Design method of multi-primary-color powder-free lighting product

Abstract

The invention relates to a design method of a multi-primary-color powder-free lighting product. The design method mainly comprises the following steps: S1, selecting a light source; s2, designing a light source plate; s3, designing a multi-channel power supply; s4, inputting a formula and a temperature compensation algorithm; and S5, online adaptive calibration is carried out. The method disclosed by the invention can be used for realizing research and development and design of various lamps, can guide design and research and development of powder-free lighting products in various aspects of light source selection, light source plate design, power supply design, light formula calculation, final light color consistency calibration and the like, and can be applied to healthy lighting lamp products; the lamp designed and produced by the invention can realize dynamic illumination according to different time periods by adjusting spectrums, illuminance and brightness and the like, and illumination is realized as required.

Description

Technical Field

[0001] The invention relates to the technical field of lighting fixture product design, and in particular to a design method for a multi-primary color powder-free lighting product. Background Art

[0002] Multi-primary color pure LED without phosphor can realize the lighting of various lamps. By accurately controlling and adjusting the current of each chip through the driving power supply, healthy lighting lamps with controllable light effect, color temperature and adjustable display index can be made. It can even simulate the lighting data of seasons and sunshine for stepless dimming, realizing truly intelligent and healthy lighting.

[0003] Therefore, multi-primary color powder-free chips are mostly used in healthy lighting products, which need to adjust the spectrum and illumination brightness according to different time periods to achieve dynamic lighting and on-demand lighting. A complete set of product design method frameworks is needed during product design. This design method framework can be used to implement the research and development of various lamps, including light source selection, light source board design, power supply design, light formula calculation, and final light color consistency calibration, etc., which can guide the design and development of powder-free lighting products.

[0004] Based on the above background, the present invention proposes a design method for a multi-primary color powder-free lighting product. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, adapt to actual needs, and provide a design method for a multi-primary color powder-free lighting product to meet the needs described in the background technology.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is: A design method for a multi-primary color powder-free lighting product is designed, characterized by comprising the following steps: S1. Light source selection; S2, light source board design; S3, multi-channel power supply design; S4, input formula and temperature compensation algorithm; S5. Online adaptive calibration.

[0007] Step S2: Light source board design includes the following steps: S21, determining the number of lamp beads, including the following steps: S211, calculating the power consumption of the light source panel according to the wattage of the lamp and the conversion efficiency of the power supply; S212, confirming the number of basic units to be used according to the wattage of the basic units in the light source; S213, calculating the number of lamp beads required for each channel and the number of lamp beads required for the entire lamp; S214, determine the number of lamp beads in a single string of each channel and the number of lamp beads in each channel according to the output voltage of the power supply, determine the number of basic units required for the lamp series and parallel connection, and draw the light source board.

[0008] Step S22 determines the light source color separation layout, including the following steps: S221, determining the position and direction of the internal lamp beads in the minimum light-emitting unit according to the minimum light-emitting unit of the basic unit formed by the combination of various colored lights; S222, copying multiple minimum light-emitting units and evenly arranging them in the entire design space of the light source board; S223, the minimum light-emitting units in adjacent rows and columns are arranged in a 180° rotation.

[0009] In step S222, copying a plurality of minimum light-emitting units and evenly arranging them in the entire design space of the light source board includes the following steps: S2221, determine the total number N of units that need to be arranged in the space; S2222, setting the initial outline of the minimum light-emitting unit; S2223, setting the horizontal and vertical spacing of the minimum light-emitting unit to a square, and setting the side length value; S2224. Adjust the arrangement angle value and avoid the installation holes of the light board; S2225. Determine whether the minimum number of arranged light-emitting units N' satisfies the number N determined in step S2221. If N'>N, repeat step S2223 and increase the side length value; if N'<N, repeat step S2223 and decrease the side length value; if N'=N, output the drawing.

[0010] Step S3 multi-channel power supply design includes the following steps: S31, making the voltage of each string of light sources equal; S32, adjusting the opening time of each string of light sources through software and performing compensation; S33, adjusting the hardware and ensuring the timing of turning on and off each string of light sources is synchronized.

[0011] Step S4: formula and temperature compensation algorithm input includes the following steps: S41, collecting spectral data under different temperature and current conditions, and importing the collected data into the established data model calculation program according to the set name format; S42, constructing a mixed light spectrum model based on the spectrum data of each monochromatic light under different temperature and current conditions; S43. Calculate the color temperature, color rendering index, and color tolerance parameters under different current and temperature combinations based on the mixed light spectrum model, and select the light formula of multi-primary color LED powder-free lamps that meet the required light color data at different ambient temperatures by limiting the color temperature, color rendering index, and color tolerance parameters; S44. The light formula that meets the lamp parameter requirements is stored in the main control chip. The main control chip dynamically adjusts the driving current of each light source string according to the received temperature information, so that the light color of the lamp is stable in different ambient temperatures.

[0012] The beneficial effects of the present invention are: The method of the present invention can be used to realize the research and development design of various lamps, including light source selection, light source board design, power supply design, light formula calculation, and final light color consistency calibration, etc. It can guide the design and development of powder-free lighting products and can be used in healthy lighting products. The lamps designed and produced by the present invention can adjust the spectrum and illumination brightness according to different time periods to realize dynamic lighting and on-demand lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the minimum light-emitting unit structure; Figure 2 is a flow chart of step S222; Figure 3 is a circuit diagram in step S33 of the embodiment; Figure 4 Schematic diagram of calibration using vector point multiplication.

[0014] Figure 5 A schematic diagram of calibration based on color matching principles combined with geometric methods.

[0015] Figure 6 It is a schematic diagram of the effect achieved by the ceiling lamp product 1 designed by the method of the present invention.

[0016] Figure 7 It is a schematic diagram of the effect achieved by the ceiling lamp product 2 designed by the method of the present invention.

[0017] Figure 8 It is a schematic diagram of the effect achieved by the ceiling lamp product 3 designed by the method of the present invention.

[0018] Fig. 9 It is a schematic diagram of the effect achieved by the ceiling lamp product 4 designed by the method of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Example 1: A design method for a multi-primary color powder-free lighting product, see Figure 1 , Figure 2 ; The research and development goal of the design method of multi-primary color powder-free lighting products of the present invention is to customize a multi-primary color powder-free light formula that can burn relevant algorithms based on the existing lighting fixture product structure kit, or on the basis of developing a new industrial appearance structure design kit, and finally achieve the performance consistency quality requirements of lamp production through the calibration equipment of the online closed-loop adaptive feedback algorithm. The specific steps include the following process: S1. Light source selection: Light source selection is a preview of light formula selection. Light source selection is a repetitive optimization process. Different light formulas are updated as the best options during the development of new products. Currently, discrete 2835 packaged lamp beads are used as reference light sources. Different spectra are combined into the smallest independent unit and continuously copied and applied to different powers or different lamp kits. Therefore, how to select the different spectral bands in this smallest independent unit to achieve the multi-primary color powder-free light formula required by the final lamp is a key requirement for light source selection.

[0020] This embodiment selects 5-way discrete 2835 packaged lamp beads, which can be expanded to 3030 package in the future. Based on previous experience, the light color indicators of the multi-primary color powder-free lighting formula are: color temperature range 2700-5000K, meeting the requirements of light efficiency>120lm / W, R9>90 and Ra>90, yellow-green proportion>25%, of which 4500K is 26.92-28.37%.

[0021] Finally, five channels with ten primary colors (RGYCB) were selected. Each channel is connected in 12 series and 12 parallel mode. Each channel has 36*4=144 lamp beads, and the five channels have a total of 720 lamp beads. The 450nm and 470nm lamp beads used in the early design were not pure enough. The use of 460nm can achieve a pure blue effect. The ratio of lamp beads with each main wavelength in the entire light source selection is: 460:480:517:522:555:562:575:590:620:627=4:4:2:2:1:2:1:1:2:1. Among them, there is one channel of blue light 460nm; one channel of cyan light 480nm; one channel of green light 517nm and 522nm, among which the ratio of green light 517nm and 522nm is 2:2; one channel of yellow light 555nm, yellow light 562nm and yellow light 575nm, among which the ratio of yellow light 555nm, yellow light 562nm and yellow light 575nm is 1:2:1; one channel of red light 590nm, red light 620nm and red light 627nm, among which the ratio of red light 590nm, red light 620nm and red light 627nm is 1:2:1, as shown in the following table:

[0022] S2. Light source board design: The light source board design is based on the light source selection, lamp power and the current and voltage of each channel of the next digital power supply output, and the design schematic diagram. Then, according to the space in the required kit or the existing aluminum substrate size diagram, the light source board is designed. In different product applications, a more optimized design solution to solve the color separation problem is optimized, which includes the following two steps: S21, determine the number of lamp beads; S22. Determine the color separation layout of the light source.

[0023] Specifically, step S21 of determining the number of lamp beads includes the following steps: S211, calculating the power consumption of the light source panel according to the wattage of the lamp and the conversion efficiency of the power supply; S212, according to the wattage of the basic unit in the light source, determine how many groups of basic units are needed to meet the electrical power of the light source panel; S213, calculating the number of lamp beads required for each channel and the number of lamp beads required for the entire lamp; S214, determine the number of lamp beads in a single string of each channel and the number of lamp beads in each channel according to the output voltage of the power supply, determine the number of basic units required for the lamp series and parallel connection, and draw the light source board.

[0024] Step S21 determines the number of lamp beads, taking the number of ceiling light source panels as an example: (1) The wattage of the entire lamp is 18 watts, and the power conversion efficiency is 80%. The power consumed by the light source panel is 18*0.8=14.4W.

[0025] (2) 20 lamp beads (0.4W) form a basic unit, and 14.4 / 0.4=36 sets of basic units are required.

[0026] (3) Using five channels, each channel requires 36*4=144 lamp beads, and the five channels have a total of 720 lamp beads.

[0027] (4) Because the power supply ACDC outputs 36V and the maximum blue light voltage is about 3V, 12 strings means 12*12=144 pieces, so each channel is connected in 12 strings and 12 parallels.

[0028] Specifically, step S22 of determining the light source color separation layout includes the following steps: S221, according to the combination of each color light to form the minimum light-emitting unit of the basic unit, determine the position and direction of the internal lamp beads in the minimum light-emitting unit, so that it can be used as an independent package to achieve copy call, which is convenient for the layout of the light source board, such as Figure 1 Shown is a structural diagram of the minimum light-emitting unit; S222, copying multiple minimum light-emitting units and evenly arranging them in the entire design space of the light source board; In this step, in order to ensure that the minimum light-emitting unit is evenly arranged in the design space, we set the outline of the minimum light-emitting unit to a square. Using the fill array command in SolidWorks, the number of units that can be arranged in the entire design space is close to 1.1 times the total number of design units. This provides adjustment space for subsequent layout routing, hole positions, and edge structural interference, so that the overall layout is in the best position in the space. The specific process is as follows (see Figure 2 shown): S2221, determine the total number N of units that need to be arranged in the space; S2222, setting the initial outline of the minimum light-emitting unit; S2223, setting the horizontal and vertical spacing of the minimum light-emitting unit to a square, and setting the side length value; S2224. Adjust the arrangement angle value and avoid the installation holes of the light board; S2225. Determine whether the minimum number of arranged light-emitting units N' satisfies the number N determined in step S2221. If N'>N, repeat step S2223 and increase the side length value; if N'<N, repeat step S2223 and decrease the side length value; if N'=N, output the drawing.

[0029] S223. To avoid one color appearing in one area or line in the lamp, the minimum light-emitting units in adjacent rows and columns are arranged in a 180° rotation, taking the number of light source panels of the ceiling lamp as an example: The five channels of blue, cyan, green, yellow and red are arranged in a quadrilateral in a ratio of 1:1:1:1:1 to form a replicable minimum light-emitting unit. The minimum light-emitting units rotate with each other. In the entire light board, the same primary color light is dispersed and evenly arranged as much as possible, so that the same primary color is not concentrated in a certain direction, eliminating the color separation phenomenon.

[0030] S3, multi-channel power supply design; In this step, the temperature compensation algorithm and light recipe optimization algorithm adapted to the multi-primary color powder-free lighting, the online adaptive calibration device in production needs to program the control chip on the hardware power supply, the formal product requires regular parts input and finished product delivery process control, formal testing and certification, production process personnel training, fixture curing, environmental control, label identification and packaging and other quality assurance, multi-channel power supply is needed to match the lighting kit and light source to realize the powder-free product market.

[0031] Considering the power quality control and mass production, as well as the ODM power design, the performance parameter requirements need to meet the following key points: each channel output current, to meet the current requirements of different color temperatures for that channel, for example, the blue light current is relatively large at high color temperature, while the red light current is relatively large at low color temperature. Finally, for 18W, a 36V output voltage is used, the maximum current of the two channels is 340mA, and the other 100mA; for the 42W power supply output 65V, the maximum current of the two channels is 450mA, and the other 130mA; and for the 60W power supply output voltage 75V, the maximum current of the two channels is 550mA, and the other is 160mA; this not only meets the voltage requirements of a small number of lamp beads connected in series at low power, but also can achieve a slightly higher output voltage for higher power power supplies, achieving higher power conversion efficiency.

[0032] In addition, during the production of the ceiling lamp, the start-up voltage of each color LED is different. When turning on and off the machine and changing the color, different primary colors may light up one after another. Therefore, this step specifically includes the following steps: S31. When designing the light source, try to make the voltage of each string of light sources equal. Consider adding more strings to low-voltage lamp beads and fewer strings to high-voltage lamp beads to ensure that the voltages are close. The voltage design should have 20% redundancy. For example, the 36V voltage of a ceiling lamp is too small. In the cyan light mode, the voltage has reached the maximum voltage, which has an adverse effect on regulating the current.

[0033] S32, adjusting the opening time of each string of light sources through software and making compensation; calculating the lighting time of different primary colors when turning on and off the machine, and designing different delays for different primary colors in the software, thereby solving the problem that the primary colors light up at different times.

[0034] S33, make adjustments in hardware and ensure the synchronization of the opening and closing time of each string of light sources; by isolating the voltages of different primary colors, prevent the output voltage from being clamped when the lamp beads of low-voltage primary colors are lit. By adding diodes to isolate each path and connecting capacitors in parallel between the output 36V and GND, the problem of low-voltage lamp beads going out when turning off the lights is solved. The specific circuit is as follows Figure 3 shown.

[0035] S4. Formula and temperature compensation algorithm input: In this step, the formula and temperature compensation algorithm input will control the hardware power burning program, realize the algorithm implementation and the launch of multi-primary color powder-free lighting products, including the following steps: S41, collecting spectral data under different temperature and current conditions, and importing the collected data into the established data model calculation program according to the set name format; 2. Construct a mixed light spectrum model of multi-primary color LED powder-free lamps based on the spectrum data of each monochromatic light under different temperature and current conditions; 3. Based on the model, calculate the color temperature, CRI, color tolerance and other parameters under different current and temperature combinations, and then select the light formula of multi-primary color LED powder-free lamps that meet the required light color data under different ambient temperatures by limiting these light color parameters; 4. The light formula that meets the lamp parameter requirements is screened out and stored in the main control chip. The main control module dynamically adjusts the driving current of each LED according to the received temperature information, so that the light color of the multi-primary color LED powder-free lamp is stable in different ambient temperatures.

[0036] When implementing the above steps, please note that: 1. When performing variable temperature test, the temperature is considered stable half an hour after the temperature is set, and spectrum collection begins. Considering that the process of adjusting the duty cycle of each channel will cause the temperature of the light source substrate to rise, the temperature of the light source substrate at this time is recorded when the duty cycle is set to start spectrum collection. When setting the next temperature for measurement, it must be ensured that it is greater than the maximum temperature reached by the light source substrate at the last set temperature.

[0037] 2. There are errors in the measurements of the two illuminance meters, so try to use a round-head illuminance meter for testing.

[0038] 3. The lamp should be placed as far away from the probe as possible to make the light reaching the probe uniform and reduce the difference caused by different measurement positions. However, at high temperatures, the probe will have noise when collecting the low duty cycle spectrum of the lamp.

[0039] S5, online adaptive calibration: Due to inconsistent chip bins, the influence of power supply output current accuracy, and differences between different lamps in the production process, the key parameter indicators of each lamp may be inconsistent when multi-primary color powder-free lighting products are finally produced and shipped, and may even not meet the performance parameters claimed by the product. When leaving the factory, a calibration device is required to achieve the performance parameters and consistency requirements by lighting the lamp, collecting and analyzing the spectrum sensor, calibrating the difference with the target value, and fine-tuning the hardware power and light formula, etc., to meet the shipment requirements.

[0040] The power light formula of each lamp in this implementation is the same, which is the result calculated by the initial data model algorithm and preset into the power MCU. However, in fact, each light source board, lamp bead Bin, and power supply output current accuracy, etc. will cause the light color of each lamp to be different under the same light formula, and even the declared specifications of the entire lamp may not be met. It is necessary to perform online adaptive calibration and light formula fine-tuning for each lamp.

[0041] Taking the current mass production of classroom lights as an example, the original lighting script adjustment process was entirely based on experience, and the structural regulations were unclear. And whenever a new problem arises, the lighting script needs to be frequently modified. In actual operation, the equipment often has color temperature and SDCM indicators that meet expectations, but Ra and R9 are always unqualified, and after another round of program adjustments, the indicators that originally met the standards are unqualified. All these have caused the production line efficiency to be low, or the calibration process of the lamp assembly process has become a bottleneck, and many lamps are waiting to be processed. In order to solve the above problems, the following processing methods are often used: 1) Vector point multiplication can be used to quickly find the color point closest to the target point corresponding to the coordinates of each color point, but there are some problems: assuming that the LED parameters change approximately linearly with the current when the current adjustment range is not large, this is problematic, especially for the nonlinear situation of spectral energy and current under low current, and the final result does not take into account the current ratio that meets the CRI index (see Figure 4 ).

[0042] 2) The old algorithm is based on the color adjustment principle and combined with geometric methods to adjust the color coordinates as the target. However, because only the color coordinates are considered, other indicators are not adjusted properly. The algorithm can no longer determine that the color coordinates meet the requirements, and then continue to adjust the current ratio to meet other indicators such as the display index. A new algorithm is proposed: a triangle is formed by the three colors RGB, and its mixed color is the auxiliary color C. The target color T can be regarded as a composite of imaginary C and Y, and the auxiliary color C must be located at the red dotted line. Sample the auxiliary color C, calculate the RGBY color ratio required to synthesize T based on the sampled value, and then calculate the corresponding current ratio, and judge whether it meets the requirements (see Figure 5 ).

[0043] The new algorithm was deployed on the device and tested. The results show that although the improved algorithm has improved the effect compared with the old algorithm, it is still far from the target. In order to solve the problem of difference between the calculated spectrum and the measured spectrum, the algorithm was improved to interpolate the nonlinear change of the LED monochromatic spectrum with the current intensity and compensate for the drift problem.

[0044] 3) Test the step current spectrum data, and pay attention to the changes in the spectrum peak intensity and peak wavelength with current. For the change in peak wavelength, try to fit the data with quadratic function and logarithmic function. Both fit very well and are above 0.95, and the logarithmic function fits better. For the change in wavelength, try to fit with quadratic function and logarithmic function. The quadratic function fits poorly, but the logarithmic function fits very well, all above 0.95. The algorithm has significant compensation effect under high current, but not so good under low current. Finally, it was decided to use logarithmic function to fit the changes in spectrum peak intensity and peak wavelength.

[0045] By analyzing the data of all lamps and observing the data change trend, it was found that the changes between individual lamps were quite different, and the results of a single fit could not be applied to other lamps. To address this problem, the spectrum of each lamp under three current values ​​was tested during debugging, and the fitting function expression was calculated based on the measured spectrum data for subsequent compensation. The experimental results show that this method is effective to a large extent.

[0046] The spectrum compensation part was added to the current quadrilateral color synthesis algorithm and tested on the machine, but the effect was worse than that without compensation. In some color temperature ranges, the current ratio could not be found. After analysis, it was found that the assumption that "the color coordinates of the four primary colors remain basically unchanged during the adjustment process" was not valid.

[0047] In order to solve the problem of the failure of the quadrilateral color synthesis algorithm, an adaptive light distribution algorithm based on the multi-objective optimization evolutionary algorithm (MOEA) is proposed. The four current channel values ​​are used as decision parameters, and various lighting indicators are used as optimization parameters. The spectral compensation algorithm is used to search for the current ratio that meets the requirements in the parameter space. Theoretical experiments show that this method is effective and has better results than the quadrilateral synthesis algorithm. The results of the computer test show that the algorithm based on MOEA is much better than the algorithm based on the quadrilateral color synthesis algorithm, and the speed is not significantly slowed down. However, it is still far from the actual indicator requirements. The difference in CRI is at the single-digit level, the color coordinates are at the order of magnitude, and the SDCM gap is about 2-5.

[0048] 4) Based on spectral spline interpolation and multi-objective genetic optimization algorithms, after continuous attempts and verifications, field experiments using the original spectral data lookup table method found that the difference between the theoretical algorithm calculation and the measured data mainly comes from the fitting accuracy of the spectral data under different currents, and the multi-objective genetic optimization has basically no effect. In this way, the spectral data under different currents can be directly interpolated using splines with higher accuracy. By continuously trying different positions and different numbers of current ratios for interpolation, the difference in accuracy is used to determine the minimum number of pre-tested monochromatic spectra to reduce the running time. In addition, it is found that the genetic algorithm results have a high degree of convergence, and the differences with the measured data are relatively regular, which is verified by the coordinate compensation method using the final output results.

[0049] In summary, according to the above design method and process, the effect of the non-powdering design of the ceiling lamp product is as follows (see Figures 6 to 9 ), through each view it can be seen that the technical parameters of the relevant lamps meet the initial requirements.

[0050] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A design method for a multi-primary color powder-free lighting product, characterized in that: The steps include: S1. Light source selection; S2, light source board design; S3, multi-channel power supply design; S4, input formula and temperature compensation algorithm; S5. Online adaptive calibration.

2. The design method of a multi-primary color powder-free lighting product according to claim 1, characterized in that: Step S2: Light source board design includes the following steps: S21, determine the number of lamp beads; S22. Determine the color separation layout of the light source.

3. The design method of a multi-primary color powder-free lighting product as claimed in claim 2, characterized in that: Step S21 determines the number of lamp beads, including the following steps: S211, calculating the power consumption of the light source panel according to the wattage of the lamp and the conversion efficiency of the power supply; S212, confirming the number of basic units to be used according to the wattage of the basic units in the light source; S213, calculating the number of lamp beads required for each channel and the number of lamp beads required for the entire lamp; S214, determine the number of lamp beads in a single string of each channel and the number of lamp beads in each channel according to the output voltage of the power supply, determine the number of basic units required for the lamp series and parallel connection, and draw the light source board.

4. The design method of a multi-primary color powder-free lighting product according to claim 2, characterized in that: Step S22 determines the light source color separation layout, including the following steps: S221, determining the position and direction of the internal lamp beads in the minimum light-emitting unit according to the minimum light-emitting unit of the basic unit formed by the combination of various colored lights; S222, copying multiple minimum light-emitting units and evenly arranging them in the entire design space of the light source board; S223, the minimum light-emitting units in adjacent rows and columns are arranged in a 180° rotation.

5. The design method of a multi-primary color powder-free lighting product according to claim 4, characterized in that: In step S222, copying a plurality of minimum light-emitting units and evenly arranging them in the entire design space of the light source board includes the following steps: S2221, determine the total number N of units that need to be arranged in the space; S2222, setting the initial outline of the minimum light-emitting unit; S2223, setting the horizontal and vertical spacing of the minimum light-emitting unit to a square, and setting the side length value; S2224. Adjust the arrangement angle value and avoid the installation holes of the light board; S2225. Determine whether the minimum number of arranged light-emitting units N' satisfies the number N determined in step S2221. If N'>N, repeat step S2223 and increase the side length value; if N'<N, repeat step S2223 and decrease the side length value; if N'=N, output the drawing.

6. The design method of a multi-primary color powder-free lighting product according to claim 1, characterized in that: Step S3 multi-channel power supply design includes the following steps: S31, making the voltage of each string of light sources equal; S32, adjusting the opening time of each string of light sources through software and performing compensation; S33, adjusting the hardware and ensuring the timing of turning on and off each string of light sources is synchronized.

7. The design method of a multi-primary color powder-free lighting product according to claim 1, characterized in that: Step S4: formula and temperature compensation algorithm input includes the following steps: S41, collecting spectral data under different temperature and current conditions, and importing the collected data into the established data model calculation program according to the set name format; S42, constructing a mixed light spectrum model based on the spectrum data of each monochromatic light under different temperature and current conditions; S43. Calculate the color temperature, color rendering index, and color tolerance parameters under different current and temperature combinations based on the mixed light spectrum model, and select the light formula of multi-primary color LED powder-free lamps that meet the required light color data at different ambient temperatures by limiting the color temperature, color rendering index, and color tolerance parameters; S44. The light formula that meets the lamp parameter requirements is stored in the main control chip. The main control chip dynamically adjusts the driving current of each light source string according to the received temperature information, so that the light color of the lamp is stable in different ambient temperatures.

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