Light source modules, lighting systems and luminaires

Abstract

This application provides a light source module, a lighting system, and a lamp. The light source module includes five electrically independent light-emitting units: a first blue light-emitting unit that emits blue light with a peak wavelength of 430-445nm; a second blue light-emitting unit that emits blue light with a peak wavelength of 455-470nm; a blue-green light-emitting unit that emits blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm; a yellow light-emitting unit that emits yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm; and a red light-emitting unit that emits red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm. Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emission of the light source module. The light source module uses two blue light emitting units to emit two different types of blue light. The resulting light mixture has a smoother spectral distribution and is closer to natural light, resulting in higher light quality. Based on the individual control of the blue and green light emitting units, combined with other light emitting units, rhythmic adjustment can be achieved.

Description

Technical Field

[0001] This application relates to a light source module, a lighting system, and a luminaire. Background Technology

[0002] Among various light sources, light-emitting diodes (LEDs) are widely used in various lighting devices, such as indoor and outdoor lighting, smart lighting, plant lighting, automotive lighting, and indoor and outdoor display lighting, due to their low power consumption and high luminous efficiency.

[0003] Currently, the most common method for dimming and color mixing is to use the three primary colors of red, green, and blue. The light-emitting diodes (LEDs) used in this three-primary-color mixing method are primarily single-wavelength LED chips. In this case, due to the narrow full-width at half maximum (FWHM) of various monochromatic colors, a sufficient color rendering index cannot be guaranteed when achieving white light, resulting in limited light quality from the mixed light. However, as people's living standards improve, their lighting needs become more diversified, making the improvement of light quality from the mixed light a pressing issue. Utility Model Content

[0004] This application provides a light source module, a lighting system, and a luminaire to improve the light quality of mixed light.

[0005] In a first aspect, embodiments of this application provide a light source module, comprising five electrically independent light-emitting units, namely:

[0006] The first blue light-emitting unit emits blue light with a peak wavelength of 430-445nm;

[0007] The second blue light-emitting unit emits blue light with a peak wavelength of 455-470nm;

[0008] The blue-green light-emitting unit emits blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm.

[0009] The yellow light-emitting unit emits yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm;

[0010] The red light-emitting unit emits red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm;

[0011] Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emission of the light source module.

[0012] Secondly, embodiments of this application provide a lighting system, including: a light source and a driving circuit;

[0013] The light source includes at least one light source module as described in the first aspect above;

[0014] The driving circuit is connected to each light-emitting unit and supplies power to them respectively, and the driving circuit controls the current / voltage supplied to each light-emitting unit respectively.

[0015] Thirdly, embodiments of this application provide a lighting fixture, including: a light source module as described in the first aspect above, or a lighting system as described in the second aspect above.

[0016] In this embodiment, the light source module includes five electrically independent light-emitting units: a first blue light-emitting unit emitting blue light with a peak wavelength of 430-445nm; a second blue light-emitting unit emitting blue light with a peak wavelength of 455-470nm; a blue-green light-emitting unit emitting blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm; a yellow light-emitting unit emitting yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm; and a red light-emitting unit emitting red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm. Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emission of the light source module.

[0017] The light source module uses two blue light emission units to emit two different types of blue light, which can distribute the blue light energy. The spectrum distribution after mixing is smoother and closer to the spectrum of natural light. The mixed light is closer to natural light and has higher light quality. It can be applied to various scenarios such as low color temperature and high color temperature, and can provide high-quality mixed light in different scenarios.

[0018] Furthermore, based on the blue-green light-emitting unit, its individual control, combined with other light-emitting units, allows for rhythmic adjustment. At the same color temperature, a high level of melatonin inhibition can be achieved without increasing the color temperature, without sacrificing the health benefits of the lighting. Additionally, a better melatonin-promoting effect can also be achieved, ensuring both spatial brightness and a comfortable, relaxing lighting environment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the structure of a light source module provided in an embodiment of this application;

[0021] Figure 2 The spectral diagrams of each light-emitting unit in the light source module provided in the embodiments of this application;

[0022] Figure 3 A color point distribution diagram of some light-emitting units in the light source module provided in the embodiments of this application on the CIE 1931 chromaticity diagram;

[0023] Figure 4 A color point distribution diagram of the light source module provided in the embodiments of this application on the CIE 1931 chromaticity diagram;

[0024] Figures 5a-5h A comparison diagram of the spectra of white light obtained by multiple light mixing of the light source module provided in the embodiments of this application and that of a standard light source;

[0025] Figure 6 The blackbody radiation spectrum provided in the embodiments of this application;

[0026] Figure 7 The spectrum of the D-series standard light source provided in the embodiments of this application;

[0027] Figure 8 A comparison chart of the color rendering index and Kmel of the light source module provided in the embodiments of this application after multiple light mixing under constant color temperature;

[0028] Figure 9 The white light spectrum obtained by the light source module provided in the embodiments of this application through multiple light mixing under constant color temperature;

[0029] Figure 10 The white light spectrum obtained by multiple light mixing operations at a color temperature of less than 4000K using the light source module provided in this embodiment of the application;

[0030] Figure 11 The white light spectrum obtained by multiple light mixing operations at a color temperature greater than 4000K using the light source module provided in this application embodiment;

[0031] Figure 12 A comparison of white light Kmel and CCT obtained by the light source module provided in the embodiments of this application under different scenarios;

[0032] Figure 13 Provided for the embodiments of this application Figure 1 A-A' cross-sectional view of the light source module shown;

[0033] Figures 14a-14d A schematic diagram of the bracket-supported packaging structure of the light source module provided in the embodiments of this application;

[0034] Figures 15a-15c This is a schematic diagram of the bracketless packaging structure of the light source module provided in the embodiments of this application;

[0035] Figure 16 This is a schematic diagram of the structure of a lighting system provided in an embodiment of this application;

[0036] Figure 17 This is a schematic diagram of another lighting system provided in an embodiment of this application;

[0037] Figure 18 This is a schematic diagram of the structure of a lamp provided in an embodiment of this application. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the protection scope of this document.

[0039] Figure 1 This is a schematic diagram of a light source module provided in an embodiment of this application. Figure 1 As shown, the light source module comprises five electrically independent light-emitting units. Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emitted by the light source module. The five light-emitting units are as follows:

[0040] The first blue light emitting unit 100 emits blue light with a peak wavelength of 430-445nm.

[0041] The second blue light emitting unit 200 emits blue light with a peak wavelength of 455-470nm.

[0042] The blue-green light emitting unit 300 emits blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm.

[0043] The yellow light emitting unit 400 emits yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm.

[0044] The red light emitting unit 500 emits red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm.

[0045] The blue light emitted by the first blue light emitting unit 100 has a spectral half-width of 17-23 nm. The blue light emitted by the second blue light emitting unit 200 has a spectral half-width of 18-25 nm.

[0046] The light source module provided in this application embodiment includes five electrically independent light-emitting units: a first blue light-emitting unit emitting blue light with a peak wavelength of 430-445nm; a second blue light-emitting unit emitting blue light with a peak wavelength of 455-470nm; a blue-green light-emitting unit emitting blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm; a yellow light-emitting unit emitting yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm; and a red light-emitting unit emitting red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm. Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emission of the light source module.

[0047] The light source module uses two blue light emission units to emit two different types of blue light, which can distribute the blue light energy. The spectrum distribution after mixing is smoother and closer to the spectrum of natural light. The mixed light is closer to natural light and has higher light quality. It can be applied to various scenarios such as low color temperature and high color temperature, and can provide high-quality mixed light in different scenarios.

[0048] Furthermore, based on the blue-green light-emitting unit, its individual control, combined with other light-emitting units, allows for rhythmic adjustment. At the same color temperature, a high level of melatonin inhibition can be achieved without increasing the color temperature, without sacrificing the health benefits of the lighting. Additionally, a better melatonin-promoting effect can also be achieved, ensuring both spatial brightness and a comfortable, relaxing lighting environment.

[0049] It should be noted that there are two blue light emitting units in the embodiments of this application. Compared with a light source module with only one blue light emitting unit, such as a four-in-one light source module containing only one blue light emitting unit, the use of two blue light emitting units to emit different blue light can distribute the blue light energy. The spectral distribution after light mixing is smoother and closer to the spectrum of natural light. In other words, the light mixing is closer to natural light and has higher light quality.

[0050] In addition, the light-emitting unit in this embodiment has 5 light-emitting units. Compared with a light source module with more light-emitting units, such as a light source module with 8 light-emitting units, the five-in-one light source module can reduce the complexity of the light source module structure and the complexity of the manufacturing process, save costs, and have strong practicality while ensuring high light quality.

[0051] Figure 2 The image shows the spectral diagrams of each light-emitting unit in the light source module provided in the embodiments of this application. Figure 2As shown, the five curves from left to right correspond to the spectra of the first blue light-emitting unit 100, the second blue light-emitting unit 200, the blue-green light-emitting unit 300, the yellow light-emitting unit 400, and the red light-emitting unit 500, respectively. Figure 2 It can be seen that the first blue light emitting unit 100 emits blue light with a peak wavelength of 430-445nm. The second blue light emitting unit 200 emits blue light with a peak wavelength of 455-470nm. The blue-green light emitting unit 300 emits blue-green light with a peak wavelength of 480-510nm. The yellow light emitting unit 400 emits yellow light with a peak wavelength of 555-580nm. The red light emitting unit 500 emits red light with a peak wavelength of 620-660nm.

[0052] In this embodiment of the application, the light source module may include at least one of the following:

[0053] 1) The light color of the blue-green light emitting unit 300 is located in the quadrilateral area enclosed by four points (0.061, 0.479), (0.088, 0.521), (0.131, 0.483), and (0.089, 0.415) on the CIE 1931 chromaticity diagram.

[0054] 2) The color of the yellow light emitting unit 400 is located in the quadrilateral region enclosed by four points (0.395, 0.521), (0.418, 0.572), (0.491, 0.501), and (0.458, 0.454) on the CIE 1931 chromaticity diagram.

[0055] 3) The color of the red light emitting unit 500 is located in the quadrilateral area enclosed by four points (0.605, 0.351), (0.638, 0.362), (0.699, 0.301), and (0.667, 0.291) on the CIE 1931 chromaticity diagram.

[0056] Figure 3 This is a color point distribution diagram on the CIE 1931 chromaticity diagram of some light-emitting units in the light source module provided in the embodiments of this application. Figure 3 The first region is a quadrilateral formed by four vertices A1 (0.061, 0.479), A2 (0.088, 0.521), A3 (0.131, 0.483), and A4 (0.089, 0.415). The light color of the blue-green light-emitting unit 300 is located within this first region.

[0057] in, Figure 3The second region is enclosed by four vertices B1 (0.395, 0.521), B2 (0.418, 0.572), B3 (0.491, 0.501), and B4 (0.458, 0.454), forming a quadrilateral. The light color of the yellow light-emitting unit 400 is located within this second region.

[0058] in, Figure 3 The third region is a quadrilateral formed by four vertices C1 (0.605, 0.351), C2 (0.638, 0.362), C3 (0.699, 0.301), and C4 (0.667, 0.291). The light color of the red light emitting unit 500 is located within this third region.

[0059] Figure 4 A color point distribution diagram of the light source module provided in the embodiments of this application on the CIE 1931 chromaticity diagram. For example... Figure 4 As shown in the diagram, within the pentagonal region formed by the five vertices A, B, C, D, and E, the light source module can perform arbitrary light mixing. This region encompasses blackbody radiation lines and can achieve white light color. Vertex A can be... Figure 3 For any point within the first region formed by A1 to A4, vertex B can be... Figure 3 For any point within the second region formed by B1 to B4, vertex C can be... Figure 3 Any point within the third region formed by C1 to C4. Figure 4 The white light obtained by mixing light within the pentagonal region has a spectral band distribution close to that of sunlight and has high light quality.

[0060] In this embodiment, each of the five light-emitting units may include an excitation LED chip and a package covering the excitation LED chip. At least one of the packages of the blue-green light-emitting unit 300, the yellow light-emitting unit 400, and the red light-emitting unit 500 may also include a phosphor, configured to convert a portion of the light emitted by the excitation LED chip into longer wavelength light when excited by the excitation LED chip.

[0061] In this embodiment, the excitation LED chip can be a short-wavelength LED chip, including but not limited to: blue LED chips or violet LED chips, etc., and is not specifically limited.

[0062] In scenarios where blue LED chips are used as excitation LED chips, the wide half-width at half-width (FWHM) of blue light ensures good spectral continuity and high light quality when multiple light-emitting units perform multi-color mixing.

[0063] In this embodiment of the application, the light source module may include at least one of the following:

[0064] 1) The phosphor in the encapsulation of the blue-green light-emitting unit 300 includes blue-green phosphor;

[0065] 2) The phosphor in the encapsulation of the yellow light-emitting unit 400 includes yellow phosphor;

[0066] 3) The phosphor in the encapsulation of the red light emitting unit 500 includes red phosphor.

[0067] In one embodiment, when the phosphor in the package of the blue-green light-emitting unit 300 includes a blue-green phosphor, the blue-green phosphor, when excited by the excited LED chip, converts part of the light emitted by the excited LED chip into blue-green light. The blue-green phosphor can be (Ba,Sr)Si2N2O2:Eu.

[0068] In one embodiment, when the phosphor in the package of the yellow light-emitting unit 400 includes yellow phosphor, the yellow phosphor, when excited by the excitation LED chip, converts part of the light emitted by the excitation LED chip into yellow light. The yellow phosphor can be one or a mixture of Y3(Al,Ga)5O12:Ce, Ga-Y3Al5O12:Ce, and (Ba,Sr,Ca,Mg)SiO4:Eu.

[0069] In one embodiment, when the phosphor in the package of the red light-emitting unit 500 includes red phosphor, the red phosphor, when excited by the excitation LED chip, converts part of the light emitted by the excitation LED chip into red light. The red phosphor can be one or more of the following: CaAlSiN3:Eu, (Ca,Sr)AlSiN3:Eu, (Ba,Sr,Ca,Mg)2Si5N8:Eu, K2SiF6:Mn4+, K2GeF6:Mn4+, and K2TiF6:Mn4+.

[0070] In this embodiment, the five light-emitting units of the aforementioned light source module are mixed to obtain white light with a color temperature range of 1800K to 12000K. This white light includes at least one of the following: a color rendering index (CRI) greater than 93 and a spectral fitting ratio (SFR) greater than 75%.

[0071] In this embodiment, the five light-emitting units of the aforementioned light source module are mixed to obtain white light with a color temperature range of 2700K to 6500K. This white light includes at least one of the following: a color rendering index (CRI) greater than 95, a spectral fit (SFR) greater than 82%, and R1 to R15 all greater than 90.

[0072] In this embodiment, the spectral fit is used to evaluate the degree of fit between the measured spectrum and the target spectrum. It is calculated using the Average Spectral Difference (ASD) value published by Bridgelux Inc., USA, to determine the spectral deviation ratio. The spectrum of the reference light source used is similar to the TM-30 standard published by the Illuminating Engineering Society of North America (IES). When the color temperature is above 5000K, the reference light source uses the spectrum emitted by a D-series standard illuminant as a reference. When the color temperature is below 4000K, the reference light source uses the spectrum emitted by a blackbody radiation source as a reference. If the color temperature is between 4000K and 5000K, the spectrum emitted by a mixed light source of a 4000K blackbody radiation source and a D50 standard illuminant is used as a reference. Furthermore, considering the band distribution of human visual response, the evaluation range of spectral deviation is limited to between 425nm and 690nm. The formula for calculating the spectral fit can be specifically as follows:

[0073]

[0074] Where SFR is the spectral fit, ASD is the average spectral deviation, and φ ref As a reference light source

[0075] Relative intensity, φ is the relative intensity of the light source to be evaluated, λ is the wavelength, and the wavelength range is 425nm~690nm.

[0076] In this embodiment, white light with different quality parameters can be obtained by adjusting the duty ratio of each light-emitting unit of the light source module, thereby achieving adjustable white light quality obtained from light mixing. The parameters shown in Table 1 are used as an example for the following explanation.

[0077] Table 1

[0078]

[0079]

[0080] Table 1 shows eight light mixing operations, corresponding to 1a to 1h. Each light mixing operation involved a different PWM ratio for each emitting unit and a different target color temperature. White light was obtained after mixing the light from each emitting unit according to the configured PWM ratio. The light quality parameters of the white light include the following: Correlated Color Temperature (CCT), Deviation from Standard White (Duv), Average Color Rendering Index (Ra), Spectral Fitting Ratio (SFR), Melanolyte efficiency ratio (Kmel), and Specific Color Rendering Indices (R1 to R15). As shown in Table 1, after light mixing, white light with a color temperature range of 1800K to 12000K can be obtained. Within this color temperature range, the CRI is greater than 93 and the SFR is greater than 75%, thus achieving high-quality light mixing and improving the mixing effect.

[0081] In this embodiment, the conventional illuminance value lux (lx) is used to measure the photosensitivity of cone cells, quantitatively describing the light that allows the human eye to see objects. However, to quantify the stimulation of melanoplasm light response by a light source, the equivalent melanopic lux (EML) method is used to evaluate the differences. EML is calculated by weighting the light response of ipRGCs (ipRGCs) to convert the spectral stimulation of the light source, thereby quantitatively describing the biological effects of light on humans. Accordingly, light with a higher EML indicates a significant effect on inhibiting melatonin secretion, thereby improving alertness, preventing drowsiness, and enhancing work efficiency. Conversely, light with a lower EML is more suitable for creating a soothing and relaxing lighting environment. Since EML cannot be directly measured, the melanoplasm photosensitive efficiency ratio (Kmel) can be used to quantify product characteristics. The trend of this ratio has the same representative significance for measuring the stimulating effect of light on melanoplasm as EML. Kmel is calculated by measuring the relative intensity of each wavelength and weighting it using a specified formula, as follows:

[0082]

[0083] Where EDI_mel(D65) is the photopic illuminance of the melanocytes at an equivalent D65 light source, Ev is the photopic illuminance, P(λ) is the spectral power distribution of the light source, V(λ) is the photopic luminous efficiency function, and Mel(λ) is the photopic photoreceptor cell (ipRGC) photosensitivity function. The above calculation formulas are based on the parameter definitions and calculation methods published in CIE S026.

[0084] Figures 5a-5hThis is a spectral comparison diagram of white light obtained by multiple light mixing by the light source module provided in this application embodiment and a standard light source. The light source module performs multiple light mixing operations according to the configuration shown in Table 1, and the results are compared with a standard light source. In this application embodiment, the standard light source includes sunlight (color temperature > 4000K) or blackbody radiation (color temperature ≤ 4000K). Figure 5a This is a comparison chart of the white light spectrum and the blackbody radiation spectrum obtained by mixing light according to Table 1 for 1a. Figure 5b This is a comparison chart of the white light spectrum and the blackbody radiation spectrum obtained by mixing light according to Table 1b. Figure 5c This is a comparison chart of the white light spectrum and the blackbody radiation spectrum obtained by 1c mixing according to Table 1. Figure 5d This is a comparison chart of the white light spectrum obtained by 1d light mixing according to Table 1 and the spectrum of the D40 standard light source. Figure 5e This is a comparison chart of the white light spectrum obtained by 1e mixing according to Table 1 and the spectrum of the D50 standard light source. Figure 5f This is a comparison chart of the white light spectrum obtained by 1f mixing according to Table 1 and the spectrum of the D57 standard light source. Figure 5g This is a comparison chart of the white light spectrum obtained by mixing 1g of light according to Table 1 and the spectrum of the D65 standard light source. Figure 5h The table below shows a comparison of the white light spectrum obtained after 1 hour of light mixing according to Table 1 with the spectrum of the D-series standard light source. Based on the above comparison charts of the spectra with the standard light source, it can be seen that the light source module provided in this application embodiment can obtain different light mixing results. Not only does its spectral band distribution closely resemble the sunlight spectrum, but it also exhibits better light quality in white light presentation. Furthermore, it is applicable to various scenarios, including low and high color temperatures, and can provide high-quality light mixing in different scenarios.

[0085] In this embodiment of the application, the standard light source spectrum includes two types: such as Figure 6 As shown, when the color temperature is less than 4000K, the blackbody radiation spectrum is used as the target spectrum. Figure 7 As shown, when the color temperature is greater than or equal to 4000K, the relative spectral distribution of the D-series standard light source specified by the International Commission on Illumination (CIE) is used as the target spectrum, such as D50, D65, etc.

[0086] The blackbody radiation spectrum conforms to the following formula at different color temperatures (T) and blackbody radiation spectra (Sr):

[0087]

[0088] In the above formula, S r Here, λ is the blackbody radiation spectrum, λ is the radiation wavelength, T is the relative color temperature, h is Planck's constant, c is the speed of light (3 x 10⁸ m / s), and K is Boltzmann's constant. b is the absolute temperature of the blackbody.

[0089] The calculation process for the standard light source spectrum can be as follows: First, obtain the chromaticity coordinates (x, y, x) of the D-series standard light source corresponding to the target color temperature. D y D ), and then according to the color coordinates (x D y D Calculate the relative spectrum Sr(λ) of the D-series standard light source.

[0090] Where, coordinate x D The calculation formula is as follows:

[0091] 1) If T≤7000K,

[0092]

[0093] 2) If T > 7000K,

[0094]

[0095] In the two formulas above, K represents the unit of T (Kelvin).

[0096] Where, coordinate y D The calculation formula is as follows:

[0097]

[0098] The formula for calculating the relative spectrum Sr(λ) of the D-series standard light source is as follows:

[0099] S r (λ)=S0(λ)+M1S1(λ)+M2S2(λ);

[0100]

[0101] Where S0(λ) is the average spectral power distribution of a typical solar wavelength λ, and S1(λ) and S2(λ) are two specific (most important) eigenvectors in the set of all solar distributions. All of these are basis functions with a spacing of 5 nm wavelength.

[0102] In this application embodiment, the embodiments shown in Table 1 above provide a solution for providing high-quality light mixing. To achieve rhythmic lighting, this application embodiment can also achieve this by adjusting the color temperature in the spectral dimension. However, while increasing the color temperature achieves a better rhythmic stimulation effect, the overall blue light radiation energy increases, which may reduce the overall health of the lighting space. Conversely, while lowering the color temperature achieves a more comfortable lighting effect, the overall brightness decreases significantly, which is detrimental to the overall brightness of the space. Therefore, this application embodiment also provides a solution for achieving rhythmic adjustability. A blue-green light-emitting unit is set within the light source module. By individually controlling this unit and combining it with other light-emitting units, the advantage of rhythmic adjustability can be achieved. At the same color temperature (e.g., 4000K), a high inhibitory effect on melatonin can be achieved without increasing the color temperature, without sacrificing the health of the lighting. Furthermore, a better promoting effect on melatonin can also be achieved, ensuring both spatial brightness and a comfortable and relaxing lighting space. The rhythmic adjustability solution will be described in detail below.

[0103] In this embodiment, the five light-emitting units of the aforementioned light source module are mixed to obtain white light with a color temperature of 4000K, a color rendering index (CRI) greater than 85, and a black-pixel light sensitivity ratio (Kmel) of 0.61–0.82. In this scenario, the color temperature remains constant, while Kmel is adjustable. Moreover, the variation range of Kmel can reach ±13% of its median value, thus enabling the created lighting environment to be adjustable to physiological rhythms.

[0104] In this embodiment, the five light-emitting units of the aforementioned light source module are mixed to obtain white light with a color temperature of 4000K, a color rendering index (CRI) greater than 80, and a black-pixel light sensitivity ratio (Kmel) of 0.58–0.85. In this scenario, the color temperature remains constant, while Kmel is adjustable, and its variation range can reach ±19% of its median value. It can be seen that although the CRI decreases slightly, the adjustable range of Kmel is improved, enabling the created lighting environment to be adjusted to physiological rhythms within a wider range.

[0105] In the scenario described above where the color temperature remains constant, white light with different quality parameters can be obtained by adjusting the duty cycle of each light-emitting unit in the light source module, and the Kmel of the light mixing can be adjusted. The parameters shown in Table 2 are used as an example for the following explanation.

[0106] Table 2

[0107]

[0108] Table 2 shows seven light mixing experiments conducted with a target color temperature of 4000K, corresponding to experiments 2a to 2g. The PWM ratio for each light-emitting unit in the light source module differed in each mixing experiment. After mixing the light from each light-emitting unit according to the configured PWM ratio, white light was obtained. The light quality parameters of the white light include the following: relative color temperature (CCT), color deviation (Duv), average color rendering index (CRI) (Ra), and black pixel luminous efficiency ratio (Kmel). As shown in Table 2, after mixing the light from each light-emitting unit, white light with a color temperature of 4000K was obtained, with a CRI greater than 80 and a Kmel ranging from 0.58 to 0.85. Therefore, with a constant color temperature, Kmel is adjustable, enabling the created lighting environment to be adjusted to physiological rhythms.

[0109] Figure 8 A comparison chart of the color rendering index and Kmel of the light source module provided in this application embodiment under constant color temperature after multiple light mixing operations. The light source module, configured as shown in Table 2, performs multiple light mixing operations at a target color temperature of 4000K, including steps 2a to 2g. Figure 8 As shown, in multiple light mixing processes, the CRI (Ra) of the 2d mixing was the highest at 98.2, while the CRI (Ra) of the 2g mixing was the lowest at 81.2, but both still maintained a CRI (Ra) above 80. In the multiple light mixing processes, the Kmel of the 2a mixing was the lowest at 0.58, and the Kmel of the 2g mixing was the highest at 0.85, resulting in a Kmel range of 0.58–0.85. Therefore, it can be seen that with a constant color temperature, the CRI (Ra) is consistently greater than 80, and the Kmel is adjustable. This demonstrates that while ensuring high light quality, the created lighting environment is adjustable to physiological rhythms.

[0110] Figure 9 The image shows a white light spectrum obtained by multiple light mixing operations using the light source module provided in this embodiment, with the color temperature remaining constant. The light source module, configured as shown in Table 2, performs multiple light mixing operations at a target color temperature of 4000K, including steps 2a to 2g. Figure 9 As shown, the white light spectra obtained by multiple light mixing processes (2a-2g) are quite similar and close to those of a standard light source. This ensures high quality of mixed light while creating an adjustable lighting environment that aligns with physiological rhythms.

[0111] In this embodiment, the five light-emitting units of the aforementioned light source module are mixed to obtain white light with a color temperature range of 2700K to 6500K. Within this color temperature range, the color rendering index (CRI) is greater than 85, and the black-pixel light sensitivity ratio (Kmel) is 0.35 to 1.09. In this scenario, both the color temperature and Kmel are adjustable, achieving both variable color temperature and adjustable lighting environment to physiological rhythms. If the CRI is reduced to an even lower level (e.g., 80), the range of Kmel variation can be even greater, resulting in a more focused and efficient lighting environment that regulates physiological rhythms, leading to greater relaxation.

[0112] In this embodiment, white light with different quality parameters can be obtained by adjusting the duty cycle of each light-emitting unit in the light source module, thereby achieving adjustable white light quality obtained from light mixing. When the target color temperature is less than 4000K, lowering Kmel can achieve a melatonin-promoting effect, resulting in a warmer white light spectrum that promotes relaxation and is suitable for scenarios such as sleep or rest. When the target color temperature is greater than 4000K, increasing Kmel can achieve a melatonin-inhibiting effect, resulting in a cooler white light spectrum that promotes concentration and is suitable for scenarios such as computer work or reading / writing. The parameters shown in Tables 3 and 4 are used as examples for the following explanation.

[0113] Table 3

[0114]

[0115]

[0116] Table 3 shows three light mixing operations, corresponding to 3a to 3c, with target color temperatures of 2700K, 3000K, and 3500K, all less than 4000K. The PWM ratio for each emitting unit differed in each light mixing operation. White light was obtained after mixing the light from each emitting unit according to the configured PWM ratio. The light quality parameters of the white light include the following: relative color temperature (CCT), color deviation (Duv), average color rendering index (CRI) (Ra), and black-pixel light sensitivity ratio (Kmel). As shown in Table 3, the white light color temperature after multiple light mixing operations for each emitting unit is less than 4000K, and the CRI (Ra) is greater than 85. Specifically, the Kmel values ​​for the white light after light mixing operations 3a to 3c are 0.35, 0.42, and 0.52, respectively. Referring to Table 1, the Kmel values ​​of the white light after mixing 1b (target color temperature 2700K), 1c (target color temperature 3000K), and 1d (target color temperature 4000K) are 0.45, 0.53, and 0.71, respectively. It can be seen that when the target color temperature is less than 4000K, the Kmel value of the mixed light in Table 3 is lower than that in Table 1, which can achieve a melatonin-promoting effect. The resulting white light spectrum is warmer, which can make people more relaxed and is suitable for scenarios such as sleep or rest.

[0117] Figure 10 The white light spectrum obtained by the light source module provided in this embodiment of the application through multiple light mixing at a color temperature less than 4000K. The light source module performs multiple light mixing operations according to the configuration shown in Table 3 at a target color temperature less than 4000K, including 3a to 3c. Figure 10 As shown, the white light spectra 3a to 3c obtained by multiple light mixing in low color temperature scenes are quite similar and are close to the blackbody radiation spectrum. This not only enables the created lighting environment to be adjustable to physiological rhythms and achieve the effect of promoting melatonin, but also ensures high quality of mixed light.

[0118] Table 4

[0119]

[0120]

[0121] Table 4 shows three light mixing operations, corresponding to 3d through 3f, with target color temperatures of 5000K, 5700K, and 6500K, all greater than 4000K. The PWM ratio for each emitting unit differed in each light mixing operation. White light was obtained after mixing the light from each emitting unit according to the configured PWM ratio. The light quality parameters of the white light include the following: relative color temperature (CCT), color deviation (Duv), average color rendering index (CRI) (Ra), and black pixel light sensitivity ratio (Kmel). As shown in Table 4, the white light color temperature after multiple light mixing operations for each emitting unit is greater than 4000K, and the CRI (Ra) is greater than 85. Specifically, the Kmel values ​​for the white light after light mixing in 3d through 3f are 0.97, 1.04, and 1.09, respectively. Referring to Table 1, the Kmel values ​​of the white light after mixing 1e (target color temperature 5000K), 1f (target color temperature 5700K), and 1g (target color temperature 6500K) are 0.87, 0.95, and 1.02, respectively. It can be seen that when the target color temperature is greater than 4000K, the Kmel value of the mixed light in Table 4 is higher than that in Table 1, which can achieve the effect of inhibiting melatonin. The resulting white light spectrum is cooler, which can help people concentrate better and is suitable for computer work or reading / writing scenarios.

[0122] Figure 11 The image shows a white light spectrum obtained by multiple light mixing operations at a color temperature greater than 4000K using the light source module provided in this embodiment. The light source module performs multiple light mixing operations, including 3d to 3f, at a target color temperature greater than 4000K, according to the configuration shown in Table 4. Figure 11 As shown, the white light 3d to 3f spectra obtained by multiple light mixing in high color temperature scenes are quite similar and are close to the spectrum of D-series standard light sources. This not only enables the created lighting environment to be adjustable to physiological rhythms and achieve the effect of inhibiting melatonin, but also ensures high quality of mixed light.

[0123] Figure 12 Comparison of Kmel and CCT of white light obtained by the light source module provided in this application embodiment under different scenarios. The light source module performed multiple light mixing operations under different scenarios, involving a color temperature range of 2700K to 6500K, with a color rendering index greater than 85 in all cases, specifically including Examples 1 to 3. Example 1 refers to multiple light mixing operations 1b to 1g according to the configuration shown in Table 1, resulting in a white light Kmel of 0.45 to 1.02. Example 2 refers to multiple light mixing operations 2b to 2f according to the configuration shown in Table 2 with a constant color temperature of 4000K, resulting in a white light Kmel of 0.61 to 0.82. Example 3 includes two stages: the first stage refers to multiple light mixing operations 3a to 3c according to Table 3 with a color temperature less than 4000K, and the second stage refers to multiple light mixing operations 3d to 3f according to Table 4 with a color temperature greater than 4000K, resulting in an overall white light Kmel of 0.35-1.09. Comparing the above data, it can be seen that the Kmel adjustment range of Example 3 is 1.3 times that of Example 1, thus improving the efficiency of rhythm regulation.

[0124] In this embodiment, the light source module can be a packaged chip, comprising a main body with five receiving slots equal in number to the five light-emitting units. Each of the five light-emitting units may include an excitation LED chip and a package covering the excitation LED chip. The excitation LED chips are respectively disposed in the receiving slots and each has a pair of pins, with the pins electrically isolated from each other.

[0125] In the first blue light emitting unit 100 and the second blue light emitting unit 200, the package directly fills the receiving groove and covers the excitation LED chip. In the blue-green light emitting unit 300, the yellow light emitting unit 400, and the red light emitting unit 500, the package and phosphor are mixed and then filled into the receiving groove and cover the excitation LED chip.

[0126] The packaging form of the aforementioned packaged chip can be PLCC surface mount package, ceramic surface mount package, CSP package, multi-in-one single surface mount package, or COB chip integrated package, and is not specifically limited. The main body 600 can be a non-metallic bracket, such as a plastic bracket, and the material of the plastic bracket can be any one of PPA, PCT, and EMC, and is not specifically limited. The excitation LED chip includes upright or flip-chip, single LED chip or multiple LED chips, and is connected together in series, parallel, or series-parallel configurations, and is not specifically limited. The excitation LED chip can be a short-wavelength LED chip, including but not limited to: blue LED chips or violet LED chips, and is not specifically limited.

[0127] Figure 13Provided for the embodiments of this application Figure 1 The image shows a cross-sectional view of the light source module along line A-A'. (Combined with...) Figure 13 The internal structure of the light source module is described in detail below. The main body 600 is equipped with a first blue light emitting unit 100, a second blue light emitting unit 200, a blue-green light emitting unit 300, a yellow light emitting unit 400, and a red light emitting unit 500. The main body 600 also contains five receiving slots 10, 20, 30, 40, and 50.

[0128] The first blue light-emitting unit 100 is located in the leftmost receiving groove 10 and includes an excitation LED chip 101 and a package 102. The excitation LED chip 101 has a pair of pins 11a and 11b, and the package 102 fills the receiving groove 10 and covers the excitation LED chip 101. The package 102 can be a transparent sealant.

[0129] The second blue light-emitting unit 200 is located within the receiving groove 20 and includes an excitation LED chip 201 and a package 202. The excitation LED chip has a pair of pins 22a and 22b, and the package 202 fills the receiving groove 20 and covers the excitation LED chip 201. The package 202 can be a transparent sealant.

[0130] The blue-green light-emitting unit 300 is located within the receiving groove 30 and includes an excitation LED chip 301 for exciting phosphors and a package 302. The package 302 contains phosphors 303, and the mixture fills the receiving groove 30 and covers the excitation LED chip 301. The excitation LED chip 301 has a pair of pins 33a and 33b.

[0131] The yellow light-emitting unit 400 is located within the receiving groove 40 and includes an excitation LED chip 401 for exciting phosphors and a package 402. The package 402 contains phosphors 403, and the mixture fills the receiving groove 40 and covers the excitation LED chip 401. The excitation LED chip 401 has a pair of pins 44a and 44b.

[0132] The red light-emitting unit 500 is located within the receiving groove 50 and includes an excitation LED chip 501 for exciting phosphors and a package 502. The package 502 contains phosphors 503, and the mixture fills the receiving groove 50 and covers the excitation LED chip 501. The excitation LED chip 501 has a pair of pins 55a and 55b.

[0133] The aforementioned pins 11a, 11b, 22a, 22b, 33a, 33b, 44a, 44b, 55a, and 55b are electrically isolated from each other. Packages 102, 202, 302, 402, and 502 can be made of silicone resin, epoxy resin, or a combination thereof, ensuring electrical isolation between the light-emitting units 100, 200, 300, 400, and 500.

[0134] In this embodiment of the application, the phosphor is configured to be excited by the excited LED chip to convert part of the light emitted by the excited LED chip into light with a longer wavelength, which may specifically include at least one of the following:

[0135] 1) The phosphor 303 includes blue-green phosphor, and the phosphor 303 is configured to convert part of the light emitted by the excited LED chip 301 into blue-green light when excited by the excited LED chip 301.

[0136] 2) The phosphor 403 includes yellow phosphor, and the phosphor 403 is configured to convert part of the light emitted by the excited LED chip 401 into yellow light when excited by the excited LED chip 401.

[0137] 3) The phosphor 503 includes red phosphor, and the phosphor 503 is configured to convert part of the light emitted by the excited LED chip 501 into red light when excited by the excited LED chip 501.

[0138] The above is a packaging structure of one embodiment of the light source module. Other packaging structures can also be used in other embodiments, such as a packaging structure with a support frame or a packaging structure without a support frame. The following uses the blue-green light-emitting unit 300 as an example, combined with... Figures 14a-14d The light source module shown has a bracket packaging structure, and Figures 15a-15c The bracketless packaging structure of the light source module is shown, and other packaging structures are explained.

[0139] See Figure 14a In a scenario with a support structure, the main body 600 is a support structure with a receiving groove 30 and a blue-green light-emitting unit 300 composed of an excitation LED chip 301, a package 302, and a phosphor 303. The receiving groove 30 has a trapezoidal cross-section. The excitation LED chip 301 is placed inside the receiving groove 30 and electrically connected to the outside via pins 33a and 33b. The phosphor 303 can be applied circularly to the surface and both sides of the excitation LED chip 301 by spraying or coating, and then the receiving groove 30 is filled with the package 302 to cover the phosphor 303.

[0140] See Figure 14bIn a scenario with a support package, the main body 600 serves as a substrate, on which a blue-green light-emitting unit 300, consisting of an excitation LED chip 301, a package 302, and a phosphor 303, is mounted. The excitation LED chip 301 is placed on the main body 600 and electrically connected to the outside via pins 33a and 33b. The phosphor 303 can be formed on the surface and sides of the excitation LED chip 301 using methods such as spraying, coating, phosphor film lamination, or phosphor ceramic sheet mounting. Then, the package 302 is filled and covers the phosphor 303 using injection molding with a mold (e.g., a mold with a circular cross-section). The main body 600 can be made of ceramic or metal, etc.

[0141] See Figure 14c For scenarios with bracket-based packaging, the main body 600 serves as a substrate, on which a blue-green light-emitting unit 300, consisting of an excitation LED chip 301, a package 302, and a phosphor 303, is mounted. It employs a CSP (Chip-on-Package) packaging method, suitable for high-power chips. The excitation LED chip 301 is placed on the main body 600 and electrically connected to the outside via pins 33a and 33b. The package 302 and phosphor 303 are mixed and then encapsulated by spraying, coating, phosphor film lamination, or phosphor ceramic sheet mounting to form a light conversion layer on the surface and sides of the excitation LED chip 301. The main body 600 can be made of ceramic or metal, among other materials.

[0142] See Figure 14d In a scenario with a support package, the main body 600 serves as a substrate, on which a blue-green light-emitting unit 300, consisting of an excitation LED chip 301, a package 302, and a phosphor 303, is mounted. The excitation LED chip 301 is placed on the main body 600 and electrically connected to the outside via pins 33a and 33b. The phosphor 303 is applied evenly to the surface of the excitation LED chip 301 using a spraying or coating method. The package 302 is positioned on both sides of the phosphor 303 and the excitation LED chip 301 to complete the encapsulation.

[0143] See Figure 15a In a bracketless packaging scenario, the excitation LED chip 301, the package 302, and the phosphor 303 constitute a blue-green light-emitting unit 300, employing a CSP (Chip-on-Package) packaging method suitable for high-power chips. The excitation LED chip 301 is electrically connected to the external environment via pins 33a and 33b. After the package 302 and phosphor 303 are mixed, a light conversion layer is formed on the surface and sides of the excitation LED chip 301 using methods such as spraying, coating, phosphor film lamination, or phosphor ceramic sheet mounting to complete the encapsulation. The main body 600 can be made of ceramic or metal, etc.

[0144] See Figure 15bIn a scenario without a support frame, the excitation LED chip 301, the package 302, and the phosphor 303 constitute a blue-green light-emitting unit 300. The excitation LED chip 301 is electrically connected to the outside via pins 33a and 33b. The package 302 is disposed on both sides of the excitation LED chip 301, and the phosphor 303 is applied to the surfaces of the excitation LED chip 301 and the package 302 using a spraying or coating method to complete the encapsulation.

[0145] See Figure 15c In a scenario without a support frame, the excitation LED chip 301, the package 302, and the phosphor 303 constitute a blue-green light-emitting unit 300. The excitation LED chip 301 is electrically connected to the outside via pins 33a and 33b. The phosphor 303 is applied evenly to the surface of the excitation LED chip 301 using a spraying or coating method. The package 302 is positioned on both sides of the excitation LED chip 301 and the package 302 to complete the encapsulation.

[0146] Figure 16 This is a schematic diagram of a lighting system provided in an embodiment of this application. Figure 16 As shown in the figure, this application embodiment also provides a lighting system 1600, including: a light source 700 and a driving circuit 800.

[0147] The light source 700 includes at least one light source module as described in any of the above embodiments.

[0148] The driving circuit 800 is connected to each light-emitting unit in the light source module and supplies power to them. The driving circuit 800 controls the current / voltage supplied to each light-emitting unit.

[0149] In this embodiment, current / voltage refers to current and / or voltage. That is, the driving circuit 800 can control the current supplied to each light-emitting unit separately, or the driving circuit 800 can control the voltage supplied to each light-emitting unit separately, or the driving circuit 800 can control both the current and voltage supplied to each light-emitting unit separately, without limitation. The current / voltage mentioned below have the same interpretation and will not be elaborated further.

[0150] Figure 17 This is a schematic diagram of another lighting system provided in an embodiment of this application. Figure 17 As shown in the embodiments of this application, the driving circuit 800 may include:

[0151] The power conversion module 801 converts the external power supply into the DC power required by the light source module.

[0152] Control module 802 generates control signals;

[0153] The drive module 803 receives the DC power output from the power conversion module 801 and the control signal output from the control module 802. It adjusts the DC power according to the control signal. The drive module 803 is electrically connected to each light-emitting unit in the light source module and outputs the required drive current / voltage to each light-emitting unit according to the adjusted DC power.

[0154] In this embodiment, the control signal generated by the control module 802 can be a pulse width modulation (PWM) signal. Each light-emitting unit 100–500 can be independently controlled via PWM dimming, and different duty cycles can be applied to modulate the luminous power of each unit to achieve a light mixing effect.

[0155] In one implementation, the control module 802 can receive dimming / color adjustment commands from an external source and generate control signals accordingly. The control module may include a communication unit to receive dimming / color adjustment commands via wired or wireless means, the specific method of which is not limited.

[0156] In another implementation, the control module 802 can read preset control parameter values ​​to generate a control signal. These control parameter values ​​include the control parameter values ​​corresponding to each light-emitting unit when the light source module produces different colors of light or white light with different color temperatures.

[0157] The control parameter values ​​mentioned above can be voltage values, current values, or PWM signals. The control parameter values ​​can be stored in the storage module, and the control module 802 can read the control parameter values ​​from the storage module.

[0158] In this embodiment, the light source 700 may include two or more light source modules. Each light source module has a light-emitting unit of a certain color connected in series with a light-emitting unit of the same color according to its light color, and then electrically connected to the driving module 803.

[0159] For example, such as Figure 17 As shown, the light source 700 includes two or more light source modules. The first blue light-emitting unit 100 of each light source module is connected in series and electrically connected to the driving module 803. The second blue light-emitting unit 200 of each light source module is connected in series and electrically connected to the driving module 803. The blue-green light-emitting unit 300 of each light source module is connected in series and electrically connected to the driving module 803. The yellow light-emitting unit 400 of each light source module is connected in series and electrically connected to the driving module 803. The red light-emitting unit 500 of each light source module is connected in series and electrically connected to the driving module 803.

[0160] In this embodiment of the application, the lighting system described above can control the light source module according to control parameter values, and the obtained white light can include at least one of the following:

[0161] 1) The color rendering index (CRI) is greater than 93 in the color temperature range of 1800K to 12000K.

[0162] 2) The spectral fit (SFR) is greater than 75% in the color temperature range of 1800K to 12000K.

[0163] 3) The color rendering index (CRI) is greater than 95 in the color temperature range of 2700 to 6500 K.

[0164] 4) The spectral fit (SFR) is greater than 82% in the color temperature range of 2700–6500 K.

[0165] 5) Within the color temperature range of 2700 to 6500 K, R1 to R15 are all greater than 90.

[0166] 6) Within the color temperature range of 2700K to 6500K, the color rendering index (CRI) is greater than 85, and the black pixel light sensitivity ratio is 0.35 to 1.09.

[0167] 7) At a color temperature of 4000K, the color rendering index (CRI) is greater than 85, and the black pixel light sensitivity ratio is 0.61 to 0.82.

[0168] 8) At a color temperature of 4000K, the color rendering index (CRI) is greater than 80, and the black pixel light sensitivity ratio is 0.58 to 0.85.

[0169] The lighting system provided in this application includes a light source and a driving circuit. The light source includes at least one light source module. The driving circuit is connected to and supplies power to each light-emitting unit within the light source module. The driving circuit controls the current / voltage supplied to each light-emitting unit. Each light source module includes five light-emitting units with different peak wavelengths and different spectral half-widths: a first blue light-emitting unit, a second blue light-emitting unit, a blue-green light-emitting unit, a yellow light-emitting unit, and a red light-emitting unit. Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emitted by the light source module, which can improve the light quality of the mixed light and has the characteristic of adjustable rhythm.

[0170] Based on the same concept as the light source module and lighting system described above, this application also provides a lamp, which may include: a light source module as provided in any of the above embodiments, or a lighting system as provided in any of the above embodiments.

[0171] In this embodiment of the application, the above-mentioned lamps may be of various types, including but not limited to: pendant lights, ceiling lights, table lamps, downlights or spotlights, etc., and are not specifically limited.

[0172] Figure 18 This is a structural schematic diagram of a lamp provided in an embodiment of this application. Figure 18As shown, the luminaire D1 is a lamp panel, including the lighting system provided in any of the above embodiments, or a light source module 1. The luminaire D1 includes a chassis 86, a light source board 85, a power supply box 87, and a face frame 88. The light source board 85 is provided with multiple light source modules 1, the face frame 88 is provided with a diffuser plate 89, and the power supply box 87 is provided with the driving circuit provided in any of the above embodiments.

[0173] In this embodiment, the first blue light-emitting unit 100, the second blue light-emitting unit 200, the blue-green light-emitting unit 300, the yellow light-emitting unit 400, and the red light-emitting unit 500 in each light source module 1 are wired separately in the lamp D1. The light-emitting units of the same type (same color) in each light source module 1 are connected in series and then connected to the driving circuit in the power supply box 87 to form the aforementioned lighting system.

[0174] In this embodiment, the luminaire D1 may also include at least one of a controller, a heat dissipation device, and a light distribution component, depending on the specific function and requirements of the luminaire. The controller can be used to adjust the color and intensity of the light emitted by the light source module 1. In addition to the diffuser plate in the embodiment, the light distribution component may also be a lampshade, a lens, a diffusion element, or a light guide, etc., and this embodiment does not specifically limit it.

[0175] The lamps provided in this application embodiment can achieve the functions provided by the aforementioned lighting system embodiment and the functions provided by the light source module embodiment. The light emitted by the lamps can improve the light quality of mixed light and has the characteristic of adjustable rhythm.

[0176] The foregoing description of the embodiments of this application is for illustrative purposes only and is not intended to exhaustively describe or limit the present invention to the specific forms disclosed. Obviously, many modifications and variations may be made, which may be apparent to those skilled in the art and should be included within the scope of the present invention as defined by the appended claims.

[0177] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0178] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A light source module, characterized by It includes five electrically independent light-emitting units, namely: The first blue light-emitting unit emits blue light with a peak wavelength of 430-445nm; The second blue light-emitting unit emits blue light with a peak wavelength of 455-470nm; The blue-green light-emitting unit emits blue-green light with a peak wavelength of 480-510nm and a spectral half-width of 25-35nm. The yellow light-emitting unit emits yellow light with a peak wavelength of 555-580nm and a spectral half-width of 105-130nm; The red light-emitting unit emits red light with a peak wavelength of 620-660nm and a spectral half-width of 80-100nm; Each light-emitting unit is independently controlled, and the emitted light is mixed to form the light emission of the light source module.

2. The light source module of claim 1, wherein Includes at least one of the following: The light color of the blue-green light-emitting unit is located in the quadrilateral area enclosed by four points (0.061, 0.479), (0.088, 0.521), (0.131, 0.483), and (0.089, 0.415) on the CIE 1931 chromaticity diagram. The color of the yellow light emitting unit is located in the quadrilateral area enclosed by four points (0.395, 0.521), (0.418, 0.572), (0.491, 0.501), and (0.458, 0.454) on the CIE 1931 chromaticity diagram. The color of the red light emitting unit is located in the quadrilateral region enclosed by four points (0.605, 0.351), (0.638, 0.362), (0.699, 0.301), and (0.667, 0.291) on the CIE 1931 chromaticity diagram.

3. The light source module of claim 1, wherein Each of the five light-emitting units includes an excitation LED chip and a package covering the excitation LED chip. At least one of the packages of the blue-green light-emitting unit, the yellow light-emitting unit, and the red light-emitting unit further includes a phosphor. The phosphor is configured to be excited by the excitation LED chip to convert part of the light emitted by the excitation LED chip into light with a longer wavelength.

4. The light source module of claim 3, wherein The phosphor in the encapsulation of the blue-green light-emitting unit includes a blue-green phosphor, which is (Ba,Sr)Si2N2O2:Eu.

5. The light source module of claim 3, wherein the light source module is configured to be mounted on a printed circuit board (PCB) of a display device. The phosphor in the encapsulation of the yellow light-emitting unit includes yellow phosphor.

6. The light source module according to claim 5, characterized in that, The yellow phosphor is one of Y3(Al,Ga)5O12:Ce, Ga-Y3Al5O12:Ce, or (Ba,Sr,Ca,Mg)SiO4:Eu.

7. The light source module according to claim 3, characterized in that, The phosphor in the encapsulation of the red light emitting unit includes red phosphor.

8. The light source module according to claim 7, characterized in that, The red phosphor is one of CaAlSiN3:Eu, (Ca,Sr)AlSiN3:Eu, (Ba,Sr,Ca,Mg)2Si5N8:Eu, K2SiF6:Mn4+, K2GeF6:Mn4+, and K2TiF6:Mn4+.

9. The light source module according to any one of claims 1-8, characterized in that, The five light-emitting units are mixed to obtain white light with a color temperature range of 1800K~12000K. The white light includes at least one of the following: color rendering index (CRI) greater than 93 and spectral fit (SFR) greater than 75%.

10. The light source module according to any one of claims 1-8, characterized in that, The five light-emitting units are mixed to obtain white light with a color temperature range of 2700K~6500K. The white light includes at least one of the following: color rendering index (CRI) greater than 95, spectral fit (SFR) greater than 82%, and R1~R15 all greater than 90.

11. The light source module according to any one of claims 1-8, characterized in that, The five light-emitting units are mixed to obtain white light with a color temperature range of 2700K to 6500K, within which the display index (CRI) is greater than 85 and the black pixel light sensitivity ratio is 0.35 to 1.

09.

12. The light source module according to claim 11, characterized in that, At a color temperature of 4000K, the melanin light sensitivity ratio is 0.61~0.

82.

13. The light source module according to claim 1, characterized in that, When the five light-emitting units are mixed to obtain white light with a color temperature of 4000K, the color rendering index (CRI) is greater than 80, and the black pixel light sensitivity ratio is 0.58~0.

85.

14. The light source module according to claim 3, characterized in that, The light source module is a packaged chip, which includes a main body. The main body is provided with a number of receiving slots equal to the number of the five light-emitting units. The excitation LED chips are respectively disposed in the receiving slots and each has a pair of pins. The pins are electrically isolated from each other. In the first blue light emitting unit and the second blue light emitting unit, the package directly fills the receiving groove and covers the excitation LED chip; In the blue-green light-emitting unit, the yellow light-emitting unit, and the red light-emitting unit, the encapsulant and phosphor are mixed and filled into the receiving groove and cover the excitation LED chip.

15. A lighting system, characterized in that, include: Light source and driving circuit; The light source includes at least one light source module as described in any one of claims 1-14; The driving circuit is connected to and supplies power to each light-emitting unit in the light source module, and controls the current / voltage supplied to each light-emitting unit.

16. The lighting system according to claim 15, characterized in that, The driving circuit includes: The power conversion module converts the external power supply into the DC power required by the light source module. The control module generates control signals; The driving module receives the DC power output from the power conversion module and the control signal output from the control module, adjusts the DC power according to the control signal, and is electrically connected to each light-emitting unit in the light source module. The driving module outputs the required driving current / voltage to each light-emitting unit according to the adjusted DC power.

17. The lighting system according to claim 16, characterized in that, The control signal is a pulse width modulation (PWM) signal.

18. The lighting system according to claim 16, characterized in that, The control module receives dimming / color adjustment commands from the outside and generates the control signal accordingly.

19. The lighting system according to claim 16, characterized in that, The control module reads preset control parameter values ​​to generate the control signal, wherein the control parameter values ​​include the control parameter values ​​corresponding to each light-emitting unit when the light source module generates different colors of light or white light with different color temperatures.

20. The lighting system according to claim 19, characterized in that, The lighting system controls the light source module according to the control parameter values, and the obtained white light includes at least one of the following: The color rendering index (CRI) is greater than 93 in the color temperature range of 1800K to 12000K. The spectral fit (SFR) is greater than 75% in the color temperature range of 1800K to 12000K. The color rendering index (CRI) is greater than 95 in the color temperature range of 2700~6500K; Within the color temperature range of 2700~6500K, the spectral fit (SFR) is greater than 82%. Within the color temperature range of 2700~6500K, R1~R15 are all greater than 90; Within a color temperature range of 2700K to 6500K, the color rendering index (CRI) is greater than 85, and the black pixel light sensitivity ratio is 0.35 to 1.

09. At a color temperature of 4000K, the color rendering index (CRI) is greater than 85, and the black visual light sensitivity ratio is 0.61~0.

82. At a color temperature of 4000K, the color rendering index (CRI) is greater than 80, and the black pixel light sensitivity ratio is 0.58~0.

85.

21. The lighting system according to claim 16, characterized in that, The light source includes two or more light source modules. Each light source module has a light-emitting unit of a certain color connected in series with a light-emitting unit of the same color according to its light color, and then electrically connected to the driving module.

22. A lamp, characterized in that, include: The light source module as described in any one of claims 1-14, or the lighting system as described in any one of claims 15-21.

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