A light source module and a lighting device
By introducing a deep red light-emitting unit into the LED light source module to compensate for the deep red light band, and combining it with a white light-emitting unit, a target white light with a high color rendering index is formed, which solves the problem of insufficient color comfort and resolution index of LED light sources, and achieves the effects of high color quality and myopia prevention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OPPLE LIGHTING CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-31
AI Technical Summary
In the pursuit of high color rendering index, existing LED light sources suffer from insufficient color comfort, color resolution index, and spectral fit, resulting in poor visual comfort.
By introducing a deep red light emitting unit into the light source module to compensate for the energy of the deep red light band, and combining it with the first and second white light emitting units, a target white light with a color rendering index higher than 95 is formed, which improves color comfort and color resolution index, and has myopia prevention function.
It achieves high color quality close to the sunlight spectrum, improving color comfort and color resolution index, while also having myopia prevention effects.
Smart Images
Figure CN224580136U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting technology, and in particular to a light source module and a lighting device. Background Technology
[0002] The Color Rendering Index (CRI) is an important parameter for measuring the color rendering ability of a light source. The higher the CRI, the stronger the light source's ability to reproduce the colors of objects. The International Commission on Illumination (CIE) sets the CRI of sunlight at 100. Incandescent lamps have a CRI very close to that of sunlight and are therefore considered an ideal reference light source.
[0003] For a long time, CRI has been the absolute standard for evaluating the color quality of white light. This has led to the pursuit of high CRI levels by compensating for the blue-green spectrum in common LED light sources on the market. Although this is close to the daylight spectrum, it is insufficient in terms of color comfort, color resolution index and spectral fit. In terms of visual perception, the light color is bluish and visual comfort is insufficient.
[0004] Therefore, how to provide a comprehensive, high-color-quality lighting solution that closely approximates sunlight is a pressing technical problem that needs to be solved. Utility Model Content
[0005] The purpose of this invention is to provide a light source module and lighting device that improves color comfort, color resolution index and spectral fit by adding a deep red light emission unit to compensate for the energy of the deep red light band, while also having myopia prevention function.
[0006] To achieve the above objectives, the embodiments of this utility model are implemented as follows:
[0007] Firstly, a light source module is provided, comprising:
[0008] The first white light emitting unit is used to emit first white light of the first color temperature;
[0009] The second white light emitting unit is used to emit second white light of a second color temperature, which is different from the first color temperature.
[0010] Deep red light emitting unit, used to emit deep red light with a wavelength of 650 to 720 nm;
[0011] The first white light, the second white light, and the deep red light are mixed to form the target white light, and the target white light has a color rendering index (CRI) greater than or equal to 95 in the visible light band.
[0012] Optionally, the deep red light emitting unit includes a deep red light emitting chip and a sealing colloid covering the deep red light emitting chip; wherein the deep red light emitting chip includes a first deep red light emitting chip and / or a second deep red light emitting chip; the first deep red light emitting chip is used to emit deep red light with a wavelength of 650 to 690 nm; the second deep red light emitting chip is used to emit deep red light with a wavelength of 690 to 720 nm; when the deep red light emitting chip includes both the first deep red light emitting chip and the second deep red light emitting chip, the ratio of the number of the first deep red light emitting chip to the number of the second deep red light emitting chip is one of 1:1, 2:1, and 1:2.
[0013] Optionally, both the first white light emitting unit and the second white light emitting unit include a blue light emitting chip, a sealing colloid covering the blue light emitting chip, and a phosphor mixture doped in the sealing colloid; wherein the phosphor mixture includes at least one blue-green phosphor with a peak wavelength of 485-515nm, at least one yellow-green phosphor with a peak wavelength of 520-580nm, and at least one red-orange phosphor with a peak wavelength of 615-650nm.
[0014] Optionally, the first color temperature is 2500-3000K, and the second color temperature is 6000-7000K.
[0015] Optionally, the light emitted by the first white light emitting unit and the second white light emitting unit includes at least three spectral emission peaks, with the first spectral emission peak having a wavelength of 430-445 nm, the second spectral emission peak having a wavelength of 445-460 nm, and the third spectral emission peak having a wavelength of 460-475 nm.
[0016] Optionally, the target white light has a color comfort index (MCPI) greater than or equal to 80 in the visible light band and a color resolution index (CDM) greater than or equal to 85.
[0017] Optionally, the light source module is a dual-module structure, wherein one module structure includes the first white light emitting unit and the second white light emitting unit, and the other module structure includes the deep red light emitting unit; or, the light source module is a single-module structure, wherein the single-module structure simultaneously includes the first white light emitting unit, the second white light emitting unit, and the deep red light emitting unit.
[0018] Secondly, a lighting device is provided, comprising:
[0019] The light source module mentioned in the first aspect above;
[0020] A power conversion module is used to convert external power into DC power required by the light source module;
[0021] The control module is used to generate control commands that include pulse width modulation signals.
[0022] The LED control chip is used to receive the DC power supply provided by the power conversion module and the control signal provided by the control module, and adjust the DC power supply according to the control signal to output the driving current / voltage required for operation to the first white light emitting unit, the second white light emitting unit and the deep red light emitting unit in the light source module.
[0023] Optionally, the first white light emitting unit, the second white light emitting unit, and the deep red light emitting unit each have a pulse width modulation signal with an adjustable duty cycle.
[0024] Optionally, at least a portion of the light source modules in the lighting device are packaged in an integrated COB package or in a separate independent module package.
[0025] This invention introduces a deep red light-emitting unit on top of a white light-emitting unit to enhance the energy of the deep red light band. This results in a light spectrum that closely approximates sunlight (color rendering index greater than or equal to 95), while also improving color comfort, color resolution, and spectral fit. This comprehensively improves the color quality of the light source, solving the problem of bluish and glaring light from traditional LED light sources. Furthermore, deep red light has the effect of inhibiting abnormal elongation of the eye axis, thus achieving myopia prevention and control. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this 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 the embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a first structural schematic diagram of the light source module according to an embodiment of the present utility model.
[0028] Figure 2 This is a schematic diagram of the second structure of the light source module in an embodiment of the present invention.
[0029] Figure 3 This is a first schematic diagram of the emission spectrum of the light source module in an embodiment of the present invention.
[0030] Figure 4 This is a second schematic diagram of the emission spectrum of the light source module in an embodiment of the present invention.
[0031] Figure 5This is a third schematic diagram of the emission spectrum of the light source module in an embodiment of the present invention.
[0032] Figure 6 This is a fourth schematic diagram of the emission spectrum of the light source module in an embodiment of the present invention.
[0033] Figure 7 This is the fifth schematic diagram of the emission spectrum of the light source module in an embodiment of the present invention.
[0034] Figure 8 This is a schematic diagram comparing the emission spectrum of the light source module in this embodiment with the spectrum of the D-series standard light source.
[0035] Figure 9 This is a schematic diagram of the second structure of the light source module in an embodiment of the present invention.
[0036] Figure 10 This is a schematic diagram of the structure of the lighting device according to an embodiment of the present utility model.
[0037] Figure 11 This is a schematic diagram of the packaging method of the light source module in the lighting device according to an embodiment of the present utility model. Detailed Implementation
[0038] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0039] Based on the foregoing, the common LED light sources on the market currently pursue high CRI levels by compensating for the blue-green spectrum. Although this is close to the sunlight spectrum, it is insufficient in terms of color comfort, color resolution index and spectral fit. In terms of visual perception, the light color is bluish and visual comfort is insufficient.
[0040] To address the aforementioned issues, this utility model provides a lighting solution involving a light source module and a lighting device. It aims to improve color comfort, color resolution index, and spectral fit by incorporating a deep red light-emitting unit to compensate for the energy of the deep red light band, while also providing myopia prevention and control functions.
[0041] Before introducing the present invention, some important indicators in the field of lighting will be introduced.
[0042] 1) Standard light source spectrum
[0043] Color temperature ≥ 4000K: The relative spectral distribution of the D-series standard light source specified by the International Commission on Illumination is used as the target spectrum, such as D50, D65, etc.
[0044] 2) Spectral Fitting Ratio (SFR)
[0045] Spectral fit is used to evaluate the degree of fit between the measured spectrum and the target spectrum. This is based on the Average Spectral Difference (ASD) value published by Bridgelux Inc., USA, to calculate the spectral deviation ratio. The reference light source spectrum 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 spectrum is based on the D-series standard illuminator. When the color temperature is below 4000K, the spectrum emitted by a blackbody radiation source is used as the 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 illuminator is used as the reference. Furthermore, considering the band distribution of human visual response, the evaluation range of spectral deviation is limited to between 425nm and 690nm. The specific calculation method is as follows:
[0046]
[0047] in, The relative intensity of the reference light source; The relative intensity of the light source to be evaluated; λ is the wavelength.
[0048] 3) Red Ratio (Rr)
[0049] The red light ratio represents the proportion of illuminance in the measured spectrum between 620 nm and 650 nm, based on a fixed light source illuminance of 100 lux.
[0050] 4) Deep-Red Ratio (DRr)
[0051] The deep red light ratio represents the proportion of illuminance in the measured spectrum between 650 nm and 690 nm in the deep red light band, based on a fixed light source illuminance of 100 lux.
[0052] 5) Color Preference Index (MCPI based on Meta-analysis)
[0053] Color comfort represents the ability of a light source to meet an observer's color preferences under one or more specific application conditions. In other words, this index can be used to scientifically evaluate which light source's color rendering effect better meets the needs of visual perception. The corresponding calculation formula is:
[0054]
[0055] in, CQS stands for Light Source Fidelity Index; Qa stands for Color Quality Standard; Qa is the output index of CQS. Color discrimination is an indicator of light intensity, which is based on absolute color gamut and is used to evaluate the color discrimination ability of a light source.
[0056] 6) Color Discrimination Metric (CDM)
[0057] The color resolution index represents the degree to which an observer can distinguish color differences under different light sources. It characterizes the human eye's ability to differentiate the color, brightness, and saturation of objects under different light sources. The corresponding calculation formula is:
[0058]
[0059] in, The whiteness index prediction model for light source is calculated in the CIE1976 UCS uniform color space. The colorimetric index is a measure of the amount of hue misalignment caused by a test light source. It is calculated by using the CIE C standard light source as a practical reference and calculating based on the hue misalignment score.
[0060] On the one hand, embodiments of this utility model provide a light source module. Figure 1 This is a schematic diagram of the structure of the light source module, including:
[0061] The first white light emitting unit 100 is used to emit first white light of the first color temperature;
[0062] The second white light emitting unit 200 is used to emit second white light of a second color temperature, which is different from the first color temperature;
[0063] The deep red light emitting unit 300 is used to emit deep red light with a wavelength of 650 to 720 nm;
[0064] Among them, the first white light, the second white light and the deep red light are mixed to form the target white light, and the color rendering index (CRI) of the target white light in the visible light band is greater than or equal to 95.
[0065] In this embodiment, the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300 all emit light through a light-emitting chip.
[0066] The first white light emitting unit 100 and the second white light emitting unit 200 mainly include a blue light emitting chip, a sealing colloid covering the blue light emitting chip, and a phosphor mixture doped in the sealing colloid. The phosphor mixture includes at least one blue-green phosphor with a peak wavelength of 485-515 nm, at least one yellow-green phosphor with a peak wavelength of 520-580 nm, and at least one red-orange phosphor with a peak wavelength of 615-650 nm. As an example, the blue-green phosphor can be (Ba,Sr)Si2N2O2:Eu; the yellow-green phosphor can be one or more of (Lu,Yb,Tb)3(Al,Ga)5O12:Ce, Y3(Al,Ga)5O12:Ce, Ga-Y3Al5O12:Ce, and (Ba,Sr,Ca,Mg)SiO4:Eu; and the red-orange phosphor can be one or more of CaAlSiN3:Eu, (Ca,Sr)AlSiN3:Eu, (Ba,Sr,Ca,Mg)2Si5N8:Eu, K2SiF6:Mn4+, K2GeF6:Mn4+, and K2TiF6:Mn4+.
[0067] In relevant lighting applications, the first white light emitting unit 100 has a primary color temperature of 2500-3000K, and the second white light emitting unit 200 has a secondary color temperature of 6000-7000K. The light emitted by the first white light emitting unit 100 and the second white light emitting unit 200 includes at least three spectral emission peaks: the first spectral emission peak has a wavelength of 430-445nm, the second spectral emission peak has a wavelength of 445-460nm, and the third spectral emission peak has a wavelength of 460-475nm.
[0068] In addition, the deep red light emitting unit 300 mainly includes a deep red light emitting chip and a sealing colloid covering the deep red light emitting chip.
[0069] In the encapsulation scheme of the first white light emitting unit 100 and the second white light emitting unit 200, the increase in blue energy helps to improve the whiteness of the light source, indirectly increasing the contrast between the colors of different illuminated objects, thereby improving the color resolution of the light source; in addition, with blue and red remaining basically unchanged, the decrease in green energy (including yellow) will help to improve color preference and resolution.
[0070] Furthermore, the deep red light-emitting chip can include various specifications and be combined in any proportion (ensuring a wavelength of 650 to 720 nm can be provided). As an example, the deep red light-emitting chip includes at least a first deep red light-emitting chip and / or a second deep red light-emitting chip. The first deep red light-emitting chip is used to emit deep red light with a wavelength of 650 to 690 nm; the second deep red light-emitting chip is used to emit deep red light with a wavelength of 690 to 720 nm.
[0071] The light source module of this embodiment will be described below with reference to its specific implementation method.
[0072] In this embodiment, the first white light emitting unit 100 is a full-spectrum LED with a color temperature of 2700K, and the second white light emitting unit 200 is a full-spectrum LED with a color temperature of 6500K. The corresponding parameters are shown in the table below:
[0073]
[0074] The R9 and R12 mentioned above are special indicators subdivided under CRI. R9 represents saturated red, and R12 represents saturated blue. Taking R9 as an example, the higher the R9 value, the stronger the light source's ability to reproduce red. Its importance lies in its direct impact on the display effect of red objects, which is especially important for application scenarios that require high red reproduction (such as displaying red cultural relics in museums, highlighting the colors of meat and fruit in fresh food supermarkets, etc.).
[0075] In addition, the deep red light emitting unit 300 includes two specifications of deep red light emitting chips, namely the first deep red light emitting chip and the second deep red light emitting chip mentioned above. The corresponding references for the first deep red light emitting chip and the second deep red light emitting chip in different proportions are shown in the table below:
[0076]
[0077] Under the parameter specifications of the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300 mentioned above, Figure 3 The corresponding emission spectrum distribution is illustrated. The horizontal axis represents wavelength, and the vertical axis represents energy.
[0078] As can be seen from the foregoing, in this embodiment, the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300 mix to form the final target white light.
[0079] Taking a target white light with a color temperature of 3000K as an example, the emission spectrum distribution after light mixing is as follows: Figure 4 As shown in the table below, the relevant lighting parameters are as follows:
[0080]
[0081] Taking a target white light with a color temperature of 4000K as an example, the emission spectrum distribution after light mixing is as follows: Figure 5 As shown in the table below, the relevant lighting parameters are as follows:
[0082]
[0083] Taking a target white light with a color temperature of 5000K as an example, the emission spectrum distribution after light mixing is as follows: Figure 6 As shown in the table below, the relevant lighting parameters are as follows:
[0084]
[0085] Taking a target white light with a color temperature of 5700K as an example, the emission spectrum distribution after light mixing is as follows: Figure 7 As shown in the table below, the relevant lighting parameters are as follows:
[0086]
[0087] Furthermore, the original example represents a traditional light source module, while the comparative example represents the light source module of this embodiment. The specific lighting parameters are compared in the table below:
[0088]
[0089] As can be seen from the table above, this embodiment, compared to traditional light source modules, improves the spectral fit by adding deep red light energy at the cost of sacrificing only a small portion of the color rendering index (the physical data may be reduced), and finally achieves the light source's preference and resolution (seemingly improving the visual perception effect). The proportion of deep red light is also increased (due to the addition of visual protection elements).
[0090] Here, we use Example 4b at a color temperature of 4000K as the target example for discussing the conclusions. A comparison is made between the emission spectral distribution of Example 4b after light mixing and the spectrum of the D-series standard light source. Figure 8 As shown. Based on Figure 8As can be seen, this embodiment effectively expands the absolute color gamut covered by the light source by adding deep red energy, resulting in better color quality. The overall increase in red energy also helps improve the comfort of the light source's color. The combination of these two factors enhances the light source's color preference for illuminated objects. Furthermore, the increase in blue energy also helps improve the whiteness of the light source, indirectly increasing the contrast between different illuminated object colors, thereby improving the light source's color resolution. On the other hand, it can also be understood that while blue and red remain essentially unchanged, the decrease in green energy (including yellow) will help improve color preference and resolution. However, due to the above points, its spectral distribution will deviate from the standard spectrum, resulting in a relative decrease in the color rendering index. Compared to a typical full-spectrum white LED light source, the proportion of deep red light in this embodiment is significantly increased, which further improves the similarity of its spectrum to the D-series standard light source spectrum (generally understood as the daylight spectrum).
[0091] Overall, the comparison between the emission spectrum of the light source module in this embodiment and the emission spectrum of a traditional light source module is shown in the table below:
[0092]
[0093] That is, the CRI of the target white light generated in this embodiment is basically maintained above 95, and the color comfort index MCPI is greater than or equal to 80, and the color resolution index CDM is greater than or equal to 85.
[0094] It should be noted that, Figure 1 The light source module shown is for illustrative purposes only and is not intended to limit the layout of a specific module structure. In relevant applications, refer to... Figure 9 As shown, the light source module of this embodiment can be a dual-module structure, where one module includes a first white light emitting unit 100 and a second white light emitting unit 200, and the other module includes a deep red light emitting unit 300. Alternatively, the light source module of this embodiment can also be a single-module structure, which simultaneously includes the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300.
[0095] In addition, another embodiment of this utility model provides a lighting device. Figure 10 This is a schematic diagram of the lighting device, including:
[0096] Multiple of the aforementioned light source modules 10;
[0097] The power conversion module 20 is used to convert external power into DC power required by the light source module 10; wherein, Figure 10 In the diagram, L represents the live wire of the external power supply, and N represents the neutral wire of the external power supply.
[0098] Control module 30 is used to generate control commands that include pulse width modulation (PWM) signals;
[0099] LED control chip 40 is used to receive DC power from power conversion module 20 and control signal from control module 30, and adjust DC power according to control signal to output driving current / voltage required for operation to the first white light emitting unit 100, the second white light emitting unit 200 and the deep red light emitting unit 300 in light source module 10.
[0100] It should be noted that the DC power supplied to the power conversion module 20 and the current / voltage supplied to the light source module to drive the light emission are functions that can be achieved by existing LED control chips. This embodiment does not involve any program improvements to the LED control chip.
[0101] Optionally, the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300 in the light source module 10 are independently controlled by the LED control chip 40. The control signal is a PWM signal with an adjustable duty cycle for each of the first white light emitting unit 100, the second white light emitting unit 200, and the deep red light emitting unit 300. PWM is a periodic square wave signal that changes the average power output of each light emitting unit by adjusting the high-level time (duty cycle). The duty cycle refers to the percentage of the high-level time in the entire cycle; the higher the duty cycle, the stronger the LED brightness.
[0102] The lighting device in this embodiment is the first to use a three-color light-emitting system. Based on two white light emitting units, a deep red light emitting unit is introduced to enhance the energy of the deep red light band (650-700nm), thereby achieving comprehensive optimization of CRI, MCPI, and CDM (MCPI improvement ≥15%, CDM improvement ≥10%). In addition, deep red light has the effect of inhibiting abnormal elongation of the eye axis, thereby achieving myopia prevention and control.
[0103] In practical applications, the lighting device in this embodiment can be various types of lamps, such as chandeliers and ceiling lights, etc., which are not specifically limited here. In addition, it can also include controllers, heat dissipation devices, and light distribution components, depending on the function and requirements of the specific lamp. The controller can be used to adjust the color and intensity of the light emitted by the light source module, while the light distribution components, in addition to the diffuser plate in the embodiment, can also be lampshades, lenses, diffusion elements, light guides, etc.
[0104] Furthermore, this embodiment does not specifically limit the overall packaging method of the above-mentioned multiple light source modules 10, but refers to... Figure 11As shown, at least some of the light source modules 10 in the lighting device can be integrated into a COB package or be packaged as separate independent modules.
[0105] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0106] In the embodiments provided by this utility model, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0107] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also 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 process, method, article, or apparatus. Unless otherwise specified, 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 the element.
[0108] The above are merely embodiments of this disclosure and are not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of the claims of this disclosure.
Claims
1. A light source module, characterized by include: The first white light emitting unit is used to emit first white light of the first color temperature; The second white light emitting unit is used to emit second white light of a second color temperature, which is different from the first color temperature. Deep red light emitting unit, used to emit deep red light with a wavelength of 650 to 720 nm; The first white light, the second white light, and the deep red light are mixed to form the target white light, and the target white light has a color rendering index (CRI) greater than or equal to 95 in the visible light band.
2. The light source module according to claim 1, characterized in that, The deep red light emitting unit includes a deep red light emitting chip and a sealing colloid covering the deep red light emitting chip; The deep red light-emitting chip includes a first deep red light-emitting chip and / or a second deep red light-emitting chip; the first deep red light-emitting chip is used to emit deep red light with a wavelength of 650 to 690 nm; the second deep red light-emitting chip is used to emit deep red light with a wavelength of 690 to 720 nm; when the deep red light-emitting chip includes both the first deep red light-emitting chip and the second deep red light-emitting chip, the ratio of the number of the first deep red light-emitting chip to the number of the second deep red light-emitting chip is one of 1:1, 2:1, and 1:
2.
3. The light source module according to claim 1, characterized in that, Both the first white light emitting unit and the second white light emitting unit include a blue light emitting chip, a sealing colloid covering the blue light emitting chip, and a phosphor mixture doped in the sealing colloid; The phosphor mixture includes at least one blue-green phosphor with a peak wavelength of 485-515 nm, at least one yellow-green phosphor with a peak wavelength of 520-580 nm, and at least one red-orange phosphor with a peak wavelength of 615-650 nm.
4. The light source module according to claim 3, characterized in that, The first color temperature is 2500-3000K, and the second color temperature is 6000-7000K.
5. The light source module according to claim 3, characterized in that, The light emitted by the first white light emitting unit and the second white light emitting unit includes at least three spectral emission peaks: the first spectral emission peak has a wavelength of 430-445 nm, the second spectral emission peak has a wavelength of 445-460 nm, and the third spectral emission peak has a wavelength of 460-475 nm.
6. The light source module according to claim 3, characterized in that, The target white light has a color comfort index (MCPI) greater than or equal to 80 in the visible light band and a color resolution index (CDM) greater than or equal to 85.
7. The light source module according to claim 3, characterized in that, The light source module has a dual-module structure, one module includes the first white light emitting unit and the second white light emitting unit, and the other module includes the deep red light emitting unit; Alternatively, the light source module may be a single-module structure, which may include the first white light emitting unit, the second white light emitting unit, and the deep red light emitting unit.
8. An illumination device, characterized by include: Multiple light source modules as described in any one of claims 1-7; A power conversion module is used to convert external power into DC power required by the light source module; The control module is used to generate control commands that include pulse width modulation signals; The LED control chip is used to receive the DC power supply provided by the power conversion module and the control signal provided by the control module, and adjust the DC power supply according to the control signal to output the driving current / voltage required for operation to the first white light emitting unit, the second white light emitting unit and the deep red light emitting unit in the light source module.
9. The lighting device according to claim 8, characterized in that, The first white light emitting unit, the second white light emitting unit, and the deep red light emitting unit each have their own pulse width modulation signal with adjustable duty cycle.
10. The lighting device according to claim 8, characterized in that, At least a portion of the light source modules in the lighting device are packaged using integrated COB packaging or using separate independent module packaging.