LED structure for plant illumination
By designing LED chips and scaffold structures covering multiple spectral ranges, the problem of the lack of green and infrared light in LED plant lighting systems is solved, and spectral parameters similar to natural light are achieved, which improves the growth efficiency of plants and human comfort.
Patent Information
- Application Number
- CN202421132013.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing LED plant lighting systems lack green and infrared light components, and cannot effectively simulate natural light, affecting the growth of plants.
A plant lighting LED structure was designed, which contains multiple LED chips, with peak wavelengths covering the spectral ranges of 725-735nm, 405-415nm, 440-445nm, 480-485nm, 450-455nm and 462-468nm, through scaffolding and fluorescence The combination of glue achieves uniform distribution of the spectrum.
Spectral parameters similar to natural sunlight are achieved, the spectral utilization and yield of plants are improved, the comfortable lighting needs of humans are met, and the blue light exemption standards are met.
Smart Images
Figure CN222440606U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of LEDs, in particular to an LED structure for plant lighting. Background Art
[0002] The 21st century is the century of ecological agriculture, and physical agriculture is one of the main technical ways to achieve ecological agriculture. Among the many physical technical means, optical technology plays a vital role. The "century of light" in modern agriculture has quietly arrived, and the research and development of energy-saving and high-efficiency light sources such as LEDs has also become the primary issue that needs to be solved to achieve the development of plant production in artificial light facilities.
[0003] The current mainstream technology uses red light and blue light to grow plants, but ignores the effects of green light and infrared light on plant growth. Utility Model Content
[0004] The utility model mainly solves the problem that existing LED plant lighting lacks green light and infrared light components, and provides an LED structure for plant lighting, which can perfectly match the LED light source of actual sunlight, so as to be applied to plant lighting and achieve high-yield, high-efficiency and high-comfort growth of plants.
[0005] The utility model adopts the following technical solutions to solve the above technical problems:
[0006] An LED structure for plant lighting, comprising a bracket and a plurality of LED chips, wherein the bracket comprises a conductive bottom plate and an insulating plastic outer frame arranged on the outer periphery of the conductive bottom plate, wherein the insulating plastic outer frame and the conductive bottom plate form a bowl cup, wherein a waterproof groove is arranged in the middle of the conductive bottom plate to separate the bowl cups into a symmetrical structure, wherein an isolation belt is arranged in the waterproof groove, wherein a plurality of the LED chips are arranged on the conductive bottom plate, and wherein a fluorescent glue coated on each of the LED chips is arranged in the bowl cup;
[0007] The multiple LED chips include a first LED chip with a peak wavelength of 725-735nm, a second LED chip with a peak wavelength of 405-415nm, a third LED chip with a main wavelength of 440-445nm, a fourth LED chip with a main wavelength of 480-485nm, a fifth LED chip with a main wavelength of 450-455nm and a sixth LED chip with a main wavelength of 462-468nm.
[0008] Optionally, the isolation belt is in an I-shape, and the upper edge of the I-shaped isolation belt abuts against the upper surface of the conductive bottom plate, and the lower edge is flush with the lower surface of the conductive bottom plate.
[0009] Optionally, the conductive base plate includes a copper substrate and a nickel layer and a silver layer disposed on the copper substrate.
[0010] Optionally, the copper substrate has a thickness of 0.25 mm, the nickel layer has a thickness of 0.025 μm, and the silver layer has a thickness of 0.25 μm.
[0011] Optionally, the number of the first LED chip is one, the number of the second LED chip is one, the number of the third LED chip is two, the number of the fourth LED chip is one, the number of the fifth LED chip is two, and the number of the sixth LED chip is two;
[0012] The first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip and the sixth LED chip are connected in series with the positive and negative electrodes of the bracket.
[0013] Optionally, the symmetrical bowl is divided into a first side and a second side, and the first side of the bowl is provided with the first LED chip, the second LED chip, the third LED chip, the fifth LED chip and the sixth LED chip, and the second side of the bowl is provided with the fourth LED chip, the third LED chip, the fifth LED chip and the sixth LED chip.
[0014] Optionally, the area ratio of the chips used in the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip and the sixth LED chip is: (0.3-0.5): (0.8-1): (0.8-1): (0.8-1): (0.8-1): (0.8-1)
[0015] Compared with the prior art, the LED structure for plant lighting of the utility model has the same parameters of S / Pratio and M / P ratio of the packaged finished product as those of sunlight with the same color temperature, providing clear vision and soft and beautiful visual experience. It can be used as an auxiliary lighting source for humans while being applied to plant lighting. Moreover, the SSI (350-800nm) of the packaged finished product is greater than 93%, with excellent spectral similarity parameters, restoring the color of natural light, allowing people to experience nature, while also providing natural light nutrients for plants and increasing output value. The crop photon utilization rate is greater than 89%, and the German standard crop output utilization rate is greater than 70%, which is beneficial to increasing crop yield. The plant chlorophyll a utilization rate of the packaged finished product is greater than 9%, which is 5.7% higher than that of sunlight with the same color temperature, and the plant chlorophyll b utilization rate is greater than 4.2%, which is 13.9% higher than that of sunlight with the same color temperature, which is beneficial to increasing the production capacity and output of plants. The blue light hazard efficiency KB, V = 0.000757646, which is lower than the blue light hazard efficiency KB, V of sunlight with the same color temperature, and meets the blue light exemption RG0 standard. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a front structural schematic diagram of the LED structure for plant lighting of the present utility model.
[0017] Figure 2 It is a schematic diagram of the back structure of the LED structure for plant lighting of the present utility model.
[0018] Figure 3 It is a multi-viewing plane combination cross-sectional view of the LED structure for plant lighting of the utility model.
[0019] Figure 4 It is a spectral power distribution curve diagram of the LED structure for plant lighting of the utility model.
[0020] Figure 5 It is a spectrum photon distribution curve diagram of the LED structure for plant lighting of the utility model.
[0021] Figure 6 This is a diagram of the calculation results of the spectrum plant parameters of the LED structure for plant lighting of the utility model.
[0022] Figure 7 This is a diagram of the spectral similarity (SSI) calculation results of the LED structure for plant lighting of the present invention.
[0023] Figure 8 This is a TM-30-18 calculation result diagram of the LED structure for plant lighting of the present utility model.
[0024] Fig. 9 It is a calculation result diagram of the color quality index (CQS), TM-30-18 and television lighting index (TLCI-2012) of the LED light source for plant lighting of the utility model.
[0025] Fig.10 This is a calculation result diagram of the absorption rate of chlorophyll a and chlorophyll b of plant LED plant lighting source of the utility model.
[0026] Fig.11 This is the calculation result of the absorption rate of chlorophyll a and chlorophyll b of plants at 5000K sunlight.
[0027] Fig.12 This is a test report of the LED structure for plant lighting of the utility model.
[0028] Fig.13 It is the required index of the chromaticity landing point bin diagram of the packaged finished product of the LED structure for plant lighting of the utility model.
[0029] Fig.14The utility model is a plant lighting LED structure with a blue light hazard efficiency of 5000K sunlight. B，V Comparison table.
[0030] Reference numerals:
[0031] 1-First LED chip 2-Second LED chip 3-Third LED chip
[0032] 4- the fourth LED chip 5- the fifth LED chip 6- the sixth LED chip
[0033] 7-Isolation belt 8-Stand 9-Bowl
[0034] 10-positive and negative pins 11-insulating plastic frame 12-conductive base plate
[0035] 13- Functional area 14- Waterproof groove. DETAILED DESCRIPTION
[0036] The following is combined with Figure 1-14 The technical solution of the utility model is further described in detail. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. Although this specification is described according to the implementation mode, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The various embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
[0037] like Figures 1 to 3 As shown, an LED structure for plant lighting provided by an embodiment of the utility model includes a bracket 8 and a plurality of LED chips, wherein the bracket 8 includes a conductive base plate 12 and an insulating plastic outer frame 11 arranged on the outer periphery of the conductive base plate 12, wherein the insulating plastic outer frame 11 and the conductive base plate 12 form a bowl cup 9, wherein a waterproof groove 14 is provided in the middle of the conductive base plate 12 for separating the bowl cups 9 into a symmetrical structure, wherein an isolation belt 7 is provided in the waterproof groove 14, wherein the plurality of LED chips are arranged on a functional area 13 of the conductive base plate 12, and wherein the bowl cup 9 is provided with fluorescent glue (not shown) coated on each of the LED chips.
[0038] Among them, the LED chips include a first LED chip 1 with a peak wavelength of 725-735nm, a second LED chip 2 with a peak wavelength of 405-415nm, a third LED chip 3 with a main wavelength of 440-445nm, a fourth LED chip 4 with a main wavelength of 480-485nm, a fifth LED chip 5 with a main wavelength of 450-455nm and a sixth LED chip 6 with a main wavelength of 462-468nm.
[0039] The LED structure for plant lighting of the utility model embodiment achieves the following relative spectral heights: 600-650nm>0.8, 650-730nm≥0.6, and 720-740nm peak spectral height≥0.7, with a peak wavelength of 460-480nm (see Figure 4 The chromaticity width is controlled within the third-order MacAdam ellipse (see Fig.13 ), the spectral similarity SSI (350-800nm) coefficient of the 5000K sunlight spectrum is >93% (see Figure 7 ). Color quality control requirements: meet Ra>95, R1-R15>90, TM-30-18, Rg>100, Rf>95, Rf, skin>95.
[0040] Preferably, the fluorescent glue is a mixture of blue powder with an emission wavelength of 490-505nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 630-640nm, red powder with an emission wavelength of 655-665nm, infrared fluorescent powder with an emission wavelength of 725-735nm and silica gel.
[0041] like Figure 3 As shown, the outer periphery of the bracket 8 is made of an insulating plastic frame 11. For example, PCT material can be used, which has the effect of improving light efficiency. EMC material can be used, which has the effect of improving the heat dissipation of the material. SMC material can be used, which has the effect of improving the heat dissipation of the material.
[0042] like Figure 3 As shown, the middle part surrounded by the insulating plastic frame 11 of the bracket 8 is a conductive bottom plate 12, and the conductive bottom plate 12 includes a copper material matrix (not shown) and a nickel layer (not shown) and a silver layer (not shown) arranged on the copper material matrix. The thickness of the copper material matrix is 0.25mm, the thickness of the nickel layer is 0.025μm, and the thickness of the silver layer is 0.25μm. Specifically, the conductive bottom plate 12 uses copper material as the matrix, and the thickness of the copper material is preferably 0.25mm. The copper material adopts the nickel-silver process, the nickel thickness is 0.025μm, and the silver thickness is 0.25μm, so that the brightness of the product can be improved.
[0043] like Figure 1 , 3 As shown, in another embodiment, a waterproof groove 14 is provided on the bracket 8, and the waterproof groove 14 isolates the conductive bottom plate 12 to form positive and negative electrodes, and the positive and negative electrodes have positive and negative electrode pins 10. An isolation belt 7 is provided in the waterproof groove 14, and the isolation belt 7 is used to isolate the positive and negative electrodes on the bracket 8 and can achieve waterproofing. In turn, the airtightness of the LED light source can be improved.
[0044] The comparison of the S / P ratio and M / Pratio of the LED structure for plant lighting provided by the embodiment of the utility model and the sunlight 5000K is shown in Table 1 below:
[0045]
[0046]
[0047] Table 1
[0048] As can be seen from Table 1, the LED structure for plant lighting in the embodiment of the utility model has the same S / Pratio and M / P ratio parameters of the packaged finished product as those of sunlight with the same color temperature, which provides a comfortable sense of vision, a clear vision, and a soft and beautiful visual experience. While being applied to plant lighting, it can also be used as an auxiliary lighting source for humans.
[0049] The spectral parameters of the finished packaged LED structure for plant lighting provided by the embodiment of the utility model are shown in Table 2 below:
[0050]
[0051] Table 2
[0052] The LED structure for plant lighting of the utility model meets the requirements of high color rendering, high SSI spectrum similarity, and the S / Pratio and M / P ratio parameters are the same as the spectrum of sunlight, and is well applied to bionic solar spectroscopy. It can also be applied to the fields of simulation identification and healthy lighting.
[0053] In one embodiment, the isolation belt 7 is in an I-shape, the upper edge of the I-shaped isolation belt 7 abuts against the upper surface of the conductive bottom plate 12, and the lower edge is flush with the lower surface of the conductive bottom plate 12. Such a structure can greatly improve the waterproof effect, thereby improving the airtightness of the LED light source.
[0054] Furthermore, the blue powder with an emission wavelength of 490-505 nm is Lu3Al5O 12 :Ce 3+ The component has a half-wave width of 50-60nm, specifically, the half-wave width is 50nm, 55nm or 60nm.
[0055] Furthermore, the green powder with an emission wavelength of 530-540 nm is Lu3Al5O 12 :Ce 3+ The component has a half-wave width of 90-110nm, specifically, the half-wave width is 90nm, 100nm or 110nm.
[0056] Furthermore, the red powder with an emission wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 65-75nm, specifically, the half-wave width is 65nm, 70nm or 75nm.
[0057] Furthermore, the red powder with an emission wavelength of 655-665nm is composed of CaAlSiN3:Eu, and has a half-wave width of 90-110nm, and the half-wave width is 90nm, 100nm or 110nm.
[0058] Furthermore, the infrared phosphor with an emission wavelength of 725-735 nm is Ga4GeO8:Cr 3+ , half-wave width is 140-160nm, half-wave width is 140nm, 150nm or 160nm.
[0059] Furthermore, the mass ratio of the silica gel: the blue powder with an emission wavelength of 490-505 nm: the green powder with an emission wavelength of 530-540 nm: the red powder with an emission wavelength of 630-640 nm: the red powder with an emission wavelength of 655-665 nm: the infrared phosphor with an emission wavelength of 725-735 nm is 3:
[0060] (0.05-0.15):(0.7-0.9):(0.01-0.03):(0.05-0.08):(0.3-0.5). The specific ratio can be 3:0.05:0.7:0.01:0.05:0.3 or 3:0.15:0.9:0.03:0.08:0.5 or 3:0.07:0.8:0.02:0.065:0.4.
[0061] Furthermore, the number of the first LED chip 1 is one, the number of the second LED chip 2 is one, the number of the third LED chip 3 is two, the number of the fourth LED chip 4 is one, the number of the fifth LED chip 5 is two, and the number of the sixth LED chip 6 is two. The bracket 8 adopts a symmetrical bowl cup 9 design, which can better place each LED chip and improve the heat dissipation performance of the product. Specifically, a first LED chip 1, a second LED chip 2, a third LED chip 3, a fifth LED chip 5 and a sixth LED chip 6 are placed on one side of the symmetrical cup, and a fourth LED chip 4, a third LED chip 3, a fifth LED chip 5 and a sixth LED chip 6 are placed on the other side of the symmetrical cup.
[0062] 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 and the sixth LED chip 6 are all arranged in a bowl cup 9 formed on the bracket 8 , and are connected in series with the positive and negative poles of the bracket 8 .
[0063] Further, the area ratio of the chips used in 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 and the sixth LED chip 6 is: (0.3-0.5): (0.8-1): (0.8-1): (0.8-1): (0.8-1): (0.8-1). Specifically, the area ratio can be 0.3: 0.8: 0.8: 0.8: 0.8: 0.8 or 0.5: 1: 1: 1: 1: or 0.4: 0.9: 0.9: 0.9: 0.9: 0.9.
[0064] Among them, the spectral energy ratio of the LED structure for plant lighting is: Фe (350-399nm): Фe (400-499nm): Фe (500-599nm): Фe (600-699nm): Фe (700-1000nm) = (0.1%-0.35%): (24%-26%): (29%-31%): (26.5%-27.5%): (16.5%-17.5%). Specifically, the spectral energy ratio can be 0.1%: 24%: 29%: 26.5%: 16.5% or 0.35%: 26%: 31%: 27.5%: 17.5% or 0.22%): 25%): 30%: 27%): 17%.
[0065] Combination Figures 4 to 6 As shown, the spectral energy ratio of the LED structure for plant lighting in this embodiment can be seen as follows
[0066] Table 3:
[0067] Wavelength (nm) 350-399 400-499 500-599 600-699 700-1000 Spectral content 0.001394268 0.143770341 0.175158153 0.157207446 0.098488004 Proportion 0.24％ 24.96％ 30.41％ 27.29％ 17.10％
[0068] Table 3
[0069] In another embodiment of the present invention, a method for preparing an LED structure for plant lighting is provided, which comprises the following steps:
[0070] S100: 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 and the sixth LED chip 6 are arranged on the bracket 8, and are fixed on the bracket 8 by a die bonding machine through insulating glue or silver glue. After the die bonding is completed, they are baked in an oven at a temperature of 150-160°C for 2h±10min, so that 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 and the sixth LED chip 6 are completely fixed on the bracket 8; in this step, after the die bonding is completed, they are baked in an oven at a temperature of 150°C, 155 or 160°C for 1h50min, 2h or 2h10min.
[0071] 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 and the sixth LED chip 6 to the positive and negative electrodes of the bracket 8 by gold wire bonding using a gold wire bonding machine; the connection method in this step is preferably a series connection.
[0072] S300: prepare a 5000K fluorescent glue solution, which is a mixture of silica gel and blue powder, green powder, red powder and infrared fluorescent powder; in this step, the emission wavelength of the blue powder is 490-505nm, the emission wavelength of the green powder is 530-540nm, the emission wavelength of the red powder is 630-640nm, the emission wavelength of the red powder is 655-665nm, and the emission wavelength of the infrared fluorescent powder is 725-735nm.
[0073] S400: Pour the configured 5000K fluorescent glue solution into the glue barrel of the glue dispensing machine. After the glue and bubble removal is completed, the 5000K fluorescent glue solution is dispensed on the bracket 8 according to the color parameter requirements. After the dispensing is completed, it is continuously baked under the conditions of 80±5℃ / 0.5h±10min and 160±5℃ / 4h±10min; the baking conditions in this step can be first baked under the conditions of 80±5℃ / 0.5h±10min, and then baked under the conditions of 160±5℃ / 4h±10min. Among them, the baking under the conditions of 80±5℃ / 0.5h±10min can be baked at 80℃ for 30min, or baked at 85℃ for 40min, or baked at 83℃ for 35min.
[0074] S500: After baking, threshing is carried out, and then the light is split according to the given color parameters using a spectrophotometer to ensure that the light color quality meets the following requirements: S / P ratio>2.15, M / P ratio>0.9, the spectrum is greater than sunlight with the same color temperature, the color quality index CQS>95, the parameters meet the requirements of class A light source system, COI (acid glycoside index)<3.3, and meets the medical light source standards.
[0075] The prepared LED light source has a crop photon utilization rate of >89%, and a German standard crop output utilization rate of >70%; the plant chlorophyll a utilization rate is greater than 9%, 5.7% higher than the same color temperature sunlight, and the plant chlorophyll b utilization rate is greater than 4.2%, 13.9% higher than the same color temperature sunlight; the blue light hazard efficiency K B，V =0.000757646, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V Low, meets the blue light exemption RG0 standard.
[0076] It should be noted that the blue light hazard efficiency K B，V To calculate, that is, the blue light hazard weighted radiance L B The ratio of the corresponding photometric value is calculated as:
[0077]
[0078] Among them, K m =683lm / 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 amount of blue light components in visible radiation. When the brightness of lighting products is the same, K B，V The higher it is, the more likely the light source is to harm the retina.
[0079] Among them, S / P ratio refers to the relative brightness under dark vision and photopic vision conditions, and M / P ratio refers to the relative brightness under non-visual and visual conditions.
[0080] Compared with the prior art, the LED structure for plant lighting of the utility model has the following beneficial effects:
[0081] 1. The LED structure for plant lighting of the utility model has the same S / P ratio and M / P ratio parameters of the packaged finished product as those of sunlight with the same color temperature, which makes people feel comfortable, has clear vision, and has a soft and beautiful visual experience. While being used for plant lighting, it can also be used as an auxiliary lighting source for humans (see Table 1 above);
[0082] 2. The LED structure for plant lighting of the utility model, the SSI of the packaged finished product
[0083] (350-800nm)>93% (see Figure 7 ), has excellent spectral similarity parameters, restores the color of natural light, allows people to experience nature, enjoy the sun bath, and also provides natural light nutrients for plants, increasing output value (see Figure 6 );
[0084] 3. The LED structure for plant lighting of the utility model has excellent light color quality of the packaged finished product, which meets the standard of class A light source, and also meets the high color rendering Ra>98, R1-R15>90, and the TV lighting index TLCI-2012>99, the color quality index CQS>97, TM-30-18, Rg>100, Rf>95, Rf, skin>95, TM-30-18, Rg>100, Rf>95, Rf, skin>95 (see Figure 6 , 8 , 9, 12);
[0085] 4. The LED structure for plant lighting of the utility model has a crop photon utilization rate of >89% and a German standard crop output utilization rate of >70%, which is beneficial to increasing crop yields (see Figure 6 );
[0086] 5. The LED structure for plant lighting of the utility model has a plant chlorophyll a utilization rate of more than 9%, which is 5.7% higher than the sunlight with the same color temperature, and a plant chlorophyll b utilization rate of more than 4.2%, which is 13.9% higher than the sunlight with the same color temperature, which is beneficial to improve the production capacity and yield of plants (see Figures 10-11 );
[0087] 6. The LED structure for plant lighting of the utility model has a blue light hazard efficiency K B，V =0.000757646, which is the same as the K of sunlight with the same color temperature B，V (Blue light hazard efficiency) is low, meeting the blue light exemption RG0 standard (see Fig.14 );
[0088] 7. Designed in accordance with solar spectroscopy, it can be applied to simulation recognition, healthy lighting and other fields.
[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An LED structure for plant lighting, characterized in that: The device comprises a bracket and a plurality of LED chips, wherein the bracket comprises a conductive bottom plate and an insulating plastic outer frame arranged on the outer periphery of the conductive bottom plate, wherein the insulating plastic outer frame and the conductive bottom plate form a bowl cup, wherein a waterproof groove is arranged in the middle of the conductive bottom plate to separate the bowl cups into a symmetrical structure, wherein an isolation belt is arranged in the waterproof groove, wherein a plurality of the LED chips are arranged on the conductive bottom plate, and wherein a fluorescent glue coated on each of the LED chips is arranged in the bowl cup; The multiple LED chips include a first LED chip with a peak wavelength of 725-735nm, a second LED chip with a peak wavelength of 405-415nm, a third LED chip with a main wavelength of 440-445nm, a fourth LED chip with a main wavelength of 480-485nm, a fifth LED chip with a main wavelength of 450-455nm and a sixth LED chip with a main wavelength of 462-468nm.
2. The LED structure for plant lighting according to claim 1, characterized in that: The isolation belt is in an I-shape, the upper edge of the I-shaped isolation belt abuts against the upper surface of the conductive bottom plate, and the lower edge is flush with the lower surface of the conductive bottom plate.
3. The LED structure for plant lighting according to claim 1, characterized in that: The conductive base plate comprises a copper material matrix and a nickel layer and a silver layer arranged on the copper material matrix.
4. The LED structure for plant lighting according to claim 3, characterized in that: The thickness of the copper material matrix is 0.25 mm, the thickness of the nickel layer is 0.025 μm, and the thickness of the silver layer is 0.25 μm.
5. The LED structure for plant lighting according to claim 1, characterized in that: The number of the first LED chip is one, the number of the second LED chip is one, the number of the third LED chip is two, the number of the fourth LED chip is one, the number of the fifth LED chip is two, and the number of the sixth LED chip is two; The first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip and the sixth LED chip are connected in series with the positive and negative electrodes of the bracket.
6. The LED structure for plant lighting according to claim 5, characterized in that: The symmetrical bowl is divided into a first side and a second side, and the first side of the bowl is provided with the first LED chip, the second LED chip, the third LED chip, the fifth LED chip and the sixth LED chip, and the second side of the bowl is provided with the fourth LED chip, the third LED chip, the fifth LED chip and the sixth LED chip.
7. The LED structure for plant lighting according to any one of claims 1 to 6, characterized in that: The area ratio of the chips used by the first LED chip, the second LED chip, the third LED chip, the fourth LED chip, the fifth LED chip and the sixth LED chip is: (0.3-0.5): (0.8-1): (0.8-1): (0.8-1): (0.8-1): (0.8-1).