Low-light-pollution outdoor LED light source based on 630nm / 660nm single red light regulation and packaging process thereof

Abstract

The invention belongs to the technical field of LEDs, and particularly relates to a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light regulation and control and a packaging technology thereof.The low-light-pollution outdoor LED light source comprises a bowl cup type support, a support bowl cup and N LED wafers, the N LED wafers are arranged in a multi-string circuit mode, the periphery of the support bowl cup is coated with a TiO2 white glue layer, the interior of the support bowl cup is coated with fluorescent glue layers covering all the LED wafers, and the LED wafers are arranged in the support bowl cup. The fluorescent glue layer is in a convex cup shape, and the convex surface of the fluorescent glue layer is 0.1-0.5 mm higher than the edge plane of the support bowl cup; the N LED wafers comprise a red light LED wafer with the peak wavelength ranging from 620 nm to 670 nm and N-1 blue light LED wafers with the dominant wavelength ranging from 450 nm to 455 nm. According to the invention, low light pollution is adapted to the Darksky standard, outdoor colors are restored with high color rendering, the structural process guarantees stability, outdoor requirements are met with high energy efficiency, and the LED lamp is widely applicable to various outdoor lighting scenes such as commercial streets, parks, residential areas and traffic roads.

Description

Technical Field

[0001] This invention belongs to the field of LED technology, and in particular relates to a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation and its packaging process. Background Technology

[0002] Darksky is an international organization that restores the nighttime environment and protects communities from the harmful effects of light pollution through outreach, advocacy, and conservation. Darksky's core objective is to control light pollution and maintain nighttime ecological balance and astronomical observation conditions. However, current outdoor LED lighting technology falls short of these needs, with specific challenges concentrated in three areas:

[0003] First, it is difficult to balance light pollution control and luminous efficiency. Existing outdoor light sources generally have an excessively high proportion of blue-violet light (350-500nm), which can easily interfere with the phototaxis of insects and the migratory rhythms of birds. Although some solutions reduce blue-violet light with additional filters, this results in a 15%-20% reduction in luminous efficiency, which violates the energy-saving requirements of outdoor lighting. At the same time, excessive infrared light (above 700nm) overflows, wasting electrical energy and generating unnecessary heat radiation, which damages the surrounding microenvironment.

[0004] Secondly, the color rendering index (CRI) is not well matched with the red light wavelength. Outdoor lighting needs to clearly reproduce the colors of traffic signs and buildings, but existing light sources generally have a CRI (Ra) of less than 80 and are not optimized for red light wavelengths. Either the red light band is missing, causing the red objects (such as red signs and flowers) to appear distorted; or the red light wavelength is not properly selected (not in the 630nm / 660nm range), which cannot form a compatible spectrum with the blue light chip, further reducing the color rendering effect and posing a threat to nighttime visual safety.

[0005] Third, the color temperature stability is poorly compatible with Darksky. The Darksky organization recommends warm color temperature light sources to reduce light interference at night, but the color temperature of existing outdoor LED light sources fluctuates greatly and it is difficult to maintain a stable warm color temperature range of 2200K; moreover, the design does not incorporate "single red light integration + specific wavelength control", resulting in an unbalanced spectral distribution. It cannot meet the color rendering requirements of Ra80, nor can it meet Darksky's standards of "low light pollution and high visual comfort".

[0006] In summary, current technology lacks an outdoor LED light source that can achieve "low blue-violet light / infrared overflow + Ra80 color rendering + stable warm color temperature of 2200K" through precise integration of single red light (630nm / 660nm) without additional filtering. This makes it difficult to meet the requirements of eco-friendliness, visual safety and energy saving. Therefore, targeted technological breakthroughs are urgently needed. Summary of the Invention

[0007] The purpose of this invention is to provide a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation and its packaging process, aiming to solve the technical problem that current outdoor LED light sources are difficult to balance "Darksky tissue adaptation, color rendering, luminous efficacy and color temperature stability".

[0008] To achieve the above objectives, this invention provides a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, comprising a bowl-shaped bracket, a bracket bowl disposed around the bowl-shaped bracket, and N LED chips located inside the bracket bowl and disposed on the bowl-shaped bracket. The N LED chips are arranged in a multi-string circuit. The bracket bowl is coated with a TiO2 white glue layer around its perimeter, and a fluorescent glue layer covering each LED chip is coated inside the bracket bowl. The fluorescent glue layer is cup-shaped, and the height of its convex surface is 0.1-0.5mm higher than the edge plane of the bracket bowl.

[0009] The N LED chips include one red LED chip with a peak wavelength of 620-670nm and N-1 blue LED chips with a main wavelength of 450-455nm.

[0010] The fluorescent adhesive layer is made of a 2200K fluorescent adhesive layer solution, and the mass ratio of the components of the 2200K fluorescent adhesive layer solution is glue: yellow powder with emission peak wavelength of 540-560nm: red powder with emission peak wavelength of 640-660nm = 16: (29-31): (2.9-3.1).

[0011] The bare-chip spectrum of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is described. Under the specified band, the following relationship is satisfied:

[0012] , where: 18≤ ≤22, 18≤ ≤25, 447.5≤ ≤455, 620≤ ≤670, normalized for the range of 350-800nm;

[0013] The relative spectrum of the finished product based on the 630nm / 660nm single red light modulated low light pollution outdoor LED light source satisfies the following relationship in the wavelength band of 350≤λ≤800:

[0014] , where: 18≤ ≤22, 18≤ ≤25, 447.5≤ ≤455, 620≤ ≤670, , The range of 350-800 nm was normalized.

[0015] The outdoor LED light source based on 630nm / 660nm single red light modulation low light pollution has a blue light content of <1%, an infrared content of <5%, Ra>80, and a special color rendering index R9>15;

[0016] The color temperature of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is 2100-2300K, the coordinates fall within the 22S color gamut, the dark vision / light vision ratio S / Pratio<0.9, and the non-visual / light vision ratio M / Pratio<0.25.

[0017] Furthermore, the cup-shaped bracket includes a bracket back plating layer, a bracket copper layer, and a functional area electroplating layer stacked together, and each of the LED chips is disposed on the functional area electroplating layer.

[0018] Furthermore, the back coating of the bracket is made by using a nickel-silver process on a copper substrate, which involves flash plating copper, then nickel plating, and finally silver plating, with a silver thickness ranging from 2 to 3 μm.

[0019] The copper layer of the bracket is made of C194 red copper with a thickness of 0.2-0.3mm;

[0020] The functional area electroplating layer is made on a copper substrate using a nickel-silver process, which involves flash plating copper, then nickel plating, and finally silver plating, with a silver thickness ranging from 3 to 5 μm.

[0021] Furthermore, the functional area electroplating layer is provided with a support functional area and a support electrode area, and multiple LED chips are disposed on the support functional area. The red LED chip is located at the center of the support functional area and is connected to the positive and negative electrodes of the support electrode area by wire bonding.

[0022] The TiO2 white adhesive layer is evenly distributed in the edge area of ​​the bracket cup by dispensing or spraying equipment, and flows freely on the entire encapsulation surface to form a concave structure with a higher outer surface and a lower inner surface. The lowest plane of the TiO2 white adhesive layer is 1-3 μm lower than the highest plane of the LED chip, and the angle formed by the tangent of the concave surface of the TiO2 white adhesive layer and the horizontal line is less than 45 degrees.

[0023] Furthermore, the TiO2 white glue layer is formed by preparing a white glue solution, wherein the white glue solution is prepared by mixing TiO2 powder and silica gel in a ratio of (1-10) g: 100 g.

[0024] Furthermore, the yellow powder with an emission peak wavelength of 540-560nm is Composition, half-width at half-maximum (WWHM) of 70-90 nm;

[0025] The red powder with a peak emission wavelength of 640-660nm is of CaAlSiN3:Eu composition and has a half-width of 80-120nm.

[0026] Furthermore, the components of the support bowl cup include: 65%-75% PCT resin, 25%-35% glass fiber, 0.2%-0.5% carbon nanotubes, 0.1%-0.3% benzotriazole, and 0.3%-0.6% UV stabilizer.

[0027] This invention also provides a packaging process for a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, which includes the following steps:

[0028] S100: N LED chips are placed on the functional area electroplating layer of the cup-shaped bracket and fixed with insulating glue or silver paste using a die bonder. The N LED chips include one red LED chip with a peak wavelength of 620-670nm and N-1 blue LED chips with a main wavelength of 450-455nm. The blue LED chip is fixed with insulating glue and the red LED chip is fixed with silver paste. The red LED chip is placed in the center of the functional area electroplating layer. After die bonding, the LED chips are baked in an oven at 150-160℃ for 2 hours ± 10 minutes to completely fix each LED chip on the functional area electroplating layer.

[0029] S200: Using a gold wire bonding machine, each LED chip is connected in series to the positive and negative electrodes on the electroplated layer of the functional area;

[0030] S300: Prepare a white glue solution, wherein the white glue solution is prepared by mixing TiO2 powder and silica gel in a certain proportion;

[0031] S400: Pour the prepared white glue solution into the glue tank of the dispensing machine. After the glue and bubbles are removed, dispense the white glue solution into the edge area of ​​the bracket. After dispensing, bake at 80°C for 0.5 hours and then at 160°C for 10 minutes.

[0032] S500: Prepare a 2200K fluorescent adhesive solution. Pour the prepared 2200K fluorescent adhesive solution into the glue tank of the dispensing machine. After the glue and bubbles are removed, dispense the adhesive according to the required color area. After dispensing, bake at 80℃ for 1h±10min and then at 160℃ for 4h±10min.

[0033] S600: After baking, cut or thresh using a cutting or unloading device. After cutting or threshing, bake at 160℃ for 30 minutes. After baking, spectrally separate and tape according to the specified optical, color and electrical parameters.

[0034] The above-mentioned technical solutions of the 630nm / 660nm single red light-controlled low light pollution outdoor LED light source and its packaging process provided in the embodiments of the present invention have at least one of the following technical effects: The 630nm / 660nm single red light-controlled low light pollution outdoor LED light source provided in the embodiments of the present invention, through low light pollution to adapt to the Darksky standard, high color rendering to reproduce outdoor colors, structural process to ensure stability, high energy efficiency to meet outdoor needs, and precise color control to ensure engineering adaptability, has become an outdoor LED light source that takes into account "eco-friendly, visually realistic, stable performance, energy saving and practicality", and is widely applicable to various outdoor lighting scenarios such as commercial streets, parks, residential areas, and traffic roads. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the front structure of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, provided in an embodiment of the present invention.

[0037] Figure 2 This is a cross-sectional view of the structure of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, provided for an embodiment of the present invention.

[0038] Figure 3 The bare-chip spectrum simulation diagram of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided for an embodiment of the present invention.

[0039] Figure 4 The bare-chip spectrum of an embodiment of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided in this invention.

[0040] Figure 5 The bare-chip spectrum of another embodiment of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided in this invention.

[0041] Figure 6The spectral simulation diagram of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided for an embodiment of the present invention.

[0042] Figure 7 The spectrum of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided in Embodiment 1 of the present invention.

[0043] Figure 8 This is a light source spectrum test report diagram of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, provided in Embodiment 1 of the present invention.

[0044] Figure 9 The spectrum of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation provided in Embodiment 2 of the present invention is shown.

[0045] Figure 10 This is a light source spectrum test report diagram of a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, provided in Embodiment 2 of the present invention.

[0046] Figure 11 The chromaticity coordinate map provided in this embodiment of the invention is a diagram of the low light pollution outdoor LED light source based on 630nm / 660nm single red light modulation.

[0047] The following are the labeling elements in the figure:

[0048] 1—Red LED chip 2—Blue LED chip 3—Lead wire

[0049] 4—Functional area of ​​the support; 5—Bowl-shaped support; 6—TiO2 white adhesive layer

[0050] 7—Positive and negative electrode isolation strip; 8—Functional area electroplating layer; 9—Support copper layer

[0051] 10—Coating on the back of the bracket; 11—Bottling cup of the bracket; 12—Fluorescent adhesive layer. Detailed Implementation

[0052] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-11 The described embodiments are exemplary and intended to explain embodiments of the invention, and should not be construed as limiting the invention.

[0053] In one embodiment of the present invention, such as Figures 1-2As shown, a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is provided, which is compatible with Ra80 and 2200K. Through low light pollution to meet the Darksky standard, high color rendering to reproduce outdoor colors, high energy efficiency to meet energy-saving requirements, and stable color temperature and chromaticity to enhance the visual experience, it becomes an outdoor LED light source that combines "eco-friendliness, true color, energy saving, and visual comfort," suitable for various outdoor lighting scenarios requiring Darksky standards, such as commercial streets, parks, residential areas, and areas surrounding ecological reserves.

[0054] The present invention relates to a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, which can achieve the following specific objectives:

[0055] Achieving low light pollution and compatibility with Darksky tissue: No additional filtering devices are required. By controlling the proportion of blue-violet light (350-500nm), suppressing infrared light (above 700nm) leakage, and maintaining a stable warm color temperature of 2200K, interference with nighttime ecology (plant and animal rhythms) and astronomical observations is reduced, thus meeting the core requirements of Darksky tissue.

[0056] Ensuring high color rendering and visual safety: By integrating 630nm / 660nm single red light and forming a compatible spectrum with the blue light chip, the general color rendering index (Ra) is stably increased to over 80, accurately restoring the color of red objects (such as traffic signs and red building decorations), solving the problem of color distortion in existing light sources, and improving the visual clarity and safety of outdoor nighttime.

[0057] Balancing high energy efficiency and performance stability: While achieving low light pollution and high color rendering, it avoids light efficiency loss and ensures that the light source's light performance meets the energy-saving requirements of outdoor lighting; at the same time, through precise control of single red light wavelength and circuit optimization, it ensures long-term stability of parameters such as color temperature and color rendering index, avoids performance fluctuations, and adapts to complex outdoor use environments.

[0058] Specifically, the 630nm / 660nm single red light modulated low light pollution outdoor LED light source includes a bowl-shaped bracket 5, a bracket bowl 11 disposed around the bowl-shaped bracket 5, and N LED chips located inside the bracket bowl 11 and disposed on the bowl-shaped bracket 5. The N LED chips are arranged in a multi-string circuit. The bracket bowl 11 is coated with a TiO2 white glue layer 6 around its perimeter, and a fluorescent glue layer 12 is coated inside the bracket bowl 11 and covers each of the LED chips. The fluorescent glue layer 12 is cup-shaped, and its convex surface height is 0.1-0.5mm higher than the edge plane of the bracket bowl 11. The N LED chips include one red LED chip 1 with a peak wavelength of 620-670nm and N-1 blue LED chips 2 with a main wavelength of 450-455nm. The fluorescent adhesive layer 12 is made of a 2200K fluorescent adhesive layer solution, and the mass ratio of the components of the 2200K fluorescent adhesive layer solution is glue: yellow powder with emission peak wavelength of 540-560nm: red powder with emission peak wavelength of 640-660nm = 16: (29-31): (2.9-3.1).

[0059] In this embodiment, a "convex cup dispensing process" is adopted, where the convex surface of the fluorescent adhesive layer 12 is higher than the edge plane of the support cup 11. By precisely mixing yellow and red powders, and in conjunction with a red light chip, spectral uniformity is achieved at color temperatures of 1800-2500K, while preventing blue light leakage and controlling light pollution. Specifically, the ratio of adhesive to yellow powder with an emission peak wavelength of 540-560nm to red powder with an emission peak wavelength of 640-660nm can be 16:29:2.9, 16:31:3.1, or 16:30:3.

[0060] Furthermore, the bare-chip spectrum of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation satisfies the following relationship in the wavelength band of 350≤λ≤800:

[0061] , where: 18≤ ≤22, 18≤ ≤25, 447.5≤ ≤455, 620≤ ≤670, normalized for the range of 350-800nm; such as Figure 3 As shown, a bare-chip spectrum simulation diagram of the LED light source according to an embodiment of the present invention is obtained.

[0062] From the simulated spectra above, we can obtain: 10 ≤ Φe (400-500 nm): Φe (600-700 nm) ≤ 40, see [reference]. Figures 4-5In Example 1, Φe (400-500nm): Φe (600-700nm) is in the range of (30-36); in Example 2, Φe (400-500nm): Φe (600-700nm) is in the range of (17-25).

[0063] Furthermore, the relative spectrum of the finished product based on the 630nm / 660nm single red light modulated low light pollution outdoor LED light source satisfies the following relationship in the wavelength band of 350≤λ≤800:

[0064] , where: 18≤ ≤22, 18≤ ≤25, 447.5≤ ≤455, 620≤ ≤670, , The wavelength range of 350-800 nm is normalized to obtain the simulated spectrum of the finished LED light source of the present invention. Figure 6 The test report is shown in Table 1 below:

[0065]

[0066] Table 1

[0067] Based on the data analysis in Table 1 above, and Figure 6 The spectral parameters of this invention show that the LED light source in this embodiment exhibits excellent performance in four dimensions: light pollution control, color rendering performance, energy efficiency and visual efficacy, and color temperature and chromaticity stability.

[0068] I. Precise control of light pollution to meet the requirements of the Darksky organization.

[0069] The proportion of blue-violet and infrared light has been optimized: the proportion of blue-violet light in the 350-500nm band is stable at 0.40%-0.84% ​​(<1%), and the proportion of infrared light in the 700-800nm ​​band is controlled at 6.99%-7.23% (<10%), which is far lower than the industry standard. This effectively avoids blue-violet light from interfering with the rhythms of plants and animals and infrared light from causing thermal pollution, which is in line with the Darksky organization's core requirement of "low light pollution".

[0070] Second, it has high color rendering and accurately reproduces outdoor colors.

[0071] Generally, the color rendering index (Ra) is stable at 80.3-83.6, which meets the basic requirements for color reproduction in outdoor scenarios;

[0072] With a special color rendering index (R9) of 44.6-51.6>15, it has a significant ability to render saturated red objects (such as traffic signs and red building decorations), solving the problem of color distortion of red objects in existing outdoor light sources and improving nighttime visual safety.

[0073] III. High energy efficiency and optimized visual effects.

[0074] The light efficiency ratio (LER) is maintained at 277-284Lm / W, which is a relatively high level of energy efficiency among outdoor LED light sources, achieving "high brightness output + low power consumption" and meeting the energy-saving requirements of outdoor lighting.

[0075] The S / Pratio (scotopic / photopic vision ratio) is 0.79-0.82 (<0.9), and the M / Pratio (non-visual / photopic vision ratio) is 0.217-0.229 (<0.25), which optimizes the visual experience in low-light environments at dusk and night, ensuring the visual comfort and safety of pedestrians and vehicles.

[0076] IV. Excellent color temperature and color stability.

[0077] The color temperature (CCT) is stable in the warm color temperature range of 2100-2300K, the color shift parameter (Duv) is controlled between 0.009 and 0.015, and the chromaticity consistency is good (small fluctuations in ccx and ccy). This avoids the interference of light environment caused by color temperature drift and color shift, and further meets the Darksky organization's requirements for "visual comfort".

[0078] In summary, the LED light source of this invention adapts to the Darksky standard with low light pollution, reproduces outdoor colors with high color rendering, ensures energy saving with high energy efficiency, and enhances the visual experience with stable color temperature and chromaticity. It has become an outdoor LED light source that takes into account "eco-friendly, true color, energy-saving and practical, and visually comfortable", and is suitable for various outdoor lighting scenarios such as commercial streets, parks, and residential areas.

[0079] In this embodiment, the blue light content of the low light pollution outdoor LED light source based on 630nm / 660nm single red light modulation is <1%, the infrared content is <10%, Ra>80, and the special color rendering index R9>15;

[0080] Furthermore, the color temperature of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is 2100-2300K, the coordinates fall within the 22S color gamut, the dark vision / light vision ratio S / Pratio<0.9, and the non-visual / light vision ratio M / Pratio<0.25.

[0081] Example 1:

[0082] (1) Chips: 2 blue LED chips of 450-455nm + 1 red LED chip of 625-630nm;

[0083] (2) The bare-chip spectrum meets the bare-chip spectrum relationship requirements of LED light sources;

[0084] (3) The finished product test data and report of the LED light source are shown in Table 2 below:

[0085]

[0086] Table 2

[0087] The spectrum of Example 1 is shown below. Figure 7 The test report can be found here. Figure 8 .

[0088] Example 2:

[0089] (1) Chips: 2 blue LED chips of 450-455nm + 1 red LED chip of 655-665nm;

[0090] (2) The bare-chip spectrum meets the bare-chip spectrum relationship requirements of LED light sources;

[0091] (3) The test data and report of the finished LED light source are shown in Table 3 below:

[0092]

[0093] Table 3

[0094] The spectrum of Example 1 is shown below. Figure 9 The test report can be found here. Figure 10 .

[0095] The chromaticity coordinates of the light source in this embodiment of the invention fall within the 22S range, as shown in Table 4 below:

[0096]

[0097] Table 4

[0098] The coordinate diagram of the landing point of the LED light source in this embodiment of the invention is as follows: Figure 11 Show.

[0099] In this embodiment, as Figure 2 As shown, the cup-shaped bracket 5 includes a bracket back plating layer 10, a bracket copper layer 9, and a functional area electroplating layer 8, which are stacked together. Each of the LED chips is disposed on the functional area electroplating layer 8. The bracket copper layer 9 adopts a double-leg convex structure design to increase the bracket's bending resistance, while preventing moisture and humidity from entering, thus improving the product's airtightness.

[0100] Furthermore, the support cup 11 is made of 65%-75% PCT resin, 25%-35% glass fiber, 0.2%-0.5% carbon nanotubes, 0.1%-0.3% benzotriazole, and 0.3%-0.6% UV stabilizer to increase UV aging resistance, product brightness, and flexural strength.

[0101] In this embodiment, the back plating layer 10 of the bracket is formed on a copper substrate using a nickel-silver plating process, which involves flash plating copper, followed by nickel plating, and then silver plating, with the silver thickness ranging from 2 to 3 μm; thus forming a three-layer structure, the silver thickness can range from 2 μm, 2.5 μm, or 3 μm. The copper layer 9 of the bracket is made of C194 red copper with a thickness of 0.2-0.3 mm; for example, the thickness of C194 red copper can be 0.2 mm, 0.25 mm, or 0.3 mm.

[0102] Furthermore, the functional area electroplating layer 8 is formed on a copper substrate using a nickel-silver process, which involves flash plating copper, followed by nickel plating, and then silver plating, with a silver thickness ranging from 3 to 5 μm. The functional area electroplating layer 8 also forms a three-layer structure, with a silver thickness ranging from 3 μm, 4 μm, or 5 μm.

[0103] In this embodiment, the functional area electroplating layer 8 has a support functional area 4 and a support electrode area. Multiple LED chips are disposed on the support functional area 4. The red LED chip 1 is located near the center of the support functional area 4 and is bonded to the positive and negative electrodes of the support electrode area via lead wires 3. See [link to relevant documentation]. Figure 2 The cup-shaped bracket 5 is equipped with positive and negative electrode isolation strips 7, which adopt a double inverted trapezoidal design to increase the bending resistance of the cup-shaped bracket 5, while preventing moisture and humidity from entering, thus improving the airtightness of the LED light source product.

[0104] Furthermore, the TiO2 white adhesive layer 6 is evenly distributed within the edge area of ​​the bracket cup 11 using dispensing or spraying equipment, and after free-flowing across the entire encapsulation surface, forms a concave structure with a higher outer surface and a lower inner surface. The lowest plane of the TiO2 white adhesive layer 6 is 1-3 μm lower than the highest plane of the LED chip, for example, 1 μm, 2 μm, or 3 μm. Furthermore, the angle formed by the tangent of the concave surface of the TiO2 white adhesive layer 6 and the horizontal line is less than 45 degrees, for example, 35 degrees, 40 degrees, or 44 degrees. This improves light extraction efficiency, thereby increasing luminous efficacy.

[0105] In this embodiment, the TiO2 white glue layer 6 is formed by preparing a white glue solution, which is formed by mixing TiO2 powder and silica gel in a ratio of (1-10) g: 100 g. Specifically, the TiO2 powder and silica gel can be mixed in a ratio of 1 g: 100 g, 10 g: 100 g, or 5 g: 100 g.

[0106] In this embodiment, the yellow powder with an emission peak wavelength of 540-560nm is The composition has a half-width of 70-90 nm. The red powder with an emission peak wavelength of 640-660 nm is of the CaAlSiN3:Eu composition, with a half-width of 80-120 nm.

[0107] This invention also provides a packaging process for a low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation, which includes the following steps:

[0108] S100: N LED chips are placed on the functional area electroplating layer 8 of the cup-shaped bracket 5 and fixed with insulating glue or silver paste using a die bonder. The N LED chips include one red LED chip 1 with a peak wavelength of 620-670nm and N-1 blue LED chips 2 with a main wavelength of 450-455nm. The blue LED chip is fixed with insulating glue and the red LED chip is fixed with silver paste. The red LED chip 1 is placed in the center of the functional area electroplating layer 8. After die bonding, the LED chips are baked in an oven at 150-160℃ for 2 hours ± 10 minutes to completely fix each LED chip on the functional area electroplating layer 8.

[0109] S200: Using a gold wire bonding machine, bonding wires 3 are used to bond each LED chip in series with the positive and negative electrodes on the electroplated layer 8 of the functional area.

[0110] S300: Prepare a white glue solution, wherein the white glue solution is prepared by mixing TiO2 powder and silica gel in a certain proportion;

[0111] S400: Pour the prepared white glue solution into the glue tank of the dispensing machine. After the glue and bubbles are removed, dispense the white glue solution into the edge area of ​​the bracket. After dispensing, bake at 80°C for 0.5 hours and then at 160°C for 10 minutes.

[0112] S500: Prepare a 2200K fluorescent adhesive solution. Pour the prepared 2200K fluorescent adhesive solution into the glue tank of the dispensing machine. After the glue and bubbles are removed, dispense the adhesive according to the required color area. After dispensing, bake at 80℃ for 1h±10min and then at 160℃ for 4h±10min.

[0113] S600: After baking, cut or thresh using a cutting or unloading device. After cutting or threshing, bake at 160℃ for 30 minutes. After baking, spectrally separate and tape according to the specified optical, color and electrical parameters.

[0114] In summary, the advantages of the technical solution, data, and application scenarios of this invention can be systematically summarized from five dimensions: low light pollution adaptability, high color rendering index, innovative structural process, energy efficiency and visual efficacy, and color stability.

[0115] I. Precisely adapted to Darksky tissue, with significant low light pollution characteristics.

[0116] The spectrum composition is strictly controlled: the 350-500nm blue-violet light band accounts for only 0.40%-0.84% ​​(far below 1%), and the 700-800nm ​​infrared band accounts for 6.99%-7.23% (far below 10%), effectively avoiding interference of blue-violet light with the biological clock of plants and animals and thermal pollution caused by infrared light, which fully meets Darksky's core demand of "nighttime eco-friendly".

[0117] Warm color temperature and color shift optimization: The color temperature (CCT) is stabilized in the warm color temperature range of 2147-2263K, and the color shift parameter (Duv) is controlled between 0.008-0.0121 to avoid light pollution caused by cool color temperature glare and color shift, and to ensure the comfort of the nighttime light environment.

[0118] Second, it has high color rendering and can accurately reproduce the colors of outdoor scenes.

[0119] The general color rendering index (Ra) is stable between 80.3 and 83.6, while the special color rendering index R9>20 shows a significant ability to render red objects (such as traffic signs, red building decorations, and flowers). In outdoor commercial streets, landscape lighting, and other scenarios, it can realistically reproduce the colors of objects, enhancing the visual experience and nighttime visual safety.

[0120] III. Structural and process innovations ensure performance stability.

[0121] Support and packaging design: It adopts a structure of "double inverted trapezoidal positive and negative electrode isolation strips + double-leg convex red copper layer", which has both high bending resistance and moisture-proof and airtightness; the cup contains carbon nanotubes, anti-UV agents, etc., to improve anti-aging and thermal conductivity, and is suitable for complex outdoor environments.

[0122] TiO2 white adhesive layer and convex cup dispensing: The TiO2 white adhesive layer has a "concave structure with a high outer surface and a low inner surface" (angle <45°), which improves the light extraction efficiency; the fluorescent adhesive adopts "convex cup dispensing" (convex surface height 0.1-0.5mm) to ensure the uniformity of light emission and prevent blue light leakage, thus controlling light pollution from a structural level.

[0123] IV. High energy efficiency and optimized visual effects.

[0124] With a visual efficiency (LER) of 277-284Lm / W, it is considered a high-efficiency outdoor LED light source, achieving "high brightness output + low power consumption" and meeting the energy-saving needs of road, landscape and other scenarios.

[0125] Visual performance parameters: S / Pratio (scotopic vision / photopic vision ratio) reaches 0.79-0.82<0.9, M / Pratio (non-visual vision / photopic vision ratio) reaches 0.217-0.229<0.25, improving visual comfort in low-light environments at dusk and night, and ensuring visual safety for pedestrians and vehicles.

[0126] 5. The color coordinates fall precisely within the 22-second range, demonstrating excellent color consistency.

[0127] The chromaticity coordinates (ccx, ccy) of this invention are precisely matched to the "22S" chromaticity region. The chromaticity deviation is minimal in different embodiments, ensuring the uniformity of light color during mass production. It is suitable for large-scale outdoor lighting projects (such as urban landscape belts and commercial districts) with high requirements for light color consistency.

[0128] In summary, this invention achieves low light pollution to meet the Darksky standard, high color rendering to reproduce outdoor colors, stable structure and process, high energy efficiency to meet outdoor needs, and precise color control for engineering compatibility. It is an outdoor LED light source that combines "eco-friendliness, visual realism, stable performance, and energy saving and practicality," and is widely applicable to various outdoor lighting scenarios such as commercial streets, parks, residential areas, and traffic roads.

[0129] 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 within the protection scope of the present invention.

Claims

1. A 630 nm / 660 nm single red light based regulation low light pollution outdoor LED light source, characterized in that, The device includes a bowl-shaped support, a support bowl disposed around the bowl-shaped support, and N LED chips located inside the support bowl and disposed on the bowl-shaped support. The N LED chips are arranged in a multi-string circuit. The support bowl is coated with a TiO2 white glue layer around its perimeter, and a fluorescent glue layer covering each LED chip is coated inside the support bowl. The fluorescent glue layer is cup-shaped, and the height of its convex surface is 0.1-0.5 mm higher than the edge plane of the support bowl. The N LED chips include one red LED chip with a peak wavelength of 620-670nm and N-1 blue LED chips with a main wavelength of 450-455nm. The fluorescent adhesive layer is made of a 2200K fluorescent adhesive layer solution, and the mass ratio of the components of the 2200K fluorescent adhesive layer solution is glue: yellow powder with emission peak wavelength of 540-560nm: red powder with emission peak wavelength of 640-660nm = 16: (29-31): (2.9-3.1). The bare-chip spectrum of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation satisfies the following relationship in the wavelength band of 350≤λ≤800: wherein: 18≤ ≤22, 18≤ ≤25, 447.5≤ ≤455, 620≤ ≤670, normalized over 350-800 nm. The relative spectrum of the finished product based on the 630nm / 660nm single red light modulated low light pollution outdoor LED light source satisfies the following relationship in the wavelength band of 350≤λ≤800: wherein: , , normalized from 350-800 nm; The outdoor LED light source based on 630nm / 660nm single red light modulation low light pollution has a blue light content of <1%, an infrared content of <10%, Ra>80, and a special color rendering index R9>15; The color temperature of the low-light-pollution outdoor LED light source based on 630nm / 660nm single red light modulation is 2100-2300K, the coordinates fall within the 22S color gamut, the dark vision / light vision ratio S / Pratio<0.9, and the non-visual / light vision ratio M / Pratio<0.

25.

2. The 630 nm / 660 nm single red light based regulated low light pollution outdoor LED light source according to claim 1, characterized in that, The cup-shaped bracket includes a bracket back plating layer, a bracket copper layer, and a functional area electroplating layer stacked together, and each of the LED chips is disposed on the functional area electroplating layer.

3. The 630 nm / 660 nm single red light based regulated low light pollution outdoor LED light source according to claim 2, characterized in that, The back coating of the bracket is made by using a nickel-silver process on a copper substrate, which involves flash plating copper, then nickel plating, and then silver plating, with a silver thickness ranging from 2 to 3 μm. The copper layer of the bracket is made of C194 red copper with a thickness of 0.2-0.3mm; The functional area electroplating layer is made on a copper substrate using a nickel-silver process, which involves flash plating copper, then nickel plating, and finally silver plating, with a silver thickness ranging from 3 to 5 μm.

4. The 630 nm / 660 nm single red light based low light pollution outdoor LED light source regulated according to claim 2, characterized in that, The functional area electroplating layer has a support functional area and a support electrode area. Multiple LED chips are disposed on the support functional area. The red LED chip is located in the support functional area towards the center and is connected to the positive and negative electrodes of the support electrode area by wire bonding. The TiO2 white glue layer is uniformly distributed in the edge area of the bracket bowl cup by the dispensing or spraying equipment, and is free to flow on the entire packaging surface to form a concave surface structure with high outside and low inside. The lowest plane of the TiO2 white glue layer is 1-3 μm lower than the highest plane of the LED wafer, and the angle formed by the tangent of the concave surface of the TiO2 white glue layer and the horizontal line is less than 45 degrees.

5. The 630 nm / 660 nm single-red light based low light pollution outdoor LED light source regulated according to claim 4, characterized in that, The TiO2 white glue layer is formed by configuring a white glue solution, and the white glue solution is prepared by mixing TiO2 powder and silica gel in a ratio of (1-10) g:100 g.

6. The 630 nm / 660 nm single-red light based low light pollution outdoor LED light source of claim 1, wherein, The yellow powder having an emission peak wavelength of 540-560 nm is a component having a half-wave width of 70-90 nm; The red powder with an emission peak wavelength of 640-660 nm is CaAlSiN3:Eu component, and the half wave width is 80-120 nm.

7. The 630 nm / 660 nm single-red light based low light pollution outdoor LED light source of claim 1, wherein, The component quality of the bracket bowl cup includes: 65%-75% of PCT resin, 25%-35% of glass fiber, 0.2%-0.5% of carbon nanotube, 0.1%-0.3% of benzotriazole, and 0.3%-0.6% of anti-UV agent.

8. A packaging process for regulating low light pollution outdoor LED light source based on 630 nm / 660 nm single red light, characterized by, The method comprises the following steps: S100: N LED wafers are arranged on the functional area electroplating layer of the bowl cup bracket, and are fixed by die bonding machine with die bonding glue or silver glue. N LED wafers include one red light LED wafer with a peak wavelength of 620-670 nm and N-1 blue light LED wafers with a main wavelength of 450-455 nm. The blue light wafer is fixed by die bonding glue, and the red light wafer is fixed by silver glue. The red light LED wafer is placed at the center of the functional area electroplating layer. After die bonding, the oven is baked at a temperature of 150-160°C for 2h±10min, so that each LED wafer is completely fixed on the functional area electroplating layer; S200: Each LED wafer is connected to the positive and negative electrodes on the functional area electroplating layer in series by using a gold wire bonding machine to bond the lead wire; S300: A white glue solution is prepared, and the white glue solution is prepared by mixing TiO2 powder and silica gel in a certain ratio; S400: The prepared white glue solution is poured into the glue barrel of the dispensing machine. After the glue and bubble are discharged, the white glue solution is dispensed in the edge area of the bracket. After dispensing, it is first baked at 80°C for 0.5h, and then baked at 160°C for 10min; S500: A 2200K fluorescent glue solution is prepared. The prepared 2200K fluorescent glue solution is poured into the glue barrel of the dispensing machine. After the glue and bubble are discharged, the dispensing is carried out according to the required color area. After dispensing, it is first baked at 80°C for 1h±10min, and then baked at 160°C for 4h±10min; S600: After baking, cutting or degermination is carried out by using cutting or degermination equipment. After cutting or degermination, it is baked at 160°C for 30min. After baking, the light color and electrical parameters are divided according to the specified light color and electrical parameters, and the band is coded.

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