A light source module and a lighting device including the light source module

Abstract

A light source module and a lighting device including the light source module, comprising a first light-emitting element and a packaging part covering the first light-emitting element, the packaging part including: a first phosphor and a second phosphor. The emitted light of the light source module is within the interval enclosed by points with a distance duv = -0.005 to 0.005 from the blackbody locus at a correlated color temperature of 1450 to 1750K in the CIE1931 color space. The light source module and the lighting device provided by the present invention emit LED lighting fixtures with similar thermal radiation, continuous emission spectra, and low blue light. Their light color is warm yellow, and the spectral distribution within the range of 380 to 660nm has a high similarity to the thermal radiation spectrum. Therefore, they have a low M / P value and can promote falling asleep quickly.

Description

Technical Field

[0001] The present invention relates to a light source module and a lighting device including the light source module. Background Art

[0002] With the advent and development of the third lighting technology revolution, incandescent lamps, halogen lamps, etc. have gradually been prohibited from production and sales in various countries around the world due to low luminous efficiency and energy inefficiency, and LED lighting appliances have replaced them and have been widely used. With the development of LED lighting applications, the research on it is not only limited to aspects such as energy conservation, illuminance, color, and color rendering, but studying the impact of LED light emission on the human body has become a trend, and the concept of healthy lighting has gradually entered ordinary families.

[0003] Currently, in the common market for home environments, for LED lamps used at night or before going to bed, LEDs with 2700K and 3000K are mainly used, and their light color is warm white. Although this light color has approached that of incandescent lamps as much as possible, it still differs greatly from the light color of incandescent lamps and cannot give people a warm and comfortable feeling. In addition, the warm white light provided on the market currently is only warm in color temperature and cannot promote falling asleep quickly. Therefore, providing an LED light source suitable for people to use at night that can promote falling asleep while realizing the lighting function is the problem to be solved by the present invention. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and find a light source module suitable for night use and capable of promoting falling asleep, and a lighting device including the light source module.

[0005] To achieve the above functions, the technical solution adopted by the present invention is to provide a light source module, which is characterized in that it includes a first light-emitting element and a packaging part covering the first light-emitting element.

[0006] The first light-emitting element emits first color light with a peak wavelength located between 390 nm and 470 nm.

[0007] The packaging part includes:

[0008] A first phosphor, which is arranged to emit second color light with a peak wavelength located between 520 nm and 560 nm after being excited by the first color light.

[0009] A second phosphor, which is arranged to emit third color light with a peak wavelength located between 610 nm and 660 nm and a half-width of 80 nm to 100 nm after being excited by the first color light.

[0010] The first color light, the second color light, and the third color light are mixed to form the emitted light of the light source module. On the CIE1931 color space, the emitted light is located within the interval enclosed by points where the correlated color temperature is 1450 - 1750K and the distance duv from the blackbody locus is -0.005 - 0.005.

[0011] Preferably, the first light-emitting element is an LED chip; the first phosphor is a green phosphor, a yellow phosphor, or a phosphor combination containing at least one of a green phosphor and a yellow phosphor; the second phosphor is a red phosphor, an orange phosphor, or a phosphor combination containing at least one of a red phosphor and an orange phosphor.

[0012] Preferably, the weight ratio of the second phosphor to the first phosphor is 10% - 60%.

[0013] Preferably, the encapsulation part further includes a base material. After the first phosphor, the second phosphor, and the base material are uniformly mixed, they are coated on the first light-emitting element.

[0014] Preferably, the base material is transparent silicone or transparent resin, and the weight ratio of the sum of the weights of the first phosphor and the second phosphor to the weight of the base material is 50% - 120%.

[0015] Preferably, the encapsulation part further includes a light diffusing agent, which is one of nano-titanium oxide, alumina, or silicon oxide, and the weight ratio of the light diffusing agent to the base material is less than 3.0%.

[0016] Preferably, the green phosphor and the yellow phosphor are aluminate-based phosphors with chemical formulas Y3Al5O 12 :Ce 3+ 、Lu3Al5O 12 :Ce 3+ 、Y3(Al,Ga)5O 12 :Ce 3+ 、Tb3Al5O 12 :Ce 3+ ;

[0017] Or they are silicate-based phosphors with chemical formulas (Ca,Sr,Ba)2(Mg,Zn)Si2O7:Eu 2+ 、(Ca,Sr,Ba)2MgSi3O5:Eu 2+ 、β-(Sr,Ba,Ca)2SiO4:Eu 2+ 、α-(Sr,Ba,Ca)2SiO4:Eu 2+ ;

[0018] Or it is a nitrogen oxide system phosphor with the chemical formula β-(Sr,Ca)SiAlON:Eu 2+ , α-(Sr,Ca)SiAlON:Eu 2 + .

[0019] Preferably, the red phosphor and the orange phosphor are nitride system phosphors with the chemical formulas (Sr,Ba)2Si5N8:Eu 2+ , (Sr,Ca,Ba)SiAlN3:Eu 2+ .

[0020] Preferably, the light color of the emitted light is within the ellipse range with the center point x0 = 0.571, y0 = 0.402, major axis a = 0.00229, minor axis b = 0.00129, inclination angle θ = 38.7°, and SDCM = 5.0 in the CIE1931 color space.

[0021] Preferably, in the emission light spectrum, a first peak is formed within the range greater than 610 nm, and a second peak is formed within the range of 390 - 470 nm, and the peak intensity of the second peak is less than or equal to 12.0% of the peak intensity of the first peak.

[0022] Preferably, the ratio M / P of the scotopic illuminance M to the photopic illuminance P of the emission light spectrum within the visible light range is ≤ 0.20.

[0023] Preferably, the similarity S of the emission light spectrum within the range of 380 - 660 nm compared with the blackbody radiation spectrum of the same color temperature and the same brightness is ≥ 78%.

[0024] The present invention also provides an illumination device including the above light source module.

[0025] The present application provides an LED lighting fixture that emits similar thermal radiation, has a continuous emission spectrum, and low blue light, and its light color is warm yellow. The spectrum has a high similarity with the thermal radiation spectrum distribution within the range of 380 - 660 nm, so it has a low M / P value and can promote falling asleep quickly. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;

[0027] Figure 2 is a CIE1931 color coordinate diagram according to preferred embodiments 1 - 7 of the present invention;

[0028] Figure 3 is a spectrum comparison diagram of preferred embodiment 1 of the present invention and the prior art;

[0029] Figure 4 It is the relative spectral energy distribution diagram of the preferred Embodiment 1 in the present invention;

[0030] Figure 5 It is the comparison diagram between the preferred Embodiment 1 in the present invention and the reference spectrum;

[0031] Figure 6 It is the relative spectral energy distribution diagram of the preferred Embodiment 2 in the present invention;

[0032] Figure 7 It is the comparison diagram between the preferred Embodiment 2 in the present invention and the reference spectrum;

[0033] Figure 8 It is the relative spectral energy distribution diagram of the preferred Embodiment 3 in the present invention;

[0034] Figure 9 It is the comparison diagram between the preferred Embodiment 3 in the present invention and the reference spectrum;

[0035] Figure 10 It is the relative spectral energy distribution diagram of the preferred Embodiment 4 in the present invention;

[0036] Figure 11 It is the comparison diagram between the preferred Embodiment 4 in the present invention and the reference spectrum;

[0037] Figure 12 It is the relative spectral energy distribution diagram of the preferred Embodiment 5 in the present invention;

[0038] Figure 13 It is the comparison diagram between the preferred Embodiment 5 in the present invention and the reference spectrum;

[0039] Figure 14 It is the relative spectral energy distribution diagram of the preferred Embodiment 6 in the present invention;

[0040] Figure 15 It is the comparison diagram between the preferred Embodiment 6 in the present invention and the reference spectrum;

[0041] Figure 16 It is the relative spectral energy distribution diagram of the preferred Embodiment 7 in the present invention;

[0042] Figure 17 It is the comparison diagram between the preferred Embodiment 7 in the present invention and the reference spectrum;

[0043] Figure 18 It is the structural schematic diagram of the preferred embodiment lamp in the present invention. Detailed implementation manners

[0044] The following further describes in detail a light source module and a lighting device proposed by the present invention in conjunction with the accompanying drawings and some preferred embodiments that conform to the present invention.

[0045] A specific embodiment of the light source module L1 of the present invention is a white light LED packaging chip with mixed light, which can be an LED chip with a general surface mount packaging structure or a COB packaging structure such as Figure 1 shown. The light source module L1 includes at least one first light emitting element 1 and a packaging part 2 covering the first light emitting element.

[0046] The first light emitting element 1 is a blue light LED chip, which emits light directly excited by a semiconductor material. The peak wavelength of its emission is located in the range of 390 - 470 nm, and the light color is purple or blue. Here, we call the light emitted by the first light emitting element 1 the first color light. The LED chip (LED Chip) includes a front-mounted or flip-chip structure, and single or multiple LED Chips are connected in series, parallel, or series-parallel.

[0047] The packaging part 2 uses transparent silicone or transparent resin as the base material 204, and the transparent resin can be selected from one of epoxy resin and urea resin. The base material 204 is doped with a first phosphor 201 and a second phosphor 202.

[0048] Among them, the first phosphor 201 is a green phosphor or a yellow phosphor containing at least one peak wavelength in the range of 520 - 560 nm, that is, the first phosphor 201 receives part of the light emitted by the first light emitting element 1 and converts it into a second color light with a peak wavelength in the range of 520 - 580 nm. Since color is an intuitive human perception and it is impossible to precisely divide the spectral boundaries between yellow and green, here we consider that the green phosphor and the yellow phosphor only have a difference in the name used, and the two basically have the same chemical general formula, and the difference lies only in the molar ratio of the components therein. In the present application, the first phosphor 201 can be a single yellow phosphor or green phosphor, or multiple yellow phosphors or green phosphors with peak wavelengths in the range of 520 - 560 nm can be mixed to be used as the first phosphor 201. The green phosphor and the yellow phosphor can be aluminate-based phosphors, with the chemical formula Y3Al5O 12 :Ce 3+ 、Lu3Al5O 12 :Ce 3+ 、Y3(Al,Ga)5O 12 :Ce 3+ 、Tb3Al5O 12 :Ce 3+ ; or silicate-based phosphors, with the chemical formula (Ca,Sr,Ba)2(Mg,Zn)Si2O7:Eu 2+ 、(Ca,Sr,Ba)2MgSi3O5:Eu 2+ 、β-(Sr,Ba,Ca)2SiO4:Eu2+ 、 α-(Sr, Ba, Ca)2SiO4:Eu 2+ ; or a nitrogen oxide system phosphor with the chemical formula β-(Sr, Ca)SiAlON:Eu 2+ 、 α-(Sr, Ca)SiAlON:Eu 2+ . The above molecular formulas are basic molecular formulas. In the actual application of the phosphor, the molar ratio is not very precise. Different molar ratios will affect the peak wavelength of the phosphor, which is understandable to those skilled in the art.

[0049] The second phosphor 202 is a red phosphor or an orange phosphor containing at least one peak wavelength in the range of 610 - 660 nm, that is, the second phosphor 202 receives part of the light emitted by the first light-emitting element 1 and converts it into a third color light with a peak wavelength in the range of 610 - 660 nm, preferably in the range of 630 - 660 nm, and a half-width of 80 - 100 nm. In this application, the second phosphor 202 can be a single red phosphor or orange phosphor, or multiple red phosphors or orange phosphors with peak wavelengths in the range of 520 - 560 nm can be mixed to be used as the second phosphor 202. The red phosphor and the orange phosphor are nitride system phosphors with the chemical formula (Sr, Ba)2Si5N8:Eu 2+ 、(Sr, Ca, Ba)SiAlN3:Eu 2+ .

[0050] The encapsulation part 2 can also include a light diffusing agent 203, and the light diffusing agent can be one of nano titanium oxide, alumina or silica. In this embodiment, the weight ratio of the sum of the weights of the first phosphor 201 and the second phosphor 202 to the base material 204 is 50% - 120%, where the weight ratio of the second phosphor 202 to the first phosphor 201 is 10% - 60%, preferably 25% - 40%. The weight ratio of the light diffusing agent 203 to the base material 204 is less than 3.0%. After weighing the above various phosphors and the light diffusing agent in proportion and mixing them into the base material 204, and then fully stirring them evenly on a mixer, the phosphors and the light diffusing agent are evenly distributed in the base material 204. After removing the bubbles, the base material 204 mixed with the phosphors is covered above the LED chip serving as the first light-emitting element 1 by using a dispensing machine to form the encapsulation part 2.

[0051] After the encapsulation of the light source module L1, the emitted light thereof is composed of the first color light emitted by the first light-emitting element 1, the second color light emitted by the first phosphor 201, and the third color light emitted by the second phosphor 202. The color temperature of the emitted light of the light source module L1 proposed in this application is 1450K to 1750K, and the distance Duv between it and the blackbody locus BBL on the CIE1931 chromaticity diagram is between [-0.005, 0.005], and in Figure 2 it is represented as area A2. More preferably, the light color of the emitted light is within the ellipse range with the center point x0 = 0.571, y0 = 0.402, major axis a = 0.00229, minor axis b = 0.00129, inclination angle θ = 38.7°, and SDCM = 5.0 on the CIE1931 color space, and in Figure 2 it is represented as area A1.

[0052] The emitted light of the light source module L1 also has the following characteristics. The maximum value of the spectral intensity of the emitted light is located in the range greater than 610nm, that is, a first peak is formed in the red light section; in the range of 390 - 470nm of the emitted light spectrum, that is, a second peak is formed in the blue light section, where the peak intensity of the second peak is less than or equal to 12.0% of the peak intensity of the first peak, and preferably less than or equal to 8.0% of the peak intensity of the first peak. Such a spectral distribution, as shown in Figure 3 compared with the typical warm white light in the prior art, has less blue light energy, a yellowish light color, and is more suitable for night use.

[0053] At the same time, the emitted light spectrum of the light source module L1 is continuous and is very close to the blackbody radiation spectrum with the same color temperature and the same brightness in the range of 380 - 660nm. To illustrate this similarity, this application defines the similarity S as follows:

[0054]

[0055] A(λ) is the spectral distribution of the emitted light;

[0056] P(λ) is the blackbody radiation spectral distribution with the same color temperature as the emitted light.

[0057] The similarity S between the emitted light of the light source module L1 and the blackbody radiation spectrum with the same color temperature and the same brightness is S≥78%, and preferably the similarity S≥85%.

[0058] For the emitted light of the light source module L1, the ratio M / P of the scotopic illuminance to the photopic illuminance is M / P ≤ 0.20, and preferably M / P ≤ 0.16. The light color with the above characteristics can promote falling asleep quickly. Traditionally, it is considered that there are two types of photoreceptor cells in the retina of our eyes. One type of photoreceptor cell can distinguish the brightness of light, and the other can distinguish colors. In bright places, only cone cells in the photoreceptor cells are active, and when looking at objects in this state, it is called photopic vision. The curve that divides the sensitivity of cone cells by spectral frequency is called the photopic luminous efficiency curve. Nowadays, scientists believe that there is also a third type of photoreceptor cell in the retina - intrinsically photosensitive retinal ganglion cells (ipRGCs). Intrinsically photosensitive retinal ganglion cells (ipRGCs) are responsible for sensing the light intensity and transmitting signals to the pineal gland. And the pineal gland in the human brain will secrete a hormone: melatonin, which is the "natural sleeping pill" and is the "rest signal" spontaneously generated by our body. When the melatonin content in the body is relatively high, we will feel drowsy; when the melatonin content is low, we will be awake and energetic. The curve that divides the sensitivity of ipRGCs by spectral frequency is called the scotopic luminous efficiency curve.

[0059] The specific formula for the ratio M / P of the scotopic illuminance to the photopic illuminance is as follows:

[0060]

[0061] A(λ) is the spectral distribution of the emitted light;

[0062] Mel(λ) is the scotopic luminous efficiency curve;

[0063] V(λ) is the photopic luminous efficiency curve.

[0064] The above describes a specific implementation manner of the present application. Below, several specific embodiments adopting this implementation manner are exemplified. Table 1 shows 6 embodiments of the present application, as well as the selection of the first light-emitting element 1, the first additional light-emitting body 201, and the second additional light-emitting body 202 in each embodiment and the peak wavelength of the light generated by them. The table also indicates the weights of parts such as phosphor light, diffusing agent 203, and base material 204.

[0065] Table 1

[0066]

[0067] As can be seen from Table 1, for the first light-emitting element 1, all 6 embodiments provided by the present application use blue light chips, but the peak wavelengths of the chips selected in each embodiment are different. The first phosphor 201 in Embodiments 1 to 4 is an aluminate-structured yellow phosphor, and the molecular formula is Y3Al5O 12 :Ce 3+, although they have the same molecular formula, the models selected in Example 1 are different from those in Examples 2 to 4, so their peak wavelengths are also different. Example 5 is an aluminate-structured green phosphor with the molecular formula Y3(Al,Ga)5O 12 :Ce 3+ , with a peak wavelength of 535 nm. Example 5 is an aluminate-structured green phosphor with the molecular formula Lu3Al5O 12 :Ce 3+ , with a peak wavelength of 535 nm. The second phosphor 202 in Examples 1 to 6 is the same type of nitride-based red phosphor with the molecular formula (Sr,Ca,Ba)SiAlN3:Eu 2+ , and the emission peak wavelengths are different, which are respectively marked as No. 1, No. 2, and No. 3 in the table. In Examples 1 to 4, nano-TiO2 is used as the light diffusing agent, while in Examples 5 and 6, no light diffusing agent is added.

[0068] The weights of the phosphors in the examples in Table 1 are the data when we made the sample chips of the light source module L1. In actual mass production, due to different batches of phosphors, the weights will vary slightly. However, to ensure the specific light color and spectral characteristics proposed in this application, its basic proportion is within a fixed range. In Table 1, wt2 / wt1 represents the weight ratio of the second phosphor 202 to the first phosphor 201. In the table, its ratio is basically in the range of 30% - 35%. Considering different batches of phosphors, the actual range may expand to 25% - 40%. If phosphors of different types from the examples are selected, the total ratio range may expand to 10% - 60%. Generally speaking, however, the red and orange phosphors as the second phosphor 202 are less than the yellow and green phosphors as the first phosphor 201. (wt1 + wt2) / wt3 represents the weight ratio of the sum of the weights of the first phosphor 201 and the second phosphor 202 to the weight of the substrate material 204. The values in the table are basically between 90% and 100%. Similarly, considering different types of phosphors, the actual range may expand to 50% - 120%.

[0069] In addition to the above examples, this application also provides another preferred embodiment. In this embodiment, the light source module L1 includes, in addition to a red or orange phosphor, a red light LED chip. The phosphor and the chip act together to enhance the energy of the red light part to ensure that the peak intensity of the second peak is less than or equal to the peak intensity of the first peak. According to this embodiment, this application also provides Example 7. In Example 7, the first light-emitting element 1 is a blue LED with a peak wavelength of 408 nm. The first phosphor 201 is a yellow phosphor with an aluminate structure and a peak wavelength of 565 nm, with the molecular formula Y3Al5O 12 :Ce 3+, the phosphor weight is 7.57 g. The second phosphor 202 is a nitride-based red phosphor with a peak wavelength of 635 nm, and its molecular formula is (Sr,Ca,Ba)SiAlN3:Eu 2+ , the phosphor weight is 2.63 g. In addition, the light source module L1 further includes a red LED with a peak wavelength of 660 nm. The substrate material 204 is 10 g of transparent silica gel. After the first phosphor 201 and the second phosphor 202 are mixed into the substrate material 204, they are fully mixed evenly in a blender, and then coated on a blue LED chip emitting a main peak of 408 nm and a red LED chip emitting a main peak of 660 nm. After drying to remove air bubbles, a warm yellow LED chip is obtained, and thus the preparation of the light source module L1 is completed.

[0070] The positions of the emitted light colors of Examples 1-7 in the CIE1931 color space are as Figure 2 shown. Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 、 Figure 12 、 Figure 14 、 Figure 16 are the relative spectral energy distribution diagrams of the emitted light of Examples 1-7 respectively, Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 、 Figure 13 、 Figure 15 、 Figure 17 are the comparison diagrams of Examples 1-7 and the reference spectra respectively, where each reference spectrum is the blackbody radiation spectral distribution with the same color temperature as the emitted light of the corresponding example. The luminescence characteristics and spectral characteristics of the emitted light of Examples 1-7 are shown in Table 2.

[0071] Table 2

[0072]

[0073] Rows 1-7 in Table 2 correspond to Examples 1-7, and the 8th row is Figure 3 the luminescence characteristics of typical warm white light in the prior art. The two columns x and y in the table respectively represent the coordinate values of the light color of the emitted light of the light source module L1 on the x-axis and y-axis in the CIE1931 color coordinate system. The specific positions of each example in the CIE1931 color coordinates are as Figure 2 shown. We found that all points fall within the interval enclosed by the points with a distance duv = -0.005 to 0.005 from the blackbody locus at a correlated color temperature of 1450~1750 K, that is, the illustrated area A2. After conducting user experiments on these examples later, we found that the effects of Examples 1-4 are better, and from Figure 2As we can see, these points all fall within the illustrated area A1. Area A1 is an ellipse with a center point x0 = 0.571, y0 = 0.402, major axis a = 0.00229, minor axis b = 0.00129, inclination angle θ = 38.7°, and SDCM = 5.0.

[0074] In Table 2, CCT is the color temperature, and duv represents the distance and direction of the color deviation from the Planck locus in the color coordinate system. The similarity S and M / P are obtained according to the calculation formulas in this application document. The similarity S in each embodiment is greater than 78%. For the more preferred Embodiments 1-4, the similarity S is greater than 82%. M / P is also less than 0.16. In the table, I2 / I1 represents the ratio of the peak intensity of the second peak to the peak intensity of the first peak. It can be seen that the peak intensity of the second peak in each embodiment is less than or equal to 12.0% of the peak intensity of the first peak. CRI is the color rendering index. From Table 2, we can see that the emitted light of the light source module L1 in all embodiments has a high color rendering index, CRI ≥ 80.0.

[0075] The above light source module L1 can be applied to various types of lamps. Figure 18 Figure [not provided] shows a lighting device D1 according to a preferred embodiment of the present application. The lighting device D1 is a lamp panel, and in other preferred embodiments, it can also be a chandelier, a ceiling lamp, etc. Or the light source module L1 can also be applied to various types of lamps such as table lamps, downlights, and spotlights. The lighting device D1 includes a chassis 6, a face frame 8 provided with a diffuser plate 9, a light source module L1 provided on a light source board 5, and a power supply module 7 that supplies the power required for the operation of the light source module L1. The lighting device D1 can also include a controller, a heat dissipation device, a light distribution component, etc. according to the functions and requirements of specific lamps. The controller can be used to adjust the light color, light intensity, etc. of the irradiation light emitted by the light source module L1. In addition to the diffuser plate in the embodiment, the light distribution component can also be a lampshade, a lens, a diffusion element, an optical waveguide, etc. The present application does not limit this.

[0076] The above description of the preferred embodiments of the present application is for the purpose of illustration and description, and is not intended to exhaust or limit the present application to the specific forms disclosed. Obviously, many modifications and variations may be made, and these modifications and variations may be obvious to those skilled in the art and should be included within the scope of the present application defined by the appended claims.

Claims

1. A light source module, characterized in that, It includes a first light-emitting element and a packaging portion covering the first light-emitting element. The first light-emitting element emits first-color light with a peak wavelength in the range of 390 - 470 nm. The packaging portion includes: A first phosphor, which is arranged to emit second-color light with a peak wavelength in the range of 520 - 560 nm after being excited by the first-color light. A second phosphor, which is arranged to emit third-color light with a peak wavelength in the range of 610 - 660 nm and a half-width of 80 - 100 nm after being excited by the first-color light. The first-color light, the second-color light, and the third-color light are mixed to form the emitted light of the light source module. The emitted light is within the interval enclosed by the points on the CIE1931 color space where the distance duv from the correlated color temperature of 1450 - 1750 K to the blackbody locus is -0.005 - 0.

005. In the spectrum of the emitted light, a first peak is formed in the range greater than 610 nm where the spectral intensity maximum is located. In the range of 390 - 470 nm of the spectrum of the emitted light, a second peak is formed, and the peak intensity of the second peak is less than or equal to 12.0% of the peak intensity of the first peak.

2. The light source module according to claim 1, characterized in that, The first light-emitting element is an LED chip; the first phosphor is a green phosphor, a yellow phosphor, or a phosphor combination containing at least one of a green phosphor and a yellow phosphor; the first phosphor is a red phosphor, an orange phosphor, or a phosphor combination containing at least one of a red phosphor and an orange phosphor.

3. The light source module according to claim 2, characterized in that, The weight ratio of the second phosphor to the first phosphor is 10% - 60%.

4. The light source module according to claim 3, characterized in that, The packaging portion further includes a base material. After the first phosphor, the second phosphor, and the base material are mixed evenly, they are coated on the first light-emitting element.

5. The light source module according to claim 4, characterized in that, The base material is transparent silicone or transparent resin. The weight ratio of the sum of the weights of the first phosphor and the second phosphor to the weight of the base material is 50% - 120%.

6. The light source module according to claim 5, characterized in that, The packaging portion further includes a light diffusing agent, which is one of nano-titanium oxide, alumina, or silica. The weight ratio of the light diffusing agent to the base material is less than 3.0%.

7. The light source module according to claim 2, characterized in that, The green phosphor and the yellow phosphor are aluminate-based phosphors with the chemical formula Y3Al5O 12 :Ce 3+ , Lu3Al5O 12 :Ce 3+ , Y3(Al,Ga)5O 12 :Ce 3+ , Tb3Al5O 12 :Ce 3+ ; Or it is a silicate-based phosphor with the chemical formula (Ca, Sr, Ba)2(Mg, Zn)Si2O7:Eu 2+ , (Ca, Sr, Ba)2MgSi3O5:Eu 2+ , β-(Sr, Ba, Ca)2SiO4:Eu 2+ , α-(Sr, Ba, Ca)2SiO4:Eu 2+ ; Or it is a nitrogen oxide system phosphor with the chemical formula β-(Sr,Ca)SiAlON:Eu 2+ , α-(Sr,Ca)SiAlON:Eu 2+ .

8. The light source module according to claim 2, characterized in that, The red phosphor and the orange phosphor are nitride-based phosphors with the chemical formula (Sr,Ba)2Si5N8:Eu 2+ , (Sr,Ca,Ba)SiAlN3:Eu 2+ .

9. The light source module according to any one of claims 2 - 8, characterized in that, The light color of the emitted light is within the ellipse range on the CIE1931 color space with a center point x0 = 0.571, y0 = 0.402, major axis a = 0.00229, minor axis b = 0.00129, inclination angle θ = 38.7°, and SDCM = 5.

0.

10. The light source module according to any one of claims 2 - 8, characterized in that, In the visible light range of the spectrum of the emitted light, the ratio M / P of the scotopic illuminance M to the photopic illuminance P is ≤ 0.

20.

11. The light source module according to any one of claims 2 - 8, characterized in that, In the range of 380 - 660 nm of the spectrum of the emitted light, the similarity S to the blackbody radiation spectrum with the same color temperature and the same brightness is ≥ 78%.

12. An illumination device, characterized in that, It includes: The light source module according to any one of claims 1 to 11.

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