;

[0067] Color rendering index: Ra=98.6, AvgR=98.3;

[0068] R1=98.59, R2=98.75, R3=99.26, R4=98.33, R5=98.63;

[0069] R6=97.85, R7=98.32, R8=98.80, R9=98.07, R10=97.57;

[0070] R11=97.40, R12=96.04, R13=98.33, R14=99.25, R15=99.03;

[0071] TM30 parameters: Rf=97.5, Rg:99.9;

[0072] TMCI parameter: TLCI-2012=99;

[0073] Photometric parameters:

[0074] Luminous flux: Φ = 111.0 lm, luminous efficacy: 124.42 lm / W Φe = 411.4 mW, photoelectric efficiency = 46.137%;

[0075] Photon (μmol / s): 3.400e-001 [400-500nm] 6.883e-001 [500-600nm] 7.95e-001 [600-700nm];

[0076] Photon = 1.980e+000umol / s, fluorescence blue ratio = 4.45; fluorescence efficacy = 3.743e-001;

[0077] Photosynthetic radiation parameters (400-700 nm): photosynthetic photon flux PPF: 1.8222 μmol / s;

[0078] Photosynthetically active radiation flux PRF: 385.55mW;

[0079] Photosynthetic photon flux efficiency (PPF): 2.04 μmol / s / W;

[0080] External quantum efficiency EQE (%): 191.04;

[0081] Electrical parameters:

[0082] Forward voltage VF = 8.917 V, forward current IF = 100.0 mA, power P = 8981.8 mW;

[0083] Reverse current IR = 0 uA (reverse voltage VR = 5.018 V).

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An educational lighting LED, comprising an LED chip and a bracket; characterized in that: The LED chips include a first LED chip with a wavelength of 440-445nm, a second LED chip with a wavelength of 450-455nm, and a third LED chip with a wavelength of 465-470nm; the LED chips are coated with fluorescent glue, which is a mixture of blue powder, green powder, red powder, MGF fluorescent powder and transparent silica gel; Wherein: the emission wavelength of the blue powder is 490-505nm, and the composition of the blue powder is Lu3Al5O 12 :Ce 3+ The emission wavelength of the green powder is 530-540nm, and the composition of the green powder is Lu3Al5O 12 :Ce 3+ The emission wavelength of the red powder is 650-660nm, and the composition of the red powder is CaAlSiN3:Eu; the composition of the MGF phosphor is Mg4GeO5.5F2:Mn 4+ The excitation peak of the MGF phosphor is 400-500nm, and the emission peak is multi-peak with the peak at 685-695nm; The ratio of the transparent silica gel, the blue powder, the green powder, the red powder and the MGF phosphor is 3: (0.4-0.5): (1.3-1.8): (0.13-0.18): (1.0-1.5).

2. The educational lighting LED according to claim 1, characterized in that: The highest excitation peak of the MGF phosphor is 450-460nm.

3. The educational lighting LED according to claim 1, characterized in that: The first LED chip, the second LED chip and the third LED chip are all arranged in a bracket, and the first LED chip, the second LED chip and the third LED chip are connected in series with the positive and negative electrodes of the bracket.

4. The educational lighting LED according to claim 1, characterized in that: The area ratio of the chips used is: first LED chip: second LED chip: third LED chip = 1: (0.9-1.1): (1.2-1.6).

5. The educational lighting LED according to claim 1, characterized in that: The spectral energy ratio of the packaged finished product is: e (350-439nm): Ф e (440-469nm): Ф e (470-499nm): Ф e (500-599nm): Ф e (600-699nm): Ф e (700-1000nm)=(3.3%-3.7%): (6.3%-6.7%): (8%-8.3%): (32.8%-33.2%): (39.2%-39.6%): (9.2%-9.6%).

6. The educational lighting LED according to claim 1, characterized in that: The relative spectral heights of the packaged finished products are as follows: 350-470nm≤0.4, 500-550nm≥0.45, 600-650nm≥0.55, 650-700nm≥0.6, multiple peaks appear at 650-700nm and the peak wavelength is at 685-695nm.

7. The educational lighting LED according to claim 1, characterized in that: After being packaged into finished products, the color quality requirements of white light LEDs are: LEDs meet Ra>98, R1-R15>90, TM-30-18, Rg>98, Rf>95, S / P ratio>1.88, M / P ratio>0.78, and both S / P ratio and M / P ratio are greater than sunlight with the same color temperature.

8. The educational lighting LED according to claim 1, characterized in that: The chromaticity width capacity of the packaged white light LED is controlled within the third-order MacAdam ellipse, which satisfies the LED packaging with a 4000K sunlight spectrum similarity SSI (350-830nm) coefficient of >88% and a 4000K sunlight spectrum similarity SSI (430-690nm) coefficient of >97%.

9. A method for preparing an educational lighting LED according to any one of claims 1 to 8, characterized in that: The method comprises the following preparation steps: S100: Place the LED chip in the bowl of the bracket, and fix the chip on the bracket with a die-bonding machine through insulating glue or silver glue. After the die-bonding is completed, bake it in an oven at 150-160℃ for 2h±10min to completely fix the chip on the bracket; S200: After the die bonding is done, the positive and negative electrodes of the bracket are connected by wire bonding technology through a gold wire bonding machine, and the chips in the bowl of the bracket are connected in series; S300: Prepare 4000K fluorescent glue solution, which is a mixture of transparent silica gel, blue powder with an emission wavelength of 490-505nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 650-660nm, and MGF phosphor with an emission wavelength of 685-695nm, so that the light color meets the requirements of color parameter 403; S400: Pour the 4000K fluorescent glue solution prepared in S300 into the glue barrel of the glue dispensing machine. After the glue and bubbles are removed, dispense the 4000K fluorescent glue solution into the bowl of the bracket according to the color parameter requirements. After dispensing, bake at 80℃ for 0.5h±5min, and then bake at 160℃ for 4h±10min. S500: After the glue dispensing and baking, the educational lighting LED products are threshed and then spectroscopically analyzed according to the given color parameters using a spectrophotometer.

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