CN111720758A - Light source module and lamp - Google Patents
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- CN111720758A CN111720758A CN202010564417.6A CN202010564417A CN111720758A CN 111720758 A CN111720758 A CN 111720758A CN 202010564417 A CN202010564417 A CN 202010564417A CN 111720758 A CN111720758 A CN 111720758A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
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- 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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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Abstract
A light source module comprises a purple light generating part and a white light generating part, wherein the peak wavelength of light emitted by the purple light generating part is in a range from 380nm to 420nm, the white light generating part emits first white light, the purple light generating part and the light emitted by the white light generating part are mixed to form second white light, and the ratio of the spectral radiant energy of the light emitted by the purple light generating part in the range from 380nm to 420nm to the total radiant energy of the second white light in a visible light region, namely the range from 380nm to 780nm is 5.0-25.0%. The light source module provided by the invention specially optimizes the spectral distribution and increases the energy of the purple light region aiming at the special requirement of preventing myopia. Work, life, study under the luminous environment that this application light source module and lamps and lanterns provided can alleviate visual fatigue, and then prevent near-sighted emergence and delay near-sighted process.
Description
Technical Field
The invention relates to a light source module and a lamp for illumination.
Background
With the increasing use of electronic products, the population of myopia is increasing worldwide, with high myopia being considered the first cause of blindness. In China, myopia has become a "national disease". The total number of people suffering from myopia in China is nearly 5 hundred million, wherein teenagers account for about 50-60%. Myopia has seriously affected the quality of the population of our country, even the national security. The myopia prevention and control work of Chinese children and teenagers has been raised to the national strategic height.
At present, the active and effective prevention and treatment measures are mainly to increase outdoor time, to carry out treatment with glasses, and to carry out intervention of atropine and other drugs. Research shows that the myopia can be effectively prevented from occurring and developing when the user receives illumination for at least 2 hours outdoors every day. However, the reason for this is not revealed, but at least we can see a strong correlation of illumination with myopia. This gives us a hint whether it is possible to achieve illumination while avoiding the generation of myopia by providing a special illumination source. However, no professional spectrum design is available for the white light LED on the market at present aiming at relieving asthenopia, preventing myopia and delaying myopia development.
Disclosure of Invention
The invention aims to solve the problems and find a light source and a lamp which can relieve visual fatigue, prevent myopia and delay the development of myopia.
In order to achieve the above functions, the present invention provides a light source module, which includes a violet light generating portion and a white light generating portion, wherein the violet light generating portion emits violet light, the peak wavelength of the violet light is in a range from 380nm to 420nm, the white light generating portion emits first white light, the violet light generating portion and the white light generating portion emit light which are mixed to form second white light, and the ratio of the spectral radiation energy of the violet light in the range from 380nm to 420nm in the visible light range of the second white light, that is, the total radiation energy of the second white light in the range from 380nm to 780nm is 5.0-25.0%.
Preferably, the peak wavelength of the light emitted from the violet light generating part is in the range of 390nm or more to 410nm or less.
Preferably, the second white light has a color temperature of 2500K-6500K and duv = -0.010.
Preferably, the white light generating part includes:
a blue light generating section that emits light having a peak wavelength in a range of 430nm or more and 470nm or less;
a cyan light generating section for emitting light having a peak wavelength in a range of 470nm or more and 510nm or less;
the red light generating part emits light with a peak wavelength in a range from 610nm or more to 650nm or less.
Preferably, the blue light generating part is a blue light LED, the cyan light generating part is a cyan light LED or a phosphor powder which emits cyan light after being excited by the blue light LED, and the red light LED is a red light LED or a phosphor powder which emits red light after being excited by the blue light LED.
Preferably, the white light generating part further comprises a yellow-green light generating part which emits light with a peak wavelength in a range of 510nm or more and 610nm or less, and the yellow-green light generating part is phosphor which emits yellow-green light after being excited by the blue LED.
Preferably, the color temperature of the second white light is 4000K-6500K, the ratio of the spectral radiation energy of the second white light in the range from more than 420nm to 470nm or less to the total radiation energy of the second white light in the visible region is 5.0-25.0%, and the ratio of the spectral radiation energy in the range from more than 470nm to 510nm to the total radiation energy of the whole light source module in the visible region is 10.0-30.0%.
Preferably, the ratio of the spectral radiant energy of the second white light in the range from more than 420nm to 470nm or less in the total radiant energy of the whole light source module in the visible region is 5.0-20.0%, and the ratio of the spectral radiant energy in the range from more than 470nm to 510nm in the total radiant energy of the second white light in the visible region is 10.0-20.0%.
Preferably, the peak intensity of the light emitted from the violet light generator is 40.0 to 100.0% of the maximum spectral intensity of the second white light in the visible light region, the peak intensity of the light emitted from the blue light generator is 40.0 to 200.0% of the peak intensity of the light emitted from the violet light generator, the peak intensity of the light emitted from the cyan light generator is 30.0 to 140.0% of the peak intensity of the light emitted from the violet light generator, and the peak intensity of the light emitted from the red light generator is 20.0 to 120.0% of the peak intensity of the light emitted from the violet light generator.
Preferably, the color temperature of the second white light is 2500K-4000K, the ratio of the spectral radiation energy of the second white light in the range of more than 420nm to less than or equal to 470nm to the total radiation energy of the second white light in the visible region is 0-10.0%, and the ratio of the spectral radiation energy in the range of more than 470 to less than or equal to 510nm to the total radiation energy of the second white light in the visible region is 3.0-20.0%.
Preferably, the ratio of the spectral radiant energy in the range of more than 470nm to not more than 510nm to the total radiant energy of the second white light in the visible region is 4.0-15.0%.
Preferably, the peak intensity of the light emitted from the violet light generating part is the maximum spectral intensity of the second white light in the visible light region, the peak intensity of the light emitted from the blue light generating part is 2.0 to 60.0% of the peak intensity of the light emitted from the violet light generating part, the peak intensity of the light emitted from the cyan light generating part is 10.0 to 80.0% of the peak intensity of the light emitted from the violet light generating part, and the peak intensity of the light emitted from the red light generating part is 35.0 to 80.0% of the peak intensity of the light emitted from the violet light generating part.
Preferably, the violet light generating part is a violet LED.
The invention also provides a lamp which is characterized by comprising a lamp body, a purple light source and a white light source, wherein the peak wavelength of light emitted by the purple light source is in a range from 380nm to 420nm, the white light source emits first white light, light emitted by the purple light source and light emitted by the white light source are mixed in the lamp body to form second white light, and spectral radiation energy of the light emitted by the purple light source in a range from 380nm to 420nm accounts for 5.0-25.0% of total radiation energy of the second white light in a visible light region, namely a range from 380nm to 780 nm.
Preferably, the violet light source emits light with a peak wavelength in a range of 390nm or more to 410nm or less.
Preferably, the second white light has a color temperature of 2500K-6500K and duv = -0.010.
The luminaire of claim 14, wherein the white light source comprises:
a blue light generating section that emits light having a peak wavelength in a range of 430nm or more and 470nm or less;
a cyan light generating section for emitting light having a peak wavelength in a range of 470nm or more and 510nm or less;
the red light generating part emits light with a peak wavelength in a range from 610nm or more to 650nm or less.
Preferably, the blue light generating part is a blue light LED, the cyan light generating part is a cyan light LED or a phosphor powder which emits cyan light after being excited by the blue light LED, and the red light LED is a red light LED or a phosphor powder which emits red light after being excited by the blue light LED.
Preferably, the white light source further comprises a yellow-green light generating part which emits light with a peak wavelength in a range of 510nm or more and 610nm or less, and the yellow-green light generating part is a phosphor which emits yellow-green light after being excited by the blue LED.
Preferably, the purple light source is a purple light LED, and the white light source is a white light LED.
The light source module provided by the invention specially optimizes the spectral distribution and increases the energy of the purple light region aiming at the special requirement of preventing myopia. Work, life, study under the luminous environment that this application light source module and lamps and lanterns provided can alleviate visual fatigue, and then prevent near-sighted emergence and delay near-sighted process.
Drawings
FIG. 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;
FIG. 2 is a graph of the emission spectrum of preferred embodiment 1 of the present invention;
FIG. 3 is a graph of the emission spectrum of the preferred embodiment 2 of the present invention;
FIG. 4 is a graph of the emission spectrum of the preferred embodiment 3 of the present invention;
FIG. 5 is a graph of the emission spectrum of the preferred embodiment 4 of the present invention;
FIG. 6 is a graph of the emission spectrum of the preferred embodiment 5 of the present invention;
FIG. 7 is a graph of the emission spectrum of the preferred embodiment 6 of the present invention;
FIG. 8 is a graph of the emission spectrum of the preferred embodiment 7 of the present invention;
FIG. 9 is a graph of the emission spectrum of the preferred embodiment 8 of the present invention;
fig. 10 is a schematic structural diagram of a lamp according to a preferred embodiment of the invention.
Detailed Description
Recently, we have new insights into the relationship between light and myopia based on the combing of existing literature and research reports. Research shows that energy in the purple light wave band can activate the retina EGR1 gene, and the EGR1 gene is the molecular basis of the connection between purple light and myopia. In some animal experiments based on the above, the energy of the purple light wave band is proved to have important effects on preventing myopia and delaying the development of myopia. A study conducted by the medical college of japan university of qingying, 2017, which conducted a tracking experiment for 300 myopic children up to one year, were divided into two groups, wearing filter violet glasses and transmission violet glasses, respectively. The result shows that the change of the eye axis of the children wearing the purple light transmitting glasses is smaller than that of the children wearing the purple light filtering glasses, and the effect of certain dosage of purple light on myopia retardation is shown.
In combination with the above research results, the present application provides a light source module and a lamp that enable the emergent light to have specific energy distribution in the violet region, and the following describes in further detail a light source module and a lamp provided by the present application in combination with the accompanying drawings and some preferred embodiments according to the present application.
The light source module of the preferred embodiment of the present invention is a mixed white LED package chip, which may be an LED chip with a general chip package structure or a COB package structure. As shown in fig. 1, the light source module includes a purple light generating portion 1 and a white light generating portion 2, where a base portion 4 is disposed on the base portion, and an encapsulant layer 3 covers the purple light generating portion 1 and the white light generating portion 2. The violet light generating part 1 emits violet light having a peak wavelength in a range of 380nm or more to 420nm or less, preferably having a peak wavelength in a range of 390nm or more to 410nm or less, and in several embodiments of the following embodiments, two types of violet LED chips having peak wavelengths of 400nm and 405nm are mainly used. The LED Chip (LED Chip) comprises a positive mounting or a reverse mounting, and a single LED Chip or a plurality of LED chips are connected together in series, parallel or series-parallel. The white light generating part 2 emits white light of a first color, hereinafter referred to as first white light. The purple light emitted by the purple light generating part 1 and the first white light emitted by the white light generating part 2 are mixed to form second white light of a second color. Although both the first white light and the second white light are white light, the first white light and the second white light are slightly deviated in color due to the addition of violet light, but both of them belong to the category of white light.
The purple light emitted by the purple light generating part 1 is mainly concentrated in a wave band from 380nm to 420nm, and we know that the purple light has a certain effect on preventing myopia, but in order to take account of the requirement of illumination, the energy of the wave band cannot be enhanced at once, and through repeated experiments, the spectral radiation energy of the purple light emitted by the purple light generating part 1 in the range from 380nm to 420nm accounts for 5.0-25.0% of the total radiation energy of the second white light formed after mixing in the visible light region, namely, the range from 380nm to 780 nm. Certainly, the purple light emitted by the purple light generating part 1 also exceeds the range of 380nm to 420nm, but as the main energy is concentrated in the waveband, the influence of the exceeding part on the whole spectrum is small, and no specific limitation is made here, so long as the energy within the range from 380nm to 780nm can be ensured to play a certain role in preventing myopia, and simultaneously, the light color of the second white light can be ensured to meet the white light standard, and the indexes such as the light color and the color rendering property are not influenced too much. In the embodiment, the color temperature of the second white light is within the range of 2500K to 6500K, and the distance Duv (BBL) between the correlated color temperature and the blackbody locus on the CIE1931 chromaticity diagram is not more than 0.010, namely duv = -0.010 to 0.010.
Two methods are generally adopted for generating white light in the prior art, the first method is to utilize a blue light technology to be matched with fluorescent powder to form white light; the second is a multi-monochromatic light mixing method. Therefore, the white light generating part 2 in this embodiment also includes several light emitting parts generating different light colors, and the light emitted from each light emitting part is mixed to generate the first white light. As shown in fig. 1, the white light generating portion 2 includes a blue light generating portion 21, a cyan light generating portion 22, and a red light generating portion 23. The blue light generating section 21 emits light having a peak wavelength in a range of 430nm or more and 470nm or less, the cyan light generating section 22 emits light having a peak wavelength in a range of 470nm or more and 510nm or less, and the red light generating section 23 emits light having a peak wavelength in a range of 610nm or more and 650nm or less. In the present embodiment, the blue light generator 21, the cyan light generator 22, and the red light generator 23 are a blue LED, a cyan LED, and a red LED, respectively. In other preferred embodiments, the cyan light generating portion 22 can also be a phosphor that is excited by other light emitting devices, such as a blue LED, to convert light into light with a peak wavelength in a range from 470nm or more to 510nm or less. The red light generating portion 23 may be a phosphor that is excited by another light emitting element, such as a blue LED, and converts light into light having a peak wavelength in a range of 610nm or more and 650nm or less. Of course, when the cyan light generating portion 22 and the red light generating portion 23 are made of phosphor, they may be one phosphor or a mixture of plural phosphors having different components. In the present embodiment, the white light generating part 2 further includes a yellow-green light generating part, and the yellow-green light generating part is a phosphor that emits yellow-green light having a peak wavelength in a range of 510nm or more and 610nm or less after being excited by the blue LED. The yellow-green light generating part can adopt one yellow light fluorescent powder or green light fluorescent powder, and can also be formed by mixing two or more than two different yellow light and green light fluorescent powders. The phosphor powder is uniformly distributed in the packaging adhesive layer 3, and after being excited by the blue light generating part 21, the phosphor powder generates yellow-green light and light emitted by the blue light generating part 21, the blue light generating part 22 and the red light generating part 23 are mixed to form white light.
As human eyes, particularly teenagers, are most sensitive to energy in the 415-465 nm blue light band, retinal epithelial cells of the human eyes can die due to long-time high blue light energy light irradiation, visual health is damaged, and the human eyes are prevented from being exposed to the high blue light irradiation for a long time (particularly at night). The blue light is added in the embodiment, so that the energy ratio of the blue light wave band is reduced, the effect of relieving visual fatigue is achieved, and the effect of preventing myopia of the light source module can be enhanced. The yellow-green light and the red light mainly have the functions of balancing the whole light and adjusting the color rendering index, so that the lighting device emits white light, and the color rendering index is ensured to be more than 85.0. In an application scene with low requirement on the display performance, the yellow-green light generating part is not required to be added.
Because each light emitting part can have multiple choices, in the following two tables, table 1 shows the specific selection type of the light emitting part in 8 preferred embodiments of the light source module of the present application, and table 2 shows the light emitting characteristics of the light emitted by the light source module of each embodiment, where x and y represent coordinate values of the light color of the light emitted by the light source module on x and y axes on the CIE1931 color coordinate system, CCT is color temperature, duv represents the distance and direction of the color shift planckian locus in the color coordinate system, and CRI is color rendering index.
TABLE 1
TABLE 2
In example 1, the violet light generating part 1 was a violet LED chip with Peak =405nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, the cyan light generating part 22 was a cyan LED chip with Peak =496nm, and the yellow-green light generating part was green phosphor Lu3Al5O12:Ce3+And yellow-green phosphor Y3Al5O12:Ce3+Mixed, the red light-emitting part 23 is red phosphor Sr2Si5N8:Eu2+. The emission spectrum of example 1 is shown in fig. 2.
In example 2, the violet light generating part 1 was a violet LED core of Peak =405nmA blue light emitting part 21 of a blue LED chip having Peak =450nm, and a cyan light emitting part 22 of a cyan phosphor BaSi2N2O2:Eu2+The yellow-green light generating part is green phosphor Lu3Al5O12:Ce3+And yellow-green phosphor Y3Al5O12:Ce3+Mixed red light emitting part 23 is red phosphor (Sr, Ca) AlSiN3:Eu2+. The emission spectrum of example 2 is shown in fig. 3.
In example 3, the violet light generating part 1 was a violet LED chip with Peak =405nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, and the cyan light emitting part 22 was cyan phosphor BaSi2N2O2:Eu2+The yellow-green light generating part is green phosphor Y3(Al,Ga)5O12:Ce3+And yellow-green phosphor Y3Al5O12:Ce3+Mixed red light emitting part 23 is red phosphor (Sr, Ca) AlSiN3:Eu2+. The emission spectrum of example 3 is shown in fig. 4.
In example 4, the violet light generating part 1 was a violet LED chip with Peak =405nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, and the cyan light emitting part 22 was cyan phosphor BaSi2N2O2:Eu2+The yellow-green light generating part is green phosphor (Sr, Ba)3Si5O5:Eu2+The red light emitting part 23 is red phosphor Sr2Si5N8:Eu2+. The emission spectrum of example 4 is shown in fig. 5.
In example 5, the violet light generating part 1 was a violet LED chip with Peak =405nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, and the cyan light emitting part 22 was cyan phosphor BaSi2N2O2:Eu2+The yellow-green light generating part is green phosphor (Sr, Ba)3Si5O5:Eu2+The red light emitting part 23 is red phosphor (Sr, Ca) AlSiN3:Eu2+. The emission spectrum of example 5 is shown in fig. 6.
In example 6, violet light generationPart 1 is a violet LED chip with Peak =405nm, blue light generating part 21 is a blue LED chip with Peak =450nm, and cyan light emitting part 22 is cyan phosphor powder BaSi2N2O2:Eu2+The yellow-green light generating part is yellow-green fluorescent powder Y3Al5O12:Ce3+The red light emitting part 23 is red phosphor Sr2Si5N8:Eu2+. The emission spectrum of example 6 is shown in fig. 7.
In example 7, the violet light generating part 1 was a violet LED chip with Peak =400nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, the cyan light generating part 22 was a cyan LED chip with Peak =496nm, and the yellow-green light generating part was yellow-green phosphor Y3Al5O12:Ce3+The red light emitting part 23 is red phosphor (Sr, Ca) AlSiN3:Eu2+. The emission spectrum of example 7 is shown in fig. 8.
In example 8, the violet light generating part 1 was a violet LED chip with Peak =405nm, the blue light generating part 21 was a blue LED chip with Peak =450nm, and the cyan light emitting part 22 was cyan phosphor BaSi2N2O2:Eu2+The yellow-green light generating part is yellow-green fluorescent powder Y3Al5O12:Ce3+The red light emitting part 23 is red phosphor (Sr, Ca) AlSiN3:Eu2+. The emission spectrum of example 8 is shown in fig. 9.
The current research has confirmed that the illumination will affect the circadian rhythm, so that the use of 4000-6500K color temperature during the daytime and 2500-4000K color temperature at night are generally recommended. As can be seen from Table 2, the color temperature of the examples 1-4 is in the range of 4000-6500K and suitable for daytime use, while the color temperature of the examples 5-8 is in the range of 2500K-4000K and suitable for nighttime use. For light source products with different color temperatures, the influence on the spectrum after the purple light with the same proportion is added is slightly different, so the energy ratio in each wave band needs to be adjusted. Table 3 shows the peak wavelength positions of the individual peaks in the spectra of the light source modules of examples 1 to 8, and the intensity relationship between the individual peaks, and Table 4 shows the energy ratios of the individual regions in the spectra. Wherein the purple light region is a section with the wavelength of more than or equal to 380nm to less than or equal to 420nm, the blue light region is a section with the wavelength of more than 420nm to less than or equal to 470nm, the cyan light region is a section with the wavelength of more than 470nm to less than or equal to 510nm, and the red light region is a section with the wavelength of more than or equal to 610nm to less than or equal to 650 nm. The ratio, which is expressed as a percentage in table 4, refers to the ratio between the energy in the segment and the total radiant energy of the second white light in the visible region, i.e., in the range of 380nm or more to 780nm or less.
TABLE 3
TABLE 4
As can be seen from the above two tables, when the color temperature of the second white light is 4000K to 6500K, the second white light in examples 1 to 4 has a spectral radiant energy in the blue light band, i.e., in the range of more than 420nm to 470nm or less, in a ratio of 5.0 to 25.0%, preferably 5.0 to 20.0%, in the total radiant energy of the second white light in the visible light region. The ratio of the spectral radiant energy in the blue light band, i.e. the range from more than 470nm to not more than 510nm, to the total radiant energy of the whole light source module in the visible light region is 10.0-30.0%, preferably 10.0-20.0%. Examples 1-4 the maximum spectral intensity in the spectrum is typically one of the violet or blue peaks due to the higher color temperature and the higher energy content of the blue and violet regions. The peak intensity of the light emitted by the purple light generating part 1 is 40.0-100.0% of the maximum spectral intensity of the second white light emitted by the light source module in the visible light region, the peak intensity of the light emitted by the blue light generating part 21 is 40.0-200.0% of the peak intensity of the light emitted by the purple light generating part 1, the peak intensity of the light emitted by the cyan light generating part 22 is 30.0-140.0% of the peak intensity of the light emitted by the purple light generating part 1, and the peak intensity of the light emitted by the red light generating part 23 is 20.0-120.0% of the peak intensity of the light emitted by the purple light generating part 1.
In examples 5-8, the color temperature is in the range of 2500K to 4000K, since these four examples are designed for evening and night lighting. These embodiments reduce the energy in the blue region and supplement the reduction of the energy in the blue region with cyan light, while increasing the energy in the red region, because the red band can supplement the blue light well in the afternoon and at night, meet the requirement of concentration, and do not cause additional visual burden. In the embodiments, the spectral radiant energy of the second white light in the blue light wave band, namely the range from more than 420nm to less than or equal to 470nm, accounts for 0-10.0% of the total radiant energy of the second white light in the visible light region. The ratio of the spectral radiant energy in the blue light band, i.e. the range from more than 470nm to not more than 510nm, to the total radiant energy of the whole light source module in the visible light region is 2.0-20.0%, preferably 4.0-15.0%. In these embodiments, the energy in the blue region is reduced, and in order to maintain the myopia prevention effect of the present application, the energy in the violet region is still maintained at a certain ratio, so that the maximum spectral intensity in the spectrum is the violet peak. The peak intensity of the light emitted by the purple light generating part 1 is the maximum spectral intensity of the second white light emitted by the light source module in the visible light region, the peak intensity of the light emitted by the blue light generating part 21 is 2.0-60.0% of the peak intensity of the light emitted by the purple light generating part 1, the peak intensity of the light emitted by the cyan light generating part 22 is 10.0-80.0% of the peak intensity of the light emitted by the purple light generating part 1, and the peak intensity of the light emitted by the red light generating part 23 is 35.0-80.0% of the peak intensity of the light emitted by the purple light generating part 1.
The above embodiments are all customized light source modules according to the features of the present application, and for a lamp using a conventional white light chip, it is also desirable to achieve the effect of preventing myopia as proposed by the present application, so that the present application further provides another embodiment of the lamp. The lamp is a desk lamp, as shown in fig. 10, and includes a lamp body composed of a lamp holder 61, a lamp post 62, and a base 63, and two light sources, namely a purple light source and a white light source, are disposed in the lamp holder. The violet light source is a violet LED, and the peak wavelength of the emitted light is in the range of 380nm to 420nm, preferably 390nm to 410 nm. The white light source is a white light LED and emits first white light. The light emitted by the violet light source and the white light source is mixed in the lamp base 61 to form a second white light. The spectral radiation energy of the light emitted by the purple light source in the range from 380nm to 420nm accounts for 5.0-25.0% of the total radiation energy of the second white light in the visible light region, namely, in the range from 380nm to 780 nm. Any general product on the current market can be selected for the white light source, and the vision protection effect expected by the application can be achieved as long as the proportion of purple light in the whole light emitting process can be ensured. Therefore, in other preferred embodiments, the violet light source can be added to various existing lamps such as ceiling lamps, wall lamps, spot lamps and down lamps, so that the purpose of the invention is achieved. Of course, the direct addition of the violet light source to the existing lamp has a slight influence on the light color, and the light emitting effect of the violet light source is slightly inferior to that of the light source module provided by the application, but the improvement of the existing product can be conveniently realized. Certainly, in order to meet the requirement of illumination, the color temperature of the second white light in the embodiment can still be kept within 2500K to 6500K, and duv = -0.010 to 0.010.
Fig. 10 shows a table lamp as a preferred embodiment of the present application, and in order to achieve better eyesight protection effect, we adopt a white light LED with reduced blue light and added cyan light, which is concentrated in light color, as a white light source. The white light source includes: a blue light generating section that emits light having a peak wavelength in a range of 430nm or more and 470nm or less; a cyan light generating section for emitting light having a peak wavelength in a range of 470nm or more and 510nm or less; a red light generating section for emitting light having a peak wavelength in a range of 610nm or more to 650nm or less; and a yellow-green light generating section for emitting light having a peak wavelength in a range of 510 to 610 nm. The blue light generating part is a blue light LED, the cyan light generating part is a cyan light LED or fluorescent powder which emits cyan light after being excited by the blue light LED, the red light LED is a red light LED or fluorescent powder which emits red light after being excited by the blue light LED, and the yellow-green light generating part is fluorescent powder which emits yellow-green light after being excited by the blue light LED. In other preferred embodiments, the violet light source and other white light sources may be used, or a white light source formed by mixing RGB LEDs may be used, which is not limited in the present application.
The foregoing description of the preferred embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the application to the precise forms disclosed, and it will be apparent that numerous modifications and variations, which may be apparent to those skilled in the art, are possible and are included within the scope of the invention as defined by the appended claims.
Claims (20)
1. A light source module is characterized by comprising a purple light generating part and a white light generating part, wherein the purple light generating part emits purple light, the peak wavelength of the light is in the range of 380nm to 420nm, the white light generating part emits first white light, the purple light generating part and the light emitted by the white light generating part are mixed to form second white light, and the ratio of the spectral radiation energy of the light emitted by the purple light generating part in the range of 380nm to 420nm to the total radiation energy of the second white light in the visible light region, namely the range of 380nm to 780nm is 5.0-25.0%.
2. The light source module as claimed in claim 1, wherein the peak wavelength of the light emitted from the violet light generating part is in a range of 390nm or more and 410nm or less.
3. The light source module as claimed in claim 1, wherein the second white light has a color temperature of 2500K-6500K, duv = -0.010.
4. The light source module as claimed in claim 1, wherein the white light generating part comprises:
a blue light generating section that emits light having a peak wavelength in a range of 430nm or more and 470nm or less;
a cyan light generating section for emitting light having a peak wavelength in a range of 470nm or more and 510nm or less;
the red light generating part emits light with a peak wavelength in a range from 610nm or more to 650nm or less.
5. The light source module as claimed in claim 4, wherein the blue light generating part is a blue LED, the cyan light generating part is a cyan LED or a phosphor powder which emits cyan light after being excited by the blue LED, and the red LED is a red LED or a phosphor powder which emits red light after being excited by the blue LED.
6. The light source module of claim 4, wherein the white light generator further comprises a yellow-green light generator emitting light with a peak wavelength in a range from 510nm to 610nm, and the yellow-green light generator is a phosphor emitting yellow-green light after being excited by the blue LED.
7. The light source module according to claim 4, wherein the second white light has a color temperature of 4000K to 6500K, a ratio of spectral radiant energy in a range of more than 420nm and 470nm to a total radiant energy in a visible light range of the second white light is 5.0 to 25.0%, and a ratio of spectral radiant energy in a range of more than 470nm and 510nm to a total radiant energy in a visible light range of the entire light source module is 10.0 to 30.0%.
8. The light source module according to claim 7, wherein a ratio of spectral radiant energy of the second white light in a range of more than 420nm and 470nm is 5.0 to 20.0% in total radiant energy of the entire light source module in a visible region, and a ratio of spectral radiant energy in a range of more than 470nm and 510nm is 10.0 to 20.0% in total radiant energy of the second white light in the visible region.
9. The light source module according to claim 7, wherein the peak intensity of the light emitted from the violet light generator is 40.0 to 100.0% of the maximum spectral intensity of the second white light in the visible light region, the peak intensity of the light emitted from the blue light generator is 40.0 to 200.0% of the peak intensity of the light emitted from the violet light generator, the peak intensity of the light emitted from the cyan light generator is 30.0 to 140.0% of the peak intensity of the light emitted from the violet light generator, and the peak intensity of the light emitted from the red light generator is 20.0 to 120.0% of the peak intensity of the light emitted from the violet light generator.
10. The light source module of claim 4, wherein the second white light has a color temperature of 2500K-4000K, a percentage of spectral radiant energy of the second white light in a range of more than 420nm and 470nm is 0-10.0% of a total radiant energy of the second white light in a visible light range, and a percentage of spectral radiant energy of the second white light in a range of more than 470 and 510nm is 3.0-20.0% of the total radiant energy of the second white light in the visible light range.
11. The light source module according to claim 10, wherein a ratio of spectral radiant energy in a range of more than 470nm to not more than 510nm to a total radiant energy of the second white light in a visible region is 4.0 to 15.0%.
12. The light source module according to claim 10, wherein the peak intensity of the light emitted from the violet light generator is the maximum spectral intensity of the second white light in the visible light region, the peak intensity of the light emitted from the blue light generator is 2.0 to 60.0% of the peak intensity of the light emitted from the violet light generator, the peak intensity of the light emitted from the cyan light generator is 10.0 to 80.0% of the peak intensity of the light emitted from the violet light generator, and the peak intensity of the light emitted from the red light generator is 35.0 to 80.0% of the peak intensity of the light emitted from the violet light generator.
13. The light source module as claimed in any one of claims 1 to 12, wherein the violet light generating part is a violet LED.
14. The lamp is characterized by comprising a lamp body, a purple light source and a white light source, wherein the peak wavelength of light emitted by the purple light source is in a range from 380nm to 420nm, the white light source emits first white light, light emitted by the purple light source and light emitted by the white light source are mixed in the lamp body to form second white light, and spectral radiation energy of light emitted by the purple light source in a range from 380nm to 420nm accounts for 5.0-25.0% of total radiation energy of the second white light in a visible light region, namely a range from 380nm to 780 nm.
15. A lamp as recited in claim 14, wherein the violet light source emits light having a peak wavelength in a range from about 390nm to about 410 nm.
16. The lamp of claim 14, wherein the second white light color temperature is 2500K-6500K, duv = -0.010.
17. The luminaire of claim 14, wherein the white light source comprises:
a blue light generating section that emits light having a peak wavelength in a range of 430nm or more and 470nm or less;
a cyan light generating section for emitting light having a peak wavelength in a range of 470nm or more and 510nm or less;
the red light generating part emits light with a peak wavelength in a range from 610nm or more to 650nm or less.
18. The lamp according to claim 17, wherein the blue light generating part is a blue LED, the cyan light generating part is a cyan LED or a phosphor that emits cyan light after being excited by the blue LED, and the red LED is a red LED or a phosphor that emits red light after being excited by the blue LED.
19. The lamp of claim 17, wherein the white light source further comprises a yellow-green light generator that emits light having a peak wavelength in a range from 510nm or more to 610nm or less, and the yellow-green light generator is a phosphor that emits yellow-green light when excited by the blue LED.
20. A light fixture as recited in any one of claims 14-19, wherein said violet light source is a violet LED and said white light source is a white LED.
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| CN114543004A (en) * | 2022-03-14 | 2022-05-27 | 厦门普为光电科技有限公司 | Light-emitting diode lamp with high color rendering property and method for improving color rendering property of lamp |
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