WO2020248748A1 - Led light source for rhythm lighting - Google Patents

Led light source for rhythm lighting Download PDF

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Publication number
WO2020248748A1
WO2020248748A1 PCT/CN2020/089164 CN2020089164W WO2020248748A1 WO 2020248748 A1 WO2020248748 A1 WO 2020248748A1 CN 2020089164 W CN2020089164 W CN 2020089164W WO 2020248748 A1 WO2020248748 A1 WO 2020248748A1
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Prior art keywords
chip
light source
blue
led light
phosphor
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PCT/CN2020/089164
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French (fr)
Chinese (zh)
Inventor
黎学文
陈磊
蔡济隆
朱玉雪
吴宇
陈冲
林金填
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旭宇光电（深圳）股份有限公司
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Publication of WO2020248748A1 publication Critical patent/WO2020248748A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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

Definitions

  • the invention belongs to the field of semiconductor light emitting technology, and specifically relates to an LED light source for rhythmic lighting.
  • LED light emitting diode
  • Rhythmic lighting is an emerging concept that aims to simulate the illuminance of natural light through lighting, so that people who often work indoors can automatically adjust their body rhythms according to light stimulation just like outside.
  • ipRGCs the intrinsically photosensitive ganglion cells contained in the human retina (intrinsically photosensitive ganglion cells)
  • Retinal ganglion cells ipRGCs
  • ipRGCs Retinal ganglion cells
  • One of the important influence pathways is the secretion of melatonin-the photosensitive effect.
  • ipRGCs After receiving the light signal, ipRGCs transmit the signal to the pineal gland through nerve pathways such as the suprachiasmatic nucleus (SCN), which affects the secretion of melatonin in the human body.
  • SCN suprachiasmatic nucleus
  • the spectrum of the lighting source should contain a high percentage of illuminance of 470-490nm blue light, which can inhibit the secretion of melatonin, make people less tired, work efficiently, and improve people’s attention and shortening Respond time and maintain positive emotions; during rest, the spectrum of the lighting source should contain blue light of 470-490nm with a lower percentage of illuminance, which promotes the secretion of melatonin, makes people sleepy, tired and sleepy, and enters a rest state faster. Therefore, the light source for rhythmic lighting should contain blue light of 470-490nm with a higher percentage of illuminance.
  • the spectrum of conventional white LED products is formed by coupling the blue light emitted by the GaN chip and the yellow light emitted by the phosphor excited by the blue light.
  • the spectrum contains a large amount of blue light at 415-460nm.
  • High-energy short-wave blue light has extremely high energy and can penetrate the lens directly to the retina, causing the atrophy or even death of retinal pigment epithelial cells.
  • Color rendering index refers to the ability of light to restore the color of an object. According to the standard GB/T 24908-2014, the color rendering index of office lighting LED lamps is not less than 80, so in the process of light source design, it is also necessary to fully consider the light quality of the emission spectrum. Conventional LED white light products are mostly formed by coupling single blue excited yellow phosphors, while the excitation wavelength peak range of common commercial phosphors is 447.5-455nm.
  • a single emission wavelength peak range is 447.5-455nm
  • the blue light chip excites the phosphor, and it is difficult to obtain a higher percentage illuminance at the emission spectrum at 470-490nm; if a single blue chip with a peak emission wavelength range of 470-480nm is used to excite the phosphor, the excitation efficiency is low, and the resulting emission Green light, yellow light and red light with higher wavelengths in the spectrum account for a relatively low proportion, and it is difficult to increase the color rendering index.
  • the purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an LED light source for rhythmic lighting, aiming to solve the technical problem that the illuminance of the 415-460nm waveband and the 470-490nm waveband of the existing light source cannot meet the requirements of rhythmic lighting.
  • One aspect of the present invention provides an LED light source for rhythmic lighting, comprising a blue chip and a phosphor excited by the blue chip.
  • the blue chip includes a first chip with a peak wavelength of 447.5-452.5 nm and a peak wavelength of 470-
  • the phosphor includes green powder with a peak wavelength between 520-540nm, yellow powder with a peak wavelength between 540-570nm and red powder with a peak wavelength between 610-640nm.
  • the present invention provides an LED light source for rhythmic lighting.
  • the LED light source excites green powder, yellow powder and red powder through a dual blue light chip with a unique wavelength band, so that the emission spectrum includes the LED spectrum excited by the dual blue light, and the spectrum contains higher 100%.
  • Divided 470-490nm blue light and lower percent illuminance 415-460nm blue light, high illuminance 470-490nm blue light can be used for rhythmic lighting, inhibit the secretion of melatonin, improve human work efficiency, low
  • the blue light of 415-460nm with illuminance can reduce the harm of blue light and protect the health of eyesight.
  • the spectral color rendering index is higher than 80, which can meet the requirements of rhythmic lighting.
  • Light quality requirements, in line with GB/T 24908-2014 has requirements for the color rendering index of office lighting LED lamps. Therefore, the LED light source has a good application prospect in the field of rhythmic lighting.
  • Figure 1 is a diagram of the relationship between ipRGC and the sensitivity of light wavelength in the present invention.
  • Fig. 2 is a spectrum diagram of a rhythmic illumination LED light source provided in Embodiment 1 of the present invention.
  • Fig. 3 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 2 of the present invention.
  • Fig. 4 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 3 of the present invention.
  • Fig. 5 is a spectrum diagram of a rhythmic illumination LED light source provided in Embodiment 4 of the present invention.
  • Fig. 6 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 5 of the present invention.
  • FIG. 7 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 6 of the present invention.
  • FIG. 8 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 7 of the present invention.
  • Fig. 9 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 8 of the present invention.
  • FIG. 10 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 9 of the present invention.
  • Fig. 11 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 10 of the present invention.
  • Fig. 12 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 11 of the present invention.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
  • an embodiment of the present invention provides an LED light source for rhythmic illumination, including a blue chip and phosphor excited by the blue chip, the blue chip including a first chip with a peak wavelength of 447.5-452.5 nm and a peak wavelength
  • the second chip with a wavelength of 470-480nm, the phosphor includes green powder with a peak wavelength between 520-540nm, yellow powder with a peak wavelength between 540-570nm and red powder with a peak wavelength between 610-640nm.
  • the embodiment of the present invention provides an LED light source for rhythmic lighting.
  • the LED light source excites green powder, yellow powder and red powder through a dual blue light chip with a unique wavelength band, so that the emission spectrum includes the LED spectrum excited by the dual blue light.
  • High-percent illuminance 470-490nm blue light and lower illuminance 415-460nm blue light, high-illuminance 470-490nm blue light can be used for rhythmic lighting, inhibit the secretion of melatonin, and improve human work efficiency .
  • Low illumination 415-460nm blue light can reduce blue light hazards and protect vision health; moreover, on the basis of simultaneously increasing 470-490nm blue light and reducing 415-460nm blue light, the spectral color rendering index is higher than 80, which can meet the rhythm
  • the light quality requirements of lighting meet the requirements of GB/T 24908-2014 for the color rendering index of office lighting LED lamps. Therefore, the LED light source has a good application prospect in the field of rhythmic lighting
  • the emission peak of the first chip is 447.5-452.5 nm, and the blue light of this wavelength is within the peak range of the phosphor excitation spectrum excited by the blue chip, which can be efficiently excited Phosphor powder supplements the higher wavelengths of green, yellow and red light in the spectrum, while reducing the proportion of low-wavelength blue light at 415-460nm in the spectrum;
  • the emission peak of the second chip is 470-480nm, and the blue light of this wavelength is not Within the peak range of the excitation spectrum of the phosphor excited by the blue chip, it mainly plays a role in supplementing the blue part of the spectrum with a wavelength of 470-490 nm.
  • the second chip For the second chip, if you choose to use a chip with a peak wavelength below 470nm and use the same phosphor combination, the blue light emitted by the chip and the phosphor will be efficiently coupled, which will reduce the proportion of blue light in the 470-480nm band.
  • the second chip selects the peak wavelength at 470-480nm.
  • the color rendering index refers to the ability of light to restore the color of an object.
  • the color rendering index of office lighting LED lights is not less than 80, so in the process of light source design, it is also necessary to fully consider The light quality of the emission spectrum.
  • simply increasing the blue light of 470-490nm or reducing the blue light of 415-460nm may cause the color rendering index to decrease, which is difficult to meet the requirements of the national standard. Therefore, when designing the light source, it is necessary to reserve a certain amount of blue light to increase the color rendering index.
  • the spectral color rendering index is higher than 80, which can well meet the light quality requirements of rhythmic lighting and conform to GB /T 24908-2014 Requirements for the color rendering index of office lighting LED lamps.
  • Figure 1 is a graph of the relationship between ipRGC and light wavelength sensitivity. It can be found from Figure 1 that ipRGC is most sensitive to blue light stimulation with a wavelength of 470-490nm, and the ability to inhibit melatonin secretion is the strongest under irradiation at this wavelength. Therefore, increasing the proportion of blue light with a wavelength of 470-490nm can effectively reduce the human body's melatonin secretion level, and improve people's working spirit and state in a light environment.
  • the emission spectrum of the LED light source for rhythm lighting provided by the present invention is excited by a dual blue chip.
  • the wavelength of the first chip and the second chip are obviously different, and the excitation efficiency of the phosphor is different, and the blue chip needs to be precisely adjusted
  • the intensity ratio between the intensity ratio, the concentration ratio of the phosphor, and the matching effect between the blue chip and the phosphor to meet the light quality requirements of rhythmic lighting, reduce blue light hazards and GB/T 24908-2014 requirements for color rendering index of office lighting LED lamps.
  • the blue light chip includes a plurality of the first chips and a plurality of the second chips, and the first chip and the second chip are connected in series, parallel, or a combination of series and parallel. .
  • the difference between the working voltages of the first chip and the second chip is less than or equal to 5%; and the peak intensity of the first chip and the second chip under the same working conditions The ratio is (0.3-0.5):1.0. If the peak intensity of the first chip is too high, the proportion of blue light with a wavelength of 415-460nm in the obtained emission spectrum will increase, increasing the risk of blue light damage. Therefore, the peak intensity of the second chip is greater than that of the first chip strength.
  • the peak wavelength of the first chip is 447.5-452.5 nm
  • the peak wavelength of the second chip is 472.5-477.5 nm.
  • the peak wavelength is excited by dual blue chips, and the excitation effect is better.
  • the mass percentage of the green powder and the yellow powder is 93-97%, and the mass percentage of the red powder is 3-7 %. Further, based on the total weight of the phosphor as 100%, the mass percentage of green powder in the phosphor is 17-85%, and the sum of the mass percentage of yellow powder is 8-80% , The mass percentage of the red powder is 3-7%.
  • the green powder with a peak wavelength between 520-540 nm is a rare-earth-doped yttrium aluminum garnet phosphor; the yellow powder with a peak wavelength between 540-570 nm is a rare-earth-doped aluminum Salt-type phosphor; the red powder with a peak wavelength between 610-640nm is a rare-earth-doped silicon-based nitride phosphor.
  • the doped rare earth elements include one or more of the rare earth elements such as Ce, Ga, Lu, Dy, Tb, Ln, and Eu.
  • the doped rare earth elements include one or more of the rare earth elements such as Ce, Ga, Lu, Dy, Tb, Ln, Eu.
  • the rare earth-doped silicon-based nitride phosphor includes one or more of alkaline earth metal elements such as Ca, Sr, and Ba, and includes one or more of doped rare earth elements such as Eu, Tm, and Dy.
  • the green phosphor is preferably Lu 3 Al 5 O 12 :Ce
  • the yellow phosphor is preferably Y 3 (Al,Ga) 5 O 12 :Ce.
  • the red phosphor is preferably (Sr,Ca)AlSiN 3 :Eu. This series of phosphors have stable structure, better matching performance between phosphors, and higher external quantum efficiency.
  • fluorescent powder and silica gel are mixed to form fluorescent glue, and then the fluorescent glue is evenly coated around the chip.
  • the chip and the fluorescent glue are placed in a diode holder with a specific bowl shape, and the chip and the holder are electrically connected.
  • the LED spectrum provided by the present invention is a dual blue excitation LED spectrum.
  • the spectrum of the LED light source is in the 470-490nm band
  • the blue light content is controllable, and has low blue light emission in the 415-460nm band.
  • the blue light flux in the 470-490nm band can account for more than 10%, which is more than 150% higher than conventional lighting products; the blue light flux in the 415-460nm band accounts for less than 12%, which is more than 40% less than conventional lighting products.
  • Such a spectrum can regulate human body functions, inhibit melatonin secretion, make people less tired, and work efficiently. At the same time, the spectrum can reduce the harm of blue light, and the color rendering index of the spectrum is higher than 80, which can meet the requirements of the national standard.
  • a dual blue excitation LED light source the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.5:1.0, and the voltage difference is 5%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 52%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 41%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.4:1.0, and the voltage difference is 5%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 35%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 59%, and rare-earth-doped silicon-based nitride phosphors accounted for 6%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.4:1.0, and the voltage difference is 4%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 37%, and the rare-earth-doped rare earth Aluminate phosphors accounted for 57%, and rare earth doped silicon-based nitride phosphors accounted for 6%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.3:1.0, and the voltage difference is 3%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 17%, and the rare-earth-doped aluminum Salt-type phosphor accounts for 80%, and rare-earth-doped silicon-based nitride phosphor accounts for 3%.
  • a dual blue excitation LED light source the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.5:1.0, and the voltage difference is 5%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 85%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 9%, and rare-earth-doped silicon-based nitride phosphors accounted for 6%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.4:1.0, and the voltage difference is 5%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 81%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 12%, and the rare earth-doped silicon-based nitride phosphor accounts for 7%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.4:1.0, and the voltage difference is 4%.
  • the dual blue light excitation LED light source further includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 84%, and the rare-earth-doped aluminum Salt-type phosphors account for 9%, and rare-earth-doped silicon-based nitride phosphors account for 7%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm.
  • the peak intensity ratio It is 0.3:1.0, and the voltage difference is 3%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 85%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 10%, and the rare earth-doped silicon-based nitride phosphor accounts for 5%.
  • a dual blue excitation LED light source the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.4:1.0, the voltage difference is 5%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 47%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 46%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.4:1.0, the voltage difference is 4%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 46%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 47%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.5:1.0, the voltage difference is 4%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 66%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 30%, and the rare earth-doped silicon-based nitride phosphor accounts for 4%.
  • a conventional light source of single blue excitation LED the color temperature of the emission spectrum of the blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
  • the blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 455-457.5 nm.
  • the single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 59%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 36%, and the rare earth-doped silicon-based nitride phosphor accounts for 5%.
  • a conventional light source of single blue excitation LED the color temperature of the emission spectrum of the blue excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
  • the single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 69%, and the rare-earth-doped aluminum Salt-type phosphors account for 25%, and rare-earth-doped silicon-based nitride phosphors account for 6%.
  • a conventional lighting source of single blue excitation LED the color temperature of the emission spectrum of the blue excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
  • the blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
  • the single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 86%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 9%, and rare-earth-doped silicon-based nitride phosphors accounted for 5%.
  • a conventional lighting source of single blue excitation LED the color temperature of the emission spectrum of the blue excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
  • the blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
  • the single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 69%, and the rare-earth-doped aluminum Salt-type phosphors account for 25%, and rare-earth-doped silicon-based nitride phosphors account for 6%.
  • a dual blue excitation LED light source the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 457.5-462.5nm, and the peak intensity ratio It is 0.4:1.0, and the voltage difference is 3%.
  • the dual blue light excitation LED light source further includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 86%, and the rare-earth-doped aluminum Salt-type phosphors account for 10%, and rare-earth-doped silicon-based nitride phosphors account for 4%.
  • a dual blue light excitation LED light source the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
  • the dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 457.5-462.5nm, and the peak intensity ratio It is 0.8:1.0, and the voltage difference is 3%.
  • the dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 88%, and the rare-earth-doped aluminum Salt-type phosphor accounts for 5%, and rare-earth-doped silicon-based nitride phosphor accounts for 7%.
  • the dual blue LED spectral scheme provided by the embodiment of the present invention has a peak wavelength of about 480 nm when the color rendering index is higher than 80 and the color temperature is the same, and the luminous flux of blue light at 470-490 nm accounts for The ratio is greatly increased by more than 150%; at the same time, the luminous flux of 415-460nm blue light accounts for a significant drop of more than 40%.

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Abstract

An LED light source for rhythm lighting, belonging to the technical field of semiconductor light emission, and comprising a blue light chip and a phosphor excited by the blue light chip, the blue light chip comprising a first chip having a peak wavelength of 447.5-452.5nm and a second chip having a peak wavelength of 470-480nm, the phosphor comprising a green powder having a peak wavelength located between 520-540nm, a yellow powder having a peak wavelength located between 540-570nm and a red powder having a peak wavelength located between 610-640nm. The LED light source simultaneously increases 470-490nm blue light and reduces 415-460nm blue light, the spectral colour rendering index is higher than 80, light quality requirements for rhythm lighting can be satisfied, and the requirements of GB/T 24908-2014 for the colour rendering index of an office lighting LED lamp are met.

Description

节律照明用的LED光源LED light source for rhythm lighting 技术领域Technical field
本发明属于半导体发光技术领域，具体涉及一种节律照明用的LED光源。The invention belongs to the field of semiconductor light emitting technology, and specifically relates to an LED light source for rhythmic lighting.
背景技术Background technique
近年来，随着发光二极管（Light emitting diode，LED）技术的迅速发展，人们对白光LED照明产品从常规照明需求过渡至额外附加值需求，其中具有健康照明性质的LED光源受到消费者的青睐。In recent years, with the rapid development of light emitting diode (LED) technology, people's demand for white-light LED lighting products has transitioned from conventional lighting to additional value-added demand. Among them, LED light sources with healthy lighting properties are favored by consumers.
节律照明是一个新兴的概念，旨在通过照明模拟自然中光的照度，使常在室内工作的人群也能像在外界一样根据光刺激自动调节身体节律。研究发现，人体视网膜中含有的本征感光神经节细胞（intrinsically photosensitive retinal ganglion cells，ipRGCs）与人体生理节律密切相关，ipRGCs感光后能在人体产生一系列生物效应。其中一条重要的影响途径为褪黑素分泌——感光效应。ipRGCs接收到光信号后，通过视交叉上核（SCN）等神经通路将信号传递至松果体，影响着人体褪黑素的分泌。经研究发现，褪黑素的分泌与波长470-490nm的光线照度呈反比，而褪黑素的分泌刺激人体调节进入休息状态，促进睡眠。因此，通过调节光线中该特定范围波长光线的占比，可以有效地控制人体内的褪黑素分泌水平。Rhythmic lighting is an emerging concept that aims to simulate the illuminance of natural light through lighting, so that people who often work indoors can automatically adjust their body rhythms according to light stimulation just like outside. Studies have found that the intrinsically photosensitive ganglion cells contained in the human retina (intrinsically photosensitive ganglion cells) Retinal ganglion cells (ipRGCs) are closely related to human circadian rhythms, and ipRGCs can produce a series of biological effects in the human body after light exposure. One of the important influence pathways is the secretion of melatonin-the photosensitive effect. After receiving the light signal, ipRGCs transmit the signal to the pineal gland through nerve pathways such as the suprachiasmatic nucleus (SCN), which affects the secretion of melatonin in the human body. Studies have found that the secretion of melatonin is inversely proportional to the illuminance of light with a wavelength of 470-490nm, and the secretion of melatonin stimulates the body to adjust to a rest state and promote sleep. Therefore, by adjusting the proportion of light in the specific range of wavelengths in the light, the level of melatonin secretion in the human body can be effectively controlled.
通常地，白天时人处于工作状态，照明光源光谱中应含有较高百分照度的470-490nm的蓝光，抑制褪黑素的分泌，使人不易疲惫，高效工作，提高人的注意力、缩短反应时间和保持积极的情绪；休息时照明光源光谱中应含有较低百分照度的470-490nm的蓝光，促进褪黑素的分泌，使人嗜睡、疲劳困乏，更快进入休息状态。因而，节律照明工作用光源应含有较高百分照度的470-490nm的蓝光。Normally, when people are at work during the day, the spectrum of the lighting source should contain a high percentage of illuminance of 470-490nm blue light, which can inhibit the secretion of melatonin, make people less tired, work efficiently, and improve people’s attention and shortening Respond time and maintain positive emotions; during rest, the spectrum of the lighting source should contain blue light of 470-490nm with a lower percentage of illuminance, which promotes the secretion of melatonin, makes people sleepy, tired and sleepy, and enters a rest state faster. Therefore, the light source for rhythmic lighting should contain blue light of 470-490nm with a higher percentage of illuminance.
常规LED白光产品的光谱是由GaN芯片发出的蓝光和荧光粉受蓝光激发后发出的黄光耦合而成，其光谱中含有大量的415-460nm的蓝光。研究发现，过量低波长蓝光的照射对人体有害。根据标准GB/T 20145-2006/CIE S009/E:2002，当蓝光辐亮度达到标准规定的2类或者3类时，会在较短的时间或瞬间对人眼造成的伤害。高能短波蓝光具有极高能量，能够穿透晶状体直达视网膜，引起视网膜色素上皮细胞的萎缩甚至死亡。光敏感细胞的死亡将会导致视力下降甚至完全丧失，这种损坏是不可逆的。同时蓝光会使眼睛内的黄斑区毒素量增高严重威胁我们的眼底健康。因此，减少照明光源中415-460nm低波长蓝光含量是保护视力健康的有效手段。The spectrum of conventional white LED products is formed by coupling the blue light emitted by the GaN chip and the yellow light emitted by the phosphor excited by the blue light. The spectrum contains a large amount of blue light at 415-460nm. Studies have found that excessive low-wavelength blue light is harmful to humans. According to standard GB/T 20145-2006/CIE S009/E:2002, when the blue light radiance reaches Class 2 or Class 3 specified by the standard, it will cause damage to the human eyes in a short time or instant. High-energy short-wave blue light has extremely high energy and can penetrate the lens directly to the retina, causing the atrophy or even death of retinal pigment epithelial cells. The death of light-sensitive cells will result in decreased vision or even complete loss of vision, and this damage is irreversible. At the same time, blue light will increase the amount of toxins in the macular area in the eye, which seriously threatens our eye fundus health. Therefore, reducing the low-wavelength blue light content of 415-460nm in the lighting source is an effective means to protect the health of eyesight.
显色指数是指灯光对物体颜色的还原能力。根据标准GB/T 24908-2014，办公用照明LED灯的显色指数限制不低于80，因此在光源设计的过程中，也需要充分考虑到发射光谱的光质。常规LED白光产品多采用单蓝光激发黄色荧光粉耦合而成，而常见的商用荧光粉的激发波长峰值范围在447.5-455nm，针对节律照明的LED光源，如果采用单个发射波长峰值范围在447.5-455nm的蓝光芯片激发荧光粉，所得发射光谱在470-490nm处很难得到较高的百分照度；如果采用单个发射波长峰值范围在470-480nm的蓝光芯片激发荧光粉，激发效率较低，所得发射光谱中波长较高的绿光、黄光和红光占比较低，很难将显色指数提升。Color rendering index refers to the ability of light to restore the color of an object. According to the standard GB/T 24908-2014, the color rendering index of office lighting LED lamps is not less than 80, so in the process of light source design, it is also necessary to fully consider the light quality of the emission spectrum. Conventional LED white light products are mostly formed by coupling single blue excited yellow phosphors, while the excitation wavelength peak range of common commercial phosphors is 447.5-455nm. For rhythmic lighting LED light sources, if a single emission wavelength peak range is 447.5-455nm The blue light chip excites the phosphor, and it is difficult to obtain a higher percentage illuminance at the emission spectrum at 470-490nm; if a single blue chip with a peak emission wavelength range of 470-480nm is used to excite the phosphor, the excitation efficiency is low, and the resulting emission Green light, yellow light and red light with higher wavelengths in the spectrum account for a relatively low proportion, and it is difficult to increase the color rendering index.
技术问题technical problem
本发明的目的在于克服现有技术的上述不足，提供一种节律照明用的LED光源，旨在解决现有光源中415-460nm波段和470-490nm波段的照度难以满足节律照明要求的技术问题。The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an LED light source for rhythmic lighting, aiming to solve the technical problem that the illuminance of the 415-460nm waveband and the 470-490nm waveband of the existing light source cannot meet the requirements of rhythmic lighting.
技术解决方案Technical solutions
为实现上述发明目的，本发明采用的技术方案如下：In order to achieve the above-mentioned purpose of the invention, the technical solutions adopted by the present invention are as follows:
本发明一方面提供一种节律照明用的LED光源，包括蓝光芯片和被所述蓝光芯片激发的荧光粉，所述蓝光芯片包括峰值波长为447.5-452.5nm的第一芯片和峰值波长为470-480nm的第二芯片，所述荧光粉包括峰值波长位于520-540nm之间的绿粉，峰值波长位于540-570nm之间的黄粉和峰值波长位于610-640nm之间的红粉。One aspect of the present invention provides an LED light source for rhythmic lighting, comprising a blue chip and a phosphor excited by the blue chip. The blue chip includes a first chip with a peak wavelength of 447.5-452.5 nm and a peak wavelength of 470- For the second chip of 480nm, the phosphor includes green powder with a peak wavelength between 520-540nm, yellow powder with a peak wavelength between 540-570nm and red powder with a peak wavelength between 610-640nm.
有益效果Beneficial effect
本发明提供的一种节律照明用的LED光源，该LED光源通过特有波段的双蓝光芯片激发绿粉、黄粉和红粉，从而使发射光谱包含双蓝光激发的LED光谱，其光谱中含有较高百分照度的470-490nm的蓝光和较低百分照度的415-460nm的蓝光，高照度的470-490nm蓝光能够用于节律照明的需要，抑制褪黑素的分泌，提高人的工作效率，低照度的415-460nm的蓝光，可以降低蓝光危害，保护视力健康；而且，在同时增加470-490nm蓝光和降低415-460nm蓝光的基础上，光谱显色指数还高于80，能够满足节律照明的光质要求，符合GB/T 24908-2014对办公用照明LED灯显色指数的要求，因此，该LED光源在节律照明领域中具有很好的应用前景。The present invention provides an LED light source for rhythmic lighting. The LED light source excites green powder, yellow powder and red powder through a dual blue light chip with a unique wavelength band, so that the emission spectrum includes the LED spectrum excited by the dual blue light, and the spectrum contains higher 100%. Divided 470-490nm blue light and lower percent illuminance 415-460nm blue light, high illuminance 470-490nm blue light can be used for rhythmic lighting, inhibit the secretion of melatonin, improve human work efficiency, low The blue light of 415-460nm with illuminance can reduce the harm of blue light and protect the health of eyesight. Moreover, on the basis of increasing the blue light of 470-490nm and reducing the blue light of 415-460nm at the same time, the spectral color rendering index is higher than 80, which can meet the requirements of rhythmic lighting. Light quality requirements, in line with GB/T 24908-2014 has requirements for the color rendering index of office lighting LED lamps. Therefore, the LED light source has a good application prospect in the field of rhythmic lighting.
附图说明Description of the drawings
图1为本发明中ipRGC与光照波长敏感度之间的关系图。Figure 1 is a diagram of the relationship between ipRGC and the sensitivity of light wavelength in the present invention.
图2为本发明实施例1提供的节律照明LED光源光谱图。Fig. 2 is a spectrum diagram of a rhythmic illumination LED light source provided in Embodiment 1 of the present invention.
图3为本发明实施例2提供的节律照明LED光源光谱图。Fig. 3 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 2 of the present invention.
图4为本发明实施例3提供的节律照明LED光源光谱图。Fig. 4 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 3 of the present invention.
图5为本发明实施例4提供的节律照明LED光源光谱图。Fig. 5 is a spectrum diagram of a rhythmic illumination LED light source provided in Embodiment 4 of the present invention.
图6为本发明实施例5提供的节律照明LED光源光谱图。Fig. 6 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 5 of the present invention.
图7为本发明实施例6提供的节律照明LED光源光谱图。FIG. 7 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 6 of the present invention.
图8为本发明实施例7提供的节律照明LED光源光谱图。FIG. 8 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 7 of the present invention.
图9为本发明实施例8提供的节律照明LED光源光谱图。Fig. 9 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 8 of the present invention.
图10为本发明实施例9提供的节律照明LED光源光谱图。FIG. 10 is a spectrum diagram of a rhythmic lighting LED light source provided in Embodiment 9 of the present invention.
图11为本发明实施例10提供的节律照明LED光源光谱图。Fig. 11 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 10 of the present invention.
图12为本发明实施例11提供的节律照明LED光源光谱图。Fig. 12 is a spectrum diagram of a rhythmic lighting LED light source provided by Embodiment 11 of the present invention.
本发明的实施方式Embodiments of the invention
为了使本发明要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.
一方面，本发明实施例提供了一种节律照明用的LED光源，包括蓝光芯片和被所述蓝光芯片激发的荧光粉，所述蓝光芯片包括峰值波长为447.5-452.5nm的第一芯片和峰值波长为470-480nm的第二芯片，所述荧光粉包括峰值波长位于520-540nm之间的绿粉，峰值波长位于540-570nm之间的黄粉和峰值波长位于610-640nm之间的红粉。On the one hand, an embodiment of the present invention provides an LED light source for rhythmic illumination, including a blue chip and phosphor excited by the blue chip, the blue chip including a first chip with a peak wavelength of 447.5-452.5 nm and a peak wavelength The second chip with a wavelength of 470-480nm, the phosphor includes green powder with a peak wavelength between 520-540nm, yellow powder with a peak wavelength between 540-570nm and red powder with a peak wavelength between 610-640nm.
本发明实施例提供的一种节律照明用的LED光源，该LED光源通过特有波段的双蓝光芯片激发绿粉、黄粉和红粉，从而使发射光谱包含双蓝光激发的LED光谱，其光谱中含有较高百分照度的470-490nm的蓝光和较低百分照度的415-460nm的蓝光，高照度的470-490nm蓝光能够用于节律照明的需要，抑制褪黑素的分泌，提高人的工作效率，低照度的415-460nm的蓝光，可以降低蓝光危害，保护视力健康；而且，在同时增加470-490nm蓝光和降低415-460nm蓝光的基础上，光谱显色指数还高于80，能够满足节律照明的光质要求，符合GB/T 24908-2014对办公用照明LED灯显色指数的要求，因此，该LED光源在节律照明领域中具有很好的应用前景。The embodiment of the present invention provides an LED light source for rhythmic lighting. The LED light source excites green powder, yellow powder and red powder through a dual blue light chip with a unique wavelength band, so that the emission spectrum includes the LED spectrum excited by the dual blue light. High-percent illuminance 470-490nm blue light and lower illuminance 415-460nm blue light, high-illuminance 470-490nm blue light can be used for rhythmic lighting, inhibit the secretion of melatonin, and improve human work efficiency , Low illumination 415-460nm blue light can reduce blue light hazards and protect vision health; moreover, on the basis of simultaneously increasing 470-490nm blue light and reducing 415-460nm blue light, the spectral color rendering index is higher than 80, which can meet the rhythm The light quality requirements of lighting meet the requirements of GB/T 24908-2014 for the color rendering index of office lighting LED lamps. Therefore, the LED light source has a good application prospect in the field of rhythmic lighting.
本发明实施例提供的节律照明用的LED光源中，该第一芯片的发射峰值为447.5-452.5nm，该波长的蓝光处于所述蓝光芯片激发的荧光粉激发光谱的峰值范围内，可以高效激发荧光粉，补充光谱中波长较高的绿光、黄光和红光，同时降低415-460nm低波长蓝光在光谱中的占比；第二芯片的发射峰值为470-480nm，该波长的蓝光不处于所述蓝光芯片激发的荧光粉激发光谱的峰值范围内，在光谱中主要起到补充波长处于470-490nm的蓝光部分的作用。对于第二芯片，如果选择使用峰值波长位于470nm以下波段的芯片，采用同样的荧光粉搭配，芯片发射的蓝光和荧光粉发生高效耦合作用，反而会导致470-480nm波段的蓝光占比降低，因此第二芯片选择峰值波长位于470-480nm。In the LED light source for rhythmic lighting provided by the embodiment of the present invention, the emission peak of the first chip is 447.5-452.5 nm, and the blue light of this wavelength is within the peak range of the phosphor excitation spectrum excited by the blue chip, which can be efficiently excited Phosphor powder supplements the higher wavelengths of green, yellow and red light in the spectrum, while reducing the proportion of low-wavelength blue light at 415-460nm in the spectrum; the emission peak of the second chip is 470-480nm, and the blue light of this wavelength is not Within the peak range of the excitation spectrum of the phosphor excited by the blue chip, it mainly plays a role in supplementing the blue part of the spectrum with a wavelength of 470-490 nm. For the second chip, if you choose to use a chip with a peak wavelength below 470nm and use the same phosphor combination, the blue light emitted by the chip and the phosphor will be efficiently coupled, which will reduce the proportion of blue light in the 470-480nm band. The second chip selects the peak wavelength at 470-480nm.
显色指数是指灯光对物体颜色的还原能力，根据标准GB/T 24908-2014，办公用照明LED灯的显色指数限制不低于80，因此在光源设计的过程中，也需要充分考虑到发射光谱的光质。目前来说，单纯增加470-490nm的蓝光或者降低415-460nm的蓝光都有可能导致显色指数下降，难以满足国标的要求。因而在设计光源时，需要保留一定的蓝光提高显色指数。而本发明实施例提供的LED光源，在同时增加470-490nm蓝光和降低415-460nm蓝光的基础上，光谱显色指数还高于80，能够很好地满足节律照明的光质要求，符合GB/T 24908-2014对办公用照明LED灯显色指数的要求。The color rendering index refers to the ability of light to restore the color of an object. According to the standard GB/T 24908-2014, the color rendering index of office lighting LED lights is not less than 80, so in the process of light source design, it is also necessary to fully consider The light quality of the emission spectrum. At present, simply increasing the blue light of 470-490nm or reducing the blue light of 415-460nm may cause the color rendering index to decrease, which is difficult to meet the requirements of the national standard. Therefore, when designing the light source, it is necessary to reserve a certain amount of blue light to increase the color rendering index. The LED light source provided by the embodiment of the present invention, on the basis of simultaneously increasing the blue light of 470-490nm and reducing the blue light of 415-460nm, the spectral color rendering index is higher than 80, which can well meet the light quality requirements of rhythmic lighting and conform to GB /T 24908-2014 Requirements for the color rendering index of office lighting LED lamps.
图1为ipRGC与光照波长敏感度之间的关系图。从图1可以发现，ipRGC在470-490nm波长的蓝光刺激下最为敏感，在此波段照射下对褪黑素分泌的抑制能力最强。因此，提升470-490nm波长的蓝光占比能有效降低人体褪黑素分泌水平，提升人在光照环境下的工作精神和状态。Figure 1 is a graph of the relationship between ipRGC and light wavelength sensitivity. It can be found from Figure 1 that ipRGC is most sensitive to blue light stimulation with a wavelength of 470-490nm, and the ability to inhibit melatonin secretion is the strongest under irradiation at this wavelength. Therefore, increasing the proportion of blue light with a wavelength of 470-490nm can effectively reduce the human body's melatonin secretion level, and improve people's working spirit and state in a light environment.
本发明提供的节律照明用的LED光源发射光谱采用双蓝光芯片激发，所述第一芯片和第二芯片波长有明显差异，对所述荧光粉的激发效率有差别，需要精确调整所述蓝光芯片之间的强度比例、所述荧光粉的浓度比例和所述蓝光芯片与所述荧光粉之间的匹配作用以达到满足节律照明的光质要求、降低蓝光危害的要求和GB/T 24908-2014对办公用照明LED灯显色指数的要求。The emission spectrum of the LED light source for rhythm lighting provided by the present invention is excited by a dual blue chip. The wavelength of the first chip and the second chip are obviously different, and the excitation efficiency of the phosphor is different, and the blue chip needs to be precisely adjusted The intensity ratio between the intensity ratio, the concentration ratio of the phosphor, and the matching effect between the blue chip and the phosphor to meet the light quality requirements of rhythmic lighting, reduce blue light hazards and GB/T 24908-2014 requirements for color rendering index of office lighting LED lamps.
在一个实施例中，所述蓝光芯片包括多个所述第一芯片和和多个所述第二芯片，所述第一芯片和第二芯片通过串联、并联或者串联和并联相结合的方式连接。具体地，在一个实施例中，所述第一芯片与所述第二芯片工作电压差值小于或等于5%；且所述第一芯片与所述第二芯片在相同工作条件下的峰值强度比为(0.3-0.5):1.0。如果第一芯片的峰值强度过高，所得到的发射光谱中波长处于415-460nm的蓝光占比将会上升，增大蓝光危害的风险，因此，第二芯片的峰值强度大于第一芯片的峰值强度。In one embodiment, the blue light chip includes a plurality of the first chips and a plurality of the second chips, and the first chip and the second chip are connected in series, parallel, or a combination of series and parallel. . Specifically, in one embodiment, the difference between the working voltages of the first chip and the second chip is less than or equal to 5%; and the peak intensity of the first chip and the second chip under the same working conditions The ratio is (0.3-0.5):1.0. If the peak intensity of the first chip is too high, the proportion of blue light with a wavelength of 415-460nm in the obtained emission spectrum will increase, increasing the risk of blue light damage. Therefore, the peak intensity of the second chip is greater than that of the first chip strength.
在一个实施例中，所述第一芯片的峰值波长位于447.5-452.5nm，所述第二芯片的峰值波长位于472.5-477.5nm。该峰值波长的用双蓝光芯片激发，得到的激发效果更佳。In one embodiment, the peak wavelength of the first chip is 447.5-452.5 nm, and the peak wavelength of the second chip is 472.5-477.5 nm. The peak wavelength is excited by dual blue chips, and the excitation effect is better.
在一个实施例中，以所述荧光粉的总重量为100%计，所述绿粉与黄粉的质量百分含量之和为93-97%，所述红粉的质量百分含量为3-7%。更进一步地，以所述荧光粉的总重量为100%计，其中，所述荧光粉中的绿粉质量百分含量为17-85%，黄粉的质量百分含量之和为8-80%，所述红粉的质量百分含量为3-7%。In one embodiment, based on the total weight of the phosphor as 100%, the sum of the mass percentages of the green powder and the yellow powder is 93-97%, and the mass percentage of the red powder is 3-7 %. Further, based on the total weight of the phosphor as 100%, the mass percentage of green powder in the phosphor is 17-85%, and the sum of the mass percentage of yellow powder is 8-80% , The mass percentage of the red powder is 3-7%.
在一个实施例中，所述峰值波长位于520-540nm之间的绿粉为稀土掺杂的钇铝石榴石型荧光粉；所述峰值波长位于540-570nm之间的黄粉为稀土掺杂的铝酸盐型荧光粉；峰值波长位于610-640nm之间的红粉为稀土掺杂的硅基氮化物型荧光粉。具体地，所述稀土掺杂的钇铝石榴石型荧光粉中，掺杂的稀土元素包括Ce、Ga、Lu、Dy、Tb、Ln、Eu等稀土元素中的一种或多种。所述稀土掺杂的铝酸盐型荧光粉中，掺杂的稀土元素包括Ce、Ga、Lu、Dy、Tb、Ln、Eu等稀土元素中的一种或多种。所述稀土掺杂的硅基氮化物型荧光粉中，包括Ca、Sr、Ba等碱土金属元素中的一种或多种，并包括Eu、Tm、Dy等掺杂稀土元素中的一种或多种。而进一步地，作为有一个优选的实施方式，所述绿色荧光粉优选为Lu 3Al 5O 12：Ce，所述黄色荧光粉优选为Y 3(Al,Ga) 5O 12:Ce，所述红色荧光粉优选为（Sr,Ca）AlSiN 3:Eu。该系列荧光粉结构稳定性，且荧光粉之间匹配性能更好，同时具有更高的外量子效率。 In one embodiment, the green powder with a peak wavelength between 520-540 nm is a rare-earth-doped yttrium aluminum garnet phosphor; the yellow powder with a peak wavelength between 540-570 nm is a rare-earth-doped aluminum Salt-type phosphor; the red powder with a peak wavelength between 610-640nm is a rare-earth-doped silicon-based nitride phosphor. Specifically, in the rare earth doped yttrium aluminum garnet type phosphor, the doped rare earth elements include one or more of the rare earth elements such as Ce, Ga, Lu, Dy, Tb, Ln, and Eu. In the rare earth doped aluminate type phosphor, the doped rare earth elements include one or more of the rare earth elements such as Ce, Ga, Lu, Dy, Tb, Ln, Eu. The rare earth-doped silicon-based nitride phosphor includes one or more of alkaline earth metal elements such as Ca, Sr, and Ba, and includes one or more of doped rare earth elements such as Eu, Tm, and Dy. Many kinds. Furthermore, as a preferred embodiment, the green phosphor is preferably Lu 3 Al 5 O 12 :Ce, and the yellow phosphor is preferably Y 3 (Al,Ga) 5 O 12 :Ce. The red phosphor is preferably (Sr,Ca)AlSiN 3 :Eu. This series of phosphors have stable structure, better matching performance between phosphors, and higher external quantum efficiency.
在一个实施例中，荧光粉与硅胶混合制成荧光胶，再将荧光胶均匀地涂覆于芯片周围。芯片与荧光胶置于具有特定碗杯形状的二极管支架内，并将芯片与支架进行电气连接。In one embodiment, fluorescent powder and silica gel are mixed to form fluorescent glue, and then the fluorescent glue is evenly coated around the chip. The chip and the fluorescent glue are placed in a diode holder with a specific bowl shape, and the chip and the holder are electrically connected.
本发明提供的LED光谱是一种双蓝光激发LED光谱，通过发光芯片与荧光粉之间的光谱耦合，在保证光谱的显色指数高于80的前提下，LED光源的光谱中470-490nm波段的蓝光含量可控，并在415-460nm波段具有较低的蓝光发射。具体地，能使470-490nm波段的蓝光光通量占比大于10%，较常规照明产品升高150%以上；415-460nm波段的蓝光光通量占比小于12%，较常规照明产品减少40%以上。这样的光谱可以调节人体机能，抑制褪黑素分泌，使人不易疲惫，高效工作，同时该光谱可以减少蓝光危害，且该光谱显色指数高于80，可以满足国标的要求。The LED spectrum provided by the present invention is a dual blue excitation LED spectrum. Through the spectral coupling between the light-emitting chip and the phosphor, under the premise that the color rendering index of the spectrum is higher than 80, the spectrum of the LED light source is in the 470-490nm band The blue light content is controllable, and has low blue light emission in the 415-460nm band. Specifically, the blue light flux in the 470-490nm band can account for more than 10%, which is more than 150% higher than conventional lighting products; the blue light flux in the 415-460nm band accounts for less than 12%, which is more than 40% less than conventional lighting products. Such a spectrum can regulate human body functions, inhibit melatonin secretion, make people less tired, and work efficiently. At the same time, the spectrum can reduce the harm of blue light, and the color rendering index of the spectrum is higher than 80, which can meet the requirements of the national standard.
本发明先后进行过多次试验，现举一部分试验结果作为参考对发明进行进一步详细描述，下面结合具体实施例进行详细说明。The present invention has been tested for many times. A part of the test results will be used as a reference to further describe the invention in detail, and the following will be described in detail with reference to specific examples.
实施例1Example 1
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为4000K，显色指数大于80。A dual blue excitation LED light source: the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.5:1.0，电压差值为5%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.5:1.0, and the voltage difference is 5%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占52%，稀土掺杂的铝酸盐型荧光粉占41%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 52%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 41%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
该双蓝光激发LED光源光谱图如图2所示。The spectrum of the dual blue excitation LED light source is shown in Figure 2.
实施例2Example 2
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波位于472.5-477.5nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为5%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.4:1.0, and the voltage difference is 5%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占35%，稀土掺杂的铝酸盐型荧光粉占59%，稀土掺杂的硅基氮化物型荧光粉占6%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 35%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 59%, and rare-earth-doped silicon-based nitride phosphors accounted for 6%.
该双蓝光激发LED光源光谱图如图3所示。The spectrum of the dual blue excitation LED light source is shown in Figure 3.
实施例3Example 3
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5700K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为4%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.4:1.0, and the voltage difference is 4%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占37%，稀土掺杂的稀土铝酸盐型荧光粉占57%，稀土掺杂的硅基氮化物型荧光粉占6%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 37%, and the rare-earth-doped rare earth Aluminate phosphors accounted for 57%, and rare earth doped silicon-based nitride phosphors accounted for 6%.
该双蓝光激发LED光源光谱图如图4所示。The spectrum of the dual blue light excitation LED light source is shown in Figure 4.
实施例4Example 4
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为6500K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.3:1.0，电压差值为3%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.3:1.0, and the voltage difference is 3%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占17%，稀土掺杂的铝酸盐型荧光粉占80%，稀土掺杂的硅基氮化物型荧光粉占3%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 17%, and the rare-earth-doped aluminum Salt-type phosphor accounts for 80%, and rare-earth-doped silicon-based nitride phosphor accounts for 3%.
该双蓝光激发LED光源光谱图如图5所示。The spectrum of the dual blue excitation LED light source is shown in Figure 5.
实施例5Example 5
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为4000K，显色指数大于80。A dual blue excitation LED light source: the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.5:1.0，电压差值为5%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.5:1.0, and the voltage difference is 5%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占85%，稀土掺杂的铝酸盐型荧光粉占9%，稀土掺杂的硅基氮化物型荧光粉占6%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 85%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 9%, and rare-earth-doped silicon-based nitride phosphors accounted for 6%.
该双蓝光激发LED光源光谱图如图6所示。The spectrum of the dual blue excitation LED light source is shown in Figure 6.
实施例6Example 6
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为5%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.4:1.0, and the voltage difference is 5%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占81%，稀土掺杂的铝酸盐型荧光粉占12%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 81%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 12%, and the rare earth-doped silicon-based nitride phosphor accounts for 7%.
该双蓝光激发LED光源光谱图如图7所示。The spectrum of the dual blue excitation LED light source is shown in Figure 7.
实施例7Example 7
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5700K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为4%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.4:1.0, and the voltage difference is 4%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占84%，稀土掺杂的铝酸盐型荧光粉占9%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source further includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 84%, and the rare-earth-doped aluminum Salt-type phosphors account for 9%, and rare-earth-doped silicon-based nitride phosphors account for 7%.
该双蓝光激发LED光源光谱图如图8所示。The spectrum of the dual blue light excitation LED light source is shown in Figure 8.
实施例8Example 8
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为6500K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于472.5-477.5nm的蓝光芯片，峰值强度比为0.3:1.0，电压差值为3%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, and the second chip is a blue chip with a peak wavelength of 472.5-477.5nm. The peak intensity ratio It is 0.3:1.0, and the voltage difference is 3%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占85%，稀土掺杂的铝酸盐型荧光粉占10%，稀土掺杂的硅基氮化物型荧光粉占5%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 85%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 10%, and the rare earth-doped silicon-based nitride phosphor accounts for 5%.
该双蓝光激发LED光源光谱图如图9所示。The spectrogram of the dual blue excitation LED light source is shown in Figure 9.
实施例9Example 9
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为4000K，显色指数大于80。A dual blue excitation LED light source: the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于475-480nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为5%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.4:1.0, the voltage difference is 5%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占47%，稀土掺杂的铝酸盐型荧光粉占46%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 47%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 46%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
该双蓝光激发LED光源光谱图如图10所示。The spectrum of the dual blue excitation LED light source is shown in Figure 10.
实施例10Example 10
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于475-480nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为4%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.4:1.0, the voltage difference is 4%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占46%，稀土掺杂的铝酸盐型荧光粉占47%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 46%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 47%, and rare-earth-doped silicon-based nitride phosphors accounted for 7%.
该双蓝光激发LED光源光谱图如图11所示。The spectrum of the dual blue excitation LED light source is shown in Figure 11.
实施例11Example 11
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于475-480nm的蓝光芯片，峰值强度比为0.5:1.0，电压差值为4%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 475-480nm, and the peak intensity ratio is 0.5:1.0, the voltage difference is 4%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占66%，稀土掺杂的铝酸盐型荧光粉占30%，稀土掺杂的硅基氮化物型荧光粉占4%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 66%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 30%, and the rare earth-doped silicon-based nitride phosphor accounts for 4%.
该双蓝光激发LED光源光谱图如图12所示。The spectrogram of the dual blue excitation LED light source is shown in Figure 12.
对比例1Comparative example 1
一种单蓝光激发LED常规照明光源：所述光源的蓝光激发LED发射光谱的色温为4000K，显色指数大于80。A conventional light source of single blue excitation LED: the color temperature of the emission spectrum of the blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
所述蓝光激发LED光源包括一个蓝光芯片，所述芯片为峰值波长位于455-457.5nm的蓝光芯片。The blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 455-457.5 nm.
所述单蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占59%，稀土掺杂的铝酸盐型荧光粉占36%，稀土掺杂的硅基氮化物型荧光粉占5%。The single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 59%, and the rare-earth-doped aluminum The acid salt phosphor accounts for 36%, and the rare earth-doped silicon-based nitride phosphor accounts for 5%.
对比例2Comparative example 2
一种单蓝光激发LED常规照明光源：所述光源的蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A conventional light source of single blue excitation LED: the color temperature of the emission spectrum of the blue excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述蓝光激发LED光源包括一个蓝光芯片，所述芯片为峰值波长位于452.5-455nm的蓝光芯片。The blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
所述单蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占69%，稀土掺杂的铝酸盐型荧光粉占25%，稀土掺杂的硅基氮化物型荧光粉占6%。The single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 69%, and the rare-earth-doped aluminum Salt-type phosphors account for 25%, and rare-earth-doped silicon-based nitride phosphors account for 6%.
对比例3Comparative example 3
一种单蓝光激发LED常规照明光源：所述光源的蓝光激发LED发射光谱的色温为5700K，显色指数大于80。A conventional lighting source of single blue excitation LED: the color temperature of the emission spectrum of the blue excitation LED of the light source is 5700K, and the color rendering index is greater than 80.
所述蓝光激发LED光源包括一个蓝光芯片，所述芯片为峰值波长位于452.5-455nm的蓝光芯片。The blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
所述单蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占86%，稀土掺杂的铝酸盐型荧光粉占9%，稀土掺杂的硅基氮化物型荧光粉占5%。The single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 86%, and the rare-earth-doped aluminum Salt-type phosphors accounted for 9%, and rare-earth-doped silicon-based nitride phosphors accounted for 5%.
对比例4Comparative example 4
一种单蓝光激发LED常规照明光源：所述光源的蓝光激发LED发射光谱的色温为6500K，显色指数大于80。A conventional lighting source of single blue excitation LED: the color temperature of the emission spectrum of the blue excitation LED of the light source is 6500K, and the color rendering index is greater than 80.
所述蓝光激发LED光源包括一个蓝光芯片，所述芯片为峰值波长位于452.5-455nm的蓝光芯片。The blue light excitation LED light source includes a blue chip, and the chip is a blue chip with a peak wavelength of 452.5-455 nm.
所述单蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占69%，稀土掺杂的铝酸盐型荧光粉占25%，稀土掺杂的硅基氮化物型荧光粉占6%。The single blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 69%, and the rare-earth-doped aluminum Salt-type phosphors account for 25%, and rare-earth-doped silicon-based nitride phosphors account for 6%.
对比例5Comparative example 5
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为4000K，显色指数大于80。A dual blue excitation LED light source: the color temperature of the emission spectrum of the dual blue excitation LED of the light source is 4000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于457.5-462.5nm的蓝光芯片，峰值强度比为0.4:1.0，电压差值为3%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 457.5-462.5nm, and the peak intensity ratio It is 0.4:1.0, and the voltage difference is 3%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占86%，稀土掺杂的铝酸盐型荧光粉占10%，稀土掺杂的硅基氮化物型荧光粉占4%。The dual blue light excitation LED light source further includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 86%, and the rare-earth-doped aluminum Salt-type phosphors account for 10%, and rare-earth-doped silicon-based nitride phosphors account for 4%.
对比例6Comparative example 6
一种双蓝光激发LED光源：所述光源的双蓝光激发LED发射光谱的色温为5000K，显色指数大于80。A dual blue light excitation LED light source: the color temperature of the emission spectrum of the dual blue light excitation LED of the light source is 5000K, and the color rendering index is greater than 80.
所述双蓝光激发LED光源包括两个蓝光芯片，所述第一芯片为峰值波长位于447.5-452.5nm的蓝光芯片，所述第二芯片为峰值波长位于457.5-462.5nm的蓝光芯片，峰值强度比为0.8:1.0，电压差值为3%。The dual blue excitation LED light source includes two blue chips, the first chip is a blue chip with a peak wavelength of 447.5-452.5nm, the second chip is a blue chip with a peak wavelength of 457.5-462.5nm, and the peak intensity ratio It is 0.8:1.0, and the voltage difference is 3%.
所述双蓝光激发LED光源还包括荧光粉，以所述荧光粉的总重量为100%计，所述荧光粉中稀土掺杂的钇铝石榴石型荧光粉占88%，稀土掺杂的铝酸盐型荧光粉占5%，稀土掺杂的硅基氮化物型荧光粉占7%。The dual blue light excitation LED light source also includes phosphors. Based on the total weight of the phosphors as 100%, the rare-earth-doped yttrium aluminum garnet phosphor accounts for 88%, and the rare-earth-doped aluminum Salt-type phosphor accounts for 5%, and rare-earth-doped silicon-based nitride phosphor accounts for 7%.
性能测试Performance Testing
上述实施例和对比例的LED光源测试数据如下表1所示：The LED light source test data of the above-mentioned embodiment and comparative example are shown in Table 1 below:
表1Table 1
项目 project 峰值波长/nm Peak wavelength/nm 色温/K Color temperature/K 显色指数 Color rendering index 470-490nm 光通量占比 470-490nm Percentage of luminous flux 415-460nm 光通量占比 415-460nm Percentage of luminous flux
实施例1 Example 1 474.4 474.4 4007 4007 82.8 82.8 11.85% 11.85% 5.43% 5.43%
实施例2 Example 2 473.0 473.0 4942 4942 81.7 81.7 14.08% 14.08% 6.98% 6.98%
实施例3 Example 3 474.0 474.0 5653 5653 82.4 82.4 15.33% 15.33% 9.08% 9.08%
实施例4 Example 4 472.7 472.7 6324 6324 82.3 82.3 15.81% 15.81% 8.44% 8.44%
实施例5 Example 5 474.4 474.4 4134 4134 83.3 83.3 11.07% 11.07% 6.57% 6.57%
实施例6 Example 6 474.2 474.2 4927 4927 82.6 82.6 13.19% 13.19% 8.35% 8.35%
实施例7 Example 7 473.0 473.0 5767 5767 83.9 83.9 14.20% 14.20% 10.79% 10.79%
实施例8 Example 8 472.8 472.8 6432 6432 82.8 82.8 14.82% 14.82% 11.04% 11.04%
实施例9 Example 9 479.4 479.4 4024 4024 81.9 81.9 12.64% 12.64% 5.73% 5.73%
实施例10 Example 10 478.7 478.7 4983 4983 82.4 82.4 14.10% 14.10% 8.98% 8.98%
实施例11 Example 11 478.7 478.7 5003 5003 83.0 83.0 14.46% 14.46% 8.63% 8.63%
对比例1 Comparative example 1 452.4 452.4 4007 4007 81.4 81.4 3.60% 3.60% 11.83% 11.83%
对比例2 Comparative example 2 451.5 451.5 5087 5087 82.0 82.0 4.52% 4.52% 16.49% 16.49%
对比例3 Comparative example 3 450.8 450.8 5685 5685 82.1 82.1 4.64% 4.64% 19.21% 19.21%
对比例4 Comparative example 4 449.0 449.0 6513 6513 81.5 81.5 4.38% 4.38% 22.48% 22.48%
对比例5 Comparative example 5 445.7 445.7 5003 5003 92.4 92.4 5.62% 5.62% 12.18% 12.18%
对比例6 Comparative example 6 610.6 610.6 4014 4014 92.3 92.3 4.82% 4.82% 9.47% 9.47%
由表1可见，相较于对比例，本发明实施例提供的双蓝光LED光谱方案在显色指数高于80和色温相同的情况下，峰值波长位于480nm左右，并且470-490nm蓝光的光通量占比大幅提升150%以上；同时415-460nm蓝光的光通量占比大幅下降40%以上。It can be seen from Table 1 that compared to the comparative example, the dual blue LED spectral scheme provided by the embodiment of the present invention has a peak wavelength of about 480 nm when the color rendering index is higher than 80 and the color temperature is the same, and the luminous flux of blue light at 470-490 nm accounts for The ratio is greatly increased by more than 150%; at the same time, the luminous flux of 415-460nm blue light accounts for a significant drop of more than 40%.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims (10)

  1. 一种节律照明用的LED光源，包括蓝光芯片和被所述蓝光芯片激发的荧光粉，其特征在于，所述蓝光芯片包括峰值波长为447.5-452.5nm的第一芯片和峰值波长为470-480nm的第二芯片，所述荧光粉包括峰值波长位于520-540nm之间的绿粉，峰值波长位于540-570nm之间的黄粉和峰值波长位于610-640nm之间的红粉。 An LED light source for rhythmic lighting, comprising a blue chip and phosphor excited by the blue chip, wherein the blue chip includes a first chip with a peak wavelength of 447.5-452.5nm and a peak wavelength of 470-480nm In the second chip, the phosphor includes green powder with a peak wavelength between 520-540nm, yellow powder with a peak wavelength between 540-570nm and red powder with a peak wavelength between 610-640nm.
  2. 如权利要求1所述的LED光源，其特征在于，所述蓝光芯片包括多个所述第一芯片和和多个所述第二芯片，所述第一芯片和第二芯片通过串联、并联或者串联和并联相结合的方式连接。 The LED light source of claim 1, wherein the blue light chip comprises a plurality of the first chip and a plurality of the second chip, and the first chip and the second chip are connected in series, in parallel, or A combination of series and parallel connection.
  3. 如权利要求1所述的LED光源，其特征在于，所述第一芯片与所述第二芯片工作电压差值小于或等于5%；且所述第一芯片与所述第二芯片在相同工作条件下的峰值强度比为(0.3-0.5):1.0。 The LED light source of claim 1, wherein the working voltage difference between the first chip and the second chip is less than or equal to 5%; and the first chip and the second chip are working at the same The peak intensity ratio under the conditions is (0.3-0.5):1.0.
  4. 如权利要求1所述的LED光源，其特征在于，所述第一芯片的峰值波长位于447.5-452.5nm，所述第二芯片的峰值波长位于472.5-477.5nm。 5. The LED light source according to claim 1, wherein the peak wavelength of the first chip is 447.5-452.5 nm, and the peak wavelength of the second chip is 472.5-477.5 nm.
  5. 如权利要求1所述的LED光源，其特征在于，以所述荧光粉的总重量为100%计，所述绿粉与黄粉的质量百分含量之和为93-97%，所述红粉的质量百分含量为3-7%。 The LED light source according to claim 1, characterized in that, based on the total weight of the phosphor as 100%, the sum of the mass percentages of the green powder and the yellow powder is 93-97%, and the weight of the red powder The mass percentage content is 3-7%.
  6. 如权利要求5所述的LED光源，其特征在于，以所述荧光粉的总重量为100%计，所述荧光粉中的绿粉质量百分含量为17-85%，黄粉的质量百分含量之和为8-80%，红粉的质量百分含量为3-7%。 The LED light source according to claim 5, characterized in that, based on the total weight of the phosphor as 100%, the mass percentage of green powder in the phosphor is 17-85%, and the mass percentage of the yellow powder The sum of the content is 8-80%, and the mass percentage of the red powder is 3-7%.
  7. 如权利要求1-6任一项所述的LED光源，其特征在于，所述绿粉为稀土掺杂的钇铝石榴石型荧光粉；和/或，所述黄粉为稀土掺杂的铝酸盐型荧光粉；和/或， The LED light source according to any one of claims 1 to 6, wherein the green powder is a rare earth-doped yttrium aluminum garnet type phosphor; and/or, the yellow powder is a rare earth-doped aluminate Salt phosphor; and/or,
    所述红粉为稀土掺杂的硅基氮化物型荧光粉。The red powder is a silicon-based nitride type phosphor doped with rare earth.
  8. 如权利要求7所述的LED光源，其特征在于，所述稀土掺杂的钇铝石榴石型荧光粉中的掺杂稀土元素包括Ce、Ga、Lu、Dy、Tb、Ln和Eu中的一种或多种。 The LED light source according to claim 7, wherein the doped rare earth element in the rare earth doped yttrium aluminum garnet phosphor includes one of Ce, Ga, Lu, Dy, Tb, Ln, and Eu Kind or more.
  9. 如权利要求7所述的LED光源，其特征在于，所述稀土掺杂的铝酸盐型荧光粉中的掺杂稀土元素包括Ce、Ga、Lu、Dy、Tb、Ln和Eu中的一种或多种。 The LED light source according to claim 7, wherein the doped rare earth element in the rare earth doped aluminate phosphor includes one of Ce, Ga, Lu, Dy, Tb, Ln and Eu Or multiple.
  10. 如权利要求7所述的LED光源，其特征在于，所述稀土掺杂的硅基氮化物型荧光粉含有Ca、Sr和Ba中的一种或多种碱土金属元素，且含有Eu、Tm和Dy中的一种或多种掺杂的稀土元素。 The LED light source of claim 7, wherein the rare earth-doped silicon-based nitride phosphor contains one or more alkaline earth metal elements among Ca, Sr and Ba, and contains Eu, Tm and One or more rare earth elements doped in Dy.
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