Light source modules, lighting systems and luminaires

Abstract

This invention proposes a light source module, a lighting system, and a luminaire. The light source module includes a first light-emitting unit and a second light-emitting unit that are electrically independent of each other. When the light source module is working, the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit are mixed to form the white light emitted by the light source module. Because the light source module uses a second light-emitting unit whose light emission includes at least two spectral emission peaks located in the 430-475nm range, the overall energy distribution of the white light obtained after mixing the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit is more uniform in the blue light region. At the same time, the light quality of the white light emitted by the light source module is better. In addition, the white light obtained after mixing is close to the D-series standard light source at around 480nm. The light source module achieves both rhythm regulation effect and light quality while possessing a lower blue light peak energy, which makes the light source module widely applicable in various scenarios.

Description

Technical Field

[0001] This utility model relates to the field of lighting equipment technology, and in particular to a light source module, lighting system and lamp. Background Technology

[0002] The human biological clock is an intrinsic physiological mechanism that regulates sleep-wake cycles, body temperature, hormone secretion, and more. This biological clock is particularly sensitive to light; therefore, light can be used to regulate the body's physiological rhythms, which is one of the main ways LED lighting is used in the field of healthy lighting. For example, light can regulate the secretion of melanopsin and transmit it to the pineal gland (Epiphysis), thereby regulating melatonin.

[0003] Generally, using a brighter light source with a higher color temperature is the most direct way to achieve a more efficient melatonin suppression effect. However, most dimming and color-tuning products limit the white light color temperature specifications, such as using a 5700K or 6500K white light source. This means the optimal adjustment effect is limited to the highest color temperature setting. The cyan wavelength in the light source has a stimulating effect on intrinsically photosensitive retinal ganglion cells (ipRGCs) in the human body. To achieve a higher rhythmic stimulation effect, adding a blue-green LED chip with an emission wavelength of around 480nm is an option. This allows for a better melatonin suppression effect through the combination of the highest color temperature white light source and the blue-green LED chip.

[0004] However, as the energy of blue-green light chips increases, the continuity of the spectrum is disrupted, and the color rendering index decreases significantly. This results in better rhythm regulation but at the expense of light quality. Furthermore, to obtain colored light sources, the conventional approach is to use RGB light sources for mixing, or more advancedly, to use a blue-light-excited phosphor manufacturing process. This simplifies color extraction, allowing the target blue light color to be achieved with a single component. However, both RGB light source mixing and blue-light-excited phosphor methods share a common drawback: excessively high blue light peak energy, which may pose a risk of blue light hazard. Therefore, how to provide a lighting device that balances rhythm regulation and light quality while simultaneously achieving lower blue light peak energy has become a pressing issue. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems by proposing a light source module, lighting system, and lamp for a lighting device that combines rhythm regulation effect and light quality with lower blue light peak energy.

[0006] To achieve the above functions, the present invention provides a light source module, comprising a first light-emitting unit and a second light-emitting unit that are electrically independent of each other.

[0007] The first light-emitting unit is configured to emit white light;

[0008] The second light-emitting unit includes a light source and an encapsulation body and a phosphor covering the light source. The light emitted by the second light-emitting unit includes at least two spectral emission peaks located in the range of 430-475 nm. The difference between the peak wavelengths of any two spectral emission peaks is greater than or equal to 10 nm. Its light color is blue light located in the range enclosed by four points B1(0.18,0.22), B2(0.22, 0.28), B3(0.24,0.21), and B4(0.19,0.19) in the CIE1931 color space.

[0009] When the light source module is working, the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit are mixed to form the white light emitted by the light source module.

[0010] Preferably, the light source is any two or three of the first LED chip, the second LED chip, and the third LED chip;

[0011] The first LED chip is configured to emit blue light with a peak wavelength in the range of 430-445nm;

[0012] The second LED chip is configured to emit cyan light with a peak wavelength in the range of 445-460nm;

[0013] The third LED chip is configured to emit green light with a peak wavelength of 460-475nm.

[0014] Preferably, the difference between the maximum and minimum spectral intensities of the blue light emitted by the first LED chip is less than 30% of the maximum spectral intensity.

[0015] The spectral intensity of the cyan light emitted by the second LED chip is 40%-70% of the maximum spectral intensity of the blue light emitted by the first LED chip;

[0016] The spectral intensity of the green light emitted by the third LED chip is 20%-45% of the maximum spectral intensity of the blue light emitted by the first LED chip.

[0017] Preferably, the phosphor contains at least one phosphor with a peak wavelength at 485 nm. A 500nm blue-green phosphor and a peak wavelength located at 500nm Yellow-green phosphor at 580nm.

[0018] Preferably, the blue-green phosphor is (Ba,Sr)Si2N2O2:Eu;

[0019] and / or

[0020] The yellow-green phosphor is (Lu,Yb,Tb)3(Al,Ga)5O12:Ce, Y3(Al,Ga)5O12:Ce, Ga One or more of Y3Al5O12:Ce and (Ba,Sr,Ca,Mg)SiO4:Eu are mixed.

[0021] Preferably, the color temperature of the white light emitted by the first light-emitting unit is fixed at 4000K, and the color temperature of the white light emitted by the light source module is adjustable between 5700-20000K, and the color deviation (Duv) from the blackbody radiation is less than 0.005.

[0022] Preferably, when the color temperature of the white light emitted by the light source module is in the range of 5700-16000K, the color rendering index (CRI) is greater than 90.

[0023] Preferably, the ratio between the white light emitted by the light source module and the black pixel light-sensing efficiency ratio Kmel of a standard light source with the same color temperature is greater than 90%.

[0024] Preferably, the light source module is a packaged chip. The light source module includes a main body, on which a receiving groove corresponding to the second light-emitting unit is provided. The light source and the phosphor are disposed in the receiving groove. The packaged body fills the receiving groove and covers the light source. The packaged body is mixed with the phosphor.

[0025] This utility model also provides a lighting system, including: a light source and a driving circuit;

[0026] The light source includes at least one light source module as described above;

[0027] The driving circuit is electrically connected to the first light-emitting unit and the second light-emitting unit respectively and supplies them with power. The driving circuit controls the current / voltage supplied to the first light-emitting unit and the second light-emitting unit respectively.

[0028] Preferably, the driving circuit includes:

[0029] A power conversion module that converts external power into DC power required by the light source module;

[0030] The control module generates control signals;

[0031] The LED driver module receives the DC power output from the power conversion module and the control signal from the control module, adjusts the DC power according to the control signal, and is electrically connected to the first light-emitting unit and the second light-emitting unit respectively, and outputs the adjusted driving current / voltage required by each light-emitting unit.

[0032] Preferably, the control signal is a PWM signal.

[0033] Preferably, the control module includes a communication module that receives dimming / color adjustment commands from the outside and uses them to generate the control signal.

[0034] Preferably, the control module includes a storage module storing preset control parameter values. The control parameter values ​​are the control parameter values ​​corresponding to the first light-emitting unit and the second light-emitting unit when the light source module generates different color temperatures. The light source module is controlled according to the control parameter values. The white light color temperature emitted by the first light-emitting unit is fixed at 4000K, and the white light color temperature emitted by the light source module is adjustable between 5700-20000K, and the color deviation Duv from the blackbody radiation is less than 0.005.

[0035] Preferably, the light source module is controlled according to the control parameter values, and when the color temperature of the white light emitted by the light source module is in the range of 5700-16000K, the color rendering index (CRI) is greater than 90.

[0036] Preferably, the light source module is controlled according to the control parameter values, and the ratio between the white light emitted by the light source module and the black pixel light-sensing efficiency ratio Kmel of the same color temperature standard light source is greater than 90%.

[0037] Preferably, the light source includes two or more light source modules, and the first light-emitting unit and the second light-emitting unit in each light source module are connected in series and electrically connected to the LED driver module.

[0038] This utility model also provides a lamp, including the light source module as described above, or including the lighting system as described above.

[0039] The light source module provided by this invention uses a second light-emitting unit that emits light with at least two spectral emission peaks located in the 430-475nm range. This results in a more uniform energy distribution in the blue light region of the white light obtained after mixing the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit, and a reduction in the energy of the blue light peak. Simultaneously, the white light emitted by the light source module exhibits good color rendering index and light quality. Furthermore, the mixed white light at around 480nm is close to that of the D-series standard light source, which contributes to its excellent rhythm regulation effect. In summary, the light source module achieves a balance between rhythm regulation effect and light quality while possessing a lower blue light peak energy. Due to these comprehensive advantages, this light source module has promising application prospects in various scenarios such as education, healthcare, and home use. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in one or more embodiments of the present utility model 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 one or more embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the second light-emitting unit conforming to a preferred embodiment of the present utility model;

[0042] Figure 2 This is a relative spectral intensity diagram of white light emitted by the light source module of a preferred embodiment of this utility model;

[0043] Figure 3 The preferred embodiment of this utility model is located at 430. A schematic diagram comparing the spectral intensity of peak wavelengths within the 475nm range;

[0044] Figure 4 This is the dimming trajectory of the light source module in a preferred embodiment of this utility model;

[0045] Figure 5 This is a schematic diagram of the color coordinate range of the second light-emitting unit in a preferred embodiment of this utility model;

[0046] Figure 6 This is a spectral description of the two light-emitting units involved in light mixing in a preferred embodiment of this utility model;

[0047] Figure 7 It shows the spectral distribution of six different second light-emitting units with a target color temperature of 5700K.

[0048] Figure 8 It shows the spectral distribution of six different second emitting units with a target color temperature of 6500K.

[0049] Figure 9 It shows the spectral distribution of six different second light-emitting units with a target color temperature of 10000K.

[0050] Figure 10 It shows the spectral distribution of six different second light-emitting units with a target color temperature of 20000K.

[0051] Figure 11 This is a comparison chart of the color rendering index (CRI) for different color temperatures of the preferred embodiment of this utility model;

[0052] Figure 12 This is a comparison chart of the Kmel ratio of black visual pigment light-sensing efficiency at different color temperatures according to a preferred embodiment of this utility model;

[0053] Figure 13 This is a schematic diagram of the packaging structure of the light source module in other preferred embodiments of this utility model;

[0054] Figure 14 This is a schematic diagram of the structure of the lighting system of a preferred embodiment of this utility model;

[0055] Figure 15 This is a schematic diagram of the structure of a lamp in a preferred embodiment of this utility model.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1-Light source module, 2-Driver circuit, 21-Power conversion module, 22-Control module, 23-LED driver module, 100-First light-emitting unit, 200-Second light-emitting unit, 201-Light source, 202-Package, 203-Phosphor, 30-Main body, 31-Accommodation slot, 41a-Pin, 41b-Pin, 85-Light source board, 86-Chassis, 87-Power supply box, 88-Face frame, 89-Diffuser plate, D1-Lamp fixture. Detailed Implementation

[0058] The following description, in conjunction with the accompanying drawings and some preferred embodiments conforming to the present invention, provides a further detailed description of a light source module, lighting system, and lamp.

[0059] One specific embodiment of the light source module of this utility model is a white LED package chip with mixed light. The package form can be PLCC surface mount package, ceramic surface mount package, CSP package, multi-in-one single surface mount package or COB chip integrated package. This utility model does not limit the specific type of package.

[0060] The light source module may include two spaced-apart light-emitting units: a first light-emitting unit and a second light-emitting unit. The first light-emitting unit is configured to emit white light, and the second light-emitting unit is configured to emit blue light with a peak wavelength between 430-475nm, the blue light being predominantly sky blue. The white light emitted by the first light-emitting unit in the light source module has a fixed color temperature, and the white light emitted by the light source module can be obtained by adjusting the blue light emitted by the second light-emitting unit. This invention does not limit the structure of the first light-emitting unit.

[0061] Figure 1 A schematic diagram of the structure of the second light-emitting unit 200 disposed on the main body 30 is shown. Figure 1 As shown, the second light-emitting unit 200 may include a light-emitting source 201 composed of LED chips, and the light-emitting source 201 is covered by an encapsulation body 202. The LED chips may be upright or flip-chip, and a single LED chip or multiple LED chips may be connected together in series, parallel, or series-parallel configurations. In this embodiment, to accommodate the encapsulation body 202, the main body 30 is a non-metallic support made of materials such as plastic, and a receiving groove 31 is provided inside the main body 30. The material of the non-metallic support can be any one of PPA, PCT, or EMC. The light-emitting source 201 is disposed in the receiving groove 31 and has a pair of pins 41a and 41b, which are electrically isolated from each other. The encapsulation body 202 may be made of silicone resin, epoxy resin, or a combination thereof, and is filled into the receiving groove 31 and covers the light-emitting source 201 to ensure electrical isolation between the second light-emitting unit 200 and the first light-emitting unit.

[0062] The light source 201 is an LED chip assembly, containing two or more LED chips with different peak wavelengths, connected in series or parallel. The LED chips refer to those emitting a peak wavelength of 430 nm. LED chips displaying colored light within the 475nm range. The reason for choosing a combination of multiple different LED chips to form the light source 201 is because the phosphor exhibits a high full width at half maximum (FWHM). width half Monochrome LED chips typically have a wider FWHM (Frequency Wavelength, Maximum Wavelength) distribution, while their FWHM is narrower. In this embodiment, although a phosphor 203 is added to the second light-emitting unit 200, the blue light portion of the white light emitted by the light source module still relies on the unconverted energy from the LED chip. Therefore, given the narrow FWHM of the monochrome LED chip, selecting chips with different peak wavelengths can create superposition in the blue light band, resulting in a more uniform overall energy distribution in the blue light region and a lower blue light peak energy. In this embodiment, the difference in peak wavelength between any two LED chips must be greater than or equal to 10 nm. This ensures that the white light emitted by the light source module has a wider energy distribution and a lower blue light peak in the blue light region, thereby reducing user visual fatigue, protecting eye health, and improving sleep quality.

[0063] In the preferred embodiment, the peak wavelength can be 430 nm. 475nm LED chips are divided into three types, the first being the LED chip with a peak wavelength of 430 nm. 445nm; the second LED chip has a peak wavelength of 445nm. 460nm; the third LED chip, with a peak wavelength of 460nm. The peak wavelength is 475nm, and the difference between any two of the three types is guaranteed to be greater than or equal to 10nm. The light source 201 can be any combination of two or three of the first, second, and third LED chips. For example, the light source 201 can include one first LED chip and one second LED chip; or, the light source 201 can include one first LED chip and one third LED chip; or, the light source 201 can include one second LED chip and one third LED chip; or, the light source 201 can include one first LED chip, two second LED chips, and one third LED chip. This invention does not limit the arrangement and order of the first, second, and third LED chips in the receiving groove 31; the arrangement can be horizontal side-by-side, etc.

[0064] The package 202 contains a phosphor 203, the phosphor 203 comprising at least one component with a peak wavelength at 485 nm. 500nm blue-green phosphor and at least one peak wavelength located at 500nm A 580nm yellow-green phosphor. To obtain a wider FWHM, phosphor 203 can simultaneously contain two phosphors with different peak wavelengths: blue-green and yellow-green. The blue-green and yellow-green phosphors in this invention are not limited to containing only one chemical component; they can each be a mixed phosphor, meaning that more than one phosphor can be mixed to ultimately form the blue-green or yellow-green phosphor required by this invention. The blue-green phosphor can be selected from (Ba,Sr)Si2N2O2:Eu, and the yellow-green phosphor can be selected from (Lu,Yb,Tb)3(Al,Ga)5O12:Ce, Y3(Al,Ga)5O12:Ce, and Ga... It is composed of any one or a combination of multiple of Y3Al5O12:Ce, (Ba,Sr,Ca,Mg)SiO4:Eu.

[0065] Table 1. Comparison of peak blue light intensity of different schemes

[0066]

[0067] Multiple LED chips of the light source 201 are connected in series or parallel and placed in the receiving groove 31. After the light emitted by the light source excites the phosphor 203, the blue light emitted by the second light-emitting unit 200 and the white light emitted by the first light-emitting unit are mixed to obtain white light. When the light source 201 is composed of a first LED chip, a second LED chip, and a third LED chip, the peak intensity of the blue light of the mixed white light is shown in Table 1. The peak intensity of the blue light decreases significantly, and the spectral energy distribution is as follows. Figure 2 As shown. Figure 2 This is a relative spectral intensity diagram. Figure 2 The data shows a comparison of the white light emitted by the light source module under the same luminous flux and the target color coordinates (Cx, Cy) of other schemes within the range of (0.201±0.002, 0.237±0.002). Figure 2 Each curve has been normalized, and each point on the curve represents the energy at a specific wavelength on the horizontal axis. For example... Figure 2 As shown, the spectral curve 100 of the white light emitted by the light source module includes at least four spectral emission peaks, with the first peak wavelength P11, the second peak wavelength P12, and the third peak wavelength P13 located at 430 nm. 475nm, the fourth peak wavelength P14 is located in the blue light region of about 480nm, which has a rhythmic stimulation effect.

[0068] Figure 3 It shows the location at 430 A schematic diagram comparing the spectral intensities of three peak wavelengths within the 475nm range. (See diagram for reference.) Figure 3As shown, in the blue light emitted by the second light-emitting unit (including the subsequent example ad), the difference between the highest and lowest peak values ​​in the peak group corresponding to the first peak (blue light) wavelength P11 is within 30%, and the spectral intensity at the second peak (cyan light) wavelength P12 is 40% of the spectral intensity of the highest peak value at the first peak wavelength P11. 70%, the spectral intensity at the third peak (green light) wavelength P13 is 20% of the spectral intensity of the highest peak at the first peak wavelength P11. 45%.

[0069] The light emitted by the second light-emitting unit 100 is obtained by mixing the light emitted from the LED chip and the light emitted from the phosphor. The light emitted by the second light-emitting unit 100 is blue, and is located in the quadrilateral area enclosed by the four points B1(0.18,0.22), B2(0.22,0.28), B3(0.24,0.21), and B4(0.19,0.19) on the 1931 CIE chromaticity diagram.

[0070] The first light-emitting unit is fixed to neutral white light with a color temperature of 4000K. By dimming the second light-emitting unit, various white lights with different color temperatures can be mixed to produce light output from the light source module. Figure 4 The dimming trajectory of the second light-emitting unit is shown. In this embodiment, a PWM signal can be used as the control signal to control the second light-emitting unit through PWM dimming, thereby achieving a light mixing effect.

[0071] To evaluate the balance between rhythm, light quality, and lower blue light peak energy in the white light spectrum emitted by the light source module in the embodiment, this invention constructed six different second light-emitting units, four of which serve as examples and two as comparative examples. The comparative examples include the aforementioned RGB mixed light source and a general blue light-excited phosphor single-unit light source. Using the D-series standard light source (whose spectral distribution typically represents the daylight spectrum) as a benchmark, the rhythm was evaluated using the black-pixel light sensitivity ratio Kmel, the light quality was evaluated using the display index CRI, and the blue light peak energy was evaluated using the blue light peak height.

[0072] The calculation process for the spectrum of the D-series standard light source is as follows:

[0073] First, the color coordinates of the D-series standard light source corresponding to the target color temperature must be obtained. x D , y D If the color temperature T≤7000K, the color coordinates x D Calculated using Formula 1, if T > 7000K, the chromatic coordinates... x DThen it is calculated using Formula 2. The target color temperature is the color temperature of the white light emitted by the light source module.

[0074] (Formula 1)

[0075] (Formula 2)

[0076] Where K represents the unit of T (Kelvin).

[0077] After obtaining the color coordinates x D Then, use Formula 3 to calculate y. D value.

[0078] (Formula 3)

[0079] After obtaining the color coordinates (x) D ,y D After that, use formula 4-6 to calculate the relative spectrum S of the D-series standard light source. r (λ):

[0080] (Formula 4)

[0081] (Formula 5)

[0082] (Formula 6)

[0083] Where S0(λ) is the average spectral power distribution of a typical solar wavelength λ, and S1(λ) and S2(λ) are the two most important eigenvectors of all solar distribution sets. The above formulas are all basis functions with a wavelength of 5nm as the interval.

[0084] Furthermore, to quantify the degree of stimulation of melanoplasm response by a light source, the equivalent melanopic lux (EML) is generally used for evaluation, thereby quantitatively describing the non-visual biological effects of light on humans. A high EML level indicates that the light inhibits melatonin secretion, improving alertness and concentration; conversely, a low EML level indicates that the light promotes melatonin secretion, suitable for creating relaxing lighting scenarios. However, since EML assesses the illuminance of the entire space and cannot be directly defined by the characteristic parameters of the light source, this invention uses the "melanopic light sensitivity ratio Kmel" to quantify the non-visual effects of light. The trend of this ratio has the same representative meaning as EML. The specific calculation formula for Kmel is as follows:

[0085] (Formula 7)

[0086] Wherein, MEDI (D65) represents the visual melanin illuminance of an equivalent D65 light source, E vision Let S(λ) represent visual illuminance, S(λ) represent the spectral power distribution of the light source, V(λ) represent the visual luminous efficiency function, and Mel(λ) represent the photosensitive function of melanopsin photoreceptor cells (ipRGCs).

[0087] Table 2 shows the fabrication details of six different second light-emitting units, including the LED chip, phosphor type, and mixing ratio used in the second light-emitting unit.

[0088] Table 2. Fabrication details of different second light-emitting units

[0089]

[0090] Table 3 shows the color coordinate results of the six different second light-emitting units in Table 2. As shown in Table 3, the color coordinates of the six different second light-emitting units are similar. Figure 5 A schematic diagram of the color coordinate range of the second light-emitting unit 100 as an example is shown, such as... Figure 5 As shown, the color coordinates of the second light-emitting unit 100 corresponding to example ad are located within the quadrilateral region enclosed by the aforementioned four points B1(0.18,0.22), B2(0.22,0.28), B3(0.24,0.21), and B4(0.19,0.19).

[0091] Table 3 Color coordinates of different second emitting units

[0092]

[0093] Figure 6 The spectral descriptions of the two emitting units involved in light mixing are shown. (For example...) Figure 6 As shown, the first light-emitting unit emits neutral white light of 4000K, which is close to the spectrum of the D40 standard light source in the range of 430-580nm. The second light-emitting unit, as an example, emits light with three emission peaks in the range of 430-475nm and one emission peak around 480nm. The three emission peaks in the range of 430-475nm make the energy distribution of the emitted light more uniform. The second light-emitting unit, as a comparative example, emits light with a higher blue light peak in the range of 430-580nm.

[0094] Table 4 shows the blue light peak ratios of six different second emitting units. In Table 4, the blue light peak height is calculated based on the same brightness (total radiant power) and using the example with the highest blue light peak as a baseline (100%). As can be seen from Table 4, the blue light peak height is significantly reduced when using the second emitting unit in this embodiment (example a). The relative spectral intensity diagram of the second emitting unit in example a can be found in [reference]. Figure 2 .

[0095] Table 4 Color coordinates of different second light-emitting units

[0096]

[0097] The target color temperature is the color temperature of the white light formed by mixing the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit when the corresponding light source module is working. Figure 7-10 These are the spectral distribution diagrams of the light source modules corresponding to six different second light-emitting units when the target color temperature reaches 5700K, 6500K, 10000K, and 20000K, respectively. Figure 7-10 As shown, when the target color temperature is 5700K, 6500K, 10000K and 20000K, the peak wavelength in the example has a more uniform energy distribution in the range of 430-475nm, and the spectrum is close to that of the comparison example b (corresponding to the RGB mixed light source) at around 480nm. This makes the white light obtained after mixing perform well in terms of rhythm regulation.

[0098] Table 5. Spectrum of the light source module at a target color temperature of 5700K

[0099]

[0100] Table 6. Spectrum of the light source module at a target color temperature of 6500K

[0101]

[0102] Table 7. Spectrum of the light source module at a target color temperature of 10000K

[0103]

[0104] Table 8. Spectrum of the light source module at a target color temperature of 20000K

[0105]

[0106] Table 5-8 shows the Color Rendering Index (CRI) and Melanolyte Light Efficiency Ratio (Kmel) of white light emitted by six different second-emitting units corresponding to the light source modules at target color temperatures of 5700K, 6500K, 10000K, and 20000K, respectively. Integrating the CRI and Kmel values ​​from Table 5-8 yields a comparison chart of CRI for different color temperatures. Figure 11 ), and a comparison chart of the Kmel ratio of melanin light sensitivity at different color temperatures ( Figure 12 ),from Figure 11 and Figure 12 It can be seen that:

[0107] (1) Color Rendering Index (CRI): When the light is mixed to a higher color temperature, all examples (a~d) have a higher color rendering index level than the comparison examples (a and b). When the light is mixed to a maximum of 16000K, the color rendering index is still above 90, that is, all examples have good light quality.

[0108] (2) Melanochrome light sensitivity ratio (Kmel): Comparative example a exhibits a higher Kmel level during the light mixing process because the spectrum of comparative example a has a higher proportion in the 480-500nm band (e.g., Figure 2 As shown in the figure, when mixing light to a higher color temperature, as the mixing ratio of comparative example a increases, the Kmel level also increases. The Kmel levels of all examples (a~d) are close to those of the D-series standard light source, and the Kmel level is between 90 and 105% of that of the standard light source. That is, all examples have a good rhythm regulation effect (i.e., they have a good wake-up function).

[0109] In summary, although comparative example a has a higher Kmel level, its CRI is significantly lower. However, all examples (a-d) are significantly better than comparative examples a and b in terms of the overall performance of Kmel and CRI. They can achieve a color rendering index greater than 90 and a Kmel of 90-105% of the standard light source when mixed to 16000K. Among them, example c performs the best among all examples. The overall CRI and Kmel mixing levels of examples a-d are close to those of the D-series standard light source.

[0110] As can be seen from the above examples, the white light emitted by the light source module achieves a balance between rhythm regulation and light quality while possessing a lower peak blue light energy. Due to these combined advantages, the light source module shows promising application prospects in various scenarios such as education, healthcare, and home use.

[0111] exist Figure 1 The embodiment illustrates a packaging structure for the second light-emitting unit. This packaging structure is a support-based package. Besides this packaging structure, the second light-emitting unit can be packaged using methods such as... Figure 13 Other types shown include bracket packaging.

[0112] Figure 13 In embodiment a, a second light-emitting unit in the light source module is shown. After the light source is placed, it is electrically connected to the outside through two pins. The phosphor is filled by injection molding and covers the surface of the light source. Then, the receiving groove is filled with an encapsulation body. Figure 13 b is a high-power ceramic packaging method, which uses ceramic or metal as the substrate, with the light source placed on the substrate. The phosphor is then coated, fluorescent film is laminated, or fluorescent ceramic sheet is attached to form a light conversion layer on the surface of the light source. Finally, the package is filled by injection molding to cover the phosphor and the light source. Figure 13 c is CSP packaging, which is suitable for high-power chips. It uses ceramic or metal as the substrate. After the phosphor and the package are mixed, the light conversion layer on the surface of the light source is formed by pressing a phosphor film to complete the packaging. Figure 13 d structure and Figure 13 Similarly, using ceramic or metal as the substrate, a light conversion layer is formed on the surface of the light source by spraying or laminating a phosphor film. The encapsulator is then placed on the outside of this layer to complete the encapsulation. Besides the aforementioned scaffolded encapsulation, other methods include... Figure 13 The second light-emitting unit is shown in e-13g as a supportless package. All of the above methods can achieve the utility model objective, and this utility model does not limit itself to any particular method.

[0113] Another preferred embodiment of this utility model is as follows: Figure 14 The lighting system shown includes the light source module 1 and the driving circuit 2 in the above embodiments.

[0114] The driving circuit 2 includes a power conversion module 21, a control module 22, and an LED driving module 23. The power conversion module 21 connects to an external power source, converting the external power into DC power required by the light source module 1. The control module 22 includes a communication module that receives dimming / color adjustment commands from the outside and generates control signals accordingly. The communication module can be a wired or wireless communication module; this invention does not limit this. The LED driving module 23 receives the DC power output from the power conversion module 21 and the control signals from the control module 22. Based on the control signals, it adjusts the DC power supply, outputting the adjusted driving current / voltage required by each light-emitting unit to the first light-emitting unit 100 and the second light-emitting unit 200 in the light source module 1. Therefore, the LED driving module 23 needs to be electrically connected to the first light-emitting unit 100 and the second light-emitting unit 200 respectively. When the lighting system includes multiple light source modules 1, such as... Figure 14 As shown, the first light-emitting unit 100 and the second light-emitting unit 200 in each light source module 1 are connected in series and then electrically connected to the LED driver module 23.

[0115] As mentioned earlier, the color temperature of the first light-emitting unit in the light source module 1 of the embodiment needs to be fixed at 4000K, and the color temperature of the white light formed by mixing the light emitted by the first and second light-emitting units can be adjusted from 4000K. Since the color temperature is 20000K, the control module 22 includes a storage module containing preset control parameter values. These control parameter values ​​correspond to the control parameters of the first light-emitting unit 100 and the second light-emitting unit 200 when the light source module 1 generates different color temperatures. The control parameter values ​​can be voltage values, current values, or PWM signals. When an external request for a color temperature change is received, the control module 22 receives the command, reads the relevant values ​​from the storage module, forms a control signal, and sends it to the LED driver module 23 to adjust the current / voltage output to the second light-emitting unit 200, causing the light source module 1 to emit white light of the corresponding color temperature.

[0116] Because the light source module 1 uses a second light-emitting unit that emits light with at least two spectral emission peaks located in the 430-475nm range, the energy distribution of the white light obtained after mixing the white light emitted by the first light-emitting unit and the blue light from the second light-emitting unit is more uniform in the overall blue light region. The blue light peak value is reduced by 40-55% compared to traditional RGB mixing schemes and by 30-50% compared to general blue light chip-excited phosphor schemes. At the same time, the white light emitted by the light source module 1 has better light quality, and the color rendering index can be greater than 90% when mixed to 16000K. In addition, the white light obtained after mixing is close to that of the D-series standard light source at around 480nm, and the Kmel is 90-105% of that of the standard light source. It can be seen that the light source module achieves both rhythm regulation effect and light quality while having a lower blue light peak energy.

[0117] The aforementioned light source modules and lighting systems can be applied to various types of lamps. Figure 15A preferred embodiment of the present invention, a lamp fixture D1, is shown. Lamp fixture D1 is a lamp panel, including the lighting system described above. In other preferred embodiments, it can also be a chandelier, ceiling light, etc., or the light source module 1 can be used as a common white light chip in various lamps such as table lamps, downlights, and spotlights. Lamp fixture D1 includes a chassis 86, a frame 88 with a diffuser plate 89, multiple light source modules 1 mounted on a light source plate 85, and a power supply box 87. The aforementioned driving circuit 2 is located within the power supply box 87. In the lamp fixture, the first light-emitting unit 100 and the second light-emitting unit 200 in the light source module 1 are wired separately. Similar light-emitting units in each light source module 1 are connected in series and then connected to the driving circuit 2 in the power supply box 87 to form the aforementioned lighting system. Lamp fixture D1 can also include a controller, a heat dissipation device, and light distribution components, depending on the specific function and requirements of the lamp. The controller can be used to adjust the color and intensity of the light emitted by the light source module 1, while the light distribution components, in addition to the diffuser plate in the embodiment, can also be a lampshade, lens, diffusion element, light guide, etc. This utility model does not limit this aspect.

[0118] The description of the preferred embodiments of the present invention above is for illustrative purposes 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.

Claims

1. A light source module, characterized in that, It includes a first light-emitting unit and a second light-emitting unit that are electrically independent of each other; The first light-emitting unit is configured to emit white light; The second light-emitting unit includes a light source and an encapsulation body and a phosphor covering the light source. The light emitted by the second light-emitting unit includes at least two spectral emission peaks located in the range of 430-475 nm. The difference between the peak wavelengths of any two spectral emission peaks is greater than or equal to 10 nm. Its light color is blue light located in the range enclosed by four points B1(0.18,0.22), B2(0.22,0.28), B3(0.24,0.21), and B4(0.19,0.19) in the CIE1931 color space. When the light source module is working, the white light emitted by the first light-emitting unit and the blue light emitted by the second light-emitting unit are mixed to form the white light emitted by the light source module.

2. The light source module as described in claim 1, characterized in that, The light source is any two or three combinations of the first LED chip, the second LED chip and the third LED chip; The first LED chip is configured to emit blue light with a peak wavelength in the range of 430-445nm; The second LED chip is configured to emit cyan light with a peak wavelength in the range of 445-460nm; The third LED chip is configured to emit green light with a peak wavelength of 460-475nm.

3. The light source module as described in claim 2, characterized in that, The difference between the maximum and minimum spectral intensities of the blue light emitted by the first LED chip is less than 30% of the maximum spectral intensity. The spectral intensity of the cyan light emitted by the second LED chip is 40%-70% of the maximum spectral intensity of the blue light emitted by the first LED chip; The spectral intensity of the green light emitted by the third LED chip is 20%-45% of the maximum spectral intensity of the blue light emitted by the first LED chip.

4. The light source module as described in claim 1, characterized in that, The phosphor contains a peak wavelength at 485 nm. 500nm blue-green phosphor.

5. The light source module as described in claim 4, characterized in that, The blue-green phosphor is (Ba,Sr)Si2N2O2:Eu.

6. The light source module as described in claim 1, characterized in that, The phosphor contains a peak wavelength at 500 nm. Yellow-green phosphor at 580nm.

7. The light source module as described in claim 6, characterized in that, The yellow-green phosphor is (Lu,Yb,Tb)3(Al,Ga)5O12:Ce, Y3(Al,Ga)5O12:Ce, Ga One of Y3Al5O12: Ce or (Ba,Sr,Ca,Mg)SiO4: Eu.

8. The light source module as described in claim 1, characterized in that, The first light-emitting unit emits white light with a fixed color temperature of 4000K, while the light source module emits white light with a color temperature adjustable between 5700-20000K, and the color deviation (Duv) from the blackbody radiation is less than 0.

005.

9. The light source module as described in claim 8, characterized in that, When the white light emitted by the light source module has a color temperature in the range of 5700-16000K, the color rendering index (CRI) is greater than 90.

10. The light source module as described in claim 8, characterized in that, The ratio between the white light emitted by the light source module and the black pixel light-sensing efficiency ratio (Kmel) of a standard light source with the same color temperature is greater than 90%.

11. The light source module as described in claim 1, characterized in that, The light source module is a packaged chip. The light source module includes a main body, on which a receiving groove corresponding to the second light-emitting unit is provided. The light source and the phosphor are disposed in the receiving groove. The packaged body fills the receiving groove and covers the light source. The packaged body is mixed with the phosphor.

12. 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 to 11; The driving circuit is electrically connected to the first light-emitting unit and the second light-emitting unit respectively and supplies them with power. The driving circuit controls the current / voltage supplied to the first light-emitting unit and the second light-emitting unit respectively.

13. The lighting system as claimed in claim 12, characterized in that, The driving circuit includes: A power conversion module that converts external power into DC power required by the light source module; The control module generates control signals; The LED driver module receives the DC power output from the power conversion module and the control signal from the control module, adjusts the DC power according to the control signal, and is electrically connected to the first light-emitting unit and the second light-emitting unit respectively, and outputs the adjusted driving current / voltage required by each light-emitting unit.

14. The lighting system as claimed in claim 13, characterized in that, The control signal is a PWM signal.

15. The lighting system as claimed in claim 13, characterized in that, The control module includes a communication module that receives dimming / color adjustment commands from the outside and generates the control signal accordingly.

16. The lighting system as claimed in claim 13, characterized in that, The control module includes a storage module that stores preset control parameter values. The control parameter values ​​are the control parameter values ​​corresponding to the first light-emitting unit and the second light-emitting unit when the light source module generates different color temperatures. The light source module is controlled according to the control parameter values. The white light color temperature emitted by the first light-emitting unit is fixed at 4000K, and the white light color temperature emitted by the light source module is adjustable from 5700 to 20000K, and the color deviation Duv from the blackbody radiation is less than 0.

005.

17. The lighting system as claimed in claim 16, characterized in that, The light source module is controlled according to the control parameter values. When the color temperature of the white light emitted by the light source module is in the range of 5700-16000K, the color rendering index (CRI) is greater than 90.

18. The lighting system as claimed in claim 16, characterized in that, The light source module is controlled according to the control parameter values, and the ratio between the white light emitted by the light source module and the black pixel light sensitivity ratio Kmel of the standard light source with the same color temperature is greater than 90%.

19. The lighting system as claimed in claim 13, characterized in that, The light source includes two or more light source modules, and the first light-emitting unit and the second light-emitting unit in each light source module are connected in series and electrically connected to the LED driver module.

20. A lamp, characterized in that, It includes a light source module as described in any one of claims 1 to 11, or a lighting system as described in any one of claims 12 to 19.

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