CN108598244B - Light source module and lighting device comprising same - Google Patents
Light source module and lighting device comprising same Download PDFInfo
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- CN108598244B CN108598244B CN201810662725.5A CN201810662725A CN108598244B CN 108598244 B CN108598244 B CN 108598244B CN 201810662725 A CN201810662725 A CN 201810662725A CN 108598244 B CN108598244 B CN 108598244B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Abstract
A light source module and a lighting device using the same are provided, wherein the light source module comprises a first light-emitting element and a packaging part covering the first light-emitting element, the packaging part comprises a first additional light-emitting body, a second additional light-emitting body and a third additional light-emitting body, and light emitted by the light-emitting bodies is mixed into warm white light to be used as emitted light of the light source module. The light source module provided by the invention controls the proportion of the luminous energy in the total luminous energy in a wavelength region of 495-580 nm which has the greatest influence on the CS value, and provides an LED warm white light (3000K) light source which has high luminous efficiency, low CS value and high color rendering property. The light with low CS value is especially suitable for leisure and entertainment of people and provides a relaxed light environment for people.
Description
Technical Field
The invention relates to a light source module and a lighting device comprising the same.
Background
With the arrival and development of the third lighting technology revolution, incandescent lamps, halogen lamps and the like have been gradually banned from production and sale by countries all over the world due to low lighting efficiency and no energy saving, and LED lighting fixtures have been widely used instead. The existing LED lighting products mainly solve the problems of energy conservation, illumination, color and color rendering. When using LED lighting products, more and more people pay attention to the fact that more blue light in LEDs may affect the circadian rhythm of the human body. As for the influence of lighting products on the physiological rhythm of human bodies, the lighting products can be evaluated through a diurnal stimulation (Circadian Stimulus) evaluation model, namely CS values and spectra with low CS values which are known in the industry, and under the same illumination, the lighting products are particularly suitable for leisure and entertainment of people and provide a relaxed light environment for people. The current market lacks an LED illumination product which has low CS value and can further consider the influence of light on the physiological rhythm of a human body while considering energy conservation, illumination, color and color rendering property.
Disclosure of Invention
The invention aims to solve the problems and find an LED white light source with low CS value, high color rendering and high luminous efficiency.
In order to achieve the above-mentioned functions, the present invention provides a light source module, which comprises a first light emitting device and a package portion covering the first light emitting device,
the first light-emitting element emits first color light with the peak wavelength of 430-460 nm;
the package portion includes:
a first parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a second color light having a peak wavelength in the range of 500-540 nm;
a second parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a third color light having a peak wavelength in the range of 540-580 nm;
a third parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a fourth color light having a peak wavelength in the range of 620-660 nm,
the first color light, the second color light, the third color light and the fourth color light are mixed to form the emitting light of the light source module, the emitting light is warm white light, namely the emitting light is positioned in an interval enclosed by points of a correlated color temperature of 3000 +/-180K and a blackbody locus at a distance duv of-0.005 on a CIE1931 color space,
the spectrum of the emitted light is continuously distributed in a visible light range of 380-780 nm, the relative deviation value delta I of the spectral intensity of two adjacent points in the spectrum is defined,
wherein Intensit (I) and Intensit (I +1) respectively represent the spectral intensity of two points with the wavelength difference of step length I in the spectrum, I is more than or equal to 1nm and less than or equal to 5nm,
the emission spectrum comprises two peaks, a peak valley and a stable distribution interval:
the first peak is positioned in a wavelength region of 430-460 nm;
the second peak is located in a wavelength region of 620-660 nm, and the ratio of the spectral intensity of the first peak to the spectral intensity of the second peak is 40-80%;
the peak-valley is located in a wavelength region of 455-485 nm, the ratio of the spectral intensity of the peak-valley to the spectral intensity of the second peak is less than or equal to 20%, and the ratio of the spectral intensity of any point in the region of 495-510 nm of the peak-valley towards the long wave direction to the spectral intensity of the second peak is less than or equal to 50%;
the stable distribution interval is a wavelength region of 530-580 nm, the ratio of the spectral intensity of any point in the stable distribution interval to the spectral intensity of the second peak is 50-90%, and the delta I of any two adjacent points is not more than 2.0%.
Preferably, the ratio of the spectral intensity of the first peak to the spectral intensity of the second peak is between 50% and 70%.
Preferably, the ratio of the spectral intensity of the peak valley to the spectral intensity of the second peak is between 8% and 18%.
Preferably, Δ I of any two adjacent points in the stable distribution interval is not greater than 1.0%.
Preferably, the first light-emitting element is a blue LED with the peak wavelength of emitted light of 430-460 nm; the first additional luminophor is green fluorescent powder with the peak wavelength of 500-540 nm and the half width of 60-115 nm; the second additional luminophor is yellow fluorescent powder with the peak wavelength of 540-580 nm and the half width of 60-115 nm; the third additional luminophor is red fluorescent powder with the peak wavelength of 620-660 nm and the half width of 80-120 nm.
Preferably, the first light-emitting element is a blue LED with the peak wavelength of emitted light being 435-455 nm.
Preferably, the half width of the yellow fluorescent powder/green fluorescent powder is 90-115 nm, and the half width of the red fluorescent powder is 80-100 nm.
Preferably, the total weight of the green phosphor, the yellow phosphor and the red phosphor is defined as the total weight of the phosphors, and the total weight of the phosphors accounts for 35.0% to 70.0% of the weight of the package.
Preferably, the yellow phosphor/green phosphor is one or a mixture of two or more of the following phosphors:
(a) garnet-structured phosphor, Ce3+Is an activator
The chemical composition general formula is as follows: (M3)3-x(M4)5O12:Cex
Wherein M3 is at least one element selected from Y, Lu, Gd and La, M4 is at least one element selected from Al and Ga, and x is 0.005-0.200;
(b) silicate-based phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (M5)2-xSiO4：Eux
Or (Ba, Ca, Sr)2-x(Mg,Zn)Si2O7:Eux
Wherein M5 is at least one element of Mg, Sr, Ca and Ba, and x is 0.01-0.20;
(c) oxynitride phosphor (SiAlON beta-SiAlON), Eu2+Is an activator
The chemical composition general formula is as follows: sibAlcOdNe：Eux
Wherein x is 0.005-0.400, b + c is 12, and d + e is 16;
(d) aluminate system phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (Sr, Ba)2-xAl2O4:Eux
Or (Sr, Ba)4-xAl14O25：Eux
Wherein x is 0.01 to 0.15.
Preferably, the proportion of the yellow phosphor in the total phosphor weight is 5.0-28.0%, and the proportion of the green phosphor in the total phosphor weight is 0.1-10.0%.
Preferably, the red phosphor is one or a mixture of two or more of the following phosphors:
(a) nitride red powder, Eu, having a 1113 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M1)1-xAlSiN3:Eux
Wherein M1 is at least one element of Ca, Sr and Ba, and x is 0.005-0.300;
(b) nitride red powder, Eu, having a 258 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M2)2-xSi5N8：Eux
Wherein M2 is at least one element of Ca, Sr, Ba and Mg, and x is 0.005-0.300.
Preferably, the proportion of the red phosphor in the total phosphor weight is 50.0-85.0%.
Preferably, the encapsulation portion further includes a base material and a light diffusing agent, the base material is silica gel or resin, and the light diffusing agent is one of nano-scale titanium oxide, aluminum oxide, or silicon oxide.
Preferably, the light color of the light emitted by the light source module is located in a quadrilateral region surrounded by four vertexes D1(0.4603,0.4272), D2(0.4327,0.4177), D3(0.4171,0.3823) and D4(0.4409,0.3903) in the CIE1931 color space.
Preferably, the light color of the light emitted by the light source module is in an elliptical range with a central point x 0-0.4370, a central point y 0-0.4040, a major axis a-0.00278, a minor axis b-0.00136, an inclination angle θ -53.1 ° and an SDCM-5.0 in the CIE1931 color space.
Preferably, the CS value of the emitted light of the light source module is less than or equal to 0.20 when the illumination intensity is 500 lux.
Preferably, the color rendering index CRI of the emitted light of the light source module is greater than or equal to 85.0, and R9 is greater than or equal to 65.0.
The application also provides a lighting device, which comprises the light source module.
The light source module provided by the invention controls the proportion of the luminous energy in the total luminous energy in a wavelength region of 495-580 nm which has the greatest influence on the CS value, and provides an LED warm white light (3000K) light source which has high luminous efficiency, low CS value and high color rendering property. The light with low CS value is especially suitable for leisure and entertainment of people and provides a relaxed light environment for people.
Drawings
FIG. 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of spectral characteristics of a light source module according to a preferred embodiment of the present invention;
FIG. 3 is a CIE1931 color coordinate diagram according to the preferred embodiments 1-7 of the present invention;
FIG. 4 is a graph of the emission spectrum of preferred embodiment 1 of the present invention;
FIG. 5 is a graph of the emission spectrum of the preferred embodiment 2 of the present invention;
FIG. 6 is a graph of the emission spectrum of the preferred embodiment 3 of the present invention;
FIG. 7 is a graph of the emission spectrum of the preferred embodiment 4 of the present invention;
FIG. 8 is a graph of the emission spectrum of the preferred embodiment 5 of the present invention;
FIG. 9 is a graph of the emission spectrum of the preferred embodiment 6 of the present invention;
FIG. 10 is a graph showing the spectrum of light emitted in preferred embodiment 7 of the present invention.
Detailed Description
The light source module and the lighting device according to the present invention will be described in detail with reference to the accompanying drawings and some preferred embodiments according to the present invention.
As shown in fig. 1, the light source module L1 provided by the present invention is a light source product, which can be applied in a lighting device (not shown) for providing daily lighting. The lighting device can be various lamps such as a desk lamp, a ceiling lamp, a down lamp and a spot lamp, comprises a light source module L1 and a power supply module for supplying electric power required by work to the light source module L1, and can be provided with a controller, a heat dissipation device, a light distribution component and the like according to the functions and requirements of specific lamps. The controller may be used to adjust the color and intensity of the illumination light emitted by the light source module L1, and the light distribution component may be a lampshade, a lens, a diffusion element, a light guide, etc.
One embodiment of the light source module L1 of the present invention is a mixed white LED package chip, which can be a general chip-on-chip package or COB package LED chip as shown in fig. 1, and the light source module L1 includes at least a first light emitting element 1 and a package portion 2 covering the first light emitting element.
The first light emitting element 1 is a blue light LED chip, and is directly excited by a semiconductor material to emit light, a peak wavelength of the light emission is 430 to 460nm, preferably 435 to 455nm, and a light color is blue, where the light emitted by the first light emitting element 1 is referred to as a first color light. The LED Chip (LED Chip) comprises a positive mounting or a reverse mounting, and a single LED Chip or a plurality of LED chips are connected together in series, parallel or series-parallel.
The package portion 2 uses transparent silicone or transparent resin as the base material 204, wherein the transparent resin refers to one of epoxy resin and urea resin. The first parasitic light emitter 201, the second parasitic light emitter 202, and the third parasitic light emitter 203 are doped in the base material 204. The first additional light emitter 201 is a green phosphor which receives part of the light emitted by the first light emitting element 1 and converts the light into a second color light with a peak wavelength of 500-540 nm and a half width of 60-115 nm, and the preferred half width is 90-115 nm. The second additional light emitter 202 is a yellow phosphor which receives part of the light emitted from the first light emitting element 1 and converts the light into third color light having a peak wavelength of 540 to 580nm and a half width of 60 to 115nm, and the preferred half width is 90 to 115 nm. The third additional light emitter 203 is a red phosphor which receives part of the light emitted from the first light emitting element 1 and converts the light into fourth color light having a peak wavelength of 620 to 660nm and a half width of 80 to 120nm, and the preferred half width is 80 to 100 nm. The encapsulating portion 2 may further include a light diffusing agent, and the light diffusing agent may be one of nano-scale titanium oxide, aluminum oxide, or silicon oxide. The various phosphors and light diffusers described above are mixed into the package base 204 and uniformly distributed in the package base 204, and the package base 204 mixed with the phosphors is covered over the blue LED chip as the first light emitting element 1 to form the package portion 2.
The additional light emitter functions in the light source module L1 to receive part of the light emitted by the first light emitting element 1 and convert the light into light of a color other than the first color, in this embodiment, the first color light, the second color light, the third color light, and the fourth color light are mixed to form the emission light of the light source module L1, and the emission light of the light source module L1 is white light in an interval surrounded by a point of the correlated color temperature 3000 ± 180K and the distance duv between-0.005 and 0.005 of the blackbody locus in the CIE1931 color space.
In the following, we will describe the various phosphors used, and for convenience of description, we define the sum of the weights of the green phosphor, the yellow phosphor and the red phosphor as the total phosphor weight. The proportion of the total phosphor powder weight in the packaging part 2 is 35-70%. The weight of the sealing portion 2 is the total weight of the sealing substrate 204 mixed with the phosphor and the light diffusing agent.
The proportion of the green phosphor as the first additional light emitter 201 in the total phosphor weight is 0.1% to 10.0%, and the proportion of the yellow phosphor as the second additional light emitter 202 in the total phosphor weight is 5.0% to 28.0%. Generally speaking, the yellow phosphor and the green phosphor are not defined clearly, the yellow phosphor and the green phosphor basically have the same chemical general formula, the difference is only in the molar ratio of the components, the application is characterized in that two phosphors with different peak wavelengths are combined in the wavelength band of 500-580 nm, wherein one phosphor with the peak wavelength of more than 540nm and less than 580nm is called yellow phosphor, and the other phosphor with the peak wavelength of less than 540nm and more than 500nm is called green phosphor. In other preferred embodiments, more phosphors may be used, but it is desirable to include one of the yellow phosphors and one of the green phosphors. The specific yellow phosphor/green phosphor can be any one or more than two of the following phosphors:
(a) garnet-structured phosphor, Ce3+Is an activator
The chemical composition general formula is as follows: (M3)3-x(M4)5O12:Cex
Wherein M3 is at least one element selected from Y, Lu, Gd and La, M4 is at least one element selected from Al and Ga, and x is 0.005-0.200;
(b) silicate-based phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (M5)2-xSiO4：Eux
Or (Ba, Ca, Sr)2-x(Mg,Zn)Si2O7:Eux
Wherein M5 is at least one element of Mg, Sr, Ca and Ba, and x is 0.01-0.20;
(c) oxynitride phosphor (SiAlON beta-SiAlON), Eu2+Is an activator
The chemical composition general formula is as follows: sibAlcOdNe：Eux
Wherein x is 0.005-0.400, b + c is 12, and d + e is 16;
(d) aluminate system phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (Sr, Ba)2-xAl2O4:Eux
Or (Sr, Ba)4-xAl14O25：Eux
Wherein x is 0.01 to 0.15.
The ratio of the red phosphor as the third additional light emitter 203 to the total phosphor weight is 50.0 to 85.0%, and any one of the following phosphors may be selected, or two or more kinds of the following phosphors may be mixed. Specific types of phosphors are as follows (in the present invention, the molar ratio is represented by x):
(a) nitride red powder, Eu, having a 1113 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M1)1-xAlSiN3:Eux
Wherein M1 is at least one element of Ca, Sr and Ba, and x is 0.005-0.300;
(b) nitride red powder, Eu, having a 258 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M2)2-xSi5N8：Eux
Wherein M2 is at least one element of Ca, Sr, Ba and Mg, and x is 0.005-0.300.
Given the types of phosphors that can be selected, we provide 7 specific examples in this application, in which a total of 10 phosphors are selected, and the parameters and chemical formulas of the phosphors selected in the examples are shown in the following table. For convenience of description, in table 1, a code is defined for the phosphor, and in the following description of the examples, the code is used for description, and the peak value and the chemical formula of the phosphor are not described in detail in each example.
TABLE 1
In the above table, the parameters are for the phosphor, x and y represent coordinate values of the light color of the phosphor in the CIE1931 color space, Peak represents the Peak wavelength, and Hw represents the half width, which are all actual values of the phosphor used in the examples, and are not intended to limit the present invention, because the Peak wavelength and the half width may deviate slightly from the above data due to the purity and particle size of the phosphor in actual production, and the deviation is generally controlled to be ± 5nm, and other schemes within this range should be considered to be equivalent to the above phosphor.
Table 2 shows 7 examples of the present application, and the kind of phosphors and the weight of the phosphors used in the examples, wherein the yellow-green ratio refers to the ratio of the mixed yellow and green phosphors in the total phosphor weight, and the total phosphor ratio refers to the total phosphor weight in the total weight of the encapsulant 2 after all four phosphors and the encapsulant substrate 204 are mixed. In these embodiments, the package substrate 204 is a transparent silicone gel weighing 10 g.
TABLE 2
The weight of the phosphors in the examples in table 2 is the data of the sample chips, and actually, in mass production, the weights of the phosphors are slightly different from one batch to another, but the ratio of the weights of the phosphors is within a fixed range. As can be seen from table 2, the proportion of the red phosphor as the third parasitic light emitter 203 in the total phosphor weight is in the range of 70.0% to 82.3%, and considering that other kinds of phosphors can be used, the proportion of the third parasitic light emitter 203 in the total phosphor weight should be in the range of 50% to 85%. In table 2, the content ratio of the yellow phosphor as the second additional luminous body 202 in the total phosphor weight is in the range of 13.9% to 25.5%, and it is considered that the content ratio of the second additional luminous body 202 in the total phosphor weight should be in the range of 10.0% to 26.0%, and it is further considered that the content ratio of the other phosphors may be extended to 5.0% to 28.0%. In table 2, the content of the green phosphor as the first parasitic light emitter 201 is in the range of 3.6% to 5.2% by weight of the total phosphor, and it is considered that the content of the first parasitic light emitter 201 by weight of the total phosphor should be in the range of 3.0% to 6.0% by weight, and it is further considered that the content of the other phosphors may be extended to 0.1% to 10.0%. The fluorescent powder can be coated on the LED chip by mixing transparent silica gel, or the remote fluorescent powder can be arranged at a position far away from the chip, or the remote fluorescent powder is partially mixed into packaging glue and partially arranged outside, and the application does not limit the fluorescent powder.
The details of the respective implementations are described with reference to the above table.
In embodiment 1, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 450 nm. 5.88g of red phosphor with the code number of R640 was weighed out as the third additional luminous body 203. 2.14g of yellow phosphor with the code number Y565 is weighed out as the second additional luminophor 202. 0.38G of green phosphor with the code number G-Ga535 was weighed out as the first additional luminophor 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 4, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 2, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 450 nm. 8.45g of red phosphor with the code number R650 was weighed out as the third parasitic illuminant 203. 1.65g of yellow phosphor with the code number Y565 is weighed out as the second additional luminophor 202. 0.48G of green phosphor with the code number G-L535 was weighed out as the first additional luminous body 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 5, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 3, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 445 nm. 9.20g of red phosphor with the code number R650 was weighed out as the third parasitic illuminant 203. 1.55g of yellow phosphor with the code number Y550 is weighed out as the second additional luminophor 202. 0.43G of green phosphor with the code number G-L535 was weighed out as the first additional luminous body 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 6, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 4, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 450 nm. 6.30g of red phosphor with the code number of R630 is weighed as the third additional luminous body 203. 1.80g of yellow phosphor with the code number Y550 is weighed out as the second additional luminous body 202. 0.39G of green phosphor with the code number G-Si525 was weighed out as the first additional luminous body 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 7, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 5, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 445 nm. 7.14g of red phosphor with the code number R650 was weighed out as the third parasitic illuminant 203. 2.25g of yellow phosphor with the code number Y565 is weighed out as the second additional luminous body 202. 0.45G of green phosphor with the code number G-Ga535 was weighed out as the first additional luminous body 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 8, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 6, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 445 nm. 5.84g of red phosphor with the code number R650 is weighed out as the third parasitic illuminant 203. 1.64g of yellow phosphor with the code number Y565 is weighed out as the second additional luminous body 202. 0.28G of green phosphor with the code number G-Si525 was weighed out as the first parasitic emitter 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 9, and the specific light-emitting characteristic is shown in a table 3.
In embodiment 7, the first light-emitting element 1 in the light source module L1 is a blue LED chip having a Peak of 445 nm. 5.12g of red phosphor with the code number R650 was weighed out as the third parasitic illuminant 203. The yellow phosphor 1.25 with the code number Y550 is weighed out as the second parasitic light emitter 202. 0.35G of green phosphor with the code number G-Si525 was weighed out as the first additional luminous body 201. And (3) putting the fluorescent powder into transparent silica gel, fully and uniformly mixing the fluorescent powder with a stirrer, coating the mixture on a blue light LED chip, drying and removing bubbles to obtain a neutral white light LED chip, wherein the spectrum of the neutral white light LED chip is shown in a figure 10, and the specific light-emitting characteristic is shown in a table 3.
TABLE 3
Table 3 shows the light emission characteristics of the light source module L1 in examples 1 to 7, where x and y represent coordinate values of the light color of the light emitted from the light source module L1 on the x and y axes of the CIE1931 color coordinate system, CCT is color temperature, duv represents the distance and direction of the color shift from the planckian locus in the color coordinate system, and CRI and R9 are color rendering indices. The CS value of 500lux in this application represents the CS value of light emitted from the light source module L1 at an illuminance of 500lux, and the specific calculation formula is as follows:
wherein
Wherein
P0(λ): spectral distribution of light source
P (λ): spectral distribution of light source corresponding to 500lux
Mc (λ): optic melanin sensitivity curve corrected for lens transmittance
S (λ): s-shaped cone cell sensitivity curve
mp (λ): macular pigment transmittance
V (λ): photopic vision luminous efficiency function
V' (λ): photopic efficiency function of scotopic vision
The calculation formula is based on a human rhythm light conduction mathematical model that has been released for the LRC.
From Table 3, it can be seen that the CS values of the emitted lights of the light source modules L1 of all the embodiments are less than 0.20 at an illumination of 500lux, and the color rendering indexes thereof are consistent with CRI ≧ 85.0 and R9 ≧ 65.0. The color of the emitted light in each embodiment is labeled on the CIE1931 color coordinate system, as shown in fig. 3, the color of each embodiment falls near the blackbody locus with a correlated color temperature of 3000 ± 180K, and the distance from the blackbody locus BBL is less than 0.005, i.e. duv is in the interval of-0.005 to 0.005. And all the points fall into a quadrilateral region enclosed by four vertexes of points D1(0.4603,0.4272), D2(0.4327,0.4177), D3(0.4171,0.3823) and D4(0.4409,0.3903), namely the region 1 shown in the figure. After user experiments on these embodiments in the later stage, we find that embodiments 1, 2, 4, 5, and 6 are more effective, and we can find from fig. 3 that these points all fall into the illustrated region 2, where the region 2 is an ellipse with a central point x0 ═ 0.4370, y0 ═ 0.4040, a major axis a ═ 0.00278, a minor axis b ═ 0.00136, an inclination angle θ ═ 53.1 °, and a SDCM ═ 5.0.
The embodiments provided herein enable lower CS values, primarily due to the energy distribution of the emitted light at different wavelengths, which can be characterized by their spectraAnd (4) characterizing the same. Fig. 2 is a schematic spectrum diagram of the spectral characteristics of the light emitted from the light source module L1 according to the present application, and we explain the spectral characteristics of the present application according to fig. 2. As can be seen from FIG. 2, the spectrum of the light emitted from the light source module L1 is continuously distributed in the visible light range of 380-780 nm, i.e. each point in 380-780 nm has a certain energy distribution, which can ensure that the spectrum has better display. For the convenience of the following description, we first define the relative deviation value Δ I of the spectral intensity between two adjacent points in a spectrum, where Δ I represents the emphasized change of the spectrum between two adjacent points in the spectrum, and is represented as the slope of the connecting line between two adjacent points in the spectrum. The concrete formula is
Wherein Intensit (I) and Intensit (I +1) respectively represent the spectral intensity of two adjacent points in the spectrum with the wavelength difference of step length I. For two adjacent points on the spectrum, theoretically the points on the line can be infinitely close, but as a convention in the industry, the two adjacent points generally refer to two points separated by a certain wavelength in the spectrogram, the separated wavelength is called as step length I, and generally, 5nm is adopted as the step length, for example, two points of 600nm and 605nm in the spectrogram are called as two adjacent points. Therefore, the relative deviation value Δ I of the spectral intensity between two adjacent points is a value representing the smoothness of the spectrum, and the shorter the step length is, the more accurately the change of the spectrum can be represented, so the value range of the step length I can be defined as 1nm ≦ I ≦ 5nm, and in this embodiment, we also adopt the conventional definition, and define two points separated by 5nm as two adjacent points.
The spectrum of fig. 2 includes mainly the features of a first peak P1, a second peak P2, a peak valley V1 and a stable distribution interval Z.
The first peak P1 is located in the wavelength region of 430-460 nm, since the light source module L1 uses the blue LED chip of the first light emitting element 1 as an excitation light source, although a large part of the emitted light from the blue LED chip is subjected to wavelength conversion by the additional light emitter, a part of the energy is not converted, and the energy forms a first peak in the wavelength region of 430-460 nm, the P1 point may be the same as the peak wavelength of the blue LED chip, because the main source of the energy of the peak is the first light emitting element 1, but the converted light of each additional light emitter may also have a part of energy in the wavelength region, and after the two are mixed, the first peak P1 does not necessarily completely coincide with the peak wavelength position of the blue LED chip of the first light emitting element 1, and may slightly shift, but still stays in the wavelength region of 430-460 nm.
The second peak P2 is located in the wavelength region of 620-660 nm, and the energy of the second peak P2 is provided by the red phosphor of the third additional light emitter 203 receiving part of the light emitted by the blue LED chip of the first light emitting element 1 and converting the received part into red light. The ratio of the spectral intensity of the first peak P1 to the spectral intensity of the second peak P2 is between 40% and 80%, preferably between 50% and 70%. In fig. 2 the height of the second peak P2 is close to twice the first peak P1, and the ratio of the spectral intensity of the first peak P1 to the spectral intensity of the second peak P2 is close to 50%, in other embodiments the ratio will be slightly different, but also close to 50%.
The peak-valley V1 is located in the 455-485 nm wavelength region, and the ratio of the spectral intensity of the peak-valley V1 to the spectral intensity of the second peak P2 should be less than or equal to 20%, preferably 8% -18%. In addition to the position of the peak-valley V1, the width of the peak-valley V1 affects the energy distribution, and in order to achieve the effect required by the present application, we require the peak-valley V1 and the peak-valley toward the long wave direction 495-510 nm, and the ratio of the spectral intensity of any point in the graph labeled as a to the spectral intensity of the second peak P2 is less than or equal to 50%, that is, the maximum value of the spectral intensity in the region is not more than 50.0%, so as to ensure that the energy in the blue-green light range is small.
The stable distribution interval Z is a wavelength region of 530 to 580nm, and is called as a stable distribution interval because the spectral intensity change in the interval is small, the spectral curve of the interval is almost flat, wherein Δ I of any two adjacent points is not more than 2.0%, more preferably not more than 1.0%, and the ratio of the spectral intensity of any point to the spectral intensity of the second peak P2 is between 50% and 90%. The energy of the stable distribution interval Z is provided by converting part of the light emitted by the blue LED chip of the first light-emitting element 1 after the yellow phosphor of the second parasitic light emitter 202 and the green phosphor of the first parasitic light emitter 201 are combined, and is an ideal state in fig. 2, and the overall fluctuation of the stable distribution interval Z is small, but since the combination of the yellow phosphor and the green phosphor is formed by mixing two phosphors, it is also possible to have slight fluctuation in this interval, but as long as Δ I is within the range defined by us, the result will not be greatly affected, and the desired CS value can still be achieved.
Table 4 lists the characteristic values of the respective spectra of examples 1 to 7, in which the P1 wavelength, the P2 wavelength, and the V1 wavelength refer to the wavelengths of the points of the first peak P1, the second peak P2, and the peak valley V1, respectively, the P1 energy ratio refers to the ratio of the spectral intensity of the first peak P1 to the spectral intensity of the second peak P2, the V1 energy ratio refers to the ratio of the spectral intensity of the peak valley V1 to the spectral intensity of the second peak P2, the Z-zone minimum and maximum refer to the minimum and maximum values of the ratio of the spectral intensity of any point in the stable distribution zone Z to the spectral intensity of the second peak P2, respectively, the Z-zone maximum Δ I value refers to the maximum value of the Δ I values of any adjacent two points in the stable distribution zone Z, and the A-zone maximum value refers to the maximum value of the ratio of the spectral intensity of any point in the range of wavelengths 495-510 nm to the spectral intensity of the second peak P2.
TABLE 4
These characteristic values all fall within the spectral characteristic ranges described above, and it is due to the presence of these characteristics that examples 1 to 7 having these spectral characteristics can realize the light emission characteristics of low CS value and high display in table 3.
The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise form disclosed, and it will be apparent that numerous modifications and variations may be made thereto, which will be apparent to those skilled in the art, and are intended to be included within the scope of the invention as defined by the following claims.
Claims (18)
1. A light source module is characterized in that the light source module comprises a first light emitting element and a packaging part covering the first light emitting element,
the first light-emitting element emits first color light with the peak wavelength of 430-460 nm;
the package portion includes:
a first parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a second color light having a peak wavelength in the range of 500-540 nm;
a second parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a third color light having a peak wavelength in the range of 540-580 nm;
a third parasitic light emitter arranged to receive a portion of the light emitted by the first light emitting element and convert it to a fourth color light having a peak wavelength in the range of 620-660 nm,
the first color light, the second color light, the third color light and the fourth color light are mixed to form the emitting light of the light source module, the emitting light is warm white light, namely the emitting light is positioned in an interval surrounded by points of which the correlated color temperature is 3000 +/-180K and the distance duv = -0.005 of a blackbody locus on a CIE1931 color space,
the spectrum of the emitted light is continuously distributed in a visible light range of 380-780 nm, the relative deviation value delta I of the spectral intensity of two adjacent points in the spectrum is defined,
wherein Intensit (I) and Intensit (I +1) respectively represent the spectral intensity of two points with the wavelength difference of step length I in the spectrum, I is more than or equal to 1nm and less than or equal to 5nm,
the emission spectrum comprises two peaks, a peak valley and a stable distribution interval:
the first peak is positioned in a wavelength region of 430-460 nm;
the second peak is located in a wavelength region of 620-660 nm, and the ratio of the spectral intensity of the first peak to the spectral intensity of the second peak is 40-80%;
the peak-valley is located in a wavelength region of 455-485 nm, the ratio of the spectral intensity of the peak-valley to the spectral intensity of the second peak is less than or equal to 20%, and the ratio of the spectral intensity of any point in the region of 495-510 nm of the peak-valley towards the long wave direction to the spectral intensity of the second peak is less than or equal to 50%;
the stable distribution interval is a wavelength region of 530-580 nm, the ratio of the spectral intensity of any point in the stable distribution interval to the spectral intensity of the second peak is 50% -90%, and the delta I of any two adjacent points is not more than 2.0%.
2. The light source module of claim 1, wherein the ratio of the spectral intensity of the first peak to the spectral intensity of the second peak is between 50% and 70%.
3. The light source module of claim 1, wherein the ratio of the spectral intensity of the peak-valley to the spectral intensity of the second peak is between 8% and 18%.
4. The light source module as claimed in claim 1, wherein Δ I between any two adjacent points in the stable distribution interval is not greater than 1.0%.
5. The light source module as claimed in claim 1, wherein the first light emitting element is a blue LED emitting light with a peak wavelength of 430-460 nm; the first additional luminophor is green fluorescent powder with the peak wavelength of 500-540 nm and the half width of 60-115 nm; the second additional luminophor is yellow fluorescent powder with the peak wavelength of 540-580 nm and the half width of 60-115 nm; the third additional luminophor is red fluorescent powder with the peak wavelength of 620-660 nm and the half width of 80-120 nm.
6. The light source module of claim 5, wherein the first light emitting element is a blue LED emitting light with a peak wavelength of 435-455 nm.
7. The light source module as claimed in claim 5, wherein the half width of the yellow phosphor/green phosphor is 90-115 nm, and the half width of the red phosphor is 80-100 nm.
8. The light source module as claimed in claim 5, wherein the total weight of the green phosphor, the yellow phosphor and the red phosphor is defined as a total phosphor weight, and the total phosphor weight accounts for 35.0% to 70.0% of the package portion.
9. The light source module of claim 8, wherein the yellow/green phosphor is one or more of the following phosphors:
(a) garnet-structured phosphor, Ce3+Is an activator
The chemical composition general formula is as follows: (M3)3-x(M4)5O12:Cex
Wherein M3 is at least one element selected from Y, Lu, Gd and La, M4 is at least one element selected from Al and Ga, and x = 0.005-0.200;
(b) silicate-based phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (M5)2-xSiO4：Eux
Or (Ba, Ca, Sr)2-x(Mg,Zn)Si2O7:Eux
Wherein M5 is at least one element of Mg, Sr, Ca and Ba, and x = 0.01-0.20;
(c) oxynitride phosphor (SiAlON beta-SiAlON), Eu2+Is an activator
The chemical composition general formula is as follows: sibAlcOdNe：Eux
Wherein x = 0.005-0.400, b + c =12, d + e = 16;
(d) aluminate system phosphor, Eu2+Is an activator
The chemical composition general formula is as follows: (Sr),Ba)2-xAl2O4:Eux
Or (Sr, Ba)4-xAl14O25：Eux
Wherein x =0.01~ 0.15.
10. The light source module as claimed in claim 9, wherein the ratio of the yellow phosphor to the total phosphor is 5.0% to 28.0%, and the ratio of the green phosphor to the total phosphor is 0.1% to 10.0%.
11. The light source module as claimed in claim 8, wherein the red phosphor is one or more of the following phosphors:
(a) nitride red powder, Eu, having a 1113 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M1)1-xAlSiN3:Eux
Wherein M1 is at least one element of Ca, Sr and Ba, and x = 0.005-0.300;
(b) nitride red powder, Eu, having a 258 crystal structure2+Is an activator
The chemical composition general formula is as follows: (M2)2-xSi5N8：Eux
Wherein M2 is at least one element of Ca, Sr, Ba and Mg, and x = 0.005-0.300.
12. The light source module as claimed in claim 11, wherein the ratio of the red phosphor in the total phosphor weight is 50.0% to 85.0%.
13. The light source module of claim 8, wherein the encapsulation portion further comprises a base material and a light diffuser, the base material is silica gel or resin, and the light diffuser is one of nano-scale titanium oxide, aluminum oxide or silicon oxide.
14. The light source module of any one of claims 1-13, wherein the light color of the light emitted by the light source module is located in a quadrilateral region surrounded by four vertices D1(0.4603,0.4272), D2(0.4327,0.4177), D3(0.4171,0.3823), and D4(0.4409,0.3903) in the CIE1931 color space.
15. The light source module of claim 14, wherein the light color of the light emitted by the light source module is within an ellipse of a central point x0=0.4370, y0=0.4040, a major axis a =0.00278, a minor axis b =0.00136, a tilt angle θ =53.1 ° and SDCM =5.0 in CIE1931 color space.
16. The light source module according to any one of claims 1-13, wherein the light emitted from the light source module has a CS value of 0.20 or less at an illumination of 500 lux.
17. The light source module as claimed in any one of claims 1 to 13, wherein the color rendering index CRI of the emitted light of the light source module is greater than or equal to 85.0, and R9 is greater than or equal to 65.0.
18. An illumination device, comprising: the light source module according to any one of claims 1 to 17.
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| EP3965175B1 (en) | 2019-06-05 | 2023-05-24 | Suzhou Opple Lighting Co., Ltd. | Light source module and lighting device comprising same |
| CN110212076B (en) | 2019-06-05 | 2024-03-19 | 欧普照明股份有限公司 | Light source module and lighting device comprising same |
| EP3982428B1 (en) * | 2019-06-05 | 2023-12-27 | Suzhou Opple Lighting Co., Ltd. | White light source module and lighting device comprising the same |
| CN110233197A (en) * | 2019-06-05 | 2019-09-13 | 欧普照明股份有限公司 | A kind of light source module group and the lighting device including the light source module group |
| CN111162153B (en) * | 2020-01-03 | 2021-02-23 | 旭宇光电（深圳）股份有限公司 | LED light source for rhythm lighting |
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