Multi-channel multi-dimension quasi-natural light spectrum artificial light source design method

Abstract

The application provides a multi-channel multi-dimension quasi-natural spectrum artificial light source design method, which comprises the following steps: acquiring an adjustment range of a quasi-natural spectrum; setting a generalized color temperature track adjustment section under chromaticity coordinates, a first channel located at one end of the generalized color temperature track adjustment section, and a second channel located at the other end of the generalized color temperature track adjustment section based on the adjustment range; setting a third channel on the convex side of the generalized color temperature track adjustment section based on the first channel and the second channel; and constructing an artificial light source by using the first channel, the second channel and the third channel, wherein the artificial light source can emit light with chromaticity coordinates located on the generalized color temperature track adjustment section.

Description

Technical Field

[0001] This invention relates to the field of light source design, and in particular to a method for designing a light source with a multi-channel, multi-dimensional pseudo-natural spectrum. Background Technology

[0002] As people's demand for light source quality and healthy lighting continues to increase, higher requirements are being placed on the control of the spectral characteristics, color rendering, color difference, and physiological effects of artificial light sources (such as those used for lighting, screen backlighting, or e-ink screen front light).

[0003] Current mainstream light mixing technologies can be mainly divided into three categories:

[0004] A. Pure color light source mixing scheme represented by RGB.

[0005] This scheme uses three narrow-spectrum light sources—red, green, and blue—for light mixing. Its principle is based on the human eye's trichromatic vision model; theoretically, by adjusting the intensity ratio of these three sources, any color within the color gamut and white light of various color temperatures can be mixed. However, under any light color parameter setting, the spectrum is not flat and deviates significantly from the natural spectrum, causing color casts on objects under illumination. Furthermore, the high-energy short-wavelength blue light can adversely affect the cornea and retina.

[0006] B. Dual-color temperature mixing scheme.

[0007] This scheme typically uses a pair of white LEDs with significantly different color temperatures (such as warm white 2000K and cool white 6500K) to mix the light, and by adjusting the brightness ratio of the two, an intermediate color temperature between the two is obtained.

[0008] On the chromaticity diagram, the trajectory of blackbody radiation (Planck's trajectory) is a curve that bends slightly towards the green-magenta axis (e.g., ...). Figure 1 (As shown). The chromaticity coordinates of the mixture of two fixed color temperature white lights can only fall on the straight line connecting these two points; see [link to relevant documentation] for details. Figure 1 The 2000K white light source A11 and the 6500K white light source A12, when combined to form a mixed white light source A13, will deviate from the Planck locus. Therefore, except for the two endpoint color temperatures, the chromaticity coordinates of any intermediate mixed color temperature will deviate from the Planck locus, resulting in an unnatural green or magenta tint to the mixed white light, a decrease in color rendering, and an increase in color difference.

[0009] C. Hybrid light mixing schemes represented by RGBWW.

[0010] This scheme is a combination of the two schemes mentioned above, and is usually composed of RGB color channels, WW (warm white) and CW (cool white) white light channels.

[0011] This solution utilizes a white light channel to provide basic illumination and spectral breadth, while using RGB channels to compensate for color shift issues in dual-color-temperature mixing, thus combining the advantages of both to some extent. However, when outputting at a color temperature other than the original white light channel, it is necessary to rely on narrow-spectrum RGB light to correct the chromaticity coordinates. This means that the final spectrum will still retain narrow-spectrum peaks from the RGB light source, failing to fundamentally solve the problems of spectral discontinuity, color distortion of objects, and the potential physiological effects caused by narrow-spectrum blue light peaks. The output white light is still significantly different from truly "natural" at the spectral level.

[0012] Therefore, there is a need to provide a light source design method that can achieve wide-range color temperature adjustment, high color rendering, low color difference, and natural continuous spectrum output with multi-channel and multi-dimensional pseudo-natural spectrum. Summary of the Invention

[0013] This invention provides a method for designing a multi-channel, multi-dimensional pseudo-natural spectrum that can achieve wide-range color temperature adjustment, high color rendering, low color difference, and natural continuous spectrum output.

[0014] This invention provides a method for designing artificial light sources with multi-channel, multi-dimensional pseudo-natural spectra, comprising:

[0015] Obtain the adjustment range of the pseudo-natural spectrum;

[0016] Based on the adjustment range, a generalized color temperature trajectory adjustment segment under chromaticity coordinates is set, along with a first channel located at one end of the generalized color temperature trajectory adjustment segment and a second channel located at the other end of the generalized color temperature trajectory adjustment segment;

[0017] Based on the first channel and the second channel, a third channel is provided on the convex side of the generalized color temperature trajectory adjustment segment;

[0018] The first channel, the second channel, and the third channel are used to construct an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0019] This invention also provides a method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum, comprising:

[0020] Obtain the adjustment range of the pseudo-natural spectrum;

[0021] Based on the adjustment range, a generalized color temperature trajectory adjustment segment in chromaticity coordinates is set, along with at least two first channels located at one end of the generalized color temperature trajectory adjustment segment and a second channel located at the other end of the generalized color temperature trajectory adjustment segment;

[0022] Obtain the first channel point of each first channel in the chromaticity coordinates, and set the synthesized first channel based on at least two first channel points;

[0023] Based on the first and second channels, a third channel is provided on the convex side of the generalized color temperature trajectory adjustment segment;

[0024] Each of the first channel, the second channel, and the third channel constitutes an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0025] This invention also provides a method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum, comprising:

[0026] Obtain the adjustment range of the pseudo-natural spectrum;

[0027] Based on the adjustment range, a generalized color temperature trajectory adjustment segment under chromaticity coordinates is set, along with at least two first channels located at one end of the generalized color temperature trajectory adjustment segment and at least two second channels located at the other end of the generalized color temperature trajectory adjustment segment;

[0028] Obtain the first channel point of each first channel in the chromaticity coordinates, and set the synthesized first channel based on at least two first channel points;

[0029] Obtain the second channel point of each second channel in the chromaticity coordinates, and set the synthesized second channel based on at least two second channel points;

[0030] Based on the first and second synthetic channels, a third channel is provided on the convex side of the generalized color temperature trajectory;

[0031] An artificial light source is constructed using each of the first channel, each of the second channel, and the third channel, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0032] Compared with the prior art, the beneficial effects of this invention are as follows: The multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of this invention sets a third channel on the convex side of the corresponding generalized color temperature trajectory adjustment segment, so that the triangle formed by the first channel point, the second channel point, and the third channel point in the chromaticity coordinates can basically cover the complete generalized color temperature trajectory adjustment segment. Thus, by using the first channel, the second channel, and the third channel, a wide range and natural continuous color temperature adjustment can be achieved in the generalized color temperature trajectory adjustment segment. Moreover, the mixed white light after this configuration does not have unnatural green or red tones, and has high color rendering and low color difference. It effectively solves the technical problems of uneven white light spectrum, poor color rendering, and large color difference of existing artificial light sources.

[0033] Furthermore, the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention can set multiple first channels and / or multiple second channels, so that different first channels and / or different second channels can be used to construct the same pseudo-natural spectrum artificial light source, which can meet the user's needs for artificial light source use in different environments. Attached Figure Description

[0034] Figure 1 The colorimetric diagrams of two white light sources and a mixed white light source in the existing dual-color temperature mixing scheme are shown.

[0035] Figure 2a This is a flowchart of a first specific embodiment of the artificial light source design method with multi-channel and multi-dimensional pseudo-natural spectrum of the present invention;

[0036] Figure 2b , Figure 2c The first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention is a specific chromaticity diagram and spectral diagram constructed by three-channel light mixing;

[0037] Figure 3 This is one of the schematic diagrams showing the setting of the third channel in a first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where both the first and second channels are located on the convex side of the generalized color temperature trajectory adjustment segment.

[0038] Figure 4 , Figure 5 This is the second schematic diagram of the setting of the third channel in the first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where both the first and second channels are located on the convex side of the generalized color temperature trajectory adjustment segment.

[0039] Figure 6 This is one of the schematic diagrams showing the setting of the third channel in a first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where the first channel and the second channel are respectively located on both sides of the generalized color temperature trajectory adjustment segment;

[0040] Figure 7 This is the second schematic diagram of the setting of the third channel in the first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where the first channel and the second channel are respectively located on both sides of the generalized color temperature trajectory adjustment segment.

[0041] Figure 8 This is the third schematic diagram showing the setting of the third channel in the first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where the first channel and the second channel are respectively located on both sides of the generalized color temperature trajectory adjustment segment;

[0042] Figure 9This is a schematic diagram showing the setting of the third channel in a first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, where both the first and second channels are located on the concave side of the generalized color temperature trajectory adjustment segment.

[0043] Figure 10 This is a flowchart of a second specific embodiment of the artificial light source design method with multi-channel and multi-dimensional pseudo-natural spectrum of the present invention;

[0044] Figure 11a This is a schematic diagram showing the setting of the third channel in a second specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention when there are two first channels;

[0045] Figure 11b , Figure 11c This is a schematic diagram of a first specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention, constructed by four-channel light mixing.

[0046] Figure 11d A schematic diagram illustrating the light mixing process using the first channel, which has a higher light intensity at a wavelength of approximately 490nm.

[0047] Figure 11e A schematic diagram illustrating the light mixing process using the first channel, which has a higher light intensity at a wavelength of approximately 450nm.

[0048] Figure 12 This is a schematic diagram showing the setting of the third channel in a second specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention when there are at least three first channels;

[0049] Figure 13 This is a flowchart of a third specific embodiment of the artificial light source design method for multi-channel, multi-dimensional pseudo-natural spectrum of the present invention. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the diagram, units with similar structures are represented by the same labels.

[0052] The multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention can be used for the design of artificial mixed white light sources. The designed mixed light source has high color rendering and low color difference; and can achieve wide-range and continuous color temperature adjustment within the preset pseudo-natural spectrum adjustment range. It can be flexibly applied in various special lighting scenarios, such as daytime and nighttime lighting in museums, or environmental lighting in health centers, etc.

[0053] Please refer to Figure 2a , Figure 2a This is a flowchart of a first specific embodiment of the artificial light source design method for multi-channel, multi-dimensional pseudo-natural spectra of the present invention. The artificial light source design method of this embodiment includes the following steps:

[0054] Step S201: Obtain the adjustment range of the pseudo-natural spectrum;

[0055] Step S202: Based on the adjustment range, set the generalized color temperature trajectory adjustment segment under the chromaticity coordinates, the first channel located at one end of the generalized color temperature trajectory adjustment segment, and the second channel located at the other end of the generalized color temperature trajectory adjustment segment;

[0056] Step S203: Based on the first channel and the second channel, a third channel is set on the convex side of the generalized color temperature trajectory adjustment segment;

[0057] Step S204: Use the first channel, the second channel and the third channel to form an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0058] The specific process of each step in this embodiment is described in detail below.

[0059] In step S201, the user first needs to set the adjustment range of the natural spectrum of the artificial mixed light source to be designed, that is, to obtain the corresponding generalized color temperature trajectory. This generalized color temperature trajectory is the trajectory swept on the chromaticity diagram by the chromaticity coordinates of the emission of a certain light source (to be simulated) as its emission color temperature changes. This generalized color temperature trajectory can be different color temperature trajectories such as the Planck trajectory or the daylight trajectory, etc. Figure 1 As shown in the chromaticity diagram, Figure 1 The chromaticity diagram in the image is the CIE 1976 uniform chromaticity scale diagram, and the curves within it are Planck curves representing the colors of blackbody radiation at different temperatures, i.e., the chromaticity coordinates of blackbody radiation at different temperatures swept across the chromaticity diagram. This Planck curve represents the colors of blackbody radiation at different temperatures on the chromaticity diagram. This embodiment can also be applied to adjusting the color temperature of sunlight in sunlight trails.

[0060] Since the artificial mixed light source to be designed needs to be as close as possible to the natural spectrum, the corresponding color temperature adjustment range can be obtained directly on the generalized color temperature trajectory. For example, if a mixed light source with a color temperature of 2000K (warm white light source) to 6500K (cool white light source) needs to be designed, the generalized color temperature trajectory between white light source A11 and white light source A12 can be directly obtained as the adjustment range of the pseudo-natural spectrum of the artificial mixed light source (the color temperature adjustment range of pseudo-natural white light).

[0061] In step S202, in order to enable the artificial mixed light source to constitute most of the pseudo-natural white light within the adjustment range, the adjustment range is set as a generalized color temperature trajectory adjustment segment under chromaticity coordinates. A first channel (cool white light source) is set at one end of the generalized color temperature trajectory adjustment segment (such as the high color temperature end), and a second channel (warm white light source) is set at the other end of the generalized color temperature trajectory adjustment segment (such as the low color temperature end). The chromaticity coordinates of the first channel should be close to the chromaticity coordinates of the white light source A11, and the chromaticity coordinates of the second channel should be close to the chromaticity coordinates of the white light source A12.

[0062] In this embodiment, both the first and second channels are white light channels, near-white light channels, or broadband light channels located on or near the generalized color temperature trajectory adjustment segment. Here, the near-white light channel is defined as follows: on the CIE 1976 UCS chromaticity diagram, the Euclidean distance |Δu'v'| from the chromaticity coordinate point of the near-white light channel to the generalized color temperature trajectory is less than or equal to 0.05. The broadband light channel is a third channel with a full width at half maximum (FWHM) greater than 100 nm, where the FWHM of the colored LEDs is less than 50 nm. If there are multiple peaks with peak values ​​greater than 50% of the highest peak value, the valleys between these peaks are first filled to form a single peak, and then the FWHM is calculated. Peaks with peak values ​​less than 50% of the highest peak value are ignored, and valley values ​​greater than or equal to 50% of the highest peak value are not considered distinct peaks.

[0063] In step S203, after setting the second and first channels, a third channel can be set on the convex side of the generalized color temperature trajectory adjustment segment based on the first and second channels. This allows the first channel point in chromaticity coordinates, the second channel point in chromaticity coordinates, and the third channel point in chromaticity coordinates to form a triangle encompassing most of the generalized color temperature trajectory adjustment segment. Subsequently, by adjusting the power ratios of the first, second, and third channels in the artificial light source, the artificial light source can become a pseudo-natural light source corresponding to any point in the generalized color temperature trajectory adjustment segment within this triangle, representing any chromaticity coordinate. Between the highest and lowest color temperatures within the convex polygonal region enclosed by these channels in the chromaticity diagram, this pseudo-natural light source achieves good color difference control and excellent light mixing output. The third channel here can be a broadband light channel, a white light channel, or a near-white light channel.

[0064] The first channel here refers to the optical channel that is closer to one end of the generalized color temperature trajectory adjustment segment than the second and third channels. The second channel refers to the optical channel that is closer to the other end of the generalized color temperature trajectory adjustment segment than the first and second channels. The projection point of the third channel on the generalized color temperature trajectory adjustment segment is generally located on the generalized color temperature trajectory adjustment segment between the projection point of the first channel on the generalized color temperature trajectory adjustment segment and the projection point of the second channel on the generalized color temperature trajectory adjustment segment.

[0065] In step S204, based on the color temperature of the artificial white light source provided by the user, the first, second, and third channels described above can be used to construct a corresponding artificial light source. The chromaticity coordinates of the light emitted by this artificial light source can be any point within the generalized color temperature trajectory adjustment segment. Here, the first, second, and third channels can be three physical LEDs of different colors that can be controlled independently, or physical LEDs with multiple chips whose brightness can be controlled independently. A specific schematic diagram of the three-channel light mixing configuration is shown below. Figure 2b and 2c As shown.

[0066] The following describes in detail how, in step S203, a third channel is set on the convex side of the generalized color temperature trajectory adjustment segment based on the first and second channels.

[0067] For example, both the first and second channels are located on the convex side of the generalized color temperature trajectory adjustment segment. Specifically, for example... Figure 3 As shown, the curve in the figure represents the generalized color temperature trajectory adjustment segment, which includes the first channel A31 and the second channel A32.

[0068] Subsequently, a ray tangent to the generalized color temperature trajectory adjustment segment can be drawn from the first channel point (A31) in the chromaticity coordinates towards the second channel (A32). This ray is called the first positive tangent line B31. Simultaneously, a ray tangent to the generalized color temperature trajectory adjustment segment can be drawn from the second channel point (A32) in the chromaticity coordinates towards the first channel (A31). This ray is called the second positive tangent line B32. Finally, the chromaticity coordinates of the intersection of the first positive tangent line B31 and the second positive tangent line B32 are set as the third channel A33.

[0069] Figure 3The triangle formed by the first channel A31, the second channel A32, and the third channel A33 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A31 and the second channel A32. Therefore, in the subsequent step S204, the system can use the first channel A31, the second channel A32, and the third channel A33 to construct a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point on the generalized color temperature trajectory covered by the triangle. Therefore, the artificial light source has high color rendering and low color difference, and has a wide and natural continuous color temperature adjustment capability.

[0070] If both the first and second channels are located on the convex side of the generalized color temperature trajectory adjustment segment, but the first and second channels are relatively close in chromaticity coordinates, specifically as follows: Figure 4 As shown in the figure, the figure includes the first channel A41 and the second channel A42. If the third channel A43 is formed using the above method, the triangle formed by the first channel A41, the second channel A42 and the third channel A43 in the chromaticity coordinates does not cover any generalized color temperature trajectory. As a result, the chromaticity coordinates of the light emitted by the artificial light source formed subsequently cannot be located on the generalized color temperature trajectory. Therefore, the above method for determining the third channel fails.

[0071] In the above situation, the system can set the first channel point as a mirror point relative to the first channel of the generalized color temperature trajectory adjustment segment, and set this first channel mirror point as the third channel point, such as... Figure 5 As shown in the figure, the figure includes a first channel A51 and a second channel A52. Here, the second channel mirror point of the second channel A52 relative to the generalized color temperature trajectory adjustment segment is obtained, and the second channel mirror point is set as the third channel A53. In this way, the triangle formed by the first channel point of the first channel A51, the second channel point of the second channel A52, and the third channel point of the third channel A53 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A51 and the second channel A52. Therefore, in the subsequent step S204, the system can use the above-mentioned first channel A51, second channel A52, and third channel A53 to form a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory covered by the above-mentioned triangle.

[0072] In this scheme, the channel projection point refers to the point on the generalized color temperature trajectory that is closest to the channel point; the projection point of the channel mirror point on the generalized color temperature trajectory is the same as the projection point of the channel point on the generalized color temperature trajectory, and the distance between the channel mirror point and the projection point is equal to the distance between the channel point and the projection point.

[0073] For example, the first channel is located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel is located on the concave side of the generalized color temperature trajectory adjustment segment. Specifically, as follows... Figure 6As shown in the figure, the first channel A61 and the second channel A62 are included.

[0074] Subsequently, a ray tangent to the generalized color temperature trajectory adjustment segment can be drawn from the first channel point of the first channel A61 in the chromaticity coordinates towards the second channel A62. This ray is called the first positive tangent line B61.

[0075] Then, the second channel A62 is set to the second channel projection point A621 of the generalized color temperature trajectory adjustment segment in the chromaticity coordinates. The system can draw a ray tangent to the generalized color temperature trajectory adjustment segment based on this projection point A621 (when the ray cannot be tangent to the generalized color temperature trajectory adjustment segment, it can be set to be parallel to the extension line of the generalized color temperature trajectory adjustment segment, or the extension line of the generalized color temperature trajectory adjustment segment can be the asymptote of the ray). The extension direction of this ray is away from the position of the first channel A61, and the reverse extension line of this ray is called the second reverse tangent B62. Finally, the system sets the chromaticity coordinates of the intersection of the first positive tangent B61 and the second reverse tangent B62 as the third channel A63.

[0076] Figure 6 The triangle formed by the first channel A61, the second channel A62, and the third channel A63 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A61 and the second channel A62. Therefore, in the subsequent step S204, the system can use the first channel A61, the second channel A62, and the third channel A63 to form a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory covered by the triangle.

[0077] In addition, users can obtain the second channel projection point A621 mentioned above through the following steps: First, obtain the second channel projection point A622 of the second channel point on the generalized color temperature trajectory adjustment segment; then, obtain the second channel mirror point of the second channel point relative to the generalized color temperature trajectory adjustment segment. Users can set the second channel projection point A621 on the line segment formed by the second channel projection point and the second channel mirror point as needed. Of course, the second channel projection point or the second channel mirror point can also be directly set as the second channel projection point A621. Figure 6 In this case, the mirror point of the second channel is directly set as the projection point A621 of the second channel, and then... Figure 6 As can be seen, if a user wants to set up a triangle with more generalized color temperature trajectory adjustment segments, the second channel projection point A621 can be set closer to the second channel mirror point, thus increasing the adjustment range of the artificial light source; if a user wants to set up a simple artificial light source (i.e., the corresponding triangle contains fewer generalized color temperature trajectory adjustment segments), the second channel projection point A621 can be set closer to the second channel projection point, thus decreasing the adjustment range of the artificial light source and making adjustment simpler.

[0078] For example, the first channel is located on the concave side of the generalized color temperature trajectory adjustment segment, and the second channel is located on the convex side of the generalized color temperature trajectory adjustment segment. Specifically, as follows... Figure 7 As shown in the figure, the first channel A71 and the second channel A72 are included.

[0079] Subsequently, a ray tangent to the generalized color temperature trajectory adjustment segment can be drawn from the second channel point A72 in the chromaticity coordinates towards the first channel A71. This ray is called the second positive tangent line B72.

[0080] Then, the system sets the first channel A71 in the chromaticity coordinates relative to the first channel projection point A711 of the generalized color temperature trajectory adjustment segment. Based on this projection point A711, the system can draw a ray tangent to the generalized color temperature trajectory adjustment segment. The extension direction of this ray is away from the position of the second channel A72, and the reverse extension line of this ray is called the first reverse tangent B71. Finally, the system sets the chromaticity coordinates of the intersection point of the second forward tangent B72 and the first reverse tangent B71 as the third channel A73.

[0081] Figure 7 The triangle formed by the first channel A71, the second channel A72, and the third channel A73 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A71 and the second channel A72. Therefore, in the subsequent step S204, the system can use the first channel A71, the second channel A72, and the third channel A73 to form a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory covered by the triangle.

[0082] In addition, users can obtain the aforementioned first channel projection point A711 through the following steps: First, the first channel projection point A712 of the first channel point on the generalized color temperature trajectory adjustment segment; then, obtain the first channel mirror point of the first channel point relative to the generalized color temperature trajectory adjustment segment. Users can set the first channel projection point A711 on the line segment formed by the first channel projection point A712 and the first channel mirror point as needed. Of course, the first channel projection point or the first channel mirror point can also be directly set as the first channel projection point A711. Figure 7 In this case, the mirror point of the first channel is directly set as the projection point A711 of the first channel.

[0083] For example, if the first channel is located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel is located on the concave side of the same segment, but the first and second channels are relatively close in chromaticity coordinates, specifically as follows: Figure 8As shown in the figure, there are first channel A81 and second channel A82. If the first positive tangent B81 and the second negative tangent B82 are formed using the above method, the method for determining the third channel will fail because the first positive tangent B81 and the second negative tangent B82 do not intersect.

[0084] In the above situation, the system can set the second channel point as the second channel mirror point relative to the generalized color temperature trajectory adjustment segment, and set this second channel mirror point as the third channel point, such as... Figure 8 As shown in the figure, the figure includes a first channel A81 and a second channel A82. Here, the mirror point of the second channel A82 relative to the generalized color temperature trajectory adjustment segment is obtained, and this mirror point is set as the third channel A83. In this way, the triangle formed by the first channel A81, the second channel A82, and the third channel A83 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A81 and the second channel A82. Therefore, in the subsequent step S204, the system can use the first channel A81, the second channel A82, and the third channel A83 to form a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory covered by the triangle.

[0085] For example, both the first and second channels are located on the concave side of the generalized color temperature trajectory adjustment segment. Specifically, as shown... Figure 9 As shown in the figure, the first channel A91 and the second channel A92 are included.

[0086] The system sets the first channel A91 in the chromaticity coordinates to the first channel projection point A911 of the generalized color temperature trajectory adjustment segment. The system can draw a ray tangent to the generalized color temperature trajectory adjustment segment based on this projection point. The extension direction of this ray is away from the position of the second channel A92. The reverse extension line of this ray is called the first reverse tangent line B91.

[0087] The system sets the second channel A92 in the chromaticity coordinates to the second channel projection point A921 of the generalized color temperature trajectory adjustment segment. The system can draw a ray tangent to the generalized color temperature trajectory adjustment segment based on this projection point. The extension direction of this ray is away from the position of the first channel A91. The reverse extension line of this ray is called the second reverse tangent line B92.

[0088] Finally, the system sets the chromaticity coordinates of the intersection of the first reverse tangent B91 and the second reverse tangent B92 as the third channel A93.

[0089] Figure 9The triangle formed by the first channel A91, the second channel A92, and the third channel A93 in the chromaticity coordinates can cover most of the generalized color temperature trajectory between the first channel A91 and the second channel A92. Therefore, in the subsequent step S204, the system can use the first channel A91, the second channel A92, and the third channel A93 to form a corresponding artificial light source. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory covered by the triangle.

[0090] The specific steps for obtaining the first channel projection point and the second channel projection point are the same as those in the above embodiments. Please refer to the specific descriptions in the above embodiments for details.

[0091] The artificial light source design method of this embodiment sets a first channel and a second channel at both ends of a preset generalized color temperature trajectory adjustment segment. Then, a corresponding third channel is obtained based on the different positions of the first and second channels in the chromaticity coordinates. In this way, the triangle formed by the first, second, and third channels in the chromaticity coordinates can cover most or even all of the generalized color temperature trajectory adjustment segment. This allows the chromaticity coordinates of the light emitted by the artificial light source formed by the first, second, and third channels to be any point on the generalized color temperature trajectory adjustment segment covered by the triangle. Therefore, this artificial light source can better adjust and control color temperature, brightness, and power, and has a certain magenta-green adjustment capability. It also has high color rendering and low color difference, and a wide and natural continuous color temperature adjustment capability, effectively solving the technical problems of uneven white light spectrum, poor color rendering, and large color difference in existing artificial light sources.

[0092] Please refer to Figure 10 , Figure 10 This is a flowchart of a second specific embodiment of the artificial light source design method for multi-channel, multi-dimensional pseudo-natural spectra of the present invention. The artificial light source design method of this embodiment includes the following steps:

[0093] Step S1001: Obtain the adjustment range of the pseudo-natural spectrum;

[0094] Step S1002: Based on the adjustment range, set a generalized color temperature trajectory adjustment segment under chromaticity coordinates, at least two first channels located at one end of the generalized color temperature trajectory adjustment segment, and a second channel located at the other end of the generalized color temperature trajectory adjustment segment;

[0095] Step S1003: Obtain the first channel point of each first channel in chromaticity coordinates, and set the composite first channel based on at least two first channel points;

[0096] Step S1004: Based on the synthesis of the first and second channels, a third channel is set on the convex side of the generalized color temperature trajectory;

[0097] Step S1005: Use each of the first channel, the second channel and the third channel to form an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0098] The specific process of each step in this embodiment is described in detail below.

[0099] Step S1001 in this embodiment is the same as step S201 above. Please refer to the detailed description of step S201 above for details.

[0100] In step S1002, the adjustment range is set as a generalized color temperature trajectory adjustment segment in chromaticity coordinates, and at least two first channels (cool white light source) are set at one end of the generalized color temperature trajectory adjustment segment (such as the high color temperature end), and a second channel (warm white light source) is set at the other end of the generalized color temperature trajectory adjustment segment (such as the low color temperature end).

[0101] Since chromaticity coordinates represent color, different chromaticity coordinates will necessarily result in different spectra for the light channels; however, even with the same chromaticity coordinates, the light channels can still have different spectra. Therefore, in this embodiment, first channels with different spectra can be used to form artificial light sources with the same chromaticity coordinates, thereby enabling the artificial light source to have different color rendering properties and physiological effects.

[0102] In step S1003, the system obtains the first channel points of all the first channels set in step S1002 in chromaticity coordinates, and sets the composite first channel based on all the first channel points.

[0103] The specific steps for setting up the first channel of the synthesis can be as follows:

[0104] If two first channels are set at one end of the generalized color temperature trajectory adjustment segment, then a composite first channel can be set on the line segment formed by the corresponding first channel points of the two first channels, specifically as follows: Figure 11a As shown, the first channel A111 can be set on the line segment formed by the first channel points of the first channel A1111 and A1112.

[0105] If multiple first channels are set at one end of the generalized color temperature trajectory adjustment segment, a circle with the smallest area can be set in the chromaticity coordinate system. This circle can cover the first channel points corresponding to all the first channels. The center of this circle can then be set as the first channel. Please refer to [reference needed] for details. Figure 12 The first synthetic channel A121 can be set on the circle formed by the first channel points A1211, A1212 and A1213.

[0106] In step S1004, after setting the second channel and synthesizing the first channel, a third channel can be set on the convex side of the generalized color temperature trajectory adjustment segment based on the synthesized first channel and the second channel. The specific setting method is the same as the expanded content of step S204 in the first specific embodiment of the above-mentioned artificial light source design method. In this way, the first channel point of the first channel in chromaticity coordinates, the second channel point of the second channel in chromaticity coordinates, and the third channel point of the third channel in chromaticity coordinates can form a triangle containing most of the generalized color temperature trajectory adjustment segment.

[0107] In step S1005, each of the first channel, the second channel, and the third channel is used to form an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0108] like Figure 11a As shown, a quadrilateral region is formed by the first channel point of the first channel A1111, the first channel point of the first channel A1112, the second channel point of the second channel A112, and the third channel point of the third channel A113. This quadrilateral region may include the generalized color temperature trajectory adjustment segment covered by the aforementioned triangle.

[0109] Therefore, the system can construct a corresponding artificial light source using the first channel A1111, the first channel A1112, the second channel A112, and the third channel A113 based on the color temperature of the artificial white light source provided by the user. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory adjustment segment covered by the quadrilateral area.

[0110] Furthermore, such as Figure 12 As shown, a polygonal region can be formed by the first channel point of the first channel A1211, the first channel point of the first channel A1212, the first channel point of the first channel A1213, the second channel point of the second channel A122, and the third channel point of the third channel A123. This polygonal region may include the generalized color temperature trajectory adjustment segment covered by the triangle mentioned above.

[0111] Therefore, the system can construct a corresponding artificial light source using the first channel A1211, the first channel A1212, the first channel A1213, the second channel A122, and the third channel A123 based on the color temperature of the artificial white light source provided by the user. The chromaticity coordinates of the light emitted by the artificial light source can be any point in the generalized color temperature trajectory adjustment segment covered by the polygonal region.

[0112] Furthermore, Figure 11aThe first triangle B111 is formed by the first channel point of the first channel A1111, the second channel point of the second channel A112, and the third channel point of the third channel A113. The second triangle B112 is formed by the first channel point of the first channel A1112, the second channel point of the second channel A112, and the third channel point of the third channel A113. The first triangle B111 and the second triangle B112 cover the same generalized color temperature trajectory adjustment segment. Therefore, in this embodiment, at least one first channel, second channel, and third channel are used to construct an artificial light source. The chromaticity coordinates of the light emitted by this artificial light source can be any point within the generalized color temperature trajectory adjustment segment covered by the corresponding triangular region. This allows the construction of different artificial light sources with the same chromaticity coordinates but different color rendering properties to achieve different physiological effects. A specific schematic diagram of the four-channel light mixing configuration is shown below. Figure 11b and 11c As shown.

[0113] For example, the light from channel A1112 has a higher proportion of blue light with a wavelength of around 450nm, while the light from channel A1111 has a higher proportion of cyan-blue light with a wavelength of around 490nm. These two types of blue and cyan light have different physiological effects on the human body. For instance, cyan-blue light around 490nm has a greater impact on the human biological clock but less damage to the retina and cornea, making it suitable for daytime use. Blue light around 450nm, on the other hand, is more damaging to the retina and cornea but less affected by the human biological clock, making it suitable for nighttime use. Since both triangles B111 and B112 include most of the same generalized color temperature trajectory adjustment segments, an artificial light source composed of channels A1111, A112, and A113 can have the same chromaticity coordinates as an artificial light source composed of channels A1112, A112, and A113, but with completely different physiological effects. For example, channel A1112 should be used to construct the artificial light source at night. A detailed spectral diagram can be found in [reference needed]. Figure 11e In the diagram, the first channel (marked in red) with a high proportion of cyan-blue light around 490nm has almost zero luminous intensity. During the day, the first channel A1111 is used to construct the corresponding artificial light source; see the detailed spectrum diagram for reference. Figure 11d In the diagram, the first channel, marked in yellow (around 450nm), has a relatively high proportion of blue light, and its luminous intensity is almost zero. However, the chromaticity coordinates of the artificial light sources in both cases are basically the same (e.g., Figure 11b (As shown).

[0114] Of course, users can also adjust the proportion of the first channel A1112 and the first channel A1111 in the artificial light source as needed.

[0115] Furthermore, if three or more first channels are provided, the artificial light source in this embodiment can be adjusted more precisely without affecting the chromaticity coordinates. Not only can the color and spectral parameters of all channels be adjusted, but some first channels can also be completely shut down. Similarly, this solution can also set up multiple second channels using the above method.

[0116] Please refer to Figure 13 , Figure 13 This is a flowchart of a third specific embodiment of the multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of the present invention. The artificial light source design method of this embodiment includes the following steps:

[0117] Step S1301: Obtain the adjustment range of the pseudo-natural spectrum;

[0118] Step S1302: Based on the adjustment range, set a generalized color temperature trajectory adjustment segment under chromaticity coordinates, at least two first channels located at one end of the generalized color temperature trajectory adjustment segment, and at least two second channels located at the other end of the generalized color temperature trajectory adjustment segment;

[0119] Step S1303: Obtain the first channel point of each first channel in chromaticity coordinates, and set the composite first channel based on at least two first channel points;

[0120] Step S1304: Obtain the second channel point of each second channel in chromaticity coordinates, and set the composite second channel based on at least two second channel points;

[0121] Step S1305: Based on the synthesis of the first channel and the synthesis of the second channel, a third channel is set on the convex side of the generalized color temperature trajectory;

[0122] Step S1306: Use each first channel, each second channel, and the third channel to form an artificial light source, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

[0123] The multi-channel, multi-dimensional pseudo-natural spectrum artificial light source design method of this embodiment can set multiple first channels and / or multiple second channels. This allows different first channels and / or multiple second channels to be used to construct the same pseudo-natural spectrum artificial light source, meeting users' needs for artificial light sources in different environments. The specific adjustment method is the same as or similar to that described in the second specific embodiment above; please refer to the relevant description in the second specific embodiment above for details.

[0124] The present invention provides a multi-channel, multi-dimensional simulated natural spectrum artificial light source design method. By setting a third channel on the convex side of the corresponding generalized color temperature trajectory adjustment segment, the triangle formed by the first, second, and third channel points in the chromaticity coordinates can basically cover the entire generalized color temperature trajectory adjustment segment. Thus, by using the first, second, and third channels, a wide range of natural and continuous color temperature adjustment can be achieved within the generalized color temperature trajectory adjustment segment. Furthermore, the resulting mixed white light does not have unnatural green or red hues and has high color rendering and low color difference. This effectively solves the technical problems of uneven white light spectrum, poor color rendering, and large color difference in existing artificial light sources.

[0125] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum, characterized in that, include: Obtain the adjustment range of the pseudo-natural spectrum; Based on the adjustment range, a generalized color temperature trajectory adjustment segment under chromaticity coordinates is set, along with a first channel located at one end of the generalized color temperature trajectory adjustment segment and a second channel located at the other end of the generalized color temperature trajectory adjustment segment; Based on the position of the first channel's first channel point in the chromaticity coordinate system, the position of the second channel's second channel point in the chromaticity coordinate system, and the positional relationships of the first and second channels with the generalized color temperature trajectory adjustment segment, a third channel is provided on the convex side of the generalized color temperature trajectory adjustment segment; wherein the positional relationships of the first and second channels with the generalized color temperature trajectory adjustment segment include: the first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the convex side of the generalized color temperature trajectory adjustment segment; or the first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the concave side of the generalized color temperature trajectory adjustment segment; or the first channel being located on the concave side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the concave side of the generalized color temperature trajectory adjustment segment. An artificial light source is constructed using the first channel, the second channel, and the third channel. The first channel's first point in chromaticity coordinates, the second channel's second point in chromaticity coordinates, and the third channel's third point in chromaticity coordinates form a triangle containing most of the generalized color temperature trajectory adjustment segment. By adjusting the power ratio of the first, second, and third channels in the artificial light source, the artificial light source can become a pseudo-natural light source corresponding to any point in the generalized color temperature trajectory adjustment segment of the triangle.

2. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 1, characterized in that, If the first channel is located on the convex side of the generalized color temperature trajectory adjustment segment, the second channel is located on the convex side of the generalized color temperature trajectory adjustment segment; The step of setting a third channel on the convex side of the generalized color temperature trajectory adjustment segment based on the first channel and the second channel includes: The first positive tangent is obtained based on the first channel point in the chromaticity coordinates and the generalized color temperature trajectory adjustment segment; The second positive tangent is obtained based on the second channel point in the chromaticity coordinates and the generalized color temperature trajectory adjustment segment; The third channel is set based on the chromaticity coordinates of the intersection of the first and second positive tangents.

3. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 2, characterized in that, If the triangle formed by the first channel point, the second channel point, and the third channel point in the chromaticity coordinates does not cover at least a portion of the generalized color temperature trajectory adjustment segment, a first channel mirror point of the first channel point relative to the generalized color temperature trajectory adjustment segment is set, and the third channel point is updated to the first channel mirror point; or a second channel mirror point of the second channel point relative to the generalized color temperature trajectory adjustment segment is set, and the third channel point is updated to the second channel mirror point.

4. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 1, characterized in that, If the first channel is located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel is located on the concave side of the generalized color temperature trajectory adjustment segment; The step of setting a third channel on the convex side of the generalized color temperature trajectory adjustment segment based on the first channel and the second channel includes: The first positive tangent is obtained based on the first channel point in the chromaticity coordinates and the generalized color temperature trajectory adjustment segment; Set the second channel point in the chromaticity coordinates to the second channel projection point relative to the generalized color temperature trajectory adjustment segment; The second reverse tangent is obtained based on the projection point of the second channel and the generalized color temperature trajectory adjustment segment; The third channel is set based on the chromaticity coordinates of the intersection of the first forward tangent and the second reverse tangent.

5. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 4, characterized in that, The step of setting the second channel point in the chromaticity coordinates relative to the second channel projection point of the generalized color temperature trajectory adjustment segment includes: Obtain the second channel projection point of the second channel point on the generalized color temperature trajectory adjustment segment; Obtain the second channel mirror point relative to the generalized color temperature trajectory adjustment segment; The second channel projection point is set on the line segment formed by the second channel projection point and the second channel mirror point.

6. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 4, characterized in that, If the first positive tangent and the second negative tangent do not intersect; set the first channel point as a first channel mirror point relative to the generalized color temperature trajectory adjustment segment, and update the third channel point to the first channel mirror point; or set the second channel point as a second channel mirror point relative to the generalized color temperature trajectory adjustment segment, and update the third channel point to the second channel mirror point.

7. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 1, characterized in that, If the first channel is located on the concave side of the generalized color temperature trajectory adjustment segment, the second channel is located on the concave side of the generalized color temperature trajectory adjustment segment; The step of setting a third channel on the convex side of the generalized color temperature trajectory adjustment segment based on the first channel and the second channel includes: Set the first channel point in the chromaticity coordinates relative to the first channel projection point of the generalized color temperature trajectory adjustment segment; The first reverse tangent is obtained based on the first channel projection point and the generalized color temperature trajectory adjustment segment; Set the second channel point in the chromaticity coordinates to the second channel projection point relative to the generalized color temperature trajectory adjustment segment; The second reverse tangent is obtained based on the projection point of the second channel and the generalized color temperature trajectory adjustment segment; The third channel is set based on the chromaticity coordinates of the intersection of the first reverse tangent and the second reverse tangent.

8. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 7, characterized in that, The step of setting the second channel point in the chromaticity coordinates relative to the second channel projection point of the generalized color temperature trajectory adjustment segment includes: Obtain the second channel projection point of the second channel point on the generalized color temperature trajectory adjustment segment; Obtain the second channel mirror point relative to the generalized color temperature trajectory adjustment segment; The second channel projection point is set on the line segment formed by the second channel projection point and the second channel mirror point; The step of setting the first channel's first channel point in the chromaticity coordinates relative to the first channel projection point of the generalized color temperature trajectory adjustment segment includes: Obtain the first channel projection point of the first channel point on the generalized color temperature trajectory adjustment segment; Obtain the first channel mirror point of the first channel point relative to the generalized color temperature trajectory adjustment segment; The first channel projection point is set on the line segment formed by the first channel projection point and the first channel mirror point.

9. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 1, characterized in that, The first channel, the second channel, and the third channel are all broadband light channels, white light channels, or near-white light channels.

10. A method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum, characterized in that, include: Obtain the adjustment range of the pseudo-natural spectrum; Based on the adjustment range, a generalized color temperature trajectory adjustment segment in chromaticity coordinates is set, along with at least two first channels located at one end of the generalized color temperature trajectory adjustment segment and a second channel located at the other end of the generalized color temperature trajectory adjustment segment; Obtain the first channel point of each first channel in the chromaticity coordinates, and set the synthesized first channel based on at least two first channel points; Based on the position of the synthesized first channel point in the chromaticity coordinate system, the position of the second channel point in the chromaticity coordinate system, and the positional relationship between the synthesized first channel and the second channel and the generalized color temperature trajectory adjustment segment, a third channel is provided on the convex side of the generalized color temperature trajectory adjustment segment; wherein the positional relationship between the synthesized first channel and the second channel and the generalized color temperature trajectory adjustment segment includes: the synthesized first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the convex side of the generalized color temperature trajectory adjustment segment; or the synthesized first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the concave side of the generalized color temperature trajectory adjustment segment; or the synthesized first channel being located on the concave side of the generalized color temperature trajectory adjustment segment, and the second channel being located on the concave side of the generalized color temperature trajectory adjustment segment. An artificial light source is constructed using each of the first channel, the second channel, and the third channel, wherein the first channel point in chromaticity coordinates, the second channel point in chromaticity coordinates, and the third channel point in chromaticity coordinates form a triangle containing most of the generalized color temperature trajectory adjustment segment; by adjusting the power ratio of the first channel, the second channel, and the third channel in the artificial light source, the artificial light source can become a pseudo-natural light source corresponding to any point in the generalized color temperature trajectory adjustment segment of the triangle.

11. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 10, characterized in that, If one end of the generalized color temperature trajectory adjustment segment is provided with two first channels, then the synthetic first channel is set on the line segment formed by the first channel points corresponding to the two first channels.

12. The method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum according to claim 10, characterized in that, An artificial light source is constructed using at least one of the first channel, the second channel, and the third channel, wherein the chromaticity coordinates of the light emitted by the artificial light source are located on the generalized color temperature trajectory adjustment segment.

13. A method for designing an artificial light source with a multi-channel, multi-dimensional pseudo-natural spectrum, characterized in that, include: Obtain the adjustment range of the pseudo-natural spectrum; Based on the adjustment range, a generalized color temperature trajectory adjustment segment under chromaticity coordinates is set, along with at least two first channels located at one end of the generalized color temperature trajectory adjustment segment and at least two second channels located at the other end of the generalized color temperature trajectory adjustment segment; Obtain the first channel point of each first channel in the chromaticity coordinates, and set the synthesized first channel based on at least two first channel points; Obtain the second channel point of each second channel in the chromaticity coordinates, and set the synthesized second channel based on at least two second channel points; Based on the positions of the synthesized first channel and the synthesized second channel in the chromaticity coordinate system, and the positional relationships between the synthesized first channel and the synthesized second channel and the generalized color temperature trajectory adjustment segment, a third channel is provided on the convex side of the generalized color temperature trajectory adjustment segment; wherein the positional relationships between the synthesized first channel and the synthesized second channel and the generalized color temperature trajectory adjustment segment include: the synthesized first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the synthesized second channel being located on the convex side of the generalized color temperature trajectory adjustment segment; or the synthesized first channel being located on the convex side of the generalized color temperature trajectory adjustment segment, and the synthesized second channel being located on the concave side of the generalized color temperature trajectory adjustment segment; or the synthesized first channel being located on the concave side of the generalized color temperature trajectory adjustment segment, and the synthesized second channel being located on the concave side of the generalized color temperature trajectory adjustment segment. An artificial light source is constructed using each of the first channel, each of the second channel, and the third channel, wherein the first channel point in chromaticity coordinates, the second channel point in chromaticity coordinates, and the third channel point in chromaticity coordinates form a triangle containing most of the generalized color temperature trajectory adjustment segment; by adjusting the power ratio of the first, second, and third channels in the artificial light source, the artificial light source can become a pseudo-natural light source corresponding to any point in the generalized color temperature trajectory adjustment segment of the triangle.

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