Integrated high-power LED light source for photobiomodulation and its preparation method

Abstract

The present invention relates to the field of LED technology, and particularly relates to a photobiomodulation integrated high-power LED light source and a preparation method thereof. The photobiomodulation integrated high-power LED light source includes a bracket and 336 LED chips disposed on the bracket. The 336 LED chips are arranged in a 28-series and 12-parallel series-parallel circuit manner, and a fluorescent glue covering each LED chip is coated on the bracket; the 336 LED chips include a first LED chip, a second LED chip, a third LED chip, a fourth LED chip, and a fifth LED chip. The photobiomodulation integrated high-power LED light source of the present invention can prevent blue light hazards and create a comfortable and healthy light environment; when it can be used as a plant light source, the crop utilization rate is about 2% higher than that of sunlight of the same color temperature, which is beneficial to the growth and development of plants.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, and particularly relates to a photobiomodulation integrated high-power LED light source and a preparation method thereof. Background Art

[0002] With the continuous development of lighting technology, the requirements of humans for the quality of lighting have evolved from clear, vivid, and safe visual perception to the current requirements for health and production.

[0003] However, in the field of LED lighting, there are few applications in the fields of health and production. Ultimately, the existing broadband LED light sources cannot achieve a high spectral peak and a low blue light value. Therefore, it is difficult to achieve the function of photobiomodulation, and there is an urgent need for the industry to conduct corresponding research and development on LED lighting in such fields. Summary of the Invention

[0004] To solve the above-mentioned problems existing in the prior art, the present invention provides a photobiomodulation integrated high-power LED light source and a preparation method thereof, which can achieve a high spectral peak and a low blue light value.

[0005] The present invention adopts the following technical solutions to solve the above technical problems: A photobiomodulation integrated high-power LED light source includes a bracket and 336 LED wafers arranged on the bracket. The 336 LED wafers are arranged in a 28-series and 12-parallel series-parallel circuit, and a fluorescent glue covering each of the LED wafers is coated on the bracket;

[0006] The 336 LED wafers include a first LED wafer with a peak wavelength of 410 - 415 nm, a second LED wafer with a main wavelength of 440 - 445 nm, a third LED wafer with a main wavelength of 450 - 455 nm, a fourth LED wafer with a main wavelength of 465 - 470 nm, and a fifth LED wafer with a main wavelength of 475 - 485 nm;

[0007] The fluorescent glue is made of a 5000K fluorescent glue solution, and the mass ratio of the components of the 5000K fluorescent glue solution is glue: blue powder with an emission peak wavelength of 450 - 470 nm: blue powder with an emission peak wavelength of 490 - 500 nm: green powder with an emission peak wavelength of 535 - 545 nm: red powder with an emission peak wavelength of 630 - 640 nm: infrared powder with an emission peak wavelength of 725 - 735 nm = 22: (1.3 - 1.8): (0.2 - 0.3): (3.4 - 3.9): (0.18 - 0.26): (2.8 - 3.3);

[0008] The light bioregulation integrated high-power LED light source has a blue light content 23.7% lower than that of sunlight at 5000K, and an infrared light component 43.8% higher than that of sunlight; the spectral height in the range of 380 - 500nm is <0.8; 0.55 < the spectral height in the range of 500 - 680nm < 0.65; there is a small wave peak in the spectral range of 680 - 780nm and the peak wavelength is between 680 - 740nm; the color rendering index Ra > 97, R1 - R15 > 95; the color quality index COS > 97; the color tolerance sdcm < 3; for TM - 30 - 18, Rg > 98, RP97, Rf, skin > 97; the COI (acid anhydride index) < 3.3.

[0009] A method for preparing a light bioregulation integrated high-power LED light source includes the following steps:

[0010] S001: Import the coordinates of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, and the fifth LED chip into the die bonding machine program, and fix each LED chip on the bracket with die bonding glue;

[0011] S002: Put the material after die bonding into an oven and bake it under the conditions of 160 ± 5°C / 2h ± 10min;

[0012] S003: Wire bond each LED chip in a 28 - series and 12 - parallel series - parallel connection method;

[0013] S004: After completing the wire bonding of the LED chips, light them with a micro - current of a DC power supply (VF = 64V, IF = 10mA) and dehumidify them under the conditions of 130 ± 5°C / 2h ± 10min;

[0014] S005: Prepare a fluorescent glue solution and perform centrifugal defoaming on the fluorescent glue solution with a centrifugal defoaming machine;

[0015] S006: Perform dispensing of the fluorescent glue solution according to the color points and color parameters required by the design;

[0016] S007: After completing the dispensing, perform low - temperature baking under the conditions of 45 ± 5°C / 3h ± 10min to form a phosphor precipitate from the fluorescent glue solution, so as to improve the binning rate and luminous flux;

[0017] S008: After completing the phosphor precipitation, perform high - temperature baking under the conditions of 160 ± 5°C / 6h ± 10min;

[0018] S009: After completing the high - temperature baking, perform spectral splitting according to the given chromaticity coordinates and light color parameters;

[0019] S010: After spectral splitting is completed, light it up at a high temperature of 100 ± 5 °C with a microcurrent (VF = 64 V, IF = 10 mA) to determine whether there is any electrical defect in the product;

[0020] S011: Mark the qualified products and store them in the warehouse.

[0021] Compared with the prior art, the photobiomodulation integrated high-power LED light source and its preparation method of the present invention have the following beneficial effects: In the prepared photobiomodulation integrated high-power LED light source, its S / P ratio (scotopic-to-photopic luminance ratio) is basically the same as that of 5000K sunlight of the same color temperature, creating a comfortable light environment. The M / P ratio (mesopic luminance ratio) is basically the same as that of 5000K sunlight of the same color temperature. The blue light is lower than that of sunlight, and the peak wavelength is between 690 - 740 nm, preventing blue light hazards. The relative infrared light contrast ratio compared to sunlight is 43.8% higher. When used as a plant light source, the crop utilization rate is about 2% higher than that of sunlight of the same color temperature, which is beneficial to the growth and development of plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of the photobiomodulation integrated high-power LED light source of the present invention.

[0023] Figure 2 is Figure 1 a schematic enlarged view of the local structure at A in

[0024] Figure 3 is a simulation diagram of the photobiomodulation integrated high-power LED light source of the present invention.

[0025] Figure 4 is a spectrogram of the photobiomodulation integrated high-power LED light source of the embodiment of the present invention.

[0026] Figure 5 is a diagram of the spectral similarity calculation [SSI(380 - 780nm) > 89] of the photobiomodulation integrated high-power LED light source of the embodiment of the present invention.

[0027] Figure 6 is the blue light hazard efficiency K of the photobiomodulation integrated high-power LED light source of the embodiment of the present invention B，V comparison diagram.

[0028] Figure 7 is a TV lighting index TLCI - 2012 diagram of the photobiomodulation integrated high-power LED light source of the embodiment of the present invention.

[0029] Figure 8 is a test report diagram of the photobiomodulation integrated high-power LED light source of the embodiment of the present invention.

[0030] Figure 9 It is the binning diagram of the photobiomodulation integrated high-power LED light source according to an embodiment of the present invention.

[0031] Figure 10 It is the calculation result diagram of the medical aesthetic parameters of the photobiomodulation integrated high-power LED light source according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1 - First LED chip, 2 - Second LED chip, 3 - Third LED chip

[0034] 4 - Fourth LED chip, 5 - Fifth LED chip, 6 - Sixth LED chip

[0035] 7 - Substrate, 8 - Fluorescent glue, 9 - Boss. Detailed implementation manners

[0036] Next, in combination with the attached Figures 1 to 10 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 implementation manners, not every implementation manner only includes an independent technical solution. This narrative manner 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 implementation manners that can be understood by those skilled in the art.

[0037] As Figures 1 to 3 shown, a photobiomodulation integrated high-power LED light source provided by an embodiment of the present invention includes a bracket and 336 LED chips arranged on the bracket. The 336 LED chips are arranged in a circuit in a 28-series and 12-parallel series-parallel connection manner, and a fluorescent glue 8 covering each LED chip is coated on the bracket.

[0038] Among them, the 336 LED chips include a first LED chip 1 with a peak wavelength of 410 - 415 nm, a second LED chip 2 with a main wavelength of 440 - 445 nm, a third LED chip 3 with a main wavelength of 450 - 455 nm, a fourth LED chip 4 with a main wavelength of 465 - 470 nm, and a fifth LED chip 5 with a main wavelength of 475 - 485 nm. As shown in Figure 3 , the black chip is the first LED chip 1, the pink chip is the second LED chip 2, the blue chip is the third LED chip 3, the green chip is the fourth LED chip 4, and the yellow chip is the fifth LED chip 5. A total of 336 LED chips (including the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, and the fifth LED chip 5) are arranged in a circuit in a 28-series and 12-parallel series-parallel connection manner.

[0039] As shown Figures 1 to 2 in the figure, the bracket includes a substrate 7, and the preferred model of the substrate 7 is the 3835 triple-yanyi 1.5T nickel-palladium-gold-plated C0B flip-chip copper substrate 7SY / LDR-PC3835U-A0. The first LED chip 1 preferably has a model of Sanan 22*35mil2 double-electrode violet LED chip. The second LED chip 2, the third LED chip 3, and the fourth LED chip 4 all preferably have a model of Jucan 22*35mil2 double-electrode blue LED chips. The fifth LED chip 5 preferably has a model of Sanan 22*35mil2 double-electrode blue LED chip.

[0040] As shown Figures 1 to 2 in the figure, a boss 9 is provided on the substrate 7. The boss 9 has a certain height. The fifth LED chip 5 is arranged on the boss 9 and is at a relatively high height, higher than the horizontal planes of the first LED chip 1, the second LED chip 2, the third LED chip 3, and the fourth LED chip 4.

[0041] In this embodiment, by providing the boss 9 on the substrate 7, the fifth LED chip 5 with a main wavelength of 475 - 485nm is placed on it through die bonding. In this way, it is beneficial for light to closely contact the eyes, improving the sense of light intake, increasing the M / P ratio value (non-visual visual brightness ratio) of the product, and thus improving the eye concentration. Moreover, the LED light source structure of this embodiment has high power, and a single light source structure can be suitable for occasions with high light brightness requirements, no longer requiring multiple light sources to be combined, and the power can reach 100W.

[0042] The height of the boss 9 is between 0.08 and 0.12mm. Preferably, the height of the boss 9 is 0.1mm. In this way, while being beneficial for light to closely contact the eyes, it also improves the wire bonding reliability performance of the product and realizes an optimized design.

[0043] Among them, the thickness of the substrate 7 is between 1.4 and 1.6mm. Preferably, the thickness of the substrate 7 is 1.5mm.

[0044] Furthermore, the quantity ratio of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, and the fifth LED chip 5 is 2:8:8:8:2.

[0045] As can be Figure 4 seen, the spectral characteristics of the photobiomodulation integrated high-power LED light source in the embodiment of the present invention are as follows:

[0046] 1. The spectral height of 380 - 500nm is <0.8, and the low blue light is beneficial for eye relaxation;

[0047] 2.0.55 < The height in the range of 500 - 680 nm is < 0.65, the spectrum is smooth, the visual effect is better, approaching the equal-energy white light spectrum. The lower the color purity, the closer it is to white light;

[0048] 3. The height in the range of 680 - 780 nm > 0.6, rich in infrared components, which helps to protect the eyes, activates the conversion of large molecules in the eyes into small molecule water, and is beneficial to moisturize and protect the eyes;

[0049] 4. There are small wave peaks in the spectrum of 680 - 780 nm and the peak wavelength is between 680 - 740 nm, which plays a role in micro-infrared light stimulation and makes eye protection healthier.

[0050] See Figure 5 , the photobiomodulation integrated high-power LED light source of the embodiment of the present invention has a high spectral similarity and restores natural colors by 100%.

[0051] See Figure 6 , the photobiomodulation integrated high-power LED light source of the embodiment of the present invention, its blue light hazard efficiency K B，V = 0.000693017, which is lower than the blue light hazard efficiency K B，V of sunlight with the same color temperature, meets the blue light exemption RG0 standard, and at the same time meets the requirements of the photobiological exemption level.

[0052] Its blue light hazard efficiency K B，V is lower than the blue light hazard efficiency K B，V of sunlight with the same color temperature and meets the blue light exemption RG0 standard. The photobiomodulation integrated high-power LED light source of the embodiment of the present invention realizes a large range of simulated sunlight spectra, has a wide range of applicable occasions and a large applicable field. For example, it can be used as a rest-state light source for health lighting, a light source for photobiomodulation, plant lighting, a working-state light source for health lighting, and a medical lighting source.

[0053] In combination with Figure 10 as shown, when the photobiomodulation integrated high-power LED light source of this embodiment is used as a medical aesthetic light source, the proportion of the activation energy of cytochrome c oxidase > 30%, the penetration of biological tissue > 2.5 mm, and the proportion of effective light radiation > 48%, which is beneficial to the activation energy of tissue cells.

[0054] In this embodiment, the chip area ratios of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, and the fifth LED chip 5 are (0.8 - 1):(0.8 - 1):(0.8 - 1):(0.8 - 1):(0.3 - 0.5). For example, the chip area ratios of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, and the fifth LED chip 5 can be 0.8:0.8:0.8:0.8:0.3 or 1:1:1:1:0.5 or 0.9:0.9:0.9:0.9:0.4.

[0055] It should be noted that the blue light hazard efficiency K B，V can be used for calculation, that is, the ratio of the blue light hazard weighted radiance L B to the corresponding photometric quantity. The calculation formula is:

[0056]

[0057] where K m = 683 lm / W, V(λ) is the spectral luminous efficiency (or visibility function), and B(λ) is the blue light hazard weighting function. K B，V characterizes the relative quantity value of the blue light component within the visible radiation. Under the condition of the same brightness of the lighting product, the higher K B，V is, the greater the possibility of the light source causing harm to the retina.

[0058] The following lists the photobiomodulation integrated high-power LED light sources formed by configuring the fluorescent glue 8 with different components.

[0059] In this embodiment, the fluorescent glue 8 is made of a 5000K fluorescent glue solution. The mass ratio of the components of the 5000K fluorescent glue solution is glue: blue powder with an emission peak wavelength of 450 - 470 nm: blue powder with an emission peak wavelength of 490 - 500 nm: green powder with an emission peak wavelength of 535 - 545 nm: red powder with an emission peak wavelength of 630 - 640 nm: infrared powder with an emission peak wavelength of 725 - 735 nm = 22:(1.3 - 1.8):(0.2 - 0.3):(3.4 - 3.9):(0.18 - 0.26):(2.8 - 3.3). Specifically, the mass ratio of glue: blue powder with an emission peak wavelength of 450 - 470 nm: blue powder with an emission peak wavelength of 490 - 500 nm: green powder with an emission peak wavelength of 535 - 545 nm: red powder with an emission peak wavelength of 630 - 640 nm: infrared powder with an emission peak wavelength of 725 - 735 nm can be 22:1.3:0.2:3.4:0.18:2.8 or 22:1.8:0.3:3.9:0.26:

[0060] 3.3 or 22:1.5:0.25:3.7:0.2:3

[0061] The spectral component analysis data of the photobiomodulation integrated high-power LED light source in this embodiment are as follows

[0062] Table 1:

[0063]

[0064] As can be seen from Table 1 above, for the photobiomodulation integrated high-power LED light source in this embodiment, its blue light content is 23.7% lower than that of sunlight at 5000K, having an eye protection effect; the infrared light component is 43.8% higher than that of sunlight, which helps cells absorb infrared light

[0065] The comparison of the spectral chromaticity parameters of the photobiomodulation integrated high-power LED light source in this embodiment with those of the 5000K sunlight spectrum is shown in Table 2 below

[0066]

[0067]

[0068] As can be seen from Table 2 above, the photobiomodulation integrated high-power LED light source in this embodiment has high color quality: 1. Color rendering index Ra>97, R1-R15>95; 2. Color quality index CQS>97; 3. Color tolerance sdcm<3; 4. TM-30-18, Rg>98, Rf>97, Rf, skin>97; 5. COI (acid glycoside index)<3.3; 6. Television lighting index TLCI-2012>99

[0069] The comparison of the important parameters of the photobiomodulation integrated high-power LED light source in this embodiment is shown in Table 3 below

[0070]

[0071]

[0072] Combined with Table 3 above, it can be seen that in the photobiomodulation integrated high-power LED light source of this embodiment, its S / P ratio (scotopic-to-photopic luminance ratio) is basically the same as that of sunlight at 5000K of the same color temperature, which is beneficial for the eyes to relax the viewing angle and create a comfortable and healthy light environment. The M / P ratio (mesopic luminance ratio) is basically the same as that of sunlight at 5000K of the same color temperature. The blue light is lower than that of sunlight, preventing blue light hazards. When used as a plant light source, the crop utilization rate is about 2% higher than that of sunlight of the same color temperature, which is beneficial to the growth and development of plants

[0073] The green phosphor with an emission wavelength of 450 - 470 nm involved in the above embodiments is a nitrogen oxide component, and the full width at half maximum is 50 - 65 nm; the green phosphor with an emission wavelength of 490 - 500 nm is a nitrogen oxide component, and the full width at half maximum is 60 - 80 nm; the green phosphor with an emission wavelength of 535 - 545 nm is Lu 3 Al 5 O 12 :Ce 3+ component, and the full width at half maximum is 95 - 105 nm; the red phosphor with an emission wavelength of 635 - 645 nm is CaAlSiN 3 :Eu component, and the full width at half maximum is 60 - 80 nm (to improve the product brightness); the infrared phosphor with an emission wavelength of 725 - 735 nm is Ga 4 GeO 8 :Cr 3+ component, and the full width at half maximum is 130 - 160 nm.

[0074] The standard elliptical parameters of the photobiomodulation integrated high-power LED light source in the above Embodiments 1 to 8 are shown in Table 4 below:

[0075]

[0076] The embodiments of the present invention also provide a preparation method for preparing the photobiomodulation integrated high-power LED light source of the above various embodiments, including the following steps:

[0077] S001: Import the coordinates of the first LED chip 1, the second LED chip 2, the third LED chip 3, the fourth LED chip 4, and the fifth LED chip 5 into the die bonding machine program, and fix each LED chip on the bracket with die bonding glue;

[0078] S002: Put the die-bonded material into an oven and bake it under the conditions of 160 ± 5 °C / 2 h ± 10 min;

[0079] S003: Wire the LED chips in a 28-series and 12-parallel series-parallel manner;

[0080] S004: After completing the wire bonding of the LED chips, light them with a microcurrent of a DC power supply (VF = 64 V, IF = 10 mA) and dehumidify them under the conditions of 130 ± 5 °C / 2 h ± 10 min;

[0081] S005: Configure the fluorescent glue solution, and centrifuge and defoam the fluorescent glue solution with a centrifuge defoaming machine;

[0082] S006: Perform dispensing of the fluorescent glue solution according to the color points and color parameters required by the design;

[0083] S007: After dispensing, perform low-temperature baking under the conditions of 45 ± 5 °C / 3 h ± 10 min to form phosphor precipitation from the fluorescent glue solution, thereby improving the binning rate and luminous flux;

[0084] S008: After phosphor precipitation is completed, perform high-temperature baking under the conditions of 160 ± 5 °C / 6 h ± 10 min;

[0085] S009: After high-temperature baking is completed, perform spectral splitting according to the given chromaticity coordinates and light color parameters;

[0086] S010: After spectral splitting is completed, light it with a high-temperature microcurrent of 100 ± 5 °C (VF = 64 V, IF = 10 mA) to determine whether the product has electrical defects;

[0087] S011: Label and store the qualified products.

[0088] 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 in the protection scope of the present invention.

Claims

1. A photobiomodulation integrated high-power LED light source, characterized in that: It comprises a bracket and 336 LED chips arranged on the bracket, the 336 LED chips are arranged in a circuit of 28 series and 12 parallel series, and the bracket is coated with fluorescent glue covering each of the LED chips; The 336 LED chips include a first LED chip with a peak wavelength of 410-415 nm, a second LED chip with a dominant wavelength of 440-445 nm, a third LED chip with a dominant wavelength of 450-455 nm, a fourth LED chip with a dominant wavelength of 465-470 nm, and a fifth LED chip with a dominant wavelength of 475-485 nm; the number ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, and the fifth LED chip is 2:8:8:8:2; The bracket includes a copper substrate, a boss is arranged on the substrate, the fifth LED chip is arranged on the boss, and the first LED chip, the second LED chip, the third LED chip and the fourth LED chip are all arranged at positions of the substrate staggered from the boss; The fluorescent glue is made of 5000K fluorescent glue solution, and the mass ratio of the components of the 5000K fluorescent glue solution is glue: blue powder with an emission peak wavelength of 450-470nm: blue powder with an emission peak wavelength of 490-500nm: green powder with an emission peak wavelength of 535-545nm: red powder with an emission peak wavelength of 630-640nm: infrared powder with an emission peak wavelength of 725-735nm = 22: (1.3-1.8): (0.2-0.3): (3.4-3.9): (0.18-0.26): (2.8-3.3); The photobiomodulation integrated high-power LED light source has a blue light content that is 23.7% lower than that of sunlight 5000K, and an infrared light component that is 43.8% higher than that of sunlight; a 380-500nm spectrum height of <0.8; a 0.55<500-680nm height of <0.65; a small wave peak exists in the 680-780nm spectrum and the peak wavelength is between 680-740nm; a color rendering index Ra>97, R1-R15>95; a color quality index COS>97; a color tolerance sdcm<3; TM-30-18, Rg>98, RP97, Rf, skin>97; and a COI (acid glycoside index)<3.

3.

2. The photobiomodulation integrated high-power LED light source according to claim 1, characterized in that: The chip area ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip is (0.8-1): (0.8-1): (0.8-1): (0.8-1): (0.3-0.5).

3. The photobiomodulation integrated high-power LED light source according to claim 1, characterized in that: The thickness of the substrate is 1.4-1.6 mm.

4. The photobiomodulation integrated high-power LED light source according to claim 3, characterized in that: The height of the boss is 0.08-0.12 mm.

5. A method for preparing the photobiomodulation integrated high-power LED light source according to any one of claims 1 to 4, characterized in that: The following steps are involved: S001: importing the coordinates of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip into a die-bonding machine program, and fixing each of the LED chips on the bracket with a die-bonding adhesive; S002: Place the solidified material in an oven and bake at 160±5℃ for 2h±10min; S003: welding the LED chips in a 28-in-12-in-parallel connection mode; S004: After completing the wire bonding of the LED chip, light it with a DC power supply with a micro current of VF=64V, IF=10mA, and dehumidify at 130±5℃ for 2h±10min; S005: preparing a fluorescent glue solution, and using a centrifugal degassing machine to centrifuge and degas the fluorescent glue solution; S006: dispensing the fluorescent glue solution according to the color point and color parameters required by the design; S007: After the dispensing is completed, low-temperature baking is performed at 45±5℃ for 3h±10min to precipitate the phosphor powder formed by the fluorescent glue solution to improve the binning rate and luminous flux; S008: After the phosphor precipitation is completed, high temperature baking is performed at 160±5℃ for 6h±10min; S009: After high temperature baking, perform light separation according to given chromaticity coordinates and light color parameters; S010: After the light is split, light it up with a high temperature of 100±5℃, VF=64V, IF=10mA micro current to determine whether the product has electrical defects; S011: Label the good products and put them into storage.

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