CN115763672A - Near-natural light LED packaging component, packaging method and lighting device - Google Patents
Near-natural light LED packaging component, packaging method and lighting device Download PDFInfo
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Abstract
The invention discloses a near-natural light LED packaging component, a packaging method and a lighting device, wherein a blue light chip is normally mounted in the near-natural LED packaging component and directly emits light upwards without reflection, and the light parameter efficiency and brightness of an LED light source can be increased.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a near-natural-light LED packaging component, a packaging method and an illumination device.
Background
The LED chips in the LED light source device are mainly divided into a positive mounting mode and a reverse mounting mode. When the flip-chip type LED light source device is adopted, emitted light is emitted downwards firstly, then is emitted upwards after being reflected, and part of light can be lost, so that the light parameter efficiency of the LED light source device is not high, the brightness is low, and therefore the forward packaging of an LED chip is paid more and more attention.
The normal packaging of the LED chip needs to spray fluorescent powder on the chip to form a fluorescent powder film layer on the chip, but the spraying process has high requirements on equipment and great difficulty in process operation.
On the other hand, the spectrum formed by the LED light source which is normally installed in the prior art has the problems of more blue light spectrum quantity and less red light spectrum quantity. When the red light is applied to the emmetropic eye, the hypermetropia effect generated by the red light can delay the continuous extension of the eye axis, and the effect of preventing the development of myopia is achieved. Therefore, strengthening the red light spectrum in the LED light source spectrum and weakening the blue light spectrum so as to form a near-natural spectrum has very important significance for reducing eye fatigue and preventing myopia.
Therefore, the LED chip is packaged in a normal mode, the equipment requirement can be reduced, the process difficulty can be controlled, and an LED light source close to natural light can be formed.
Disclosure of Invention
The invention aims to: aiming at the problems that the requirement on fluorescent layer preparation equipment is high, the process difficulty is high and full-color bionic spectrum close to natural light cannot be formed in an LED light source with a positively-mounted chip in the prior art, a near-natural light LED packaging member, a packaging method and a lighting device are provided. The normally-installed blue light chip in the near-natural LED light source is a normally-installed chip, light is directly emitted upwards, reflection is not needed, and the light parameter efficiency and the brightness of the LED light source can be increased.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a nearly natural light LED encapsulation component, include at least one light emitting component and with the electric connector that light emitting component electricity is connected, light emitting component includes a panchromatic bionical luminescence unit, panchromatic bionical luminescence unit is in from the dress blue light chip down upwards in proper order some glue at least two-layer phosphor layer that form on the dress blue light chip, the light that panchromatic bionical luminescence unit sent is the nearly natural light of wavelength at 400-700nm scope, and the absolute spectral power of 640 to 700nm wave band is greater than 0.7 in the nearly natural light.
The normally-installed blue light chip in the near-natural LED light source is a normally-installed chip, light is directly emitted upwards, reflection is not needed, and the light parameter efficiency and the brightness of the LED light source can be increased.
Further, 2-3 layers of fluorescent powder layers are sequentially formed on the positively-mounted blue light chip by dispensing from bottom to top. A large number of experimental researches find that one fluorescent powder layer cannot form a near-natural light spectrum, more than three layers excessively increase the manufacturing cost, and the error rate is high.
Further, when the full-color bionic light-emitting unit comprises three phosphor layers, a first phosphor layer, a second phosphor layer and a third phosphor layer are sequentially arranged along the front blue light-emitting chip from bottom to top; the first phosphor layer comprises first phosphor, the second phosphor layer comprises second phosphor, and the third phosphor layer comprises third phosphor;
the light-emitting wavelength of the first fluorescent powder is 480 nm-500 nm;
the light-emitting wavelength of the second fluorescent powder is more than 500nm and less than 620nm;
the light-emitting wavelength of the third fluorescent powder is greater than or equal to 620nm;
the mass ratio of the first fluorescent powder to the second fluorescent powder to the third fluorescent powder is (17 to 67): (18 to 65): (15 to 65).
The application provides the fluorescent proportioning of the three fluorescent powder layers, the mass ratio of the first fluorescent powder, the second fluorescent powder and the third fluorescent powder is controlled within the range by controlling the mass ratio of the components in the second fluorescent powder and the third fluorescent powder, the absolute luminous power values of the white light generated by the fluorescent composition can be adjusted, the spectrum of the generated white light can be optimized, for example, the red light power of the white light within the wavelength range of 640 to 700nm is high and is closer to natural light, the comfort level of the white light when being applied to illumination and the reality degree of the white light to the environment and articles are improved, and the harm to human bodies are reduced.
Further, in the above-mentioned case,
the first fluorescent powder comprises fluorescent powder A; the light-emitting wavelength of the fluorescent powder A is 488 to 492nm;
the second fluorescent powder comprises fluorescent powder B, and the light-emitting wavelength of the fluorescent powder B is 523 to 542nm;
the third fluorescent powder comprises fluorescent powder C, fluorescent powder D, fluorescent powder E and fluorescent powder F, the luminous wavelength of the fluorescent powder C is 628-681 nm, the luminous wavelength of the fluorescent powder D is 718-722nm, the luminous wavelength of the fluorescent powder E is 738-742nm, and the luminous wavelength of the fluorescent powder F is 793-797 nm.
Further, the fluorescent powder B in the second fluorescent powder comprises a fluorescent powder B1 and a fluorescent powder B2, the light-emitting wavelength of the fluorescent powder B1 is 523 to 527nm, the light-emitting wavelength of the fluorescent powder B2 is 538 to 542nm, and the mass ratio of the fluorescent powder B1 to the fluorescent powder B2 is (22 to 80): (13 to 82);
the fluorescent powder C in the third fluorescent powder comprises fluorescent powder C1, fluorescent powder C2 and fluorescent powder C3, the luminous wavelength of the fluorescent powder C1 is 628-632nm, the luminous wavelength of the fluorescent powder C2 is 658-662nm, the luminous wavelength of the fluorescent powder C3 is 677-681nm, and the mass ratio of the fluorescent powder C1, the fluorescent powder C2, the fluorescent powder C3, the fluorescent powder D, the fluorescent powder E and the fluorescent powder F is (5-30): (4 to 40) (5 to 57): (10 to 85): (10 to 55): (3 to 65).
Further, when the full-color bionic light-emitting unit comprises two fluorescent powder layers, a fourth fluorescent powder layer and a fifth fluorescent powder layer are sequentially arranged along the front blue light-emitting chip from bottom to top;
the fourth phosphor layer includes a first mixture; the fifth phosphor layer includes a second mixture;
the phosphor C in the third phosphor forms a first mixture with the first phosphor and the second phosphor;
the fluorescent powder D, the fluorescent powder E and the fluorescent powder F in the third fluorescent powder form a second mixture,
in the first mixture, the mass ratio of the fluorescent powder A to the fluorescent powder B to the fluorescent powder C is (12 to 75): (18 to 80): (3 to 35);
in the second mixture, the mass ratio of the fluorescent powder D to the fluorescent powder E to the fluorescent powder F is (22-110): (12 to 85): (3 to 95);
the raw materials of the fluorescent powder layers on the two sides are provided, and the wavelength and mass ratio of the raw materials can ensure that the red light power of the white light in the wavelength range of 640 to 700nm is high and is closer to natural light, so that the comfort level of the white light when the white light is applied to illumination and the reality degree of the white light embodied to the environment and articles are improved, and the harm to a human body is reduced.
Furthermore, the light-emitting wavelength of the positively-installed blue light chip is 440 nm-475 nm.
Furthermore, the thickness of each layer of fluorescent powder layer is less than or equal to 0.25mm. Researches find that the fluorescent powder layer is too thick, and a full-color bionic spectrum close to natural light is not easy to obtain. Preferably, the thickness of each phosphor layer is 0.1mm to 0.25mm. More preferably, the thickness of each phosphor layer is 0.15mm to 0.25mm.
Further, each layer of phosphor layer comprises phosphor powder and glue.
Furthermore, the total mass of the fluorescent powder in each layer of fluorescent powder layer accounts for 50-80%.
Another object of the present invention is to provide another near natural light LED package member.
A near-natural-light LED packaging component comprises at least one light-emitting component and an electric connector electrically connected with the light-emitting component, wherein the light-emitting component comprises at least two first light-emitting units, each first light-emitting unit comprises a forward blue light chip and at least two layers of fluorescent powder layers sequentially formed on the forward blue light chip through glue dispensing from bottom to top, all light emitted by the first light-emitting units in the same light-emitting component can be mixed to form near-natural light with the wavelength of 400-700nm, and the absolute spectral power of the 640-700nm waveband in the near-natural light is larger than 0.7.
The light-emitting assembly comprises at least two first light-emitting units, and the at least two first light-emitting units can comprise the full-color bionic light-emitting unit disclosed by the application or do not comprise the full-color bionic light-emitting unit. When the at least two first light-emitting units do not comprise the full-color bionic light-emitting unit, the light emitted by the at least two first light-emitting units can be mixed to form near natural light within the range of 400-700nm, and the absolute spectral power of the wave band from 640 to 700nm in the near natural light is more than 0.7.
Furthermore, in the same light-emitting assembly, at least one of all the first light-emitting units is a full-color bionic light-emitting unit.
Furthermore, the difference between the peak wavelengths of at least two forward blue light chips in the same light emitting assembly is more than 5nm, and the distance between the wavelength bands of two first light emitting units in adjacent wavelength bands in the same light emitting assembly is not more than 10nm. Compared with a front blue light chip with the same peak wavelength, the blue light absolute spectral power can be effectively improved, the problem of low blue light existing in near-natural light research for a long time is solved, quasi-natural light is closer to real natural light, and the color rendering index is further improved. Preferably, the peak wavelengths of all the forward blue light chips in the same light emitting assembly are different, and the peak wavelength interval between any two forward blue light chips is more than 5nm.
Another object of the present application is to provide a method for packaging the near-natural light LED package member.
The packaging method of the near-natural-light LED packaging component comprises the following steps,
and 3, sequentially dispensing on the surface of the front blue light chip from bottom to top to form at least two fluorescent powder layers.
The invention discloses a packaging method of a near-natural-light LED packaging component, which comprises the following steps: step 1, fixing the positively-mounted blue light chips in all the light-emitting assemblies on a support; step 2, electrically connecting the forward blue light chips and the forward blue light chips with the bracket by using an electric connecting piece; and 3, sequentially dispensing on the surface of the positively-mounted blue light chip from bottom to top to form at least two layers of fluorescent powder layers. The packaging method is simple to operate and convenient to control.
Further, still include on the support, the outside circumference installation of blue light chip sets up the box dam.
Further, when the two adjacent fluorescent powder layers are subjected to dispensing, a drying and curing process is performed at intervals.
Another object of the present invention is to provide a lighting device including the above-described near-natural-light LED package member.
A lighting device comprises the near-natural light LED packaging component.
The invention provides a lighting device which comprises a near natural light LED packaging component provided by the application, wherein the lighting device can emit near natural light with the wavelength of 400-700nm, the absolute spectral power of the wave band from 650 to 700nm in the near natural light is greater than 0.75, the spectrum strengthens the red light spectrum in the spectrum of an LED light source and weakens the blue light spectrum, and thus the near natural spectrum is formed, and the lighting device has very important significance for reducing eye fatigue and preventing myopia.
Explanation of technical terms:
spectral power:
the spectrum emitted by a light source is often not a single wavelength, but consists of a mixture of many different wavelengths. The spectral radiation of the light source in wavelength order and the intensity distribution of the individual wavelengths is referred to as the spectral power distribution of the light source.
The parameters for characterizing the magnitude of the spectral power are divided into absolute spectral power and relative spectral power. And then the absolute spectral power distribution curve: refers to a curve drawn with absolute values of the energy of various wavelengths of the spectral radiation;
relative spectral power distribution curve: the spectral power distribution curve is a spectral power distribution curve that compares energies of various wavelengths of a light source radiation spectrum with each other, and changes radiation power only within a predetermined range after normalization processing. The relative spectral power with the maximum radiation power is 1, and the relative spectral power of other wavelengths is less than 1.
Color ratio:
any white light can be obtained by mixing the three primary colors of red, green and blue in corresponding proportion, and chromaticity coordinates R, G and B are introduced to represent the relative proportion of the three primary colors of R, G and B in the total white light, wherein R = R/(R + G + B), G = G/(R + G + B), B = B/(R + G + B), and R + G + B =1, and R, G and B are respectively the red light color ratio, the green light color ratio and the blue light color ratio.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the application discloses nearly natural light LED encapsulates component, including the support, set up in at least one light emitting component on the support and with the electric connector that the light emitting component electricity is connected, light emitting component includes a full-color bionic light emitting unit, full-color bionic light emitting unit is including just adorning blue light chip and going up from the at least two-layer phosphor layer of upwards dispensing formation in proper order down. The normally-installed blue light chip in the near-natural LED light source is a normally-installed chip, light is directly emitted upwards, reflection is not needed, and the light parameter efficiency and the brightness of the LED light source can be increased.
2. The application provides the fluorescent proportioning of three fluorescent powder layers, the mass ratio of the first fluorescent powder, the second fluorescent powder and the third fluorescent powder is controlled within the range, the absolute optical power values of different wave bands of white light generated by the fluorescent composition can be adjusted, and the spectrum of the generated white light can be optimized, for example, the red light power of the white light within the wavelength range of 640 to 700nm is high and is closer to natural light, the comfort degree of the white light applied to illumination and the reality degree of the white light reflected to the environment and articles are improved, and the harm to a human body is reduced.
3. The raw materials of the fluorescent powder layers on the two sides are provided, and the wavelength and mass ratio of the raw materials enables the red light power of the white light within the wavelength range of 640-700nm to be high and to be closer to natural light, so that the comfort degree of the white light when the white light is applied to illumination and the reality degree of the white light embodied to the environment and articles are improved, and the harm to a human body is reduced.
4. The application also provides a near natural light LED encapsulation component, including the support, set up in at least one light emitting component on the support and with the electric connector that light emitting component electricity is connected, including at least two first luminescence units in the light emitting component, at least two can include the bionical luminescence unit of panchromatic that this application discloses in the first luminescence unit, also can not include the bionical luminescence unit of panchromatic. When the at least two first light-emitting units do not comprise the full-color bionic light-emitting unit, the light emitted by the at least two first light-emitting units can be mixed to form near natural light within the range of 400-700nm, and the absolute spectral power of the wave band from 640 to 700nm in the near natural light is more than 0.7.
5. The invention discloses a packaging method of a near-natural-light LED packaging component, which comprises the following steps: step 1, fixing the positively-mounted blue light chips in all the light-emitting assemblies on a support; step 2, electrically connecting the forward blue light chips and the bracket by using an electric connecting piece; and 3, sequentially dispensing on the surface of the positively-mounted blue light chip from bottom to top to form at least two layers of fluorescent powder layers. The packaging method is simple to operate and convenient to control.
6. The invention provides a lighting device which comprises a near natural light LED packaging component provided by the application, wherein the lighting device can emit near natural light with the wavelength of 400-700nm, the absolute spectral power of a waveband from 640 to 700nm in the near natural light is larger than 0.7, and the spectrum strengthens a red light spectrum in an LED light source spectrum and weakens a blue light spectrum, so that the formed near natural spectrum has very important significance for reducing eye fatigue and preventing myopia.
Drawings
Fig. 1 is a schematic top view of a light emitting device provided in example 11.
Fig. 2 is a schematic sectional structure view of fig. 1.
Fig. 3 is a spectrum diagram of a near natural light LED package member provided in example 11 group.
Fig. 4 is a spectrum of a near natural light LED package member provided in example 12 group.
FIG. 5 is a spectrum of a near natural light LED package member provided in group EXAMPLE 13.
FIG. 6 is a spectrum of a near natural light LED package member provided in group example 14.
FIG. 7 is a schematic sectional view showing a light-emitting element in group 21.
Fig. 8 is a schematic sectional view of a light-emitting element in the group of embodiment 21.
Fig. 9 is a spectrum of a near natural light LED package member provided in example 21 group.
FIG. 10 is a spectrum of a near natural light LED package member provided in group 22.
Fig. 11 is a spectrum of a near natural light LED package member provided in example 23 group.
Fig. 12 is a spectrum diagram of a near natural light LED package member provided in comparative example 2 group.
FIG. 13 is a schematic top view of a light-emitting device provided in group 1-3.
FIG. 14 is a spectrum of a near natural light LED package member provided in group 3-1.
Fig. 15 is a schematic top view of a light-emitting element provided in group of embodiment 3-2.
FIG. 16 is a graph showing the emission spectra of the light-emitting units of the white light group in example 3-2.
FIG. 17 is a graph showing the emission spectra of the light-emitting units of the red group in the group of example 3-2.
Fig. 18 is a spectrum diagram of a near natural light LED package member provided in group of example 3-2.
FIG. 19 is a graph showing the emission spectra of the light-emitting units of the color light groups in examples 3-3.
FIG. 20 is a graph showing the emission spectra of the light-emitting units of the white light group in the group of examples 3-3.
FIG. 21 is a graph showing the emission spectra of the light-emitting units of the red group in example 3-3.
FIG. 22 is a spectrum diagram of a near natural light LED package member provided in example 3-3 group.
Icon: 1-a support; 11-a groove; 2-forward mounting a blue light chip; 21-gold wire; 3, enclosing a dam; 4-a first phosphor layer; 5-a second phosphor layer; 6-a third phosphor layer; 7-a fourth phosphor layer; 8-a fifth phosphor layer; 9-protective film layer.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and 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.
In the field of LED lighting, it is one of the development trends in this field to research lighting sources close to natural light, and many researchers and units have been in the direction of effort, and there are some lighting products in the prior art that aim to approach natural light, and generally refer to such products as "near natural light", where the light generated by such products is close to natural light in spectral shape (relative spectral power of corresponding wavelength band), and at least part of the optical parameters are close to natural light, and the degree of this proximity is not limited to a certain value. The near natural light LED package member in the following embodiments also aims to achieve a lighting effect closer to natural light and can increase the absolute spectral power of red light.
In the following embodiments, it is understood that the light emitting wavelength of the phosphor refers to the wavelength corresponding to the peak of the main peak of the spectrum generated by the excitation of the phosphor by photons.
In the following examples, the phosphors referred to may beComprising nitride, Y 3 AL 12 : c and fluoride. The fluorescent powder can be directly purchased or prepared according to the wavelength value.
Example 1
As shown in fig. 1 and 2, a near natural light LED package member provided in embodiment 1 includes at least one light emitting assembly, all of which are connected by an electrical connection; specifically, light emitting component includes support 1, the middle part of support 1 is provided with recess 11, and the inner wall of recess inclines to the middle part direction, be provided with the luminescence unit in the recess 11.
Specifically, the light-emitting assembly comprises a full-color bionic light-emitting unit, the full-color bionic light-emitting unit comprises a forward blue light-emitting chip 2 and at least two layers of fluorescent powder layers sequentially formed on the forward blue light-emitting chip 2 by dispensing from bottom to top, the forward blue light-emitting chip 2 is arranged at the bottom of the groove 11, and a gold wire 21 is connected between the forward blue light-emitting chip 2 and the bottom surface of the groove 11; the light emitted by the full-color bionic light-emitting unit is near natural light with the wavelength of 400-700nm, and the absolute spectral power of the wave band from 640 to 700nm in the near natural light is more than 0.7.
Preferably, 2 to 3 phosphor layers are sequentially formed on the front blue chip 2 by dispensing from bottom to top. The thickness of each fluorescent powder layer is less than or equal to 0.25mm.
In one embodiment, as shown in fig. 2, the full-color bionic light-emitting unit includes three phosphor layers, namely, a first phosphor layer 4, a second phosphor layer 5 and a third phosphor layer 6 in sequence from bottom to top along the front blue chip 2; the first phosphor layer 4 comprises first phosphor, the second phosphor layer 5 comprises second phosphor, and the third phosphor layer 6 comprises third phosphor; the light-emitting wavelength of the first fluorescent powder is 480 nm-500 nm; the light-emitting wavelength of the second fluorescent powder is more than 500nm and less than 620nm; the light-emitting wavelength of the third fluorescent powder is greater than or equal to 620nm; the mass ratio of the first fluorescent powder to the second fluorescent powder to the third fluorescent powder is (17-67): (18 to 65): (15 to 65).
Specifically, the first phosphor includes a phosphor A2,the phosphor A2 is Y with a light-emitting wavelength of 490nm 3 (Al，Ga) 5 O 12 。
The second fluorescent powder comprises fluorescent powder B1 and fluorescent powder B2, and the fluorescent powder B1 is BaSi with the luminous wavelength of 525nm 2 O 2 N 2 The phosphor B2 is BaSi with the light-emitting wavelength of 540nm 2 O 2 N 2 。
The third fluorescent powder comprises fluorescent powder C1, fluorescent powder C2, fluorescent powder C3, fluorescent powder D, fluorescent powder E and fluorescent powder F. The phosphor C1 is (Ca, sr) AlSiN with a luminescence wavelength of 630nm 3 The phosphor C2 is (Ca, sr) AlSiN with the light-emitting wavelength of 660nm 3 The phosphor C3 is (Ca, sr) AlSiN with the luminescent wavelength of 679nm 3 The phosphor D is (Ca, sr) AlSiN with a light-emitting wavelength of 720nm 3 The phosphor powder E is (Ca, sr) AlSiN with the light-emitting wavelength of 740nm 3 The phosphor F is (Ca, sr) AlSiN with a light-emitting wavelength of 795nm 3 。
A full-color bionic light-emitting unit of example 11 group includes a light-emitting component, as shown in fig. 1 and 2, the total mass ratio of the phosphors in each phosphor layer is 65%, the thickness of each phosphor layer is 0.25mm, the phosphor ratio is shown in table 1, and the spectrum of the obtained near-natural light is shown in fig. 3.
In the full-color bionic light-emitting unit of example 12, the total mass ratio of the phosphors in each phosphor layer was 50%, the thickness of each phosphor layer was 0.25mm, the phosphor ratio was shown in table 1, and the spectrum of the obtained near-natural light was shown in fig. 4.
In the full-color bionic light-emitting unit of example 13, the total mass ratio of the phosphors in each phosphor layer was 70%, the thickness of each phosphor layer was 0.15mm, the phosphor ratio was shown in table 1, and the spectrum of the obtained near-natural light was shown in fig. 5.
In the full-color bionic light-emitting unit of example 14, the total mass ratio of the phosphors in each phosphor layer is 80%, the thickness of each phosphor layer is 0.15mm, the phosphor ratio is shown in table 1, and the obtained spectrum of the near-natural light is shown in fig. 6.
TABLE 1
From the spectrograms obtained from the groups of examples 11 to 14, the light emitted by the full-color bionic light-emitting unit is near natural light with the wavelength ranging from 400 nm to 700nm, and the absolute spectral power of the wave band ranging from 640nm to 700nm in the near natural light is more than 0.7.
Example 2
As shown in fig. 1 and 2, a near natural light LED package member provided in embodiment 2 includes at least one light emitting device and an electrical connector electrically connected to the light emitting device; specifically, the light emitting assembly comprises a support 1, a groove 11 is formed in the middle of the support 1, the inner wall of the groove inclines towards the middle, and a light emitting unit is arranged in the groove 11.
Specifically, the light-emitting assembly comprises a panchromatic bionic light-emitting unit, the panchromatic bionic light-emitting unit comprises a normally-installed blue light chip 2 and at least two layers of fluorescent powder layers which are sequentially formed on the normally-installed blue light chip 2 through dispensing from bottom to top, the normally-installed chip 2 is arranged at the bottom of a groove 11, and a gold thread 21 is connected between the normally-installed blue light chip 2 and the bottom surface of the groove 11; the light emitted by the full-color bionic light-emitting unit is near natural light with the wavelength of 400-700nm, and the absolute spectral power of the wave band from 640 to 700nm in the near natural light is more than 0.7.
Preferably, 2 to 3 phosphor layers are sequentially dispensed from bottom to top on the front blue chip 2.
In one specific embodiment, the full-color bionic light-emitting unit comprises two phosphor layers, namely a fourth phosphor layer 7 and a fifth phosphor layer 8 from bottom to top along the front blue chip 2;
the fourth phosphor layer comprises a first mixture; the fifth phosphor layer comprises a second mixture;
the fluorescent powder C in the third fluorescent powder, the first fluorescent powder and the second fluorescent powder form a first mixture;
the phosphor D, the phosphor E and the phosphor F in the third phosphor form a second mixture,
in the first mixture, the mass ratio of the fluorescent powder A to the fluorescent powder B to the fluorescent powder C is (12 to 75): (18 to 80): (3 to 35);
in the second mixture, the mass ratio of the fluorescent powder D to the fluorescent powder E to the fluorescent powder F is (22-110): (12 to 85): (3 to 95);
specifically, in example 21 group to example 24 group, the first mixture includes phosphor A2, phosphor B3, and phosphor C2; the phosphor B3 is BaSi with the luminescent wavelength of 535nm 2 O 2 N 2 The phosphor A2 and the phosphor C2 are the same as the phosphor A2 and the phosphor C2 in example 1.
The second mixture includes phosphor D, phosphor E, and phosphor F. Phosphor D, phosphor E, and phosphor F were the same as phosphor D, phosphor E, and phosphor F of example A1.
In particular, in the group of embodiment 21, the encapsulating member comprises two light emitting assemblies, which are not shown in the figure, each of the light emitting assemblies comprises a light emitting unit, and as shown in fig. 7 and fig. 8 in particular, a protective film layer 9 is preferably laid on top of the fifth fluorescent layer 8. The total mass ratio of the phosphors in each phosphor layer was 65%, the thickness of each phosphor layer was 0.2mm, the phosphor ratio was as shown in table 2, and the spectrum of the obtained near natural light was as shown in fig. 9.
In example 22, the total mass ratio of the phosphors in each phosphor layer was 70%, the thickness of each phosphor layer was 0.2mm, the phosphor ratio was as shown in table 2, and the spectrum of the obtained near-natural light was as shown in fig. 10.
In example 23, the total mass ratio of the phosphors in each phosphor layer was 70%, the thickness of each phosphor layer was 0.25mm, the phosphor ratio was as shown in table 2, and the spectrum of the obtained near-natural light was as shown in fig. 11.
In example 24, the total mass ratio of the phosphors in each phosphor layer was 70%, the thickness of each phosphor layer was 0.25mm, the phosphor ratios are shown in table 2, and the spectrum of the near natural light obtained is shown in fig. 12.
TABLE 2
From the spectrograms obtained from the groups 21 to 24 of the embodiment, the light emitted by the panchromatic bionic light-emitting unit is near natural light with the wavelength ranging from 400 nm to 700nm, and the absolute spectral power of the wave band from 640nm to 700nm in the near natural light is more than 0.7.
Example 3
A near-natural light LED packaging component comprises at least one light emitting assembly and an electric connector electrically connected with the light emitting assembly, wherein the light emitting assembly comprises at least two first light emitting units. In this embodiment, two, three, four or more light emitting units may be disposed in the same light emitting assembly, and different light emitting units generally have a certain interval therebetween, or may not have an interval therebetween, which may specifically be determined according to a light emitting effect. When different luminescence units set up at intervals, the luminous efficiency of general light source is higher, and the interval between the different luminescence units this moment can be the same or different, specifically can set for according to the light-emitting effect of light source.
The first light-emitting unit comprises a front-mounted blue light chip 2 and two or three phosphor layers formed by sequentially dispensing on the front-mounted blue light chip 2 from bottom to top, light emitted by all the first light-emitting units in the same light-emitting assembly can be mixed to form near natural light with the wavelength of 400-700nm, and the absolute spectral power of 640-700nm waveband in the near natural light is more than 0.7.
Specifically, the difference between the peak wavelengths of at least two of the forward blue chips 2 in the same light emitting assembly is more than 5nm, and the distance between the wavelength bands of two first light emitting units in adjacent wavelength bands in the same light emitting assembly is not more than 10nm. Compared with the forward blue chip 2 with the same peak wavelength, the absolute spectral power of the blue light can be effectively improved, the problem of low blue light existing in near-natural light research for a long time is solved, the quasi-natural light is closer to real natural light, and the color rendering index is further improved. Preferably, the peak wavelengths of all the forward blue light chips 2 in the same light emitting assembly are different, and the peak wavelength interval between any two forward blue light chips 2 is more than 5nm.
Specifically, the light emitting assembly includes at least two first light emitting units, and the at least two first light emitting units may include the full-color bionic light emitting unit disclosed in the present application, or may not include the full-color bionic light emitting unit.
Specifically, when the at least two first light-emitting units do not comprise a full-color bionic light-emitting unit, the light emitted by the at least two first light-emitting units can be mixed to form near natural light in a range of 400-700nm, and the absolute spectral power of a waveband from 640 to 700nm in the near natural light is greater than 0.7.
Example 3-1, there is provided a near natural light LED package member including at least one light emitting element and an electrical connection member electrically connected to the light emitting element; the light-emitting assembly comprises a support 1, a groove 11 is formed in the middle of the support 1, the inner wall of the groove inclines towards the middle, and two first light-emitting units are arranged in the groove 11. A dam 3 is arranged between the two first light-emitting units; the specific structure is shown in fig. 13, and the two light-emitting units arranged side by side are the full-color bionic light-emitting units of the embodiment 11 group and the embodiment 21 group respectively. As shown in FIG. 14, the two panchromatic bionic light sources in the group of the embodiment 3-1 can be mixed to form near-natural light with the wavelength of 400-700nm, and the absolute spectral power of the wave band from 640 to 700nm in the near-natural light is more than 0.7.
Example 3-2, there is provided a near natural light LED package member including at least one light emitting element and an electrical connector electrically connected to the light emitting element; the light-emitting assembly comprises a support 1, a groove 11 is formed in the middle of the support 1, the inner wall of the groove inclines towards the middle, and three first light-emitting units are arranged in the groove 11. A dam 3 is arranged among the three first light-emitting units; the specific structure is shown in fig. 15, where one light-emitting unit in the front row is the full-color bionic light source provided in embodiment 11, and two light-emitting units, namely a white light group and a red light group, are arranged in parallel at intervals in the lower row. The white light group comprises a forward blue light chip 2 and two or three fluorescent powder layers formed by sequentially dispensing on the forward blue light chip 2 from bottom to top, the light source color rendering index of the white light group is larger than 90, the peak value of a red light spectrum is 630nm to 640nm, or the light power distribution of the red light spectrum is more than 630nm to 640nm is in a descending trend, and particularly the light power distribution of the red light spectrum is seriously lower than 650nm to 700nm.
The red light group comprises a positively-mounted blue light chip 2 and two fluorescent powder layers or three fluorescent powder layers which are formed by sequentially dispensing on the positively-mounted blue light chip 2 from bottom to top. In the red light group light source, for the white light group light source, there is insufficient (or missing) power distribution of red light and the red light source with corresponding wavelength is selected. FIG. 16 is a graph showing the emission spectra of the light-emitting units of the white light group; FIG. 17 is a graph of the spectrum of light emitted by a red group of light-emitting units; FIG. 18 is a diagram illustrating that three light-emitting units in example 3-2 can be mixed to form near-natural light with a wavelength of 400-700nm, and the absolute spectral power of the wavelength range from 640 to 700nm in the near-natural light is greater than 0.7.
Group of embodiments 3 to 3, there is provided a near natural light LED package member, the light emitting assembly including three first light emitting units. One light emitting unit in the front row is a color light group light source, and two light emitting units in the lower row are arranged in parallel at intervals and are respectively a white light group and a red light group. The white light group comprises a forward blue light chip 2 and two or three fluorescent powder layers formed by sequentially dispensing on the forward blue light chip 2 from bottom to top, the light source color rendering index of the white light group is larger than 90, the peak value of a red light spectrum is 630nm to 640nm, or the light power distribution of the red light spectrum is more than 630nm to 640nm is in a descending trend, and particularly the light power distribution of the red light spectrum is seriously lower than 650nm to 700nm. The red light group comprises a positively-mounted blue light chip 2 and two fluorescent powder layers or three fluorescent powder layers which are formed by sequentially dispensing on the positively-mounted blue light chip 2 from bottom to top. In the red light group light source, for the white light group light source, compared with the natural spectrum with the same color temperature, the red light source with corresponding wavelength is selected when the power distribution of the red light is insufficient (or missing part) exists, the color light group light source is a cyan light source or an RGB (red, green and blue) light source, and the color light source is used for supplementing the cyan light spectrum in the white light source.
The arrangement of the light emitting cells of example 3-1 group-example 3-3 group is shown in table 3.
TABLE 3
FIG. 19 is a graph showing the emission spectra of the light-emitting units of the color light group; FIG. 20 is a graph of the emission spectra of the light emitting elements of the white light group; FIG. 21 is a graph of the emission spectra of the light-emitting units of the red group; FIG. 22 shows that three light-emitting units in example 3-3 can be mixed to form near-natural light with a wavelength of 400-700nm, and the absolute spectral power of the wavelength range from 640 to 700nm in the near-natural light is greater than 0.7.
Example 4
Embodiment 4 provides a method for packaging a near-natural-light LED package member according to embodiments 1 and 2 and 3, specifically including the steps of:
and 3, sequentially dispensing on the surface of the positively-mounted blue light chip 2 from bottom to top to form two fluorescent powder layers or three fluorescent powder layers.
In some embodiments, the blue light chip packaging structure further comprises a dam 3 which is arranged on the support 1 and is circumferentially arranged on the outer side of the blue light chip 2. The box dam 3 can be installed in advance when the bracket 1 is prepared, or can be installed after the blue light chip 2 is installed.
In some embodiments, a lighting device comprises the near-natural LED light source of embodiment 1 or embodiment 2.
By the aforesaid, just adorning blue light chip 2 for just adorning the chip of form in the nearly nature LED light source of this application, light directly upwards launches, need not pass through the reflection, can increase LED light source light parameter efficiency and luminance, and this application is just adorning LED chip surface point and is glued and form two-layer at least phosphor powder layer, can reduce the equipment requirement, reduces the technology degree of difficulty. Researches show that one layer of dispensing fluorescent powder layer can not emit near-natural light, the application obtains that the light emitted by the full-color bionic light-emitting unit is the near-natural light with the wavelength within the range of 400-700nm through the design of at least two layers of dispensing fluorescent powder layers, the absolute spectral power of the wave band from 650 to 700nm in the near-natural light is larger than 0.75, the spectrum strengthens the red light spectrum in the spectrum of the LED light source and weakens the blue light spectrum, and therefore the formed near-natural spectrum has very important significance for reducing eye fatigue and preventing myopia.
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 (14)
1. The near-natural-light LED packaging member is characterized by comprising at least one light-emitting component, wherein the light-emitting components are electrically connected through an electric connector, the light-emitting component comprises a full-color bionic light-emitting unit, the full-color bionic light-emitting unit comprises a normally-installed blue light chip and at least two layers of fluorescent powder layers sequentially formed on the normally-installed blue light chip in a dispensing mode from bottom to top, light emitted by the full-color bionic light-emitting unit is near-natural light with the wavelength within the range of 400-700nm, and the absolute spectral power of 640-700nm waveband in the near-natural light is larger than 0.7.
2. The near natural light LED package member of claim 1, wherein 2 to 3 phosphor layers are sequentially dispensed on the front-mounted blue light LED chip from bottom to top.
3. The near-natural-light LED package member of claim 2, wherein when the full-color bionic light emitting unit includes three phosphor layers, a first phosphor layer, a second phosphor layer, and a third phosphor layer are sequentially disposed along the front-mounted blue light chip from bottom to top; the first fluorescent powder layer comprises first fluorescent powder, the second fluorescent powder layer comprises second fluorescent powder, and the third fluorescent powder layer comprises third fluorescent powder;
the light-emitting wavelength of the first fluorescent powder is 480 nm-500 nm;
the light-emitting wavelength of the second fluorescent powder is more than 500nm and less than 620nm;
the light-emitting wavelength of the third fluorescent powder is greater than or equal to 620nm;
the mass ratio of the first fluorescent powder to the second fluorescent powder to the third fluorescent powder is (17-67): (18 to 65): (15 to 65).
4. The near natural light LED package member according to claim 3,
the first fluorescent powder comprises fluorescent powder A; the light-emitting wavelength of the fluorescent powder A is 488 to 492nm;
the second fluorescent powder comprises fluorescent powder B, and the luminous wavelength of the fluorescent powder B is 523-542nm;
the third fluorescent powder comprises fluorescent powder C, fluorescent powder D, fluorescent powder E and fluorescent powder F, the luminous wavelength of the fluorescent powder C is 628-681 nm, the luminous wavelength of the fluorescent powder D is 718-722nm, the luminous wavelength of the fluorescent powder E is 738-742nm, and the luminous wavelength of the fluorescent powder F is 793-797 nm.
5. The near natural light LED package member according to claim 4,
the fluorescent powder B in the second fluorescent powder comprises fluorescent powder B1 and fluorescent powder B2, the luminous wavelength of the fluorescent powder B1 is 523-527nm, the luminous wavelength of the fluorescent powder B2 is 538-542nm, and the mass ratio of the fluorescent powder B1 to the fluorescent powder B2 is (22-80): (13 to 82);
the fluorescent powder C in the third fluorescent powder comprises fluorescent powder C1, fluorescent powder C2 and fluorescent powder C3, the luminous wavelength of the fluorescent powder C1 is 628-632nm, the luminous wavelength of the fluorescent powder C2 is 658-662nm, the luminous wavelength of the fluorescent powder C3 is 677-681nm, and the mass ratio of the fluorescent powder C1, the fluorescent powder C2, the fluorescent powder C3, the fluorescent powder D, the fluorescent powder E and the fluorescent powder F is (5-30): (4 to 40) (5 to 57): (10 to 85): (10 to 55): (3 to 65).
6. The near-natural-light LED packaging component of claim 4, wherein when the full-color bionic light-emitting unit comprises two phosphor layers, a fourth phosphor layer and a fifth phosphor layer are arranged along the front-mounted blue-light chip from bottom to top in sequence;
the fourth phosphor layer comprises a first mixture; the fifth phosphor layer includes a second mixture;
the fluorescent powder C in the third fluorescent powder, the first fluorescent powder and the second fluorescent powder form a first mixture;
the phosphor D, the phosphor E and the phosphor F in the third phosphor form a second mixture,
in the first mixture, the mass ratio of the fluorescent powder A to the fluorescent powder B to the fluorescent powder C is (12 to 75): (18 to 80): (3 to 35);
in the second mixture, the mass ratio of the fluorescent powder D to the fluorescent powder E to the fluorescent powder F is (22-110): (12 to 85): (3 to 95).
7. The near natural light LED package member of any one of claims 1 to 6, wherein the thickness of each phosphor layer is 0.25mm or less.
8. The near-natural-light LED packaging member is characterized by comprising at least one light-emitting assembly, wherein the light-emitting assemblies are electrically connected through an electric connector, the light-emitting assembly comprises at least two first light-emitting units, each first light-emitting unit comprises a forward blue light chip and at least two layers of fluorescent powder layers sequentially formed on the forward blue light chip in a dispensing mode from bottom to top, light emitted by all the first light-emitting units in the same light-emitting assembly can be mixed to form near-natural light with the wavelength of 400-700nm, and the absolute spectral power of the wavelength bands from 640 to 700nm in the near-natural light is larger than 0.7.
9. The near natural light LED package member of claim 8, wherein at least one of all the first light emitting units in the same light emitting assembly is a full color bionic light emitting unit.
10. The near-natural-light LED package member according to claim 8, wherein peak wavelengths of at least two forward-mounted blue chips in the same light emitting module are different by 5nm or more, and a wavelength band interval between two first light emitting units in adjacent wavelength bands in the same light emitting module is not more than 10nm.
11. The near natural light LED package member according to claim 10, wherein peak wavelengths of all the forward-mounted blue light chips in the same light emitting module are different from each other, and a peak wavelength interval between any two forward-mounted blue light chips is 5nm or more.
12. The method for encapsulating near-natural-light LED package members according to claim 1 or 8, comprising the steps of, step 1, fixing the forward blue-light-emitting chips in all the light-emitting components on a support;
step 2, electrically connecting the forward blue light chips and the bracket by using an electric connecting piece;
and 3, sequentially dispensing on the surface of the positively-mounted blue light chip from bottom to top to form at least two layers of fluorescent powder layers.
13. The method of claim 12, further comprising circumferentially mounting a dam on the outer side of the blue LED chip being packaged on the support.
14. A lighting device comprising the near natural light LED package member according to claim 1 or 8.
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