CN113958925A - Method for regulating and controlling illumination spectrum of LED lamp and LED lamp - Google Patents
Method for regulating and controlling illumination spectrum of LED lamp and LED lamp Download PDFInfo
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- 238000005286 illumination Methods 0.000 title claims abstract description 107
- 238000001228 spectrum Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001276 controlling effect Effects 0.000 title claims abstract description 17
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- 239000002096 quantum dot Substances 0.000 claims abstract description 170
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- 238000009792 diffusion process Methods 0.000 claims abstract description 83
- 230000005284 excitation Effects 0.000 claims abstract description 17
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- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
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Abstract
The invention discloses a method for regulating and controlling an illumination spectrum of an LED lamp and the LED lamp. The method for regulating and controlling the lighting spectrum of the LED lamp comprises the following steps: the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate of the LED lamp, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of an LED light source, so that illumination light with a required color is realized. According to the method, the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate to obtain the illumination light with the required color, so that the heat dissipation of the LED lamp beads is not influenced, the stability and the service life of the quantum dots and/or the fluorescent powder can be improved, and the waveband distribution of the illumination spectrum of the LED lamp can be improved.
Description
Technical Field
The invention belongs to the field of display, and particularly relates to a method for regulating and controlling an illumination spectrum of an LED lamp and the LED lamp.
Background
The existing LED white light illumination is basically that a blue LED is packaged by glue mixed with yellow fluorescent powder, partial blue light is converted into yellow light, and the blue light and the yellow light are mixed to obtain white light.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a method for regulating and controlling the illumination spectrum of an LED lamp and the LED lamp. According to the method for regulating and controlling the lighting spectrum of the LED lamp, the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate to obtain the lighting light with the required color, so that the heat dissipation of the LED lamp beads is not influenced, the stability and the service life of the quantum dots and/or the fluorescent powder can be improved, and the waveband distribution of the lighting spectrum of the LED lamp can be improved.
The present application is primarily based on the following problems:
the spectrum of the white light of the illumination LED has spectral distribution in the whole visible light range, only a part of bands (see fig. 2), many spectral bands are missing, and the white light of the LED has a large proportion of blue light components and a low color rendering index. In order to improve the spectral distribution of white light of an LED, reduce the proportion of blue light and increase the color rendering index, the following schemes are generally used: 1) adding yellow fluorescent powder and red fluorescent powder in the packaging glue, wherein the blue LED, the yellow fluorescent powder and the red fluorescent powder obtain white light, and the wave band distribution of a white light spectrum can refer to the graph shown in FIG. 3; 2) mixing green phosphor and red phosphor in the packaging glue, and obtaining white light by the blue LED + the green phosphor + the red phosphor, wherein the wave band distribution of the white light spectrum can refer to the graph shown in FIG. 4; 3) the blue phosphor, the green phosphor and the red phosphor are mixed in the packaging glue by using the purple light LED, and white light is obtained by using the purple light LED, the blue phosphor, the green phosphor and the red phosphor, and the band distribution of the white light spectrum can be referred to as shown in fig. 5. Although the above scheme can improve the distribution of the LED white light spectrum to some extent, the following technical problems still exist: 1. the cost is high; 2. the LED lamp bead has small packaging volume and is not beneficial to heat dissipation for illumination with high power; 3. the fluorescent powder is required to have high heat resistance and light resistance stability, and is not suitable for application of quantum dots.
To this end, according to a first aspect of the invention, the invention proposes a method of regulating the illumination spectrum of an LED luminaire. According to an embodiment of the invention, the method comprises: the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate of the LED lamp, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of an LED light source, so that illumination light with a required color is realized.
According to the method for regulating and controlling the lighting spectrum of the LED lamp, the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate, so that the quantum dots and/or the fluorescent powder are far away from the LED chip, the temperature and the light intensity of the quantum dots and/or the fluorescent powder are low, and the stability and the service life of the quantum dots or the fluorescent powder are favorably improved; in addition, the diffusion plate is large in size, so that the proportion and concentration of quantum dots and/or fluorescent powder in various wave bands can be matched flexibly, the heat dissipation problem of the lamp during lighting cannot be influenced, spectral design can be carried out in a visible light wavelength range according to actual needs to obtain lighting light with required colors, the stability of lighting spectrums can be improved remarkably, and the service life of the LED lamp can be prolonged.
In addition, the method for regulating and controlling the illumination spectrum of the LED lamp according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the desired color and intensity ratio of the illumination light can be obtained by adjusting the mixing ratio and the doping amount of the quantum dots and/or the phosphors corresponding to different wavelength bands in the diffusion plate.
In some embodiments of the present invention, illumination light of different colors is obtained by replacing a diffuser plate containing different quantum dots and/or phosphor compositions.
In some embodiments of the invention, the LED light source is a blue LED or a violet LED.
In some embodiments of the present invention, the illumination spectrum is a white light spectrum, and at least a part of the quantum dots and/or the phosphor is the quantum dots and/or the phosphor lacking in wavelength band when the LED light source obtains white light.
In some embodiments of the present invention, the illumination spectrum is a white light spectrum, and the quantum dots and/or the phosphor comprise quantum dots and/or phosphors with missing wavelength bands and non-missing wavelength bands when white light is obtained by the LED light source.
In some embodiments of the invention, the illumination spectrum is a monochromatic plant-complementary illumination spectrum or a full-spectrum plant-complementary illumination spectrum.
In some embodiments of the invention, the LED light source is a blue LED, and the quantum dots and/or the phosphor comprise red quantum dots and/or red phosphor.
In some embodiments of the present invention, the total doping amount of the quantum dots and/or the phosphor in the diffusion plate is 0.01 to 1 wt%.
According to a second aspect of the invention, the invention provides an LED lamp. According to an embodiment of the invention, the LED lamp comprises: the LED light source comprises a diffusion plate, wherein quantum dots and/or fluorescent powder are dispersed in the diffusion plate, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of the LED light source to realize illumination light of a required color. Compared with the prior art, the quantum dots and/or the fluorescent powder in the LED lamp are far away from the LED chip, the temperature and the light intensity are low, the stability of the quantum dots and/or the fluorescent powder is better, the service life is longer, the stability of an illumination spectrum can be obviously improved on the basis of obtaining illumination light with expected color, and the service life of the LED lamp can be prolonged.
In some embodiments of the present invention, quantum dots and/or phosphors corresponding to different wavelength bands are dispersed in the diffusion plate.
In some embodiments of the present invention, the LED lamp is matched with a plurality of the diffusion plates, and the composition of the quantum dots and/or the phosphor dispersed in the plurality of the diffusion plates is different.
In some embodiments of the present invention, the quantum dots and/or the phosphor are uniformly distributed in the diffusion plate.
In some embodiments of the present invention, the quantum dots and/or the phosphor are distributed in the diffuser plate at a side and/or an intermediate position away from the LED light source.
In some embodiments of the invention, the LED light source is a blue LED or a violet LED.
In some embodiments of the present invention, the total doping amount of the quantum dots and/or the phosphor in the diffusion plate is 0.01 to 1 wt%.
In some embodiments of the present invention, the illumination spectrum of the LED lamp is a white light spectrum, and at least a part of the quantum dots and/or the phosphor is the quantum dots and/or the phosphor which are missing wavelength bands when the LED light source obtains white light.
In some embodiments of the present invention, the illumination spectrum of the LED lamp is a white light spectrum, and the quantum dots and/or the phosphor includes quantum dots and/or phosphors with missing wavelength bands and non-missing wavelength bands when the LED light source obtains white light.
In some embodiments of the present invention, the illumination spectrum of the LED luminaire is a monochromatic plant-complementary illumination spectrum or a full-spectrum plant-complementary illumination spectrum.
In some embodiments of the invention, the LED light source is a blue LED, and the quantum dots and/or the phosphor comprise red quantum dots and/or red phosphor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a spectral distribution diagram of white illumination light obtained according to embodiment 1 of the present invention.
Fig. 2 is a spectral distribution diagram of white illumination light obtained according to comparative example 2 of the present invention.
Fig. 3 is a spectral distribution diagram of white illumination light obtained in comparative example 3 according to the present invention.
Fig. 4 is a spectral distribution diagram of white illumination light obtained according to comparative example 4 of the present invention.
Fig. 5 is a spectral distribution diagram of white illumination light obtained in comparative example 5 according to the present invention.
FIG. 6 is a spectral distribution diagram of illumination light for plant fill lighting, according to one embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an LED lamp according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an LED lamp according to still another embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
According to a first aspect of the invention, the invention provides a method for regulating and controlling an illumination spectrum of an LED lamp. According to an embodiment of the invention, the method comprises: the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate of the LED lamp, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of an LED light source, so that illumination light with a required color is realized. The method can lead the quantum dots and/or the fluorescent powder to be far away from the LED chip by dispersing the quantum dots and/or the fluorescent powder in the diffusion plate, and the temperature and the light intensity of the quantum dots and/or the fluorescent powder are low, thereby being beneficial to improving the stability and the service life of the quantum dots or the fluorescent powder; in addition, the diffusion plate is large in size, so that the proportion and concentration of quantum dots and/or fluorescent powder in various wave bands can be matched flexibly, the heat dissipation problem of the lamp during lighting cannot be influenced, spectral design can be carried out in a visible light wavelength range according to actual needs to obtain lighting light with required colors, the stability of lighting spectrums can be improved remarkably, the service life of an LED lamp can be prolonged, and the LED lamp can be widely applied to the fields of daily lighting, plant supplementary lighting, stage lighting, beauty lighting, sterilizing lighting and the like.
The method for regulating and controlling the illumination spectrum of the LED lamp according to the above embodiment of the present invention is described in detail below.
According to an embodiment of the present invention, the desired color and intensity ratio of the illumination light can be obtained by adjusting the mixing ratio and the doping amount of the quantum dots and/or the phosphors corresponding to different wavelength bands in the diffuser plate, for example, when a white light spectrum is required, a blue LED light source can be used, and the yellow quantum dots and/or the yellow phosphors and the red quantum dots and/or the red phosphors are dispersed in the diffuser plate, and the white illumination light can be obtained by adjusting the mixing ratio and the doping amount of the red and yellow quantum dots and/or the phosphors. It should be noted that the quantum dots and/or phosphors with different wavelength bands refer to quantum dots and/or phosphors capable of emitting different colors under the excitation of a light source, and the colors displayed by the different quantum dots and/or phosphors under the excitation of the light source correspond to different wavelength ranges.
According to another embodiment of the present invention, the diffuser plate containing different quantum dots and/or phosphors can be replaced to obtain different colors of illumination light, in the practical application process, the mixing ratio and the doping amount of the quantum dots and/or phosphors in each diffuser plate are fixed, and the color of the illumination light emitted through the diffuser plate is also fixed under the irradiation of the LED light source with a specific color.
According to still another embodiment of the present invention, the quantum dots and/or the phosphor may be uniformly distributed in the diffusion plate, whereby the uniformity of the illumination light may be further improved. Further, the quantum dots and/or the fluorescent powder can be distributed on one side of the diffusion plate far away from the LED light source and/or in the middle position of the diffusion plate, so that the quantum dots and/or the fluorescent powder can be further far away from the LED chip, the temperature and the light intensity of the quantum dots and/or the fluorescent powder are lower, and the stability and the service life of the quantum dots or the fluorescent powder are further favorably improved.
According to another embodiment of the present invention, the color of the LED light source used in the LED lamp of the present invention is not particularly limited, and those skilled in the art can select the LED light source according to actual needs, for example, the LED light source can be a blue LED or a violet LED, and in actual operation, the kind of the quantum dots and/or the phosphors doped in the diffusion plate can be selected according to the light emitting color of the LED light source and the color of the illumination light required, so that the light emitting color of the LED light source and the color displayed by the quantum dots and/or the phosphors under excitation of the light source are mixed to obtain the illumination light with the required color.
According to another embodiment of the present invention, when the desired illumination spectrum is a white light spectrum, it is preferable that at least a portion of the quantum dots and/or the phosphors is quantum dots and/or phosphors that lack wavelength bands when the LED light source obtains white light, for example, when the LED light source displays blue color, the illumination spectrum also lacks wavelength bands corresponding to red light, orange light, yellow light, and green light compared to visible light, and at this time, the diffusion plate may include a plurality of quantum dots and/or phosphors that can display red light, orange light, yellow light, and green light under the excitation of the light source, and the light emitted from the LED light source may be mixed with the light emitted from the respective quantum dots and/or phosphors to form a white light spectrum when the diffusion plate is excited. More preferably, when the illumination spectrum is a white light spectrum, the quantum dots and/or phosphors may include quantum dots and/or phosphors that lack a wavelength band and do not lack a wavelength band when the LED light source obtains white light, for example, the diffusion plate may include a plurality of quantum dots and/or phosphors that can display blue light, red light, orange light, yellow light, and green light when the LED light source is excited to emit light, and at this time, the illumination light having a white light spectrum may be obtained regardless of the color of light displayed by the LED light source as long as the wavelength of the LED light source is shorter than the wavelength of the excited light emission.
According to another embodiment of the present invention, the illumination spectrum may be a monochromatic plant-complementary illumination spectrum or a full-spectrum plant-complementary illumination spectrum, and therefore, the display color of the LED light source and the composition of the quantum dots and/or the phosphor powder doped in the diffusion plate may be selected according to the actual complementary illumination requirement to promote plant growth, for example, when only blue and red light components are required in the plant-complementary illumination spectrum and the ratio of blue to red light is required to be approximately 1:3, if the LED light source is a blue LED, only red quantum dots and/or red phosphor powder with corresponding wavelengths need to be added in the diffusion plate, and the illumination light with the required light intensity ratio can be obtained by controlling the concentration. Preferably, the LED lamp may include a plurality of diffusion plates having different quantum dots and/or phosphors, so that different diffusion plates may be selected according to an actual growth stage of a plant to obtain a desired fill light color.
According to another embodiment of the present invention, the total doping amount of the quantum dots and/or the phosphor in the diffusion plate may be 0.01 to 1 wt%, for example, 0.01 wt%, 0.02 wt%, 0.05 wt%, 0.08 wt%, 0.1 wt%, 0.15 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, or 1 wt%, etc., and the inventors found that, if the total amount of the quantum dots and/or the phosphor is too small, the quantum dots and/or the phosphor show a weak color intensity under excitation of the light source, and cannot improve the spectral distribution of the illumination light well and obtain a desired illumination color, if the total doping amount of the quantum dots and/or the phosphor is too high, not only the raw material cost is greatly increased, but also the light transmittance of the diffusion plate is reduced, therefore, the light-emitting rate of the diffusion plate is reduced, the illumination intensity is greatly weakened, and the lighting effect of the lamp is reduced. The power of the lamp can be increased when the same illumination intensity is required, and the energy conservation and the environmental protection are not facilitated. According to the invention, by controlling the total doping amount of the quantum dots and/or the fluorescent powder within the range, the spectral distribution of the illuminating light can be obviously improved, the diffusion plate can be ensured to have better light transmittance, and the illuminating light with expected color can be obtained on the basis of considering both the raw material cost and the illumination intensity.
In summary, compared with the prior art, the method for regulating and controlling the illumination spectrum of the LED lamp according to the above embodiment of the present invention has the following advantages: 1. the quantum dots and/or the fluorescent powder are far away from the LED chip, and the temperature and the light intensity of the quantum dots and/or the fluorescent powder are low, so that the stability and the service life of the quantum dots or the fluorescent powder are favorably improved; 2. the diffusion plate is large in size, can be flexibly matched with the proportion and concentration of quantum dots and/or fluorescent powder in various wave bands, and cannot influence the heat dissipation problem of the lamp during illumination; 3. the distribution of the required spectrum can be more conveniently adjusted by fully utilizing the light-emitting wavelengths of different quantum dots and/or fluorescent powder, and the spectrum design is carried out on any required wave band in the visible light wavelength range, for example, the full-wave band white light illumination can be realized by matching with the quantum dots with different light-emitting wave bands; 4. the diffusion plate containing different quantum dots or fluorescent powder can be replaced and changed to obtain the illuminating light with different colors; 5. special lighting design can be carried out according to actual needs, and daily lighting, plant supplementary lighting, stage lighting, beauty lighting, sterilization lighting and the like can be realized.
Based on the same inventive concept, according to a second aspect of the invention, the invention provides an LED lamp. According to an embodiment of the present invention, referring to fig. 7 or 8, the LED lamp includes: the light source comprises a diffusion plate 10, quantum dots and/or fluorescent powder 11 are dispersed in the diffusion plate 10, and the quantum dots and/or fluorescent powder 11 are suitable for generating a spectrum of a desired waveband under the excitation of the LED light source 20 to realize illumination light of a required color. Compared with the prior art, the quantum dots and/or the fluorescent powder in the LED lamp are far away from the LED chip, the temperature and the light intensity are low, the stability of the quantum dots and/or the fluorescent powder is better, the service life is longer, the stability of an illumination spectrum can be obviously improved on the basis of obtaining illumination light with expected color, and the service life of the LED lamp can be prolonged.
According to an embodiment of the present invention, quantum dots and/or phosphors 11 corresponding to different wavelength bands may be dispersed in the diffusion plate 10. The mixing proportion and the doping amount of the quantum dots and/or the fluorescent powder corresponding to different wave bands in the diffusion plate are different, the color and the light intensity proportion of the illumination light generated by the LED lamp are also different, the illumination light with the expected color and the light intensity proportion can be generated by the LED lamp by adjusting the mixing proportion and the doping amount of the quantum dots and/or the fluorescent powder corresponding to different wave bands in the diffusion plate, for example, when a white light spectrum is required to be obtained, a blue LED light source can be adopted, yellow quantum dots and/or yellow fluorescent powder and red quantum dots and/or red fluorescent powder are dispersed in the diffusion plate, and white illumination light is obtained by adjusting the mixing proportion of the red and yellow quantum dots and/or the fluorescent powder and the doping amount of the quantum dots and/or the fluorescent powder in the diffusion plate. It should be noted that the quantum dots and/or phosphors with different wavelength bands refer to quantum dots and/or phosphors with different colors under the excitation of a light source, and the colors displayed by the different quantum dots and/or phosphors under the excitation of the light source correspond to different wavelength ranges.
According to another embodiment of the present invention, the LED lamp can be matched with a plurality of diffusion plates 10, the composition of the quantum dots and/or the phosphors 11 dispersed in the diffusion plates 10 is different, so that the diffusion plates containing different quantum dots and/or phosphors can be replaced to obtain different colors of illumination light, in the practical application process, the mixing ratio and the doping amount of the quantum dots and/or the phosphors in each diffusion plate are fixed, and the color of the illumination light emitted through the diffusion plate is also fixed under the irradiation of the LDE light source with a specific color.
According to still another embodiment of the present invention, the quantum dots and/or the phosphors 11 may be uniformly distributed in the diffusion plate 10, whereby the uniformity of the illumination light may be further improved. Further, the quantum dots and/or phosphors 11 may be distributed on a side of the diffusion plate 10 away from the LED light source (as understood with reference to fig. 8) and/or at an intermediate position of the diffusion plate, so that the quantum dots and/or phosphors may be further away from the LED chip, and the temperature and light intensity experienced by the quantum dots and/or phosphors may be lower, thereby further facilitating the improvement of the stability and lifetime of the quantum dots or phosphors.
According to another embodiment of the present invention, the color of the LED light source used in the LED lamp of the present invention is not particularly limited, and those skilled in the art can select the LED light source according to actual needs, for example, the LED light source can be a blue LED or a violet LED, and in actual operation, the kind of the quantum dots and/or the phosphors doped in the diffusion plate can be selected according to the light emitting color of the LED light source and the color of the illumination light required, so that the light emitting color of the LED light source and the color displayed by the quantum dots and/or the phosphors under excitation of the light source are mixed to obtain the illumination light with the required color.
According to another embodiment of the present invention, the total doping amount of the quantum dots and/or the phosphor 11 in the diffusion plate 10 is 0.01 to 1 wt%, for example, 0.01 wt%, 0.02 wt%, 0.05 wt%, 0.08 wt%, 0.1 wt%, 0.15 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, or 1 wt%, etc., and the inventors found that, if the total amount of the quantum dots and/or the phosphor is too small, the quantum dots and/or the phosphor show a weak color intensity under excitation of the light source, and cannot improve the spectral distribution of the illumination light well and obtain a desired illumination color, if the total doping amount of the quantum dots and/or the phosphor is too high, not only the raw material cost is greatly increased, but also the light transmittance of the diffusion plate is reduced, therefore, the light-emitting rate of the diffusion plate is reduced, the illumination intensity is greatly weakened, and the lighting effect of the lamp is reduced. The power of the lamp can be increased when the same illumination intensity is required, and the energy conservation and the environmental protection are not facilitated. According to the invention, by controlling the total doping amount of the quantum dots and/or the fluorescent powder within the range, the spectral distribution of the illuminating light can be obviously improved, the diffusion plate can be ensured to have better light transmittance, and the illuminating light with expected color can be obtained on the basis of considering both the raw material cost and the illumination intensity.
According to another embodiment of the present invention, the illumination spectrum of the LED lamp may be a white light spectrum, where at least a portion of the quantum dots and/or the phosphors in the diffusion plate are quantum dots and/or phosphors that lack wavelength bands when the LED light source obtains white light, for example, when the color displayed by the LED light source is blue, the illumination spectrum of the diffusion plate also lacks wavelength bands corresponding to red light, orange light, yellow light, and green light compared to visible light, and at this time, the diffusion plate may include a plurality of quantum dots and/or phosphors that can display red light, orange light, yellow light, and green light under the excitation of the light source, and the light emitted by the LED light source may be mixed with the light displayed by each quantum dot and/or phosphor to form a white light spectrum; more preferably, when the illumination spectrum is a white light spectrum, the quantum dots and/or phosphors may include quantum dots and/or phosphors that lack a wavelength band and do not lack a wavelength band when the LED light source obtains white light, for example, the diffusion plate may include a plurality of quantum dots and/or phosphors that can display blue light, red light, orange light, yellow light, and green light when the LED light source is excited to emit light, and at this time, the illumination light having a white light spectrum may be obtained regardless of the color of light displayed by the LED light source as long as the wavelength of the LED light source is shorter than the wavelength of the excited light emission.
According to another embodiment of the present invention, the illumination spectrum of the LED lamp can be a monochromatic plant supplement illumination spectrum or a full spectrum plant supplement illumination spectrum, so that the display color of the LED light source and the composition of the quantum dots and/or the phosphor powder doped into the diffusion plate can be selected according to the actual supplement requirement to promote the plant growth, for example, referring to fig. 6, when only blue and red light components are required in the plant supplement illumination spectrum and the ratio of the blue light to the red light is required to be approximately 1:3, if the LED light source is a blue LED, only red quantum dots and/or red phosphor powder with corresponding wavelengths need to be added into the diffusion plate, and the illumination light with the required light intensity ratio can be obtained after controlling the concentration. Preferably, the LED lamp may include a plurality of diffusion plates having different quantum dots and/or phosphors, so that different diffusion plates may be selected according to an actual growth stage of a plant to obtain a desired fill light color.
In summary, compared with the prior art, the LED lamp of the above embodiment of the present invention has the following advantages: 1. the quantum dots and/or the fluorescent powder are far away from the LED chip, the temperature and the light intensity of the quantum dots and/or the fluorescent powder are low, the stability of the quantum dots or the fluorescent powder is good, and the service life is long; 2. the diffusion plate is large in size, can be flexibly matched with the proportion and concentration of quantum dots and/or fluorescent powder in various wave bands, and cannot influence the heat dissipation problem of the lamp during illumination; 3. the distribution of the required spectrum can be more conveniently adjusted by fully utilizing the light-emitting wavelengths of different quantum dots and/or fluorescent powder, and the spectrum design is carried out on any required wave band in the visible light wavelength range, for example, the full-wave band white light illumination can be realized by matching with the quantum dots with different light-emitting wave bands; 4. the diffusion plate containing different quantum dots or fluorescent powder can be replaced and changed to obtain the illuminating light with different colors; 5. the special lighting design can be carried out according to actual needs, so that the LED lamp can meet the lighting requirements of daily lighting, plant light supplement lighting, stage lighting, beauty lighting, sterilization lighting and the like.
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
When the LED lamp is prepared, the blue LED is adopted, no fluorescent powder or quantum dots are added in glue water when the blue LED is packaged, and 0.4 wt% of quantum dots are mixed in the diffusion plate, wherein the quantum dots comprise red quantum dots, orange quantum dots, yellow quantum dots and green quantum dots. The illumination spectrum of the LED lamp is shown in fig. 1.
Example 2
The difference from example 1 is that: 0.6 wt% of phosphor was mixed into the diffuser plate, wherein the phosphor composition included red phosphor, orange phosphor, yellow phosphor and green phosphor, and the ratio of the phosphors of each color was the same as that of example 1. Wherein, the distribution of the lighting spectrum wave band of the LED lamp is similar to that of figure 1.
Example 3
The difference from example 1 is that: 0.2 wt% of quantum dots are mixed in the diffusion plate, wherein the composition of the quantum dots comprises red quantum dots and cyan quantum dots. And packaging the blue LED by using common yellow fluorescent powder glue, wherein the final lighting spectral distribution of the LED lamp is similar to that of the LED lamp shown in figure 1.
Comparative example 1
The difference from example 1 is that: 2 wt% of quantum dots were mixed in the diffuser plate, and the composition of the quantum dots was the same as that of example 1. The lighting spectral band distribution of the LED lamp is similar to that of fig. 1, but the illumination intensity is relatively weak.
Comparative example 2
The difference from example 1 is that: and any quantum dots and fluorescent powder are not added in the LED and the diffusion plate packaged by the common yellow fluorescent glue. The illumination spectrum of the LED lamp is shown in fig. 2.
Comparative example 3
The difference from example 1 is that: the diffusion plate was not added with any quantum dots and phosphor, and the total amount of red phosphor and yellow phosphor added in the encapsulation glue was 0.2 wt%, and the sources of the phosphors were the same as in example 1. The illumination spectrum of the LED lamp is shown in fig. 3.
Comparative example 4
The difference from example 1 is that: the diffusion plate was not added with any quantum dots and phosphor, and the encapsulation glue was mixed with 0.3 wt% of the total amount of green phosphor and red phosphor, the sources of which were the same as those in example 1. The illumination spectrum of the LED lamp is shown in fig. 4.
Comparative example 5
The difference from example 1 is that: the purple light LED is adopted, no quantum dot and any fluorescent powder are added into the diffusion plate, blue fluorescent powder, green fluorescent powder and red fluorescent powder with the total addition of 0.6 wt% are mixed into the packaging glue, and the sources of the fluorescent powder are the same as those in the embodiment 1. The illumination spectrum of the LED lamp is shown in fig. 5.
As can be seen from the comparison of the emission spectra of the embodiment 1 and the comparative examples 2 to 5, the white illumination light generated by the LED lamp of the embodiment of the present application has spectral distribution in each wavelength band, and full-spectrum white illumination can be realized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for regulating and controlling an illumination spectrum of an LED lamp is characterized by comprising the following steps: the quantum dots and/or the fluorescent powder are dispersed in the diffusion plate of the LED lamp, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of an LED light source, so that illumination light with a required color is realized.
2. The method of claim 1, wherein at least one of the following conditions is satisfied:
the illumination light with expected color and light intensity ratio is obtained by adjusting the mixing ratio and the doping amount of quantum dots and/or fluorescent powder in the diffusion plate corresponding to different wave bands;
and different colors of illuminating light can be obtained by replacing the diffusion plate consisting of different quantum dots and/or fluorescent powder.
3. The method of claim 1, wherein the LED light source is a blue LED or a violet LED.
4. The method of claim 1, wherein at least one of the following conditions is satisfied:
the illumination spectrum is a white light spectrum, and at least one part of the quantum dots and/or the fluorescent powder are quantum dots and/or fluorescent powder which lack wave bands when the LED light source obtains white light;
the illumination spectrum is a white light spectrum, and the quantum dots and/or the fluorescent powder comprise quantum dots and/or fluorescent powder of a missing waveband and a non-missing waveband when an LED light source obtains white light.
5. The method of claim 1, wherein the illumination spectrum is a monochromatic plant-complementary illumination spectrum or a full-spectrum plant-complementary illumination spectrum.
6. The method of claim 5, wherein the LED light source is a blue LED and the quantum dots and/or the phosphor comprise red quantum dots and/or red phosphor.
7. The method according to any one of claims 1 to 6, wherein the total doping amount of the quantum dots and/or the phosphor in the diffusion plate is 0.01 to 1 wt%.
8. An LED lamp, comprising: the LED light source comprises a diffusion plate, wherein quantum dots and/or fluorescent powder are dispersed in the diffusion plate, and the quantum dots and/or the fluorescent powder are suitable for generating a spectrum of an expected waveband under the excitation of the LED light source to realize illumination light of a required color.
9. The LED light fixture of claim 8 wherein at least one of the following conditions is satisfied:
quantum dots and/or fluorescent powder corresponding to different wave bands are dispersed in the diffusion plate;
the LED lamp is matched with the diffusion plates, and the compositions of the quantum dots and/or the fluorescent powder dispersed in the diffusion plates are different;
the quantum dots and/or the fluorescent powder are uniformly distributed in the diffusion plate;
the quantum dots and/or the fluorescent powder are distributed on one side and/or the middle position, far away from the LED light source, of the diffusion plate;
the LED light source is a blue LED or a purple LED;
in the diffusion plate, the total doping amount of the quantum dots and/or the fluorescent powder is 0.01-1 wt%.
10. LED lamp according to claim 8 or 9, characterized in that at least one of the following conditions is fulfilled:
the lighting spectrum of the LED lamp is a white light spectrum, and at least one part of the quantum dots and/or the fluorescent powder are quantum dots and/or fluorescent powder which are lost in wave bands when the LED light source obtains white light;
the lighting spectrum of the LED lamp is a white light spectrum, and the quantum dots and/or the fluorescent powder comprise quantum dots and/or fluorescent powder of a missing waveband and a non-missing waveband when an LED light source obtains white light;
the lighting spectrum of the LED lamp is a monochromatic plant lighting compensation spectrum or a full-spectrum plant lighting compensation spectrum;
the LED light source is a blue LED, and the quantum dots and/or the fluorescent powder comprise red quantum dots and/or red fluorescent powder.
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