CN110504348A - White light LEDs and Healthy Lighting lamps and lanterns - Google Patents
White light LEDs and Healthy Lighting lamps and lanterns Download PDFInfo
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- 241001465382 Physalis alkekengi Species 0.000 title abstract 2
- 239000000843 powder Substances 0.000 claims abstract description 176
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000000463 material Substances 0.000 claims abstract description 78
- 230000005284 excitation Effects 0.000 claims abstract description 23
- 108010043121 Green Fluorescent Proteins Proteins 0.000 claims description 35
- 150000004767 nitrides Chemical class 0.000 claims description 19
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 14
- XPIIDKFHGDPTIY-UHFFFAOYSA-N F.F.F.P Chemical group F.F.F.P XPIIDKFHGDPTIY-UHFFFAOYSA-N 0.000 claims description 8
- 150000004645 aluminates Chemical class 0.000 claims description 7
- 229910020440 K2SiF6 Inorganic materials 0.000 claims description 6
- 150000003568 thioethers Chemical class 0.000 claims description 6
- 229910052765 Lutetium Inorganic materials 0.000 claims description 4
- SBFDPWWVJYLRGG-UHFFFAOYSA-N [N]=O.[P] Chemical group [N]=O.[P] SBFDPWWVJYLRGG-UHFFFAOYSA-N 0.000 claims description 4
- 150000002222 fluorine compounds Chemical class 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 4
- 238000005286 illumination Methods 0.000 abstract description 43
- 230000006378 damage Effects 0.000 abstract description 7
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000009877 rendering Methods 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 9
- YJPIGAIKUZMOQA-UHFFFAOYSA-N Melatonin Natural products COC1=CC=C2N(C(C)=O)C=C(CCN)C2=C1 YJPIGAIKUZMOQA-UHFFFAOYSA-N 0.000 description 3
- DRLFMBDRBRZALE-UHFFFAOYSA-N melatonin Chemical compound COC1=CC=C2NC=C(CCNC(C)=O)C2=C1 DRLFMBDRBRZALE-UHFFFAOYSA-N 0.000 description 3
- 229960003987 melatonin Drugs 0.000 description 3
- 210000001525 retina Anatomy 0.000 description 3
- 230000028327 secretion Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 230000008832 photodamage Effects 0.000 description 2
- 208000035719 Maculopathy Diseases 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000000695 crystalline len Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000002919 epithelial cell Anatomy 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 208000002780 macular degeneration Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
- H01L33/504—Elements with two or more wavelength conversion materials
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Abstract
The invention belongs to technical field of semiconductor illumination, and in particular to a kind of white light LEDs and Healthy Lighting lamps and lanterns.The white light LEDs include blue chip and the fluorescent material that is excited by the blue chip, the peak wavelength of blue chip is 470-480nm, fluorescent material includes being suitble to the peak wavelength of 470-480nm excitation to be located at the yellow fluorescent powder of 540nm-560nm and peak wavelength is located at the red fluorescence powder of 600-660nm or fluorescent material includes that the peak wavelength that excites of suitable 470-480nm is located at the green emitting phosphor of 500-540nm and peak wavelength is located at the red fluorescence powder of 600-660nm.White LED Blue Light harm is low, and shows high-quantum efficiency under 470-480nm excitation, under conditions of guaranteeing that LED high shows finger, is able to ascend the light efficiency of white light LEDs.
Description
Technical Field
The invention belongs to the technical field of semiconductor illumination, and particularly relates to a white light LED and a lamp for health illumination.
Background
With the rapid development of Light Emitting Diodes (LEDs), the LED lighting industry has increased from pursuit of Light efficiency, energy saving and cost to demand for Light quality, Light health, photobiological safety and Light environment. Especially, in recent years, the problems of blue light harm, human body rhythm disorder and human eye retina damage caused by the LED are gradually shown, so that the industry is not aware of the popularization of healthy illumination.
The short-wave blue light (430-450nm) has extremely high energy and can penetrate through the crystalline lens to reach the retina. The blue light irradiates the retina to generate free radicals, the free radicals can cause the retinal pigment epithelial cells to die, the die of the epithelial cells can cause the light-sensitive cells to lack nutrients, thus causing the visual impairment, causing the maculopathy, and further easily causing the myopia.
In the application fields of education illumination and office illumination, the LED which realizes white light by exciting the fluorescent powder by the long-wave blue light has very important significance in reducing the harm of the blue light and properly inhibiting the secretion of the melatonin. However, in the existing fluorescent powder scheme, under the excitation of long wave, the quantum efficiency is too low, and the fluorescent powder is not suitable for industrial application; therefore, the prior art is in need of improvement.
Disclosure of Invention
The invention aims to provide a white light LED and a lamp for health illumination, and aims to solve the technical problems that the short-wave blue light excitation is too strong and the quantum efficiency and the light efficiency of the long-wave blue light excitation are low in the conventional white light LED.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a white light LED, which comprises a blue light chip and a fluorescent material excited by the blue light chip, wherein the peak wavelength of the blue light chip is 470-480nm, the fluorescent material comprises yellow fluorescent powder with the peak wavelength suitable for 470-480nm excitation and positioned at 540-560 nm and red fluorescent powder with the peak wavelength positioned at 600-660nm, or the fluorescent material comprises green fluorescent powder with the peak wavelength suitable for 470-480nm excitation and positioned at 500-540nm and red fluorescent powder with the peak wavelength positioned at 600-660 nm.
The invention provides a white light LED which realizes healthy illumination by exciting a fluorescent material by a blue light chip with a peak wavelength of 470-480nm, wherein the peak wavelength of the blue light chip is longer, the blue light damage is lower than that of short-wave blue light, the blue light damage of a light source can reach the Rg0 standard, the peak wave band of 470-480nm can inhibit the secretion of melatonin, the excitation state can be kept favorably for learning and working, yellow fluorescent powder with the peak wavelength of 540nm-560nm in the fluorescent material is matched with red fluorescent powder with the peak wavelength of 600-660nm, or green fluorescent powder with the peak wavelength of 500-540nm is matched with red fluorescent powder with the peak wavelength of 600-660nm, the high quantum efficiency can be displayed under the excitation of 470-480nm, and the light efficiency of the white light LED can be improved under the condition of ensuring high color rendering index of the LED.
In another aspect, the invention provides a lamp for health lighting, which comprises the white light LED.
The lamp for health illumination provided by the invention is provided with the special white light LED, so that the lamp for health illumination has the advantages of high quantum efficiency, high luminous efficiency and low luminous efficiency blue light harm, is beneficial to learning and working, can keep an excited state, and has good application in the application fields of education illumination and office illumination.
Drawings
Fig. 1 is a schematic structural diagram of a white LED according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On one hand, the embodiment of the invention provides a white light LED, which comprises a blue light chip and a fluorescent material excited by the blue light chip, wherein the peak wavelength of the blue light chip is 470-480nm, the fluorescent material comprises yellow fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 540-560 nm and red fluorescent powder with the peak wavelength located at 600-660nm, or the fluorescent material comprises green fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 500-540nm and red fluorescent powder with the peak wavelength located at 600-660 nm.
The embodiment of the invention provides a white light LED which realizes healthy illumination by exciting a fluorescent material by a blue light chip with the peak wavelength of 470-480nm, wherein the peak wavelength of the blue light chip is longer, compared with the short-wave blue light, the harm of the blue light of the light source is low, the harm of the blue light of the light source can reach the Rg0 standard, and the peak wave band of 470-480nm can inhibit the secretion of melatonin, is favorable for learning and working and can keep the excitation state, the yellow fluorescent powder with the peak wavelength of 540nm-560nm in the fluorescent material is matched with the red fluorescent powder with the peak wavelength of 600-660nm, or the green fluorescent powder with the peak wavelength of 500-540nm and the red fluorescent powder with the peak wavelength of 600-660nm are matched, so that high quantum efficiency can be displayed under the excitation of 470-480nm, and the light efficiency of the white light LED can be improved under the condition of ensuring high color rendering index of the LED.
In one embodiment, the fluorescent material in the white LED may form a light emitting layer, which is excited by the blue LED chip. The blue light chip may be located inside the package support, for example, fixed at the bottom of the package support, the light emitting surface of the blue light chip faces upward, and the upper surface of the light emitting surface of the blue light chip may be covered with the fluorescent material to form a light emitting layer, which has a structure shown in fig. 1 (the package support is not shown). In addition, the number of the blue light chips can be 1 or more; a distance may be allowed between the blue light chip and the light emitting layer, for example, a preset distance may be allowed between the blue light chip and the light emitting layer, the preset distance may be a range of values, and other structures or material layers may be further disposed between the blue light chip and the light emitting layer. As one example, the light emitting material layer on the blue light chip may have a planar structure or an arc structure. The beam angle emanating from the optical device may be a number of angles, such as 15 °, 30 °, 60 °, 120 °, 150 °, and so forth.
Specifically, for the matching of the yellow phosphor with the peak wavelength of 540nm-560nm and the red phosphor with the peak wavelength of 600-660nm, when the excitation is carried out at 470-480nm, the color rendering index of the yellow phosphor with the specific peak wavelength and the red phosphor with the specific peak wavelength can be more than 80. And the green fluorescent powder with the peak wavelength of 500-540nm is matched with the red fluorescent powder with the peak wavelength of 600-660nm, and when the fluorescent powder is excited by 470-480nm, the color rendering index of the green fluorescent powder with the special peak wavelength matched with the red fluorescent powder with the special peak wavelength can be more than 90.
In one embodiment, the fluorescent material is composed of yellow fluorescent powder with a peak wavelength of 540nm-560nm and red fluorescent powder with a peak wavelength of 600-660 nm. In another embodiment, the fluorescent material is composed of green fluorescent powder with the peak wavelength at 500-540nm and red fluorescent powder with the peak wavelength at 600-660 nm.
Furthermore, the peak wavelength of the blue chip in the white LED is preferably 475-. Or, the peak wavelength of the blue chip in the white light LED is preferably 475-480nm, and the fluorescent material is composed of green fluorescent powder with the peak wavelength located at 520-540nm and red fluorescent powder with the peak wavelength located at 610-630 nm.
In the embodiment that the fluorescent material in the white light LED consists of yellow fluorescent powder and red fluorescent powder, the yellow fluorescent powder is Ce3+Activated aluminate phosphor and Ce3+Any one of activated nitride phosphors; the red fluorescent powder is Eu2+Activated nitride phosphor, Eu3+Activated oxide phosphor and Mn4+Any one of activated fluoride phosphors; the excitation efficiency of the yellow phosphor and the red phosphor is relatively high under the 470-480nm excitation condition.
In one embodiment, the mass ratio of the yellow phosphor to the red phosphor in the phosphor material is 1: (0.1-0.5). The color temperature of the white light LED can be controlled within the range of 2000K-6500K within the mass ratio range of the yellow fluorescent powder to the red fluorescent powder.
For the above yellow phosphor and red phosphor: the yellow fluorescent powder is Ce3+Activated aluminate phosphor, and said Ce3+The activated aluminate phosphor is selected from Y3Al5O12:Ce3+、(Y,Lu)3Al5O12:Ce3+And Y3(Al,Ga)5O12:Ce3+At least one of; or, the yellow fluorescent powder is Ce3+Activated nitride phosphor, and said Ce3+Activated nitride phosphor selected from La3Si6N11:Ce3+、Y3Si6N11:Ce3+、Lu3Si6N11:Ce3+、(La,Lu)3Si6N11:Ce3+And (La, Y)3Si6N11:Ce3+Any one of (1). And the red fluorescent powder is Eu2+Activated nitride phosphor, and said Eu2+The activated nitride phosphor is selected from Sr2Si5N8:Eu2+、CaAlSiN3:Eu2+And (Sr, Ca) AlSiN3:Eu2+At least one of; or, the red fluorescent powder is Eu3+Activated oxide phosphor, and said Eu3+The activated oxide phosphor is selected from (Y, Gd) (W, P) O4:Eu3+(ii) a Or, the red fluorescent powder is Mn4+Activated fluoride phosphor, and said Mn4+Activated fluoride phosphor selected from K2SiF6:Mn4+、K2GeF6:Mn4+And K2(Si,Ge)F6:Mn4+At least one of (1).
In a preferred embodiment, the fluorescent material in the white light LED is composed of yellow phosphor and red phosphor, and the yellow phosphor is La3Si6N11:Ce3+And the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+. Using La3Si6N11:Ce3+Yellow phosphor and (Y, Gd) (W, P) O4:Eu3+The red fluorescent powder is combined and matched, the excitation efficiency of the red fluorescent powder is higher than that of the existing aluminate yellow powder and nitride red powder at 470nm and 480nm, and the scheme of high luminous efficiency of the white LED can be realized.
In the embodiment that the fluorescent material in the white light LED is composed of green fluorescent powder and red fluorescent powder, the green fluorescent powder is Eu2+Activated oxynitride phosphor and Eu2+Any one of activated sulfide phosphors; the red fluorescent powder is Eu2+Activated nitride phosphor, Eu3+Activated oxide phosphor and Mn4+Any one of activated fluoride phosphors; the green fluorescent powder and the red fluorescent powder have better excitation effect at 470-480nm, and the luminous efficiency is higher when the white light LED is packaged.
In one embodiment, the mass ratio of the green phosphor to the red phosphor in the phosphor material is 1: (0.05-0.5). The color temperature of the white light LED can be controlled within the range of 2000K-6500K within the mass ratio range of the green fluorescent powder to the red fluorescent powder.
For the green phosphor and red phosphor described above: the green fluorescent powder is Eu2+Activated nitrogen oxide phosphor, and said Eu2+The activated nitrogen oxide phosphor is selected from beta-Sialon Eu2+(ii) a Or, the green fluorescent powder is Eu2+Activated sulfide phosphor, and said Eu2+The activated sulfide phosphor is selected from SrGa2S4:Eu2+And SrAl2S4:Eu2+At least one of (1). And the red fluorescent powder is Eu2+Activated nitride phosphor, and said Eu2+The activated nitride phosphor is selected from Sr2Si5N8:Eu2+、CaAlSiN3:Eu2+And (Sr, Ca) AlSiN3:Eu2+At least one of; or, the red fluorescent powder is Eu3+Activated oxide phosphor, and said Eu3+The activated oxide phosphor is selected from (Y, Gd) (W, P) O4:Eu3+(ii) a Or, the red fluorescent powder is Mn4+Activated fluoride phosphor, and said Mn4+Activated fluoride phosphor selected from K2SiF6:Mn4+、K2GeF6:Mn4+And K2(Si,Ge)F6:Mn4+At least one of (1).
In a preferred embodiment, the green phosphor is beta-Sialon Eu2+Or SrGa2S4:Eu2+And the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+. Green phosphor is beta-Sialon:Eu2+Or SrGa2S4:Eu2+Has higher excitation efficiency at 470-480nm and red fluorescent powder (Y, Gd) (W, P) O4:Eu3+And the white light LED is packaged with higher luminous efficiency by matching.
On the other hand, the embodiment of the invention also provides a lamp for health lighting, which comprises the white light LED.
Specifically, the white light LED arranged in the lamp for health lighting in the embodiment of the invention comprises a blue light chip and a fluorescent material excited by the blue light chip, wherein the peak wavelength of the blue light chip is 470-480nm, the fluorescent material comprises yellow fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 540-560 nm and red fluorescent powder with the peak wavelength located at 600-660nm, or the fluorescent material comprises green fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 500-540nm and red fluorescent powder with the peak wavelength located at 600-660 nm. In the health lighting lamp, the fluorescent material of the white light LED is selected as described in detail above.
The lamp for health illumination provided by the embodiment of the invention is provided with the specific white light LED, so that the lamp for health illumination has high quantum efficiency, high luminous efficiency and low luminous efficiency blue light hazard, is beneficial to learning and working, can keep an excited state, and has good application in the application fields of education illumination and office illumination.
The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.
Example 1
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. The yellow phosphor is La3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+Peak wavelength ofLocated between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.2. the color rendering index and color temperature are shown in Table 1.
Example 2
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. The yellow fluorescent powder is Y3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.22. the color rendering index and color temperature are shown in Table 1.
Example 3
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. The yellow fluorescent powder is Lu3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; red phosphor is Sr2Si5N8:Eu2+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.25. the color rendering index and color temperature are shown in Table 1.
Example 4
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. Yellow phosphor is (Y, Lu)3Al5O12:Ce3+The peak wavelength is between 545 and 550 nm; the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.34. the color rendering index and color temperature are shown in Table 1.
Example 5
Health-care foodThe white light LED for the illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. The yellow fluorescent powder is Y3Al5O12:Ce3+The peak wavelength is between 545 and 550 nm; the red phosphor is K2SiF6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.34. the color rendering index and color temperature are shown in Table 1.
Example 6
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. Yellow phosphor is (La, Y)3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; the red phosphor is K2GeF6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.35. the color rendering index and color temperature are shown in Table 1.
Example 7
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. The yellow fluorescent powder is Y3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; the red phosphor is K2(Si,Ge)F6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.34. the color rendering index and color temperature are shown in Table 1.
Example 8
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. Yellow fluorescenceThe light powder is La3Si6N11:Ce3+The peak wavelength is between 545 and 550 nm; the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.36. the color rendering index and color temperature are shown in Table 1.
Example 9
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of yellow fluorescent powder and red fluorescent powder. Yellow phosphor is (La, Lu)3Si6N11Ce, peak wavelength between 545 and 550 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+The peak wavelength is between 620 and 630 nm; the mass ratio of the yellow fluorescent powder to the red fluorescent powder is 1: 0.24. the color rendering index and color temperature are shown in Table 1.
Example 10
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is beta-Sialon Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.26. the color rendering index and color temperature are shown in Table 1.
Example 11
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.26. color rendering index and color thereofThe temperatures are shown in table 1.
Example 12
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrAl2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is (Sr, Ca) AlSiN3:Eu2+The peak wavelength is located at 620-630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.23. the color rendering index and color temperature are shown in Table 1.
Example 13
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; red phosphor is Sr2Si5N8:Eu2+The peak wavelength is between 620 and 630 nm; (ii) a The mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.25. the color rendering index and color temperature are shown in Table 1.
Example 14
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.34. the color rendering index and color temperature are shown in Table 1.
Example 15
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is at 475-The fluorescent material is the combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is K2SiF6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.35. the color rendering index and color temperature are shown in Table 1.
Example 16
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is K2GeF6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.37. the color rendering index and color temperature are shown in Table 1.
Example 17
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is SrGa2S4:Eu2+The peak wavelength is between 520 nm and 540 nm; the red phosphor is K2(Si,Ge)F6:Mn4+The peak wavelength is between 620 and 630 nm; the mass ratio of the green fluorescent powder to the red fluorescent powder is 1: 0.38. the color rendering index and color temperature are shown in Table 1.
Example 18
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-480nm, and the fluorescent material is a combination of green fluorescent powder and red fluorescent powder. The green phosphor is beta-Sialon Eu2+The peak wavelength is between 520 nm and 540 nm; the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+The peak wavelength is between 620 and 630 nm; green colourThe mass ratio of the fluorescent powder to the red fluorescent powder is 1: 0.36. the color rendering index and color temperature are shown in Table 1.
Comparative example 1
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Si6N11:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 2
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Si6N11:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 3
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Si6N11:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 4
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Si6N11:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 5
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Si6N11:Ce3+Yellow phosphor, peak wavelength positionAt 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 6
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Al5O12:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 7
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3Al5O12:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
Comparative example 8
A white light LED for health illumination comprises a blue light chip and a fluorescent material excited by the blue light chip. Specifically, the peak wavelength of the chip is 475-3(Al,Ga)5O12:Ce3+The peak wavelength of the yellow fluorescent powder is between 545 and 555 nm. The color rendering index and color temperature are shown in Table 1.
The results of the performance test of the white LEDs in the above examples and comparative examples are shown in table 1.
TABLE 1
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A white light LED comprises a blue light chip and a fluorescent material excited by the blue light chip, and is characterized in that the peak wavelength of the blue light chip is 470-480nm, the fluorescent material comprises yellow fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 540-560 nm and red fluorescent powder with the peak wavelength located at 600-660nm, or the fluorescent material comprises green fluorescent powder with the peak wavelength suitable for 470-480nm excitation and located at 500-540nm and red fluorescent powder with the peak wavelength located at 600-660 nm.
2. The white LED of claim 1 wherein the phosphor is composed of a yellow phosphor having a peak wavelength of 540nm-560nm and a red phosphor having a peak wavelength of 600-660 nm.
3. The white LED of claim 2, wherein the yellow phosphor is Ce3+Activated aluminate phosphor and Ce3+Any one of activated nitride fluorescent powder, wherein the red fluorescent powder is Eu2+Activated nitride phosphor, Eu3+Activated oxide phosphor and Mn4+Any one of activated fluoride phosphors; and/or the presence of a gas in the gas,
the mass ratio of yellow fluorescent powder to red fluorescent powder in the fluorescent material is 1: (0.1-0.5).
4. The white LED of claim 3, wherein the yellow phosphor is Ce3+Activated aluminate phosphor, and said Ce3+The activated aluminate phosphor is selected from Y3Al5O12:Ce3+、(Y,Lu)3Al5O12:Ce3+And Y3(Al,Ga)5O12:Ce3+At least one of; or,
the yellow fluorescent powder is Ce3+Activated nitride phosphor, and said Ce3+Activated nitride phosphor selected from La3Si6N11:Ce3+、Y3Si6N11:Ce3+、Lu3Si6N11:Ce3+、(La,Lu)3Si6N11:Ce3+And (La, Y)3Si6N11:Ce3+Any one of (1); or,
the red fluorescent powder is Eu2+Activated nitride phosphor, and said Eu2+The activated nitride phosphor is selected from Sr2Si5N8:Eu2+、CaAlSiN3:Eu2+And (Sr, Ca) AlSiN3:Eu2+At least one of; or,
the red fluorescent powder is Eu3+Activated oxide phosphor, and said Eu3+The activated oxide phosphor is selected from (Y, Gd) (W, P) O4:Eu3+(ii) a Or,
the red fluorescent powder is Mn4+Activated fluoride phosphor, and said Mn4+Activated fluoride phosphor selected from K2SiF6:Mn4+、K2GeF6:Mn4+And K2(Si,Ge)F6:Mn4+At least one of (1).
5. The white LED of claim 2, wherein the yellow phosphor is La3Si6N11:Ce3+And the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+。
6. The white LED of claim 1, wherein the phosphor comprises a green phosphor having a peak wavelength at 500-540nm and a red phosphor having a peak wavelength at 600-660 nm.
7. The white LED of claim 6, wherein the green phosphor is Eu2+Activated oxynitride phosphor and Eu2+Any one of activated sulfide phosphors, wherein the red phosphor is Eu2+Activated nitride phosphor, Eu3+Activated oxide phosphor and Mn4+Any one of activated fluoride phosphors; and/or the presence of a gas in the gas,
the mass ratio of the green fluorescent powder to the red fluorescent powder in the fluorescent material is 1: (0.05-0.5).
8. The white LED of claim 6, wherein the green phosphor is Eu2+Activated nitrogen oxide phosphor, and said Eu2+The activated nitrogen oxide phosphor is selected from beta-Sialon Eu2+(ii) a Or,
the green fluorescent powder is Eu2+Activated sulfide phosphor, and said Eu2+The activated sulfide phosphor is selected from SrGa2S4:Eu2+And SrAl2S4:Eu2+At least one of; or,
the red fluorescent powder is Eu2+Activated nitride phosphor, and said Eu2+The activated nitride phosphor is selected from Sr2Si5N8:Eu2+、CaAlSiN3:Eu2+And (Sr, Ca) AlSiN3:Eu2+At least one of; or,
the red fluorescent powder is Eu3+Activated oxide phosphor, and said Eu3+The activated oxide phosphor is selected from (Y, Gd) (W, P) O4:Eu3+(ii) a Or,
the red fluorescent powder is Mn4+Activated fluoride phosphor, and said Mn4+Activated fluoride phosphor selected from K2SiF6:Mn4+、K2GeF6:Mn4+And K2(Si,Ge)F6:Mn4+At least one of (1).
9. The white LED of claim 6, wherein the green phosphor is β -Sialon Eu2+Or SrGa2S4:Eu2+And the red fluorescent powder is (Y, Gd) (W, P) O4:Eu3+。
10. A health lighting fixture, characterized in that it comprises a white LED according to any one of claims 1-9.
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| PCT/CN2020/089160 WO2020200327A1 (en) | 2019-08-23 | 2020-05-08 | White light led and lamp for healthy lighting |
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