Solar Photovoltaic Device Simulator LED Light Source and Its Preparation Method

Abstract

The present invention belongs to the technical field of LED, and particularly relates to an LED light source for a solar photovoltaic device simulator and a preparation method thereof. The LED light source for a solar photovoltaic device simulator includes a plurality of LED wafers, a bracket, silica gel, and fluorescent glue. The bracket has a bowl cup and positive and negative electrodes. The plurality of LED wafers are all arranged in the bowl cup, and each LED wafer is connected in series with the positive and negative electrodes through gold wire bonding. The fluorescent glue is coated on each LED wafer; the plurality of LED wafers include a first LED wafer of 310 - 315 nm, a second LED wafer of 350 - 370 nm, a third LED wafer of 400 - 410 nm, a fourth LED wafer of 440 - 445 nm, a fifth LED wafer of 450 - 455 nm, a sixth LED wafer of 465 - 470 nm, and a seventh LED wafer of 475 - 485 nm. The present invention can be safely and effectively applied to a solar photovoltaic device simulator, improving the output utilization rate of photovoltaic products.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, in particular to an LED light source for a solar photovoltaic device simulator and a preparation method thereof. Background Art

[0002] Currently, the mainstream form of the light source of a solar photovoltaic (PV) device simulator is a combination of more than a dozen light sources. Such a light source of a solar photovoltaic device simulator will have problems in spot processing, resulting in a waste of the lamp structure design and thus increasing costs. Moreover, this combination will also have unstable spectra, resulting in an inability to accurately simulate the spectrum of sunlight AM1.5G. Summary of the Invention

[0003] The purpose of the present invention is to provide an LED light source for a solar photovoltaic device simulator and a preparation method thereof, which can at least solve one of the problems existing in the above-mentioned prior art, so as to achieve high color rendering, high SSI spectral similarity, S / P ratio and M / P ratio parameters higher than those of sunlight of the same color temperature, and the simulated sunlight AM1.5G spectrum reaches the A+ level standard, and can be applied to fields such as solar photovoltaic device simulators and healthy lighting.

[0004] The present invention adopts the following technical solutions to solve the above technical problems: providing an LED light source for a solar photovoltaic device simulator, including a plurality of LED wafers, a bracket, silica gel and fluorescent glue, wherein the bracket has a bowl cup and positive and negative electrodes, and a plurality of the LED wafers are all arranged in the bowl cup and are connected in series with the positive and negative electrodes through wire bonding, and the fluorescent glue coats each of the LED wafers;

[0005] Among them, the plurality of LED wafers include a first LED wafer with a peak wavelength of 310 - 315 nm, a second LED wafer with a peak wavelength of 350 - 370 nm, a third LED wafer with a peak wavelength of 400 - 410 nm, a fourth LED wafer with a main wavelength of 440 - 445 nm, a fifth LED wafer with a main wavelength of 450 - 455 nm, a sixth LED wafer with a main wavelength of 465 - 470 nm, and a seventh LED wafer with a main wavelength of 475 - 485 nm;

[0006] Among them, the fluorescent glue includes blue powder, green powder, red powder and infrared fluorescent powder, and makes the LED light color quality formed in the bowl cup meet Ra>98, R1-R15>90, Rg>98, Rf>95, the S / P ratio and M / P ratio are higher than that of sunlight with the same color temperature, the color temperature meets the specified chromaticity standard 603 coordinates, the chromaticity coordinates meet the 3rd order color tolerance chromaticity standard, the similarity coefficient SSI(300-830) with sunlight at 6000K>93%, the similarity coefficient SSI(350-830) with sunlight at 6000K>93%, and meets the IEC-60904-2020 standard, conforming to the sunlight AM1.5G spectrum A+ standard.

[0007] The LED light source of the solar photovoltaic device simulator of the present invention can be safely and effectively applied to a solar photovoltaic (PV) device simulator to improve the output utilization rate of photovoltaic products.

[0008] Optionally, the area ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip = 1:1:1.1:1:1:1.

[0009] Optionally, the quantity ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip = 1:1:1.2:2:2:1.

[0010] Optionally, the fluorescent glue is formed by preparing a 6500K fluorescent glue solution, and the 6500K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 470-485nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 650-660nm, infrared fluorescent powder with an emission wavelength of 725-735nm, infrared fluorescent powder with an emission wavelength of 795-805nm, infrared fluorescent powder with an emission wavelength of 880-900nm, infrared fluorescent powder with an emission wavelength of 1010-1030nm, and infrared fluorescent powder with an emission wavelength of 1140-1160nm.

[0011] Optionally, the 6500K fluorescent glue solution is composed of glue: blue powder with an emission wavelength of 480nm: green powder with an emission wavelength of 530nm: fluorescent powder with an emission wavelength of 650nm: infrared fluorescent powder with an emission wavelength of 730nm: infrared fluorescent powder with an emission wavelength of 800nm: infrared fluorescent powder with an emission wavelength of 890nm: infrared fluorescent powder with an emission wavelength of 1024nm: infrared fluorescent powder with an emission wavelength of 1150nm = 3:

[0012] Prepared in the ratio of (0.05 - 0.15):(0.4 - 0.6):(0.12 - 0.16):(0.9 - 1.1):(0.9 - 1.1):(0.9 - 1.1):(1.5 - 1.8):(1.5 - 1.8).

[0013] Optionally, the blue phosphor with an emission wavelength of 470 - 485 nm is Lu3Al5O 12 :Ce 3+ component; the green phosphor with an emission wavelength of 530 - 540 nm is Lu3Al5O 12 :Ce 3+ component; the red phosphor with an emission wavelength of 650 - 660 nm is CaAlSiN3:Eu component; the infrared phosphor with an emission wavelength of 725 - 735 nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 120 - 130 nm; the infrared phosphor with an emission wavelength of 795 - 805 nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 140 - 160 nm; the infrared phosphor with an emission wavelength of 880 - 900 nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 140 - 160 nm; the infrared phosphor with an emission wavelength of 1010 - 1030 nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 160 - 180 nm; the infrared phosphor with an emission wavelength of 1140 - 1160 nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 140 - 160 nm.

[0014] Optionally, the LED light color quality satisfies the spectral energy proportion as: Ф e (300 - 470 nm): Ф e (470 - 561 nm): Ф e (561 - 657 nm): Ф e (657 - 772 nm): Ф e (772 - 919 nm): Ф e (919 - 1200 nm)=(15% - 16%):(17.5% - 18.5%):(16.5% - 17.5%):(14.8% - 16%):(17.8% - 18.3%):(15.7% - 16.1%).

[0015] Optionally, the LED light color quality satisfies the relative spectral height as follows:

[0016] 500 - 850 nm ≥ 0.45;

[0017] 850 - 1200 nm ≥ 0.2;

[0018] The peak wavelength is between 480 - 490 nm.

[0019] The present invention also provides a method for preparing an LED light source for a solar photovoltaic device simulator, comprising the following steps:

[0020] S100: Place the first LED wafer, the second LED wafer, the third LED wafer, the fourth LED wafer, the fifth LED wafer, the sixth LED wafer, and the seventh LED wafer in the bowl cup, and use die bonding with insulating glue or silver glue to fix them on the bracket with a die bonder. After die bonding, bake them in an oven at a temperature of 150 - 160 °C for 2 h ± 10 min to completely fix the first LED wafer, the second LED wafer, the third LED wafer, the fourth LED wafer, the fifth LED wafer, the sixth LED wafer, and the seventh LED wafer in the bowl cup;

[0021] S200: Use a gold wire bonder to bond the first LED wafer, the second LED wafer, the third LED wafer, the fourth LED wafer, the fifth LED wafer, the sixth LED wafer, and the seventh LED wafer to the positive and negative electrodes with gold wires;

[0022] S300: Prepare a fluorescent glue solution, which is a mixture of glue, blue powder, green powder, red powder, and infrared fluorescent powder;

[0023] S400: Pour the prepared fluorescent glue solution into the glue bucket of the dispenser. After discharging and degassing, dispense the fluorescent glue solution into the bowl cup according to the color parameter requirements. After dispensing, bake it under the conditions of 80 °C / 0.5 h + 160 °C / 4 h;

[0024] S500: After baking the completed LED, de - grain it and then spectro - analyze it with a spectro - testing machine according to the given color parameter requirements, so that the LED light color quality formed in the bowl cup meets Ra > 98, R1 - R15 > 90, Rg > 98, Rf > 95, the S / P ratio and M / P ratio are higher than those of sunlight with the same color temperature, the color temperature meets the specified chromaticity standard 603 coordinates, the chromaticity coordinates meet the 3 - order color tolerance chromaticity standard, the similarity coefficient SSI(300 - 830) with sunlight at 6000 K is > 93%, the similarity coefficient SSI(350 - 830) with sunlight at 6000 K is > 93%, and it meets the IEC - 60904 - 2020 standard and conforms to the sunlight AM1.5G spectrum A+ standard.

[0025] Compared with the prior art, the solar photovoltaic device simulator LED light source of the present invention and its preparation method have the following beneficial effects:

[0026] 1. Both the S / P ratio (2.36) and the M / P ratio (1.056) parameters are greater than or equal to the same spectrum of sunlight with the same color temperature [the same S / P ratio (2.36) and M / P ratio (1.043) for the same sunlight], providing a comfortable sensory experience, clear vision, and a soft and beautiful visual experience;

[0027] 2. SSI (300 - 830nm) > 93, SSI (350 - 830nm) > 93, with excellent spectral similarity parameters, restoring the color of natural light, allowing people to experience nature and enjoy the sunlight bath;

[0028] 3. The relative spectral intensity at 650 - 700nm > 0.4. Repeated low-intensity irradiation on the retina can continuously promote the retinal choroid circulation, improve scleral hypoxia, thereby continuously controlling the growth of the eye axis, making it easier for people to see objects, solving visual fatigue, and preventing myopia;

[0029] 4. K B，V (Blue light hazard efficiency) = 0.000914784, which is equal to the K B，V (Blue light hazard efficiency) of sunlight with the same color temperature (i.e., K B，V / K B，V (6000K sunlight) = 100%), meeting the blue light exemption RG0 standard, and the eye-protecting spectrum is healthier;

[0030] 5. Referring to the IEC-60904-2020 standard, it meets the sunlight AM1.5G spectrum A+ standard and can be safely and effectively applied to solar photovoltaic (PV) device simulators, improving the output utilization rate of photovoltaic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the solar photovoltaic device simulator LED light source provided by an embodiment of the present invention.

[0032] Figure 2 is a cross-sectional view of the solar photovoltaic device simulator LED light source provided by an embodiment of the present invention.

[0033] Figure 3 is a wire bonding schematic diagram of the solar photovoltaic device simulator LED light source provided by an embodiment of the present invention.

[0034] Figure 4 is a luminous spectral curve diagram of the solar photovoltaic device simulator LED light source provided by an embodiment of the present invention.

[0035] Figure 5It is a calculation graph of the spectral similarity between the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention and the 6000K SSI spectrum.

[0036] Figure 6 It is a calculation graph of the SSI spectral similarity of the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention.

[0037] Figure 7 It is a test report of the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention.

[0038] Figure 8 It is the requirement index of the chromaticity landing point bin graph of the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention.

[0039] Figure 9 The mainstream form of the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention is a spectral graph of more than a dozen light source combinations.

[0040] Reference numerals:

[0041] 1—First LED chip 1 2—Second LED chip 2 3—Third LED chip 3

[0042] 4—Fourth LED chip 4 5—Fifth LED chip 5 6—Sixth LED chip 6

[0043] 7—Seventh LED chip 7 16—Bowl cup 16 17—Bracket 17

[0044] 18—Fluorescent glue 18. Detailed implementation manners

[0045] Below, in conjunction with the attached Figures 1 to 9 The technical solutions of the present invention will be further described in detail. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] As Figures 1 to 2 shown, the embodiment of the present invention provides a solar photovoltaic device simulator LED light source, including a plurality of LED chips, a bracket 17, silica gel, and a fluorescent glue 18. The bracket 17 has a bowl cup 16 and positive and negative electrodes. A plurality of the LED chips are all arranged in the bowl cup 16, and each of the LED chips is connected in series with the positive and negative electrodes through wire bonding. The fluorescent glue 18 is coated on each of the LED chips;

[0047] Among them, the multiple LED wafers include a first LED wafer 1 with a peak wavelength of 310 - 315 nm, a second LED wafer 2 with a peak wavelength of 350 - 370 nm, a third LED wafer 3 with a peak wavelength of 400 - 410 nm, a fourth LED wafer 4 with a main wavelength of 440 - 445 nm, a fifth LED wafer 5 with a main wavelength of 450 - 455 nm, a sixth LED wafer 6 with a main wavelength of 465 - 470 nm, and a seventh LED wafer 7 with a main wavelength of 475 - 485 nm;

[0048] Among them, the fluorescent glue 18 includes blue powder, green powder, red powder, and infrared fluorescent powder, and makes the LED light color quality formed in the bowl cup 16 satisfy Ra > 98, R1 - R15 > 90, Rg > 98, Rf > 95, S / P ratio and M / P ratio are higher than sunlight of the same color temperature, the color temperature satisfies the specified chromaticity standard 603 coordinates, the chromaticity coordinates satisfy the 3 - order color tolerance chromaticity standard, the similarity SSI(300 - 830) coefficient with sunlight at 6000K > 93%, the similarity SSI(350 - 830) coefficient with sunlight at 6000K > 93%, and meets the IEC - 60904 - 2020 standard, conforming to the sunlight AM1.5G spectrum A+ standard.

[0049] The LED light source of the solar photovoltaic device simulator of the present invention can be safely and effectively applied to the solar photovoltaic (PV) device simulator to improve the output utilization rate of photovoltaic products.

[0050] It should be noted that it can be calculated using the blue light hazard efficiency K B，V That is, the ratio of the blue light hazard weighted radiance L B to the corresponding photometric quantity, and the calculation formula is:

[0051]

[0052] Among them, K m = 683 lm / W, V(λ) is the spectral luminous efficiency (or visibility function), and B(λ) is the blue light hazard weighted function. K B，V Characterizes the relative quantity value of the blue light component in the visible radiation. Under the condition of the same brightness of the lighting product, the higher K B，V , the greater the possibility of the light source harming the retina.

[0053] Referring to the EC - 60904 - 2020 standard sunlight simulator grading standard, as shown in Table 1 below:

[0054]

[0055] Table 1

[0056] The calculation results of the embodiments of the present invention are shown in Table 2 below:

[0057]

[0058] Table 2

[0059] In another embodiment of the present invention, the area ratio of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, the fifth LED chip 5, the sixth LED chip 6, and the seventh LED chip 7 is 1:1:1.1:1:1:1.

[0060] In another embodiment of the present invention, the quantity ratio of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, the fifth LED chip 5, the sixth LED chip 6, and the seventh LED chip 7 is 1:1:1.2:2:2:1.

[0061] In another embodiment of the present invention, the fluorescent glue 18 is formed by preparing a 6500K fluorescent glue solution, and the 6500K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 470 - 485 nm, green powder having an emission wavelength of 530 - 540 nm, red powder having an emission wavelength of 650 - 660 nm, infrared fluorescent powder having an emission wavelength of 725 - 735 nm, infrared fluorescent powder having an emission wavelength of 795 - 805 nm, infrared fluorescent powder having an emission wavelength of 880 - 900 nm, infrared fluorescent powder having an emission wavelength of 1010 - 1030 nm, and infrared fluorescent powder having an emission wavelength of 1140 - 1160 nm.

[0062] In another embodiment of the present invention, the 6500K fluorescent glue solution is prepared in a ratio of glue: blue powder with an emission wavelength of 480nm: green powder with an emission wavelength of 530nm: phosphor with an emission wavelength of 650nm: infrared phosphor with an emission wavelength of 730nm: infrared phosphor with an emission wavelength of 800nm: infrared phosphor with an emission wavelength of 890nm: infrared phosphor with an emission wavelength of 1024nm: infrared phosphor with an emission wavelength of 1150nm = 3:(0.05 - 0.15):(0.4 - 0.6):(0.12 - 0.16):(0.9 - 1.1):(0.9 - 1.1):(0.9 - 1.1):(1.5 - 1.8):(1.5 - 1.8). Specifically, the 6500K fluorescent glue solution is prepared in a ratio of glue: blue powder with an emission wavelength of 480nm: green powder with an emission wavelength of 530nm: phosphor with an emission wavelength of 650nm: infrared phosphor with an emission wavelength of 730nm: infrared phosphor with an emission wavelength of 800nm: infrared phosphor with an emission wavelength of 890nm: infrared phosphor with an emission wavelength of 1024nm: infrared phosphor with an emission wavelength of 1150nm = 3:0.05:0.4:0.12:0.9:0.9:0.9:1.5:1.5, or = 3:0.15:0.6:0.16:1.1:1.1:1.1:1.8:1.8, or = 3:0.07:0.5:0.14:1:1:1:1.7:1.6.

[0063] Preferably, the blue powder with an emission wavelength of 470 - 485nm is Lu3Al5O 12 :Ce 3+ component; the green powder with an emission wavelength of 530 - 540nm is Lu3Al5O 12 :Ce 3+ component; the red powder with an emission wavelength of 650 - 660nm is CaAlSiN3:Eu component; the infrared phosphor with an emission wavelength of 725 - 735nm is Ga4GeO8:Cr 3+ component, with a half - wave width of 120 - 130nm; the infrared phosphor with an emission wavelength of 795 - 805nm is Ga4GeO8:Cr 3+ component, and the half - wave width can be 140nm, 150nm or 160nm; the infrared phosphor with an emission wavelength of 880 - 900nm is Ga4GeO8:Cr 3+ component, and the half - wave width can be 140nm, 150nm or 160nm; the infrared phosphor with an emission wavelength of 1010 - 1030nm is Ga4GeO8:Cr 3+The component has a half-width at half-maximum that can be 160 nm, 170 nm, or 180 nm; the infrared phosphor with an emission wavelength of 1140 - 1160 nm is Ga4GeO8:Cr 3+ The component has a half-width at half-maximum of 140 nm, 150 nm, or 160 nm.

[0064] Through the above structural design and configuration, the color quality of the LED light source of the solar simulator device according to the embodiment of the present invention satisfies the spectral energy proportion as follows: Ф e (300 - 470 nm): Ф e (470 - 561 nm): Ф e (561 - 657 nm): Ф e (657 - 772 nm): Ф e (772 - 919 nm): Ф e (919 - 1200 nm) = (15% - 16%):(17.5% - 18.5%):(16.5% - 17.5%):(14.8% - 16%):(17.8% - 18.3%):(15.7% - 16.1%). In this way, it can meet the IEC-60904-2020 standard and conform to the sunlight AM1.5G spectrum A+ standard.

[0065] Meanwhile, the color quality of the LED light source of the solar simulator device according to the embodiment of the present invention also satisfies the relative spectral height as follows: 500 - 850 nm ≥ 0.45; 850 - 1200 nm ≥ 0.2; the peak wavelength is at 480 - 490 nm.

[0066] The present invention also provides a method for preparing an LED light source of a solar photovoltaic device simulator, including the following steps:

[0067] Step S100: Place the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, the fifth LED chip 5, the sixth LED chip 6, and the seventh LED chip 7 in the bowl cup 16, and use a die bonder to fix them on the bracket 17 with insulating glue or silver glue. After die bonding, bake them in an oven at a temperature of 150 - 160 °C for 2 h ± 10 min to completely fix the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, the fifth LED chip 5, the sixth LED chip 6, and the seventh LED chip 7 in the bowl cup 16;

[0068] Step S200: Connect the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, the fifth LED chip 5, the sixth LED chip 6, and the seventh LED chip 7 to the positive and negative electrodes by using a gold wire bonder for gold wire bonding;

[0069] Step S300: Prepare 1 kind of fluorescent glue solution, which is a mixture of glue, blue powder, green powder, red powder, and infrared fluorescent powder;

[0070] Step S400: Pour the prepared fluorescent glue solution into the glue bucket of the dispenser. After discharging the glue and removing the bubbles, dispense the fluorescent glue solution into the bowl cup 16 according to the color parameter requirements. After dispensing, bake it under the conditions of 80°C / 0.5H + 160°C / 4H;

[0071] Step S500: After baking the completed LEDs, dechip them and then use a spectro-testing machine to spectroscopically analyze them according to the given color parameter requirements, so that the LED light color quality formed in the bowl cup 16 satisfies Ra>98, R1-R15>90, Rg>98, Rf>95, the S / P ratio and the M / P ratio are higher than those of sunlight of the same color temperature, the color temperature meets the specified chromaticity standard 603 coordinates, the chromaticity coordinates meet the 3rd-order color tolerance chromaticity standard, the similarity coefficient SSI(300-830) with sunlight at 6000K is >93%, the similarity coefficient SSI(350-830) with sunlight at 6000K is >93%, and it meets the IEC-60904-2020 standard and conforms to the sunlight AM1.5G spectrum A+ standard.

[0072] Furthermore, the LED light source of the solar photovoltaic device simulator produced by the above preparation method in this embodiment can be reflected according to the following 4 tables when compared with sunlight.

[0073] Among them, Table 3 is a comparison table of the S / P ratio and M / P ratio of the LED light source of the solar photovoltaic device simulator provided in the embodiment of the present invention with sunlight at 6000K.

[0074]

[0075] Table 3

[0076] Among them, Table 4 is the blue light hazard efficiency K B，V comparison table of the LED light source of the solar photovoltaic device simulator provided in the embodiment of the present invention with sunlight at 6000K.

[0077]

[0078] Table 4

[0079] Among them, Table 5 is the spectral splitting parameter table of the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention.

[0080]

[0081] Table 5

[0082] Furthermore, after testing the LED light source of the solar photovoltaic device simulator of the embodiment of the present invention, the results of its photobiological hazard type test (IEC 62471:2006) can be shown in the following Table 6 as follows:

[0083]

[0084]

[0085] Table 6

[0086] Thus, it can be seen that the LED light source of the solar photovoltaic device simulator provided by the embodiment of the present invention and its preparation method have at least the following beneficial effects:

[0087] 1. Both the S / P ratio (2.36) and the M / P ratio (1.056) parameters are greater than or equal to the same spectrum of sunlight with the same color temperature [the same S / P ratio (2.36) and M / P ratio (1.043) of sunlight], providing a comfortable sensory experience, clear vision, and a soft and beautiful visual experience;

[0088] 2. SSI (300 - 830nm) > 93, SSI (350 - 830nm) > 93, with excellent spectral similarity parameters, restoring the color of natural light, allowing people to experience nature and enjoy the sunshine bath;

[0089] 3. The relative spectral intensity at 650 - 700nm > 0.4. When irradiated on the retina repeatedly at a low intensity, it can continuously promote the retinal choroid circulation, improve scleral hypoxia, thereby continuously controlling the growth of the eye axis, making it easier for people to see objects, solving visual fatigue, and preventing myopia;

[0090] 4. K B，V (Blue light hazard efficiency) = 0.000914784, which is equal to the K B，V (Blue light hazard efficiency) of sunlight with the same color temperature (i.e., K B，V / K B，V (6000K sunlight) = 100%), meeting the blue light exemption RG0 standard, and the eye - protecting spectrum is healthier;

[0091] 5. Refer to the IEC-60904-2020 standard, meet the solar spectrum A+ standard of sunlight AM1.5G, and can be safely and effectively applied to solar photovoltaic (PV) device simulators to improve the output utilization rate of photovoltaic products.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A solar photovoltaic device simulator LED light source, characterized in that: It includes multiple LED chips, a bracket, silica gel, and fluorescent glue. The bracket has a bowl cup and positive and negative electrodes. Multiple LED chips are all arranged in the bowl cup, and each LED chip is connected in series with the positive and negative electrodes through gold wire bonding. The fluorescent glue coats each LED chip; Among them, the multiple LED chips include a first LED chip with a peak wavelength of 310 - 315 nm, a second LED chip with a peak wavelength of 350 - 370 nm, a third LED chip with a peak wavelength of 400 - 410 nm, a fourth LED chip with a main wavelength of 440 - 445 nm, a fifth LED chip with a main wavelength of 450 - 455 nm, a sixth LED chip with a main wavelength of 465 - 470 nm, and a seventh LED chip with a main wavelength of 475 - 485 nm; The fluorescent glue is formed by preparing a 6500K fluorescent glue solution. The 6500K fluorescent glue solution is formed by mixing glue with blue powder with an emission wavelength of 470 - 485 nm, green powder with an emission wavelength of 530 - 540 nm, red powder with an emission wavelength of 650 - 660 nm, infrared fluorescent powder with an emission wavelength of 725 - 735 nm, infrared fluorescent powder with an emission wavelength of 795 - 805 nm, infrared fluorescent powder with an emission wavelength of 880 - 900 nm, infrared fluorescent powder with an emission wavelength of 1010 - 1030 nm, and infrared fluorescent powder with an emission wavelength of 1140 - 1160 nm; The 6500K fluorescent glue solution is prepared according to the ratio of glue: blue powder with an emission wavelength of 480 nm: green powder with an emission wavelength of 530 nm: fluorescent powder with an emission wavelength of 650 nm: infrared fluorescent powder with an emission wavelength of 730 nm: infrared fluorescent powder with an emission wavelength of 800 nm: infrared fluorescent powder with an emission wavelength of 890 nm: infrared fluorescent powder with an emission wavelength of 1024 nm: infrared fluorescent powder with an emission wavelength of 1150 nm = 3:(0.05 - 0.15):(0.4 - 0.6):(0.12 - 0.16):(0.9 - 1.1):(0.9 - 1.1):(0.9 - 1.1):(1.5 - 1.8):(1.5 - 1.8); Among them, the fluorescent glue includes blue powder, green powder, red powder, and infrared fluorescent powder, and makes the LED light color quality formed in the bowl cup satisfy Ra>98, R1 - R15>90, Rg>98, Rf>95, S / P ratio and M / P ratio are higher than sunlight of the same color temperature, the color temperature satisfies the specified chromaticity standard 603 coordinates, the chromaticity coordinates satisfy the 3 - order color tolerance chromaticity standard, the similarity coefficient SSI(300 - 830) with sunlight at 6000K>93%, the similarity coefficient SSI(350 - 830) with sunlight at 6000K>93%, and meets the IEC - 60904 - 2020 standard, conforming to the sunlight AM1.5G spectrum A+ standard; The specified chromaticity standard coordinates of the LED light source of the solar photovoltaic device simulator are: an elliptical coordinate system enclosed by a center coordinate point of ccx = 0.3225, ccy = 0.3384, a major axis a = 0.00744, a minor axis b = 0.00318, and an inclination angle θ = 60.

37.

2. The LED light source of the solar photovoltaic device simulator according to claim 1, wherein: The area ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip = 1:1:1.1:1:1:

1.

3. The LED light source of the solar photovoltaic device simulator according to claim 1, characterized in that: The quantity ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip = 1:1:1.2:2:2:

1.

4. The LED light source of the solar photovoltaic device simulator according to claim 1, characterized in that: The blue phosphor with an emission wavelength of 470 - 485 nm is Lu3Al5O 12 :Ce 3+ composition; The green phosphor with an emission wavelength of 530 - 540 nm is Lu3Al5O 12 :Ce 3+ composition; The red phosphor with an emission wavelength of 650 - 660 nm is of the CaAlSiN3:Eu composition; The infrared phosphor with an emission wavelength of 725 - 735 nm is Ga4GeO8:Cr 3+ component, and the full width at half maximum is 120 - 130 nm; The infrared phosphor with an emission wavelength of 795 - 805 nm is Ga4GeO8:Cr 3+ component, and the full width at half maximum is 140 - 160 nm; The infrared phosphor with an emission wavelength of 880 - 900 nm is Ga4GeO8:Cr 3+ component, and the full width at half maximum is 140 - 160 nm; The infrared phosphor with an emission wavelength of 1010 - 1030 nm is Ga4GeO8:Cr 3+ component, and the full width at half maximum is 160 - 180 nm; The infrared phosphor with an emission wavelength of 1140 - 1160 nm is Ga4GeO8:Cr 3+ component, and the full width at half maximum is 140 - 160 nm.

5. The LED light source of the solar photovoltaic device simulator according to claim 1, characterized in that: The LED light color quality meets the spectral energy ratio as follows: Ф e (300 - 470 nm): Ф e (470 - 561 nm): Ф e (561 - 657 nm): Ф e (657 - 772 nm): Ф e (772 - 919 nm): Ф e (919 - 1200 nm) = (15% - 16%):(17.5% - 18.5%):(16.5% - 17.5%):(14.8% - 16%):(17.8% - 18.3%):(15.7% - 16.1%).

6. The LED light source of the solar photovoltaic device simulator according to claim 1, wherein: The LED light color quality satisfies the relative spectral height as follows: 500 - 850 nm ≥ 0.45; 850 - 1200 nm ≥ 0.2; The peak wavelength is between 480 - 490 nm.

7. A method for preparing an LED light source of a solar photovoltaic device simulator according to any one of claims 1 to 6, characterized in that: It includes the following steps: S100: Place the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip in the bowl cup, and fix them on the bracket with a die bonder using insulating glue or silver glue. After die bonding, bake in an oven at a temperature of 150 - 160 °C for 2 h ± 10 min to completely fix the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip in the bowl cup; S200: Use a gold wire bonder to bond the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip, the sixth LED chip, and the seventh LED chip to the positive and negative electrodes with gold wires; S300: Prepare 1 kind of fluorescent glue solution, which is a mixture of glue, blue phosphor, green phosphor, red phosphor, and infrared fluorescent phosphor; S400: Pour the prepared fluorescent glue solution into the glue bucket of the dispenser. After discharging and degassing, apply the fluorescent glue solution to the bowl cup according to the color parameter requirements. After dispensing, bake under the conditions of 80 °C / 0.5H + 160 °C / 4H; S500: After the baked LEDs are threshed, they are spectroscopically analyzed by a spectro-testing machine according to the given color parameter requirements, so that the LED light color quality formed in the bowl cup meets Ra>98, R1-R15>90, Rg>98, Rf>95, the S / P ratio and the M / P ratio are higher than that of sunlight of the same color temperature, the color temperature meets the specified chromaticity standard 603 coordinates, the chromaticity coordinates meet the 3rd-order color tolerance chromaticity standard, the similarity coefficient SSI(300-830) with sunlight at 6000K is >93%, and the similarity coefficient SSI(350-830) with sunlight at 6000K is >93% ， And meet the IEC-60904-2020 standard, conforming to the sunlight AM1.5G spectrum A+ standard.

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