A human factor lighting source with full solar spectrum and its design method

Abstract

The present application discloses a human-caused lighting source with a full solar spectrum and a design method thereof, which relates to the technical field of human-caused lighting, including a cold white light source, a warm white light source and a light distribution light source, wherein the color temperature of the cold white light source is greater than or equal to 5000K, the color temperature of the warm white light source is less than or equal to 4000K, and the color coordinates of the light distribution light source, the color coordinates of the warm white light source, and the color coordinates of the cold white light source are connected to form a triangle covering the curve segment where the full solar spectrum is located on the Planckian locus. The present application has the effect of improving the full-spectrum dimming capability of the lighting source.

Description

Technical Field

[0001] The present application relates to the technical field of human-centered lighting, and in particular to a human-centered lighting source with a full solar spectrum and a design method thereof. Background Art

[0002] As the spectrum of LED light sources becomes more and more adjustable, people's requirements for lighting are not only limited to traditional considerations such as light efficiency, color temperature and color rendering index. People hope to have a lighting method that is more in line with human needs.

[0003] At present, human-centered lighting has been developed to meet people's personalized lighting needs in special environments. The effects of different color temperatures and different spectra on people have been regulated and strengthened in lighting needs. In particular, the effects of the full spectrum simulating the full solar spectrum on the human body need to be optimized, and it is necessary to modulate the luminous spectrum according to time and working environment.

[0004] However, in the current design of full-spectrum light sources, high-efficiency blue light LEDs are generally used to excite long-wavelength phosphors; in dimming design, cold white and warm white dual-color dimming solutions are generally used, and the color coordinates of the solar spectrum are near the Planckian locus. Traditional dimming solutions cannot achieve dimming of the entire solar spectrum, so the full-spectrum dimming capability of traditional dimming solutions is insufficient. Summary of the invention

[0005] In order to improve the problem of insufficient full-spectrum dimming capability of traditional dimming solutions, the present application provides a full solar spectrum human-factor lighting source and a design method thereof.

[0006] In the first aspect, the present application provides a human-caused lighting source with a full solar spectrum, using the following technical solutions:

[0007] A full solar spectrum human factor lighting source includes:

[0008] Cold white light source, color temperature greater than or equal to 5000K;

[0009] Warm white light source, color temperature less than or equal to 4000K;

[0010] The light distribution light source, the triangle formed by the color coordinates, the color coordinates of the warm white light source, and the color coordinates of the cold white light source covers the curve segment where the full solar spectrum is located on the Planckian locus.

[0011] By adopting the above technical solution, the traditional dimming solution realizes dimming through two-color light. If only two-color light is used for dimming, the color coordinates of the mixed light are located on the line connecting the color coordinates of the two colors. However, since the Planckian locus is a curve, it is difficult to achieve full coverage of the Planckian locus segment by dimming only through two-color light. Therefore, this application adopts a three-color dimming lighting source. According to the color mixing principle of color coordinates, by setting the color coordinate points of three light sources in the color coordinates, the light color corresponding to any color coordinate in the triangle surrounded by the three color coordinate points can be obtained through weighted calculation of the three light sources, thereby achieving full coverage of the corresponding color coordinate points of the full solar spectrum curve segment on the Planckian locus.

[0012] Optionally, the color coordinates of the cold white light source are located on the Planckian locus, the color coordinates of the warm white light source are located below the Planckian locus, and the color coordinates of the light distribution light source are located above the Planckian locus.

[0013] By adopting the above technical solution, when the same chip is constructed, since the luminous flux of the cold white light source is larger than that of the warm white light source, the brightness of the light source under different color temperatures is different, which will make the user's experience poor; if the color coordinates of the cold white light source that is lit alone are located on the Planckian locus, in order to make the luminous flux of the lighting light source of the present application at the position of the Planckian locus corresponding to the color temperature of the cold white light source be the same as the luminous flux at the position of the Planckian locus corresponding to the color temperature of the warm white light source, the color coordinates of the warm white light source that is lit alone should be located below the Planckian curve, thereby increasing the luminous flux at the position on the Planckian locus corresponding to the color temperature of the warm white light source through the color mixing of the warm white light source and the light distribution light source. In addition, only by setting the light distribution light source above the Planckian locus can the range surrounded by the color coordinates of the three light sources cover the corresponding curve segment of the Planckian locus.

[0014] Optionally, the color coordinate point of the cold white light source is set to (x c ,y c ), the color coordinate point of the warm white light source is (x w ,y w ), the color coordinate point of the light distribution light source is (x m ,y m ), the cold white light source is located on the Planckian locus, and the color coordinates of the warm white light source satisfy y w ≤-3x w 2 +2.87x w -0.275, the color coordinates of the light source satisfy y m ≥(2.87-6x c )x m +3x c 2 -0.275.

[0015] By adopting the above technical solution and using the light mixing equation group and the corresponding color coordinates for calculation, it can be obtained that when the color coordinates of the cold white light source, the warm white light source and the light distribution light source satisfy the above formula, the triangular area enclosed by the color coordinates of the cold white light source, the warm white light source and the light distribution light source can cover the corresponding Planck curve segment.

[0016] Optionally, the color coordinates of the cold white light source are located at a color temperature of 6500K in the Planckian locus, and a line connecting the color coordinates of the warm white light source and the color coordinates of the light distribution light source passes through a color temperature of 2700K in the Planckian locus.

[0017] By adopting the above technical solution, 2700K is the traditional warm color temperature, and 6000K is the highest color temperature of sunlight during the day. If the dimming range of the lighting source of the present application covers the interval range of the Planckian trajectory segment from the color temperature of 2700K to the color temperature of 6500K, the lighting source of the present application can simulate the various light rays that change in sunlight within a day, thereby meeting the lighting needs of the full solar spectrum; setting the cold white light source at the Planckian trajectory color temperature of 6500K makes the lighting source of the present application reach the Planckian trajectory. When the light source is at a color temperature of 6500K on the Planckian locus, only the cold white light source needs to be lit separately; since the luminous flux of the warm white light source is smaller than that of the cold white light source, the color coordinates of the warm white light source and the color coordinates of the light distribution light source are designed to pass through the color temperature of 2700K in the Planckian locus, so that when the lighting light source of the present application reaches the color temperature of 2700K in the Planckian locus, the luminous flux can be increased by mixing the warm white light source and the light distribution light source, so that the luminous flux at the color temperature of 2700K is the same as the luminous flux at the color temperature of 6500K.

[0018] Optionally, the color coordinates of the light distribution light source are located above the tangent line at the color temperature of 6500K in the Planckian locus.

[0019] By adopting the above technical solution, when the color coordinates of the cold white light source are at a color temperature of 6500K, in order to make the range enclosed by the color coordinates of the light distribution light source, the cold white light source and the warm white light source cover the range of 2700K-6500K of the Planckian locus, the light distribution light source needs to be located above the tangent of the Planckian locus at a color temperature of 6500K.

[0020] Optionally, the color coordinate point of the warm white light source is set to (x w0 ,y w0 ), the color coordinate point of the light distribution light source is (x m0 ,y m0 ), the color coordinates of the warm white light source satisfy y w0 ≤-3x w0 2 +2.87y w0 -0.275-0.002, the color coordinates of the light source satisfy y m0≥0.98x m0 +0.018.

[0021] By adopting the above technical solution, when the chip is of the same composition, the luminous flux of the cold white light source with a color temperature of 6500K is about 10% larger than that of the light source with a color temperature of 2700K. In order to ensure that the luminous flux of the warm white light source and the light distribution light source after mixing is not less than the luminous flux of the cold white light source, the luminous flux ratio of the warm white light source and the light distribution light source cannot be greater than 9:1. Based on this, the distance of the warm white light source from the Planckian locus is calculated, and y is obtained. m The value should be reduced by 0.002.

[0022] Optionally, the spectrum wavelength range of the light distribution light source includes 480nm-650nm, and the short-wave half-height position of the spectrum of the light distribution light source is 470nm-490nm, and the long-wave half-height position is 640nm-660nm.

[0023] By adopting the above technical solution, after superimposing the spectra of the warm white light source and the cold white light source in a certain ratio, it is found that the spectrum after the superposition of the warm white light source and the cold white light source is missing in the wavelength range of 480nm-650nm compared to the daylight spectrum. Therefore, the missing segment needs to be supplemented by a light distribution light source, so that the lighting light source of the present application can better simulate the daylight light source.

[0024] Optionally, the light distribution light source further includes a supplementary chip, and the wavelength of the light source of the supplementary chip is 480nm.

[0025] By adopting the above technical solution, after superimposing the spectra of the warm white light source and the cold white light source in a certain ratio, it is found that the spectrum after the superposition of the warm white light source and the cold white light source is missing in the wavelength range of 480nm-650nm compared with the sunlight spectrum, and the missing segment covers the 480nm human blue band and the green light band that is harmless to the human body. The green light band is supplemented by the light distribution light source, and the 480nm human blue band is supplemented by the supplementary chip.

[0026] Optionally, the warm white light source includes a red light chip with a wavelength of 690-730nm.

[0027] By adopting the above technical solution, the full-spectrum products currently on the market are missing in the long-wavelength red light range compared to the true full solar spectrum. When the wavelength is around 700nm, the efficiency of using red phosphor to increase red light is low. In order to achieve the full-spectrum effect, red light chips can be added to the warm white light source to make up for the lack of long-wavelength red light range.

[0028] On the other hand, the present application provides a method for designing a human-factor lighting source with a full solar spectrum, comprising the following design steps:

[0029] S1: Determine the color coordinates of a cold white light source on the Planckian locus and use them as the first endpoint of the full solar spectrum curve segment, wherein the color temperature of the cold white light source is greater than or equal to 5000K;

[0030] S2: Draw a tangent line of the Planckian locus at the color coordinates of the cold white light source;

[0031] S3: determining the color coordinates of the warm white light source below the second endpoint of the full solar spectrum curve segment, wherein the second endpoint of the full solar spectrum curve segment is located on the Planckian locus, and the color temperature of the warm white light source is less than or equal to 4000K;

[0032] S4: Connect the color coordinates of the warm white light source and the second endpoint and extend the line to above the tangent line;

[0033] S5: Determine the color coordinates of the light distribution light source in the portion of the connecting line located above the tangent line.

[0034] According to the above design method, the color coordinates of the warm white light source, the cold white light source and the light distribution light source can be determined, so as to realize the three-color mixing of the warm white light source, the cold white light source and the light distribution light source to cover the curve segment of the full solar spectrum on the Planckian locus, and achieve dimming of the full solar spectrum, so that the lighting light source obtained according to the above design method can better simulate the solar spectrum.

[0035] In summary, the present application includes at least one of the following beneficial effects:

[0036] 1. The present application provides a lighting source and a lighting source design method, so that the lighting source of the present application can achieve full-range dimming of the solar spectrum required for daily life, making the lighting source more user-friendly;

[0037] 2. Using warm white light source, cold white light source and light distribution light source for dimming, the light distribution light source can be further used to supplement the light source after the warm white light source and the cold white light source are mixed to the corresponding wavelength of the missing section of sunlight;

[0038] 3. The present application provides a method for determining the color coordinates of a warm white light source, a cold white light source, and a light distribution light source, so that the color coordinates of the warm white light source, the cold white light source, and the light distribution light source determined according to the color coordinate determination method provided by the present application can meet the dimming of the corresponding Planckian locus curve segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is the chromaticity diagram;

[0040] Figure 2 It is the distribution position diagram of warm white light source, cold white light source and light distribution light source on the chromaticity diagram;

[0041] Figure 3It is the luminous spectrum of lighting sources on the market;

[0042] Figure 4 It is the full solar spectrum;

[0043] Figure 5 It is a spectrum superposition diagram of cold white light source plus warm white light source in different proportions;

[0044] Figure 6 It is a design scheme with consistent chips for three light sources: cold white light source, warm white light source and light distribution light source;

[0045] Figure 7 It is a three-way light source chip design with warm white light source and strong red light. DETAILED DESCRIPTION

[0046] See also Figure 1 , Figure 1 The chromaticity diagram is shown in Figure 1, in which the black curve is the Planckian locus, which is a curve formed by the corresponding points of black body radiation at different temperatures on the chromaticity diagram. The traditional dimming scheme uses two original light sources to achieve dimming. According to the color mixing principle, the two original light sources are mixed to form a mixed light, and the color coordinates of the mixed light are located on the line connecting the color coordinates of the two original light sources. In order to achieve dimming of the entire solar spectrum, the dimming range needs to cover all coordinate points on the Planckian locus. Obviously, it is difficult to cover all coordinate points on the curved Planckian locus using two original light sources for dimming. Therefore, a human-caused lighting source with a full solar spectrum and a design method thereof are proposed in the present application.

[0047] The embodiment of the present application discloses a human-caused lighting source with a full solar spectrum, including three original light sources: a cold white light source, a warm white light source, and a light distribution light source. According to the color mixing principle of color coordinates, by setting the color coordinate points of the cold white light source, the warm white light source, and the light distribution light source, the light color corresponding to any color coordinate in the area surrounded by the three color coordinate points can be obtained by weighted calculation of the cold white light source, the warm white light source, and the light distribution light source. Therefore, when the area surrounded by the color coordinates of the cold white light source, the warm white light source, and the light distribution light source covers the corresponding curve segment on the Planckian locus, the full solar spectrum simulation of the corresponding curve segment of the Planckian locus can be achieved.

[0048] The color temperature of the cold white light source is greater than or equal to 5000K, the color temperature of the warm white light source is less than or equal to 4000K, and the triangle formed by the color coordinates of the light source, the color coordinates of the warm white light source, and the color coordinates of the cold white light source covers the curve segment where the full solar spectrum is located on the Planckian locus. In the present application, the curve segment where the full solar spectrum is located is understood to be any curve segment on the Planckian locus selected according to daily lighting needs; further preferably, the curve segment where the full solar spectrum is located includes a first endpoint and a second endpoint, the first endpoint is located at the color coordinate point of the cold white light source, and the second endpoint is close to the warm white light source. According to daily lighting habits and international standard color temperature regulations, the first endpoint can be selected at a color temperature of 5000K, 5700K, 6500K, 7000K, etc., and the second endpoint can be selected at a color temperature of 2700K, 3000K, 3500K, 4000K, etc. In summary, by adjusting the positions of the warm white light source, the cold white light source and the light distribution light source, coverage of different full solar spectrum curve segments on the Planckian locus can be achieved.

[0049] Specifically, three independently regulated light source areas are connected in parallel in a COB light source, and the three independently regulated light source areas are respectively a cold white light source, a warm white light source and a light distribution light source, wherein the color coordinates of the cold white light source are located on the Planckian locus. Since the luminous flux of the warm white light source is usually smaller than that of the cold white light source, the color coordinates of the warm white light source are set below the Planckian locus, and the color coordinates of the light distribution light source are set above the Planckian locus, and the light distribution light source is set above the tangent of the Planckian locus where the color coordinates of the warm white light source are located. The color coordinates of the cold white light source are set to (x c ,y c ), the color coordinates of the warm white light source are (x w ,y w ), the color coordinates of the light source are (x m ,y m ); The color coordinates of the cold white light source are on the Planckian locus, and the color coordinates of the warm white light source satisfy y w ≤-3x w 2 +2.87x w -0.275, the color coordinates of the light source meet y m ≥(2.87-6x c )x m +3x c 2 -0.275, by adjusting the color coordinate points of the cold white light source, warm white light source and light distribution light source accordingly, the area surrounded by the color coordinates of the three points of the cold white light source, warm white light source and light distribution light source can be adjusted to cover different segments of the Planckian trajectory and realize full-spectrum dimming of different curve segments on the Planckian trajectory.

[0050] Please refer to Figure 2Furthermore, since the traditional warm color temperature is 2700K, and the highest color temperature of sunlight in a day is usually 6500K, the lighting source of this application only needs to cover the range of color temperature from 2700K to 6500K on the Planckian locus, which can meet the full solar spectrum dimming requirements of daily life. c0 ,y c0 ) is set at the Planckian locus color temperature of 6500K, corresponding to Figure 2 The black point on the Planckian locus; the color coordinates of the warm white light source (x w0 ,y w0 ) is set to the lower right of the Planckian locus at a color temperature of 2700K, corresponding to Figure 2 At the four-pointed star below the Planckian locus; the color coordinates of the light source (x m0 ,y m0 ) is set above the tangent line at 6500K on the Planckian locus, corresponding to Figure 2 At the hexagonal star above the middle Planckian locus; at the same time, the color coordinates of the light distribution light source and the color coordinates of the warm white light source pass through the 2700K color temperature coordinate point (0.462, 0.416) on the Planckian locus, that is, the area enclosed by the color coordinates of the three light sources, the warm white light source, and the light distribution light source, covers the curve segment from color temperature 2700K to color temperature 6500K on the Planckian locus.

[0051] Among them, since the Planckian locus is an upward convex curve, in order to ensure that the curve segments from the Planckian locus color temperature of 2700K to the Planckian locus color temperature of 6500K can be surrounded by the triangle formed by the color coordinates of the cold white light source, the warm white light source and the light distribution light source, the color coordinates of the light distribution light source should be above the tangent of the Planckian locus at the color temperature of 6500K.

[0052] At this time, the color coordinates of the cold white light source are (0.315, 0.327), and the color coordinates of the warm white light source satisfy y w0 ≤-3x w0 2 +2.87y w0 -0.275-0.002, that is, y w0 ≤-3x w0 2 +2.87y w0 -0.277, the color coordinates of the light source meet y m0 ≥0.98x m0 +0.018.

[0053] The color coordinate selection principle of the above-mentioned cold white light source, warm white light source and light distribution light source is as follows: Taking two original light sources as an example, according to the light mixing equation group

[0054]

[0055] It can be seen that if the luminous flux of the two original light sources is equal, the maximum luminous flux can be obtained through Y m The calculation found that the maximum luminous flux that can be obtained at any point on the connecting line is greater than the luminous flux of the two original light sources alone, and the maximum luminous flux value should be Y m =Y1+Y2. Since the luminous flux of a warm white light source is usually smaller than that of a cold white light source, when a light source with a color temperature of 6500K is needed, only the cold white light source needs to be lit. At this time, if the warm white light source is set at the Planckian locus color temperature of 2700K, when a light source with a color temperature of 2700K is needed, only the warm white light source needs to be lit, which will make the luminous flux of the warm white light source alone lower than that of the cold white light source alone, making the lighting source uneven in brightness and poor in use experience.

[0056] Therefore, it is necessary to set the warm white light source below the Planckian locus color temperature of 2700K, and set the light distribution light source above the Planckian locus, and the color coordinate connection line of the light distribution light source and the warm white light source passes through the Planckian locus color temperature of 2700K. On the one hand, the area surrounded by the warm white light source, the cold white light source and the light distribution light source can cover the Planckian locus color temperature segment of 2700K-6500K. On the other hand, the luminous flux at the Planckian locus color temperature of 2700K is the sum of the luminous flux of the warm white light source and the luminous flux of the light distribution light source, thereby making the luminous flux at the Planckian locus color temperature of 2700K the same as the luminous flux at the Planckian locus color temperature of 6500K, thereby improving the comfort of using the lighting source.

[0057] Since the red spectrum in the warm white light source is more, and the efficiency of converting blue light LED into red light is low, the electro-optical conversion efficiency of the red light chip is also lower than that of the blue light chip. When the chip composition is the same, the luminous flux of the cold white light source with a color temperature of 6500K is about 10% larger than the luminous flux of the warm white light source with a color temperature of 2700K. In order to make the dimmable warm white luminous flux after the warm white light source and the light-matching light source mixed not less than the dimmable cold white luminous flux, the luminous flux ratio of the warm white light source and the light-matching light source cannot be greater than 9:1. Based on this, the distance between the warm white light source and the Planckian locus is calculated to obtain the color coordinate value y of the warm white light source. w0 Compared to w ≤-3x w 2 +2.87x w -0.275, should be subtracted by 0.02, so the color coordinate y of the warm white light source is obtained w0 ≤-3x w0 2 +2.87y w0 -0.277.

[0058] At this point, the color coordinates of the cold white light source, the warm white light source, and the light distribution light source have been determined. In the three-color lighting source of the present application, in order to avoid the extremely high cost of using three independent power dimming methods to achieve simple dimming, generally use a warm white light source, a cold white light source, and a light distribution light source with the same voltage. Since the voltage difference between the blue light chip, the red light chip, and the purple light chip is large, the chip composition of the warm white light source, the cold white light source, and the light distribution light source should also be consistent.

[0059] Reference Figure 3 The luminous spectrum of the lighting sources currently on the market is shown in Table 1. Figure 4 It is a true full solar spectrum, and because too strong purple light is not good for the human body, short-wavelength light is currently sufficient and does not need to be supplemented. From this, it can be concluded that the current lighting sources on the market are lacking in the long-wavelength red light range compared to sunlight and need to be supplemented.

[0060] At present, a lighting source chip on the market uses 400-420nm purple light chip, 425-445nm blue light chip, 445-465nm blue light chip, 470-490nm cyan light chip combined with green light phosphor, yellow-green light phosphor, orange light phosphor, 610-630nm red light phosphor, 640-670nm red light phosphor, and the red light wavelength peak is between 660-670nm. In order to improve the continuity of the red light spectrum, the lighting source of the present application adds a red light LED chip with a wavelength of 690-730nm while adding a red phosphor with a wavelength of 660-670nm in the warm white light source, and makes the intensity of the red light spectrum at 730nm greater than or equal to half of the peak wavelength in the range of 670-730nm, thereby supplementing the missing wavelength in the red light range.

[0061] Reference Figure 5 This is a spectrum superposition diagram of cold white light source plus warm white light source in different proportions, where one part of cold white light source plus 0.5 part of warm white light source superimposes the spectrum formed, that is, Figure 5 The green curve segment, Figure 4 The curve of the mid-solar spectrum is the closest, but the superimposed spectrum is slightly lower than the solar spectrum in the wavelength range of 480nm-650nm, indicating that the superimposed spectrum of the cold white light source and the warm white light source is missing in the wavelength range of 480nm-650nm and needs to be supplemented. Among them, the missing band covers the 480nm human blue band and the green light band that is harmless to the human body.

[0062] The missing green light band is supplemented by using a light distribution light source. Specifically, the spectrum wavelength range of the light distribution light source includes 480nm-650nm, and the short-wave half-height position of the spectrum of the light distribution light source is 470nm-490nm, and the long-wave half-height position is 640nm-660nm. At the same time, the lighting light source of the present application adds a supplementary chip, so that the wavelength of the light source of the supplementary chip is 480nm to supplement the missing human blue band.

[0063] In the specific chip design process, refer to Figure 6 , the lighting light source of the present application preferably adopts a solution in which the three light source chips of the cold white light source, the warm white light source and the light distribution light source are set in complete consistency, such as the number ratio of 410nm purple light chip: 440nm blue light chip: 455nm blue light chip: 470nm cyan light chip is 1:4:5:2 for series setting. The chips of the three light sources of the cold white light source, the warm white light source and the light distribution light source are set in complete consistency, and the same graded chips are used. Under the same voltage drive, the light intensity of each channel can be adjusted by variable current to achieve the setting of the lighting light source.

[0064] In a further preferred embodiment, referring to Figure 7 , for the solution with strong red light intensity, that is, the color coordinates of the warm white light source are more offset to the lower right compared to the Planckian trajectory color temperature of 2700K, it is necessary to adjust the chip composition of the warm white light source to achieve stronger red light. Since the voltage of the blue LED chip is about 3V and the voltage of the red LED chip is about 2V, we can reduce 1 455nm blue light chip and 1 440nm blue light chip respectively and increase the solution of 3 red light LED chips. However, in actual operation, due to the difference in chip voltage grading, it is difficult for the voltage of 2 blue light LED chips to completely match the voltage of 3 red light LED chips, and the current of LED increases exponentially with the increase of voltage in the forward working area, so the voltage of the parallel circuit cannot have a significant difference. At this time, a constant current IC is used to achieve it. By connecting a constant current IC in parallel to each circuit, the three parallel circuits are all driven by the same current, and then the power-on time of the PWM duty cycle fast on and off adjustment circuit is used to achieve the light output adjustment of cold white, warm white and light distribution light sources.

[0065] The present application also discloses a method for designing a human-factor lighting source for a full solar spectrum, comprising the following steps:

[0066] S1: Determine the color coordinates of a cold white light source on the Planckian locus and use them as the first endpoint of the full solar spectrum curve segment, wherein the color temperature of the cold white light source is greater than or equal to 5000K;

[0067] S2: Draw a tangent line of the Planckian locus at the color coordinates of the cold white light source;

[0068] S3: determining the color coordinates of the warm white light source below the second endpoint of the full solar spectrum curve segment, wherein the second endpoint of the full solar spectrum curve segment is located on the Planckian locus, and the color temperature of the warm white light source is less than or equal to 4000K;

[0069] S4: Connect the color coordinates of the warm white light source and the second endpoint and extend the line to above the tangent line;

[0070] S5: Determine the color coordinates of the light distribution light source in the portion of the connecting line located above the tangent line.

[0071] Furthermore, the present application also discloses a preferred embodiment of a method for designing a human factors lighting source for a full solar spectrum, comprising the following steps:

[0072] A1: Determine the color coordinates of the cold white light source at a color temperature of 6500K in the Planckian locus;

[0073] A2: Draw a tangent line at the color temperature of 6500K in the Planckian locus;

[0074] A3: Determine the color coordinates of the warm white light source at the lower right corner of the Planckian locus where the color temperature is 2700K, and the color temperature of the warm white light source is less than or equal to 4000K;

[0075] A4: Connect the color coordinates of the warm white light source and the color temperature of 2700K in the Planckian locus and extend the line to above the tangent line;

[0076] A5: Determine the color coordinates of the light distribution light source in the portion of the connecting line located above the tangent line.

[0077] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A human-caused lighting source with a full solar spectrum, characterized in that: include: Cold white light source, color temperature greater than or equal to 5000K; Warm white light source, color temperature less than or equal to 4000K; The color coordinates of the light source are connected with the color coordinates of the warm white light source and the color coordinates of the cold white light source to form a triangle covering the curve segment of the full solar spectrum on the Planckian locus; the color coordinates of the cold white light source are located on the Planckian locus, the color coordinates of the warm white light source are located below the Planckian locus, and the color coordinates of the light source are located above the Planckian locus. The color coordinate point of the cold white light source is set to (x c ,y c ), the color coordinate point of the warm white light source is (x w ,y w ), the color coordinate point of the light distribution light source is (x m ,y m ), the cold white light source is located on the Planckian locus, and the color coordinates of the warm white light source satisfy y w ≤-3x w 2 +2.87x w -0.275, the color coordinates of the light source satisfy y m ≥(2.87-6x c )x m +3x c 2 -0.

275.

2. The full solar spectrum human-caused lighting source according to claim 1, characterized in that: The color coordinates of the cold white light source are located at a color temperature of 6500K in the Planckian locus, and a line connecting the color coordinates of the warm white light source and the color coordinates of the light distribution light source passes through a color temperature of 2700K in the Planckian locus.

3. A full solar spectrum human factor lighting source according to claim 2, characterized in that: The color coordinates of the light distribution light source are located above the tangent line at the color temperature of 6500K in the Planckian locus.

4. A full solar spectrum human-caused lighting source according to claim 2 or 3, characterized in that: The color coordinates (x c ,y c ) is (0.315, 0.327), and the color coordinate point of the warm white light source is set to (x w0 ,y w0 ), the color coordinate point of the light distribution light source is (x m0 ,y m0 ), the color coordinates of the warm white light source satisfy y w0 ≤-3x w0 2 +2.87x w0 -0.275-0.002, the color coordinates of the light source satisfy y m0 ≥0.98x m0 +0.

023.

5. The full solar spectrum human-caused lighting source according to claim 1, characterized in that: The light distribution light source also includes a supplementary chip, and the wavelength of the light source of the supplementary chip is 480nm.

6. The full solar spectrum human-caused lighting source according to claim 1, characterized in that: The warm white light source includes a red light chip with a wavelength of 690-730nm.

7. A method for designing a human-factor lighting source for the entire solar spectrum, characterized in that: The design steps include: S1: Determine the color coordinates of a cold white light source on the Planckian locus and use them as the first endpoint of the full solar spectrum curve segment, wherein the color temperature of the cold white light source is greater than or equal to 5000K; S2: Draw a tangent line of the Planckian locus at the color coordinates of the cold white light source; S3: determining the color coordinates of the warm white light source below the second endpoint of the full solar spectrum curve segment, wherein the second endpoint of the full solar spectrum curve segment is located on the Planckian locus, and the color temperature of the warm white light source is less than or equal to 4000K; S4: Connect the color coordinates of the warm white light source and the second endpoint and extend the line to above the tangent line; S5: Determine the color coordinates of the light source in the portion of the connecting line located above the tangent line, wherein the color coordinate point of the cold white light source is set to (x c ,y c ), the color coordinate point of the warm white light source is (x w ,y w ), the color coordinate point of the light distribution light source is (x m ,y m ), the cold white light source is located on the Planckian locus, and the color coordinates of the warm white light source satisfy y w ≤-3x w 2 +2.87x w -0.275, the color coordinates of the light source satisfy y m ≥(2.87-6x c )x m +3x c 2 -0.275.

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