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

Abstract

A light source module includes a first light-emitting element and a packaging portion covering the first light-emitting element. The packaging portion includes a first additional light-emitting body, a second additional light-emitting body, and a third additional light-emitting body. The light of each light-emitting element and light-emitting body is mixed to form the emitted light of the light source module, and the emitted light is warm white light. The spectral energy in the wavelength range (470~515nm] accounts for 10.0%~25.0% of the entire spectral energy. The light source module provided by the present invention adds a phosphor whose emission spectrum is completely covered by the melanopsin light-sensitive curve, so that the melanopsin light-sensing efficiency ratio Kmel of the entire light source module reaches more than 0.52. At the same time, warm white light color is achieved by adding yellow-green phosphor and red phosphor, and high color rendering property is ensured. This emitted light with a high Kmel value can improve concentration under the same illuminance. While providing a warm white light warm atmosphere, it is especially suitable for people to concentrate on learning and working.

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. The existing LED lighting products mainly solve the problems of energy conservation, illuminance, color, and color rendering, but more and more manufacturers will also pay attention to the preferences of users. They notice that in the choice of household lighting, people prefer warm white light, which can create a warm family atmosphere.

[0003] However, while providing a warm environment, warm white light always makes people drowsy. However, the home is not completely a place for relaxation, and there are still some tasks of work and study that need to be completed at home. Therefore, how to provide a light source device suitable for people to concentrate on learning and working without affecting the warm family atmosphere 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 that can make people concentrate 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 435 and 465 nm.

[0007] The packaging part includes:

[0008] A first additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into second color light with a peak wavelength located between 485 and 520 nm. The emission spectrum of the first additional light-emitting body is completely covered by the melanopsin light-sensitive curve.

[0009] A second additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into third color light with a peak wavelength located between 520 and 580 nm.

[0010] A third additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into fourth color light with a peak wavelength located between 610 and 690 nm.

[0011] The first color light, the second color light, the third color light, and the fourth color light are mixed to form the emitted light of the light source module. The emitted light is warm white light, that is, on the CIE1931 color space, the emitted light is within the interval enclosed by points where the distance duv from the correlated color temperature of 3050±150K to the blackbody locus is -0.006~0.006.

[0012] Define the spectral energy of the emitted light within the visible light range, that is, within the wavelength range [380~780nm], as the entire spectral energy of the emitted light. The spectral energy of the emitted light within the wavelength range (470~515nm] accounts for 10.0%~25.0% of the entire spectral energy.

[0013] Furthermore, the spectral energy of the emitted light within the wavelength range (470~515nm] accounts for 11.0%~20.0% of the entire spectral energy.

[0014] Furthermore, the spectrum of the emitted light:

[0015] The spectral energy within the wavelength range [380~470nm] accounts for 4.0%~14.0% of the entire spectral energy;

[0016] The spectral energy within the wavelength range (470~560nm] accounts for 25.0%~45.0% of the entire spectral energy;

[0017] The spectral energy within the wavelength range [600~780nm] accounts for 45.0%~65.0% of the entire spectral energy.

[0018] Furthermore, the spectrum of the emitted light:

[0019] The spectral energy within the wavelength range [380~470nm] accounts for 5.0%~10.0% of the entire spectral energy;

[0020] The spectral energy within the wavelength range (470~560nm] accounts for 25.0%~37.0% of the entire spectral energy;

[0021] The spectral energy within the wavelength range [600~780nm] accounts for 50.0%~60.0% of the entire spectral energy.

[0022] Furthermore, the spectrum of the emitted light is continuously distributed within the 380~780nm visible light range, including at least three spectral emission peaks. There is 1 spectral emission peak within the blue light region of 435~465nm, called the first peak; there is 1 spectral emission peak within the blue-green light region of 470~510nm, called the second peak; there is 1 spectral emission peak within the red light region of 610~690nm, called the third peak, where:

[0023] The ratio of the spectral intensity of the first peak to the spectral intensity of the third peak is between 22.0% and 70.0%;

[0024] The ratio of the spectral intensity of the second peak to the spectral intensity of the third peak is between 45.0% and 80.0%.

[0025] Further, the spectrum of the emitted light:

[0026] The ratio of the spectral intensity of the first peak to the spectral intensity of the third peak is between 27.0% and 60.0%;

[0027] The ratio of the spectral intensity of the second peak to the spectral intensity of the third peak is between 50.0% and 70.0%.

[0028] Further, the first light-emitting element is a blue LED with an emission peak wavelength in the range of 435 - 465 nm; the first additional light-emitting body is a cyan phosphor with a peak wavelength in the range of 485 - 520 nm and a half-width of 25 - 65 nm.

[0029] Further, the cyan phosphor is any one or a mixture of two or more of a nitride oxide phosphor, a Ga-doped garnet phosphor, and a silicate phosphor.

[0030] Further, the cyan phosphor is the nitride oxide phosphor Ba 1-x Si2N2O2:Eu x , (x = 0.008 - 0.18).

[0031] Further, the second additional light-emitting body is a yellow-green phosphor with a peak wavelength in the range of 520 - 580 nm and a half-width of 90 - 115 nm; the third additional light-emitting body is a red or orange phosphor with a peak wavelength in the range of 610 - 690 nm and a half-width of 80 - 120 nm.

[0032] Further, the yellow-green phosphor is any one or a mixture of two or more of a garnet-structured phosphor and an aluminate phosphor.

[0033] Further, the yellow-green phosphor includes at least one yellow phosphor and at least one green phosphor.

[0034] Further, the red or orange phosphor is any one or a mixture of two or more of a 1113-structure nitride red powder, a 258-structure nitride red powder, and a fluosilicate red powder..

[0035] Further, the ratio Kmel of the melanopsin light-sensing efficiency of the emitted light of the light source module is 0.52 or more.

[0036] Furthermore, the scotopic luminous efficiency ratio Kmel of the light emitted by the light source module is above 0.57.

[0037] Furthermore, the light color of the light emitted by the light source module is within the quadrilateral region enclosed by four vertices P1(0.4313, 0.4171), P2(0.4159, 0.3819), P3(0.4352, 0.3887), and P4(0.4538, 0.4252) in the CIE1931 color space.

[0038] Furthermore, the light color of the light emitted by the light source module is within the ellipse range with the center point x0 = 0.4338, y0 = 0.4030, major axis a = 0.00278, minor axis b = 0.00136, inclination angle θ = 53.1°, and SDCM = 5.0 in the CIE1931 color space.

[0039] Furthermore, the color rendering index CRI of the light emitted by the light source module is ≥90.0, and R9 ≥ 70.0.

[0040] The present invention also provides an illumination device including the above light source module.

[0041] By adding phosphors whose emission spectra are completely covered by the scotopic light-sensitive curve, the scotopic luminous efficiency ratio Kmel of the entire light source module reaches above 0.52. At the same time, by adding yellow-green phosphors and red phosphors, warm white light color is achieved, and high color rendering is ensured. This kind of light emission with a high Kmel value can improve concentration under the same illuminance. While providing a warm white light and cozy atmosphere, it is especially suitable for people to concentrate on learning and working. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;

[0043] Figure 2 is a relative spectral comparison diagram of a cyan phosphor, a cyan LED, and a scotopic light-sensitive curve;

[0044] Figure 3 is a CIE1931 color coordinate diagram of preferred embodiments 1 to 6 according to the present invention;

[0045] Figure 4 is an emission spectrum diagram of preferred embodiment 1 in the present invention;

[0046] Figure 5 is an emission spectrum diagram of preferred embodiment 2 in the present invention;

[0047] Figure 6It is the emission light spectrum diagram of the preferred embodiment 3 in the present invention;

[0048] Figure 7 It is the emission light spectrum diagram of the preferred embodiment 4 in the present invention;

[0049] Figure 8 It is the emission light spectrum diagram of the preferred embodiment 5 in the present invention;

[0050] Figure 9 It is the emission light spectrum diagram of the preferred embodiment 6 in the present invention;

[0051] Figure 10 It is the structural schematic diagram of the lighting device of the preferred embodiment in the present invention. Detailed implementation manners

[0052] The following further elaborates in detail on 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.

[0053] Traditionally, it was believed 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. 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; while when the melatonin content is low, we will be awake and energetic. Therefore, scientists have defined a new illuminance value EML (Equivalent Melanopic Lux), equivalent melanopic illuminance, which is used to quantify the degree of stimulation of the light source on the melanopsin light response. The conventional illuminance value lux (lx) is used to measure the light sensitivity of cone cells and quantitatively describe the light that can make the human eye see objects. And the melanopic illuminance value (EML) is weighted according to the response of ipRGCs to light, converting the spectral stimulation of the light source, so as to quantitatively describe the biological effect of light on people. Light with a higher EML will improve alertness, prevent drowsiness, and enhance work efficiency.

[0054] The embodiments of the present application are to provide a lighting product with a relatively high EML. Since EML cannot be directly measured, the index we use here is the melanopsin light-sensing efficiency ratio Kmel. By measuring the relative intensity of each wavelength and calculating the EML ratio by weighted calculation with a specified formula, the specific formula is as follows:

[0055]

[0056] Wherein:

[0057] EDI_mel(D65): Scotopic illuminance of equivalent D65 light source

[0058] Ev: Photopic illuminance

[0059] P(λ): Spectral power distribution of light source

[0060] V(λ): Photopic luminous efficiency function

[0061] Mel(λ): Photosensitivity function of melanopsin photoreceptor cells (ipRGC)

[0062] The calculation formula is based on the parameter definitions and calculation methods published by CIE S026.

[0063] Common white LEDs on the market currently generate white light through RGB color mixing, where a blue chip excites green and red phosphors, and then the red, green, and blue colors are mixed to form white light. In order to increase the value of Kmel in this application, a cyan phosphor is added to the traditional chip. Figure 2 A comparison diagram of the cyan phosphor, cyan LED, and melanopsin photosensitivity curve is shown. It is a relative spectral intensity diagram, and each curve in the figure has been normalized. The melanopsin photosensitivity curve is the curve formed based on the Mel(λ) photosensitivity function of melanopsin photoreceptor cells (ipRGC). From the figure, we can see that melanopsin photoreceptor cells (ipRGC) are most sensitive to light with wavelengths of 425 - 575 nm, and almost all of the light of the cyan phosphor is covered by the melanopsin photosensitivity curve. Therefore, it can most effectively improve Kmel. In addition, although the cyan LED can also improve Kmel, obviously the overlap between the cyan phosphor and the melanopsin photosensitivity curve is better. In Figure 2 the overlap area between the cyan phosphor and the melanopsin photosensitivity curve is 41.2% more than that of the cyan LED. In order to ensure that the emission spectrum of the cyan phosphor is fully covered by the melanopsin photosensitivity curve, its half-width should not be too wide, and the emission peak is located close to the peak of the melanopsin photosensitivity curve. Therefore, the cyan phosphor we selected has a peak wavelength in the range of 485 - 520 nm and a half-width of 25 - 65 nm.

[0064] A specific embodiment of the light source module L1 of the present invention is a color-mixed white LED packaging chip, 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.

[0065] The first light-emitting element 1 is a blue LED chip, which emits light directly excited by a semiconductor material. The peak wavelength of its emitted light is located in the range of 435 - 465 nm, and the light color is 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 direct-mounted or flip-chip type, and a single LED Chip or multiple LED Chips are connected together in series, parallel, or series-parallel connection.

[0066] The encapsulation part 2 uses transparent silicone or transparent resin as the base material 204, and the transparent resin can be selected from epoxy resin and urea resin. The base material 204 is doped with a first additional light-emitting body 201, a second additional light-emitting body 202, and a third additional light-emitting body 203. The first additional light-emitting body 201 is a cyan fluorescent powder that 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 485 - 520 nm and a half-width of 25 - 65 nm. As mentioned above, its emission spectrum is completely covered by the melanopsin light-sensitive curve. The second additional light-emitting body 202 is a yellow-green fluorescent powder containing at least one peak wavelength in the range of 520 - 580 nm and a half-width of the emission spectrum of 60 - 115 nm, preferably a half-width of 90 - 115 nm. Since color is an intuitive human perception and it is impossible to precisely divide the spectral boundaries between yellow and green, in this application, we call the fluorescent powder with a peak wavelength in the range of 520 - 540 nm green fluorescent powder, and the fluorescent powder with a peak wavelength in the range of 540 - 580 nm yellow fluorescent powder. In this application, the second additional light-emitting body 202 can be selected from yellow fluorescent powder and green fluorescent powder. However, in order to provide better color rendering, the second additional light-emitting body in this embodiment adopts a scheme of yellow fluorescent powder plus green fluorescent powder. That is, the second additional light-emitting body 202 is a combination of yellow fluorescent powder and green fluorescent powder. The combined yellow-green fluorescent powder 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 520 - 580 nm. The third additional light-emitting body 203 is a red or orange fluorescent powder that receives part of the light emitted by the first light-emitting element 1 and converts it into a fourth color light with a peak wavelength in the range of 610 - 690 nm and a half-width of 5 - 120 nm, preferably a half-width of 80 - 120 nm. The encapsulation part 2 may also include a light diffusing agent, and the light diffusing agent can be one of nano-titanium oxide, alumina, or silica. The above various fluorescent powders and light diffusing agents are weighed according to a ratio and then mixed into the base material 204, and then stirred evenly on a mixer so that the fluorescent powders and light diffusing agents are evenly distributed in the base material 204. After removing air bubbles, the base material 204 mixed with fluorescent powder is covered above the blue LED chip serving as the first light-emitting element 1 using a dispensing machine to form the encapsulation part 2.

[0067] Next, we will describe the various phosphors we use. For the convenience of description, we define the sum of the weights of the first additional luminescent body, the second additional luminescent body, and the third additional luminescent body as the total phosphor weight. The proportion of the total phosphor weight in the encapsulation part 2 is 35% - 85%. The weight of the encapsulation part 2 is the total weight of the base material 204 after mixing in the phosphor and the light diffusing agent.

[0068] The proportion of the cyan phosphor as the first additional luminescent body 201 in the total phosphor weight is 10.0% - 35.0%, and it can be selected from any one or a mixture of two or more of nitride oxide phosphors, Ga-doped garnet phosphors, and silicate phosphors. The specific phosphors are as follows (in the present invention, x represents the molar ratio, and the given molecular formula is the general chemical composition formula of the same type of phosphor):

[0069] (a) Nitride oxide, Eu 2+ as the activator

[0070] General chemical composition formula: (Ba,Ca) 1-x Si2N2O2:Eu x

[0071] where x = 0.005 - 0.200;

[0072] (b) Ga-doped garnet phosphor, Eu 2+ as the activator

[0073] General chemical composition formula: Ga-LuAG:Eu;

[0074] (c) Silicate phosphor, Eu 2+ as the activator

[0075] General chemical composition formula: Ba2SiO4:Eu.

[0076] In this embodiment, the combined proportion of the yellow phosphor and the green phosphor as the second additional light-emitting body 202 in the total weight of the phosphor is 12.0 to 45.0%. As mentioned above, there is no clear boundary between yellow and green. Similarly, there is no clear definition for yellow and green phosphors. These two basically have the same chemical general formula, and the difference lies only in the molar ratio of the components therein. In this embodiment, two phosphors with different peak wavelengths are selected for combination in the wavelength band of 520 to 580 nm. One of them is a yellow phosphor, and we define its peak wavelength to be greater than 540 nm, and the other is a green phosphor with a peak wavelength less than 540 nm. In this embodiment, two yellow and green phosphors with different peak wavelengths are selected for combination mainly to improve the color rendering property. In other preferred embodiments, only selecting one yellow or green phosphor does not affect the effect of high Kmel proposed in this application, but the color rendering property may be slightly worse than that of this embodiment. The specific yellow phosphor / green phosphor can be any one or a mixture of two or more of the following phosphors:

[0077] (a) Garnet structure phosphors include YAG phosphors, GaYAG phosphors, LuAG phosphors, etc., Ce 3+ being the activator

[0078] Chemical composition general formula: (M1) 3-x( M2)5O 12 :Ce x

[0079] wherein M1 is at least one element of Y, Lu, Gd and La, M2 is at least one element of Al and Ga, and x = 0.005 to 0.200;

[0080] (b) Aluminate system phosphors, Eu 2+ being the activator

[0081] Chemical composition general formula: (Sr,Ba) 2-x Al2O4:Eu x or (Sr,Ba) 4-x Al 14 O 25 :Eu x

[0082] wherein x = 0.01 to 0.15.

[0083] The proportion of the red or orange phosphor as the third additional light-emitting body 203 in the total weight of the phosphor is 15.0 to 55.0%, and it can be selected from any one or a mixture of two or more of 1113 structure nitride red powder, 258 structure nitride red powder, and fluosilicate red powder. The specific phosphors are as follows (in the present invention, x represents the molar ratio, and the given molecular formula is the chemical composition general formula of the same type of phosphor):

[0084] (a) Nitride red powder with a 1113 crystal structure, Eu 2+ as the activator

[0085] General chemical composition formula: (M3) 1-x AlSiN3:Eu x

[0086] where M3 is at least one element among Ca, Sr, and Ba, and x = 0.005 - 0.300;

[0087] (b) Nitride red powder with a 258 crystal structure, Eu 2+ as the activator

[0088] General chemical composition formula: (M4) 2-x Si5N8: Eu x

[0089] where M4 is at least one element among Ca, Sr, Ba, and Mg, and x = 0.005 - 0.300;

[0090] (c) Manganese-activated fluosilicate red powder 4+ as the activator

[0091] General chemical composition formula: K2SiF6: Mn 4+ .

[0092] The above gives the types of phosphors that can be selected. In this application, we provide 6 specific embodiments, and a total of 10 phosphors are selected in these embodiments. The parameters and chemical formulas of the phosphors selected in the embodiments are shown in the following table. For ease of description, we define codes for the phosphors in Table 1, and we will use these codes to describe them in the subsequent embodiment descriptions, without detailing the peak values and chemical formulas of the phosphors in each embodiment.

[0093] Table 1

[0094]

[0095] In the above table, the parameters are all for this type of phosphor. x and y represent the coordinate values of the phosphor's light color in the CIE1931 color space. Peak represents the peak wavelength, and Hw represents the half-width. The above values are the actual values of the phosphors used in the examples, and are not limitations of the present invention. Because in actual production, due to differences in phosphor purity and particle size, the peak wavelength and half-width may deviate slightly from the above data. This deviation value is generally controlled within ±5 nm, and other solutions within this range should be considered equivalent to the above phosphors. Among them, there are many types of red, yellow, and green phosphors that can be selected, and other selections have little impact on the solution of this application. The cyan phosphor is of particular concern in this application. Preferably, the general molecular formula of the oxynitride phosphor used in the example is Ba 1-x Si2N2O2:Eu x , (x = 0.008 - 0.18).

[0096] Table 2 shows 8 examples of this application, as well as the types of phosphors used in each example and the weights of various phosphors. Among them, the powder weight ratio of each phosphor respectively refers to the proportion of the weights of multiple phosphors in each color phosphor in the total weight of the total phosphors. The total powder weight ratio refers to the total weight of the total phosphors, that is, the proportion of the total weight of all the phosphors included in the three additional light-emitting bodies in the total weight of the encapsulation part 2 after mixing these phosphors and the substrate material 204. In these examples, the substrate material 204 is all transparent silica gel with a weight of 10 g.

[0097] Table 2

[0098]

[0099] The weights of the phosphor in the examples in Table 2 are all data obtained when we fabricated the sample chips of the light source module L1. In actual mass production, due to different batches of phosphors, there will be slight differences in weight, but their basic proportions are within a fixed range. The amounts of various phosphors used are mainly to control the energy proportion of the emitted light within a specified wavelength range after mixing, because the energy distribution affects the calculation of the Kmel value of the emitted light. Therefore, we have a basic requirement for the energy distribution in each range when designing the chip. Here, we only discuss the spectrum within the visible light range. Therefore, the total spectral energy described below refers to the sum of the spectral energy within the visible light range, that is, the wavelength range [380~780nm]. As previously introduced, melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGCs) are most sensitive to light in the 425~575nm range, and the improvement of the Kmel value mainly lies in the energy distribution in this range. Therefore, it is required that the spectral energy of the emitted light of the light source module L1 in the wavelength range (470~515nm] accounts for 10.0%~25.0% of the total spectral energy, preferably 11.0%~20.0%. And the spectral energy in the wavelength range (470~560nm] accounts for 25.0%~45.0% of the total spectral energy, preferably 25.0%~37.0%. Such an energy distribution can ensure a relatively high Kmel value. In addition to having certain requirements for the energy in this range, in order to ensure that the emitted light of the light source module L1 is warm white light, we also have certain restrictions on the energy in the blue and red light ranges. Among them, the spectral energy in the blue light range, that is, the wavelength range [380~470nm], accounts for 4.0%~14.0% of the total spectral energy, preferably 5.0%~10.0%. The spectral energy in the red light range, that is, the wavelength range [600~780nm], accounts for 45.0%~65.0% of the total spectral energy, preferably 50.0%~60.0%.

[0100] When the energy division within each spectral range is basically determined, the phosphors we adopt are formulated with this as the goal. The energy in the wavelength range [380~470nm] is provided by the first light-emitting element 1, a blue LED chip. In fact, all the energy of the emitted light is provided by it. Originally, all the energy should be concentrated in this range. However, since part of the light is converted by the phosphor into other light colors, the converted energy is distributed in other wavelength ranges, and the energy remaining in this range is less than 30%. The spectral energy in the wavelength range (470~560nm] is mainly provided by the first additional light-emitting body 201 and the second additional light-emitting body 202 after converting part of the emitted light of the first light-emitting element 1. Here, it is said to be mainly because the spectrum is continuous, and the emitted light of the first light-emitting element 1 itself is not completely without energy in this range, but the energy relative to the converted energy is smaller. When designing the chip, we mainly consider the part converted by the phosphor, select a more appropriate powder weight ratio, and then actually measure the energy in this range. The measured energy must include the energy provided by each light-emitting body, but the first additional light-emitting body 201 and the second additional light-emitting body 202 play a major role in this range. The spectral energy in the wavelength range [600~780nm] is mainly provided by the red or orange phosphor serving as the third additional light-emitting body 203. The powder weight ratios in Table 2 are only the values in specific embodiments. In actual situations, due to the different phosphors used, the proportions of various phosphors are mainly adjusted according to the energy in each spectral range measured in the spectrum. These phosphors can be coated on the LED chip by mixing them into transparent silica gel, or remote phosphors can be set at a position farther away from the chip, or part can be mixed into the encapsulation glue and part can be set on the external surface. This application does not make any limitations on this.

[0101] Weigh the corresponding red phosphor, yellow phosphor, green phosphor and cyan phosphor according to the phosphor ratio in Table 2, put them into 10.00g of transparent silica gel, mix them evenly by a stirrer, coat them on the blue LED chip, and after drying to remove air bubbles, we get warm white LED lamp beads, which are the specific six embodiments of the light source module L1. The spectral diagrams of Embodiments 1-6 are respectively Figures 3 - 8 the spectral diagrams, and their spectral characteristics are shown in Table 3.

[0102] Table 3

[0103]

[0104] The spectra of the emitted light in Examples 1-6 are continuously distributed within the visible light range of 380-780 nm and include at least three spectral emission peaks. There is one spectral emission peak in the blue light region of 435-465 nm, which is called the first peak. Peak1 in Table 3 represents the peak spectral position of the first peak. Since the light source module L1 uses the blue LED chip of the first light-emitting element 1 as the excitation light source, although a large part of the emitted light from the blue LED chip has been wavelength-converted by the additional light-emitting body, there is still a part of the energy that has not been converted. These energies form the first peak in the wavelength region of 435-465 nm. This P1 point may be the same as the peak wavelength of the blue LED chip because the main source of the energy of this peak is the first light-emitting element 1. However, there may also be some energy of the light converted by each additional light-emitting body in this wavelength band. After mixing the two, this first peak P1 does not necessarily coincide exactly with the peak wavelength position of the original first light-emitting element 1 blue LED chip and may shift slightly, but it is still within the wavelength region of 435-465 nm. The first peak is basically located within [380-470 nm], so the energy within the wavelength section of [380-470 nm] is mainly the energy of the first peak. The light source module L1 has another spectral emission peak in the blue-green light region of 470-510 nm, which is called the second peak. Peak2 in Table 3 represents the peak spectral position of the second peak. The energy of the second peak is mainly provided by the cyan phosphor of the first additional light-emitting body 201 receiving and converting part of the light emitted by the blue LED chip of the first light-emitting element 1 into cyan light. Of course, the yellow-green phosphor of the second additional light-emitting body 202 also enters this range, making the peak wavelength of the second peak not exactly the same as the excitation wavelength of the cyan phosphor of the first additional light-emitting body 201. However, after the shift, its peak wavelength should still be within 470-510 nm. The light source module L1 also has one spectral emission peak in the red light region of 610-690 nm, which is called the third peak. Peak3 in Table 3 represents the peak spectral position of the third peak. The energy of the third peak is mainly provided by the red or orange phosphor of the third additional light-emitting body 203 receiving and converting part of the light emitted by the blue LED chip of the first light-emitting element 1 into red light. In Table 3, I1 / I2 represents the ratio of the spectral intensity of the first peak to the spectral intensity of the third peak. In this application, this value is required to be between 22.0% and 70.0%, preferably between 27.0% and 60.0%. I2 / I2 represents the ratio of the spectral intensity of the second peak to the spectral intensity of the third peak. In this application, this value is required to be between 45.0% and 80.0%, preferably between 50.0% and 70.0%.

[0105] The above peak positions can basically ensure the energy proportion within each section. Due to the existence of these peaks, Examples 1-6 with these spectral characteristics can achieve the energy proportion within the defined sections. The last four columns in Table 3 show the energy proportion in the specified sections of the spectra of Examples 1-6. I_Σ[380-470]nm, I_Σ(470-515]nm, I_Σ(470-560]nm, and I_Σ[600-780]nm respectively represent the proportion of the spectral energy within the listed wavelength ranges in the entire spectral energy, and these ratios are all expressed in percentage form. From the table, we can see that in Examples 1-6, the energy proportion in these regions all meets the design requirements mentioned above, and it can achieve a relatively high Kmel value when emitting warm white light. The specific luminous characteristics are shown in Table 4.

[0106] Table 4

[0107]

[0108] Table 4 lists the luminous characteristics of the light source module L1 in Examples 1-6, where x and y represent the coordinate values of the light color of the emitted light of the light source module L1 on the x and y axes in the CIE1931 color coordinate system. The specific positions of each example in the CIE1931 color coordinates are as Figure 3 shown. We find that all points fall within the quadrilateral region enclosed by four vertices P1(0.4313, 0.4171), P2(0.4159, 0.3819), P3(0.4352, 0.3887), and P4(0.4538, 0.4252), that is, the illustrated region 1. After conducting user experiments on these examples later, we find that the effects of Examples 1 and 6 are better. And from Figure 3 we can find that these points all fall within the illustrated region 2. Region 2 is an ellipse with a center point x0 = 0.4338, y0 = 0.4030, a major axis a = 0.00278, a minor axis b = 0.00136, an inclination angle θ = 53.1°, and SDCM = 5.0.

[0109] In Table 4, 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 function of each additional light emitter in the light source module L1 is to receive part of the light emitted by the first light emitting element 1 and convert it into light of a color different from the first color. In this embodiment, the emitted light of the light source module L1 is formed by mixing the first color light, the second color light, the third color light, and the fourth color light. The emitted light of the light source module L1 in Examples 1-6 falls near the blackbody locus with a correlated color temperature of 5000 ± 350K in the CIE1931 color space, and the distance from the blackbody locus BBL is less than 0.006, that is, duv is in the range of -0.006 to 0.006, which is warm white light color.

[0110] CRI and R9 are color rendering indices. As can be seen from Table 4, the emitted light of the light source module L1 in all examples has a high color rendering index, CRI ≥ 90.0, R9 ≥ 70.0.

[0111] Kmel is the scotopic luminous efficiency ratio, which is the main index of the light source module L1 of the present application. The specific calculation method is described above. As can be seen from Table 4, the Kmel values of Examples 1-6 of the light source module L1 made according to the above method are all above 0.52, and preferably the Kmel value is above 0.57.

[0112] The above light source module L1 can be applied to various types of lamps. Figure 10 Figure shows a preferred embodiment of the lighting device of the present application. In this embodiment, the lighting device is specifically a table lamp, which includes a lamp head 61, a lamp post 62, and a base 63. The light source module L1 is arranged at the lamp head position. In other preferred embodiments, the light source module L1 can also be applied to various types of lamps such as chandeliers, ceiling lamps, downlights, and spotlights. The present application does not limit this.

[0113] The above description of the preferred embodiments of the present invention is for the purpose of illustration and description, and is not intended to exhaust or limit the present invention to the specific forms disclosed. Obviously, many modifications and variations are possible, and these modifications and variations may be obvious to those skilled in the art and should be included within the scope of the present invention defined by the appended claims.

Claims

1. A light source module, which is applied to a household lighting environment, and is characterized in that, Comprising 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 435 - 465 nm; The packaging portion includes: A first additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into second-color light with a peak wavelength in the range of 485 - 520 nm. The emission spectrum of the first additional light-emitting body is fully covered by the melanopsin light-sensitive curve, and the spectrum of the second-color light has a second peak; A second additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into third-color light with a peak wavelength in the range of 520 - 580 nm; A third additional light-emitting body, which is arranged to receive part of the light emitted by the first light-emitting element and convert it into fourth-color light with a peak wavelength in the range of 610 - 690 nm. The spectrum of the fourth-color light has a third peak, and the spectral intensity of the third peak is the maximum value among the total spectral intensities in the visible light range, wherein, the spectral intensity of the second peak is 45.0 - 80.0% of the spectral intensity of the third peak, The first-color light, second-color light, third-color light, and fourth-color light are mixed to form the emitted light of the light source module, and the emitted light is warm white light, that is, on the CIE1931 color space, the emitted light is within the interval enclosed by the points with a distance duv = -0.006 - 0.006 from the blackbody locus at a correlated color temperature of 3050 ± 150 K, Define the spectral energy of the emitted light spectrum within the visible light range, that is, within the wavelength range [380 - 780 nm], as the entire spectral energy of the emitted light. The spectral energy of the emitted light spectrum within the wavelength range (470 - 515 nm] accounts for 10.0% - 25.0% of the entire spectral energy.

2. The light source module according to claim 1, wherein The spectral energy of the emitted light spectrum within the wavelength range (470 - 515 nm] accounts for 11.0% - 20.0% of the entire spectral energy.

3. The light source module according to claim 1, wherein The spectrum of the emitted light: The spectral energy within the wavelength range [380 - 470 nm] accounts for 4.0% - 14.0% of the entire spectral energy; The spectral energy within the wavelength range (470 - 560 nm] accounts for 25.0% - 45.0% of the entire spectral energy; The spectral energy within the wavelength range [600 - 780 nm] accounts for 45.0% - 65.0% of the entire spectral energy.

4. The light source module according to claim 3, wherein The spectrum of the emitted light: The spectral energy within the wavelength range [380 - 470 nm] accounts for 5.0% - 10.0% of the entire spectral energy; The spectral energy within the wavelength range (470 - 560 nm] accounts for 25.0% - 37.0% of the entire spectral energy; The spectral energy within the wavelength range [600 - 780 nm] accounts for 50.0% - 60.0% of the entire spectral energy.

5. The light source module according to claim 1, wherein The spectrum of the emitted light is continuously distributed within the 380 - 780 nm visible light range, and there is 1 spectral emission peak in the blue light region of 435 - 465 nm, called the first peak; The ratio of the spectral intensity of the first peak to the spectral intensity of the third peak is between 22.0% and 70.0%.

6. The light source module according to claim 5, wherein The spectrum of the emitted light: The ratio of the spectral intensity of the first peak to the spectral intensity of the third peak is between 27.0% and 60.0%. The ratio of the spectral intensity of the second peak to the spectral intensity of the third peak is between 50.0% and 70.0%.

7. The light source module according to claim 1, wherein The first light-emitting element is a blue LED with an emission peak wavelength in the range of 435 - 465 nm; the first additional light-emitting body is a cyan phosphor with a peak wavelength in the range of 485 - 520 nm and a half-width of 25 - 65 nm.

8. The light source module according to claim 7, wherein The cyan phosphor is any one or a mixture of two or more of nitride oxides phosphors, Ga-doped garnet phosphors, and silicate phosphors.

9. The light source module according to claim 8, wherein, The cyan phosphor is a nitride oxide phosphor Ba 1- x Si2N2O2:Eu x , (x = 0.008 to 0.18).

10. The light source module according to claim 7, wherein The second additional light-emitting body is a yellow-green phosphor with a peak wavelength in the range of 520 - 580 nm and a half-width of 90 - 115 nm; the third additional light-emitting body is a red or orange phosphor with a peak wavelength in the range of 610 - 690 nm and a half-width of 80 - 120 nm.

11. The light source module according to claim 10, wherein, The yellow-green phosphor is any one or a mixture of two or more of garnet-structured phosphors and aluminate phosphors.

12. The light source module according to claim 11, wherein The yellow-green phosphor includes at least one yellow phosphor and at least one green phosphor.

13. The light source module according to claim 10, characterized in that, The red or orange phosphor is any one or a mixture of two or more of 1113-structured nitride red powders, 258-structured nitride red powders, and fluosilicate red powders.

14. The light source module according to any one of claims 1-13, characterized in that, The ratio Kmel of the melanopsin photoreceptor efficiency of the emitted light of the light source module is 0.52 or more.

15. The light source module according to claim 14, wherein The ratio Kmel of the melanopsin photoreceptor efficiency of the emitted light of the light source module is 0.57 or more.

16. The light source module according to claim 14, wherein, The light color of the emitted light of the light source module is within the quadrilateral region enclosed by four vertices P1(0.4313, 0.4171), P2(0.4159, 0.3819), P3(0.4352, 0.3887), and P4(0.4538, 0.4252) in the CIE1931 color space.

17. The light source module according to claim 16, wherein The light color of the emitted light of the light source module is within the ellipse with a center point x0 = 0.4338, y0 = 0.4030, major axis a = 0.00278, minor axis b = 0.00136, inclination angle θ = 53.1°, and SDCM = 5.0 in the CIE1931 color space.

18. The light source module according to claim 14, characterized in that, The color rendering index CRI of the emitted light of the light source module is ≥90.0, and R9 ≥70.

0.

19. A lighting device, characterized in that, Comprising: The light source module according to any one of claims 1 to 18.

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