WO2020248748A1 - Source de lumière à del pour éclairage rythmé - Google Patents

Source de lumière à del pour éclairage rythmé 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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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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Xuyu Optoelectronics Shenzhen Co Ltd
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Xuyu Optoelectronics Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/851—Wavelength conversion means
    • H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
    • H10H20/8512—Wavelength conversion materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W90/00—Package configurations

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

L'invention concerne une source de lumière à DEL pour éclairage rythmé, relevant du domaine technique de l'émission de lumière par semi-conducteur et comprenant des puces à lumière bleue et un phosphore qui est excité par les puces à lumière bleue, lesdites puces à lumière bleue comprenant une première puce ayant une longueur d'onde de crête de 447,5 à 452,5 nm et une seconde puce ayant une longueur d'onde de crête de 470 à 480 nm, le phosphore comprenant une poudre verte ayant une longueur d'onde de crête située entre 520 et 540 nm, une poudre jaune ayant une longueur d'onde de crête située entre 540 et 570 nm et une poudre rouge ayant une longueur d'onde de crête située entre 610 et 640 nm. Cette source de lumière à DEL augmente la lumière bleue de 470-490 nm et réduit la lumière bleue de 415-460 nm simultanément, présente un indice de rendu des couleurs spectrales supérieur à 80 et permet de satisfaire aux exigences de qualité de lumière pour un éclairage rythmé et aux exigences de la norme GB/T 24908-2014 pour l'indice de rendu des couleurs d'une lampe à DEL d'éclairage de bureau.
PCT/CN2020/089164 2020-01-03 2020-05-08 Source de lumière à del pour éclairage rythmé Ceased WO2020248748A1 (fr)

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CN202010006140.5 2020-01-03
CN202010006140.5A CN111162153B (zh) 2020-01-03 2020-01-03 节律照明用的led光源

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WO2020248748A1 true WO2020248748A1 (fr) 2020-12-17

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