CN114864564A - Mixed full-spectrum eye-protecting healthy LED light source - Google Patents
Mixed full-spectrum eye-protecting healthy LED light source Download PDFInfo
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- CN114864564A CN114864564A CN202210403106.0A CN202210403106A CN114864564A CN 114864564 A CN114864564 A CN 114864564A CN 202210403106 A CN202210403106 A CN 202210403106A CN 114864564 A CN114864564 A CN 114864564A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
Abstract
The invention relates to the technical field of LED light sources, in particular to a mixed full-spectrum eye-protecting healthy LED light source which comprises a PCB (printed circuit board), white light lamp beads and red light lamp beads, wherein the white light lamp beads and the red light lamp beads are arranged on the PCB according to the quantity ratio calculated by spectral energy distribution; the white light lamp bead comprises at least two blue light chips for emitting blue light with different wavelengths and fluorescent glue for packaging the blue light chips, the fluorescent glue comprises packaging glue and at least three kinds of fluorescent powder with different wave bands, the fluorescent powder is mixed in the packaging glue and is used for being matched with the blue light chips to generate white light, and the red light lamp bead comprises at least one red light chip for emitting red light; according to the LED light source provided by the invention, low blue light and spectrum continuous full-spectrum white light generated by the double blue light chips of the white light lamp beads are utilized, and the half-wave width generated by the red light lamp beads is narrow, and the spectrum energy is easy to control, so that the finally formed mixed light has the beneficial effects of improving eyesight, promoting blood microcirculation of human bodies and the like.
Description
Technical Field
The invention relates to the technical field of LED light sources, in particular to a hybrid full-spectrum eye-protecting healthy LED light source.
Background
With the popularization of LED lamps, the conventional LED lamps pay attention to parameters such as luminous efficiency, color rendering index and color temperature, and the influence of light on human health, especially the influence of high-energy blue light on human eyes is neglected.
Disclosure of Invention
To overcome the problems of the prior art, the task of the present invention is to provide a hybrid full spectrum eye-protecting healthy LED light source.
The task of the invention is realized by the following technical scheme:
a mixed full-spectrum eye-protecting healthy LED light source comprises a PCB board, white light beads and red light beads, wherein the white light beads and the red light beads are arranged on the PCB board according to the quantity ratio calculated by spectral energy distribution; the white light lamp bead comprises at least two blue light chips for emitting blue light with different wavelengths and fluorescent glue for packaging the blue light chips, the blue light chips are electrically connected in parallel, and the fluorescent glue comprises packaging glue and at least three kinds of fluorescent powder which are mixed in the packaging glue and used for being matched with the blue light chips to generate white light; the red light bead comprises at least one red light chip for emitting red light, and the wavelength range of the red light emitted by the red light bead is 650-720 nm.
The technical solution is further explained below:
in some embodiments, the ratio of the number of the white light beads to the number of the red light beads ranges from 5:1 to 18:1, and the ratio of the radiant flux ranges from 10:1 to 36: 1.
In some embodiments, the white light bead includes two blue light chips, which are a first blue light chip with a peak wavelength range of 450-.
In some embodiments, the difference between the forward operating voltages of the first blue chip and the second blue chip is less than or equal to 5%, and the peak intensity ratio of the first blue chip and the second blue chip under the same operating condition is (1-1.2): (0.8-1).
In some embodiments, the fluorescent glue includes three kinds of the phosphors, which are respectively the first green phosphor with a peak wavelength range of 510-515nm, the second green phosphor with a peak wavelength range of 500-540nm, and the red phosphor with a peak wavelength range of 650-660 nm.
In some embodiments, the first green phosphor and the second green phosphor are both aluminate system phosphors, and the red phosphor is a carbonitride system phosphor.
In some embodiments, the first green phosphor has a formula of Lu3Al5O12: Ce, the second green phosphor has a formula of (Y, Lu)3Al5O12: Ce, and the red phosphor has a formula of Sr0.876La0.1LiAl2.1Ge0.9N3.5C (0.01Eu,0.01Ce,0.004 Tb).
In some embodiments, the weight percentage of the first green phosphor is 5% to 10%, the weight percentage of the second green phosphor is 82% to 90%, and the weight percentage of the red phosphor is 3% to 10%, based on 100% of the total weight of the phosphors.
In some embodiments, the red light chip is a quaternary red light chip, the red light bead further comprises a PLCC support, the red light chip is fixed on the PLCC support through silver colloid, an electrode of the red light chip is connected with an electrode frame of the PLCC support through a bonding wire, the PLCC support is filled with silicone resin, and the red light bead is formed after curing.
In some embodiments, a lamp bead pad is arranged on the PCB, solder paste is printed on the lamp bead pad, and the white light lamp bead and the red light lamp bead are soldered on the lamp bead pad by reflow soldering; the two ends of the PCB are provided with connecting positions for connecting the PCB boards with each other or connecting a driving power supply.
In some embodiments, the PCB comprises an aluminum plate, a heat conducting insulating layer is disposed on the surface of the aluminum plate, the heat conducting insulating layer is covered with a copper layer circuit, and the uppermost layer is sprayed with reflective ink.
According to the mixed full-spectrum eye-protecting healthy LED light source provided by the technical scheme, the white light lamp beads and the red light lamp beads are arranged on the PCB according to spectral energy distribution, low blue light and spectrum continuous full-spectrum white light generated by double blue light chips of the white light lamp beads are utilized, the half-wave width generated by the red light lamp beads is matched with red light easy to control spectral energy, and finally formed mixed light has the beneficial effects of improving eyesight, promoting blood microcirculation of a human body and the like.
The conception, specific structure and effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the objects, features and effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a hybrid full spectrum eye-protecting healthy LED light source according to an embodiment;
FIG. 2 is a spectrum diagram of a white light bead in the example;
FIG. 3 is a spectrum of a red light bead in the example;
FIG. 4 is a spectrum diagram of mixed light in the example.
The LED lamp comprises a PCB (printed circuit board) 1, a lamp bead bonding pad 11, solder paste 12, a connecting position 13, a white light lamp bead 2 and a red light lamp bead 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the description of the specific embodiments is intended to be illustrative of the invention and is not intended to limit the invention. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through intervening elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Furthermore, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, and the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
As shown in fig. 1, a hybrid full-spectrum eye-protecting healthy LED light source comprises a PCB board 1, white light beads 2 and red light beads 3, wherein the white light beads 2 and the red light beads 3 are installed on the PCB board 1 according to the quantity ratio calculated by the spectral energy distribution, and preferably, the white light beads 2 and the red light beads 3 are installed in a ratio of 5:1 to 18:1 is arranged on the PCB board, and the ratio of the radiation flux of the PCB board to the radiation flux of the PCB board is 10:1 to 36: 1; the white light bead 2 comprises at least two blue light chips for emitting blue light with different wavelengths and fluorescent glue (not shown in the attached drawings) for packaging the plurality of blue light chips, each blue light chip is electrically connected in parallel, and the fluorescent glue comprises packaging glue and at least three kinds of fluorescent powder which are mixed in the packaging glue and used for being matched with the plurality of blue light chips to generate white light; the red light bead 3 comprises at least one red light chip for emitting red light, and the wavelength range of the red light emitted by the red light bead 3 is 650-720 nm.
The mixed full-spectrum eye-protecting healthy LED light source provided by the embodiment is characterized in that the white light bead 2 and the red light bead 3 are simultaneously arranged on the PCB 1, wherein the white light bead 2 adopts a double blue light chip to match with fluorescent powder of at least three different wave bands, so that full-spectrum white light with low blue light and continuous spectrum can be generated, the spectrum of the full-spectrum white light at the color temperature of 4000K +/-200K is shown in figure 2, the spectrum continuity is better and is closer to natural light, the blue light with the wavelength of about 450nm is lower, the damage of the blue light with the wavelength to human eyes can be greatly reduced, the eyesight is protected, the cyan light with the wavelength of 470 and 480nm is higher, the melatonin secretion of a human body can be influenced, and the human body is better; the red light bead 3 adopts a red light chip, can generate red light with a wavelength range of 650 plus 720nm, has the characteristics of narrow half-wave width and easy control of spectral energy under the color temperature of 4000K +/-200K, is shown in figure 3, has the effect of promoting the blood microcirculation of a human body, and is characterized in that the quantity of the white light bead 2 and the red light bead 3 is configured according to the quantity proportion range of 5:1 to 18:1 by considering the spectral energy distribution of the white light bead 2 and the red light bead 3, so that the radiation flux proportion range of the white light bead 2 and the red light bead 3 is 10:1 to 36:1, the white light bead 2 and the red light bead 3 are matched to generate mixed light, the mixed spectrum of the mixed light is shown in figure 4, the advantages of the white light and the red light are integrated, and the red light chip has the beneficial effects of improving the eyesight, promoting the blood microcirculation of the human body and the like.
In some embodiments, the white light bead 2 includes two blue light chips, which are a first blue light chip with a peak wavelength range of 460nm and a second blue light chip with a peak wavelength range of 460nm and 470nm, respectively. According to the contribution of the relative distribution power of the spectrum to the color rendering index, the continuity of the spectrum in a blue light region and the relative intensity ratio are the key points for obtaining the high color rendering index, in the embodiment of the invention, when the wavelength of a short-wave blue light chip, namely a first blue light chip, is too short, red fluorescent powder with the same wavelength is adopted for matching, the color rendering index is relatively low, and if the color rendering index of the device is improved by the green fluorescent powder and the red fluorescent powder, the light effect of the device can be greatly reduced; when the first blue light chip wave band is too long, the photoelectric conversion efficiency of the chip is reduced, in addition, a defect can be caused in a blue light short wave region, and the spectrum display index is difficult to realize more than 98. The embodiment of the invention selects the wavelength of the first blue light chip to be located at 450-460nm on the basis of sufficient experiments. The spectrum of the second blue light chip is coupled with the spectrum of the first blue light chip and the spectrum of the fluorescent powder, so that the spectrums are continuous, gaps between the spectrums are reduced, and the color rendering index of the second blue light chip can be close to about 100, so that the wavelength selection of the spectrum of the second blue light chip plays a crucial role in obtaining high-color-rendering index, particularly R12, and if the wavelength of the second blue light chip is too short or too long, the gaps between the spectrums are large, and the improvement of Ri (R1-R15) index is difficult to balance. The embodiment of the invention selects the peak wavelength of the second blue light chip to be positioned at 460-470nm based on the experimental basic data.
In some embodiments, the difference between the forward operating voltages of the first blue chip and the second blue chip is less than or equal to 5%, and the peak intensity ratio of the first blue chip and the second blue chip under the same operating condition is (1-1.2): (0.8-1). The color rendering index is not only related to the spectrum wavelength, but also depends on the relative intensity distribution between the spectrums to a great extent, when the spectrum intensity ratio of the first blue light chip and the second blue light chip is too low, the color rendering index Ri has an insufficiently obvious response to the spectrums, and the CRI is more than 98 and the Ri is more than 95 are difficult to realize; if the spectral intensity ratio of the first blue light chip to the second blue light chip is too high, the spectrum in the blue light region is difficult to simulate the sunlight spectrum, and some special indicators such as R12 are difficult to regulate and control and difficult to realize more than 90, so that the spectral intensity ratio of the first blue light chip to the second blue light chip selected by the embodiment of the invention is (1-1.2): (0.8-1). Meanwhile, on the basis of the reliability of the packaged device, the forward working voltages of the first blue light chip and the second blue light chip are limited, if the voltage difference between the first blue light chip and the second blue light chip is too large, the current distribution is not uniform after the first blue light chip and the second blue light chip are connected in parallel, and the color drift, the color rendering index, the stability and the like of the device are poor, and the embodiment of the invention obtains that when the voltage difference between the two chips is less than or equal to 5%, the influence of the performance parameters of the device along with the change of the temperature and the humidity is small; on the contrary, the stability of the device is poor.
In some embodiments, the fluorescent glue includes three kinds of the phosphors, which are respectively the first green phosphor with a peak wavelength range of 510-515nm, the second green phosphor with a peak wavelength range of 500-540nm, and the red phosphor with a peak wavelength range of 650-660 nm. For the formula of the fluorescent powder, the first green fluorescent powder with the peak wavelength of 510-514nm, the second green fluorescent powder with the peak wavelength of 532-537nm and the red fluorescent powder with the peak wavelength of 652-658nm are selected. Firstly, the invention adopts the first green fluorescent powder with the peak wavelength of 510-; according to the half-peak width and the light-emitting spectral characteristics of the first green phosphor, the wavelength of the first green phosphor is selected to be 510-514nm, if the wavelength is too short, the excitation efficiency of the phosphor is too low, if the wavelength is too long, the gully at the junction of the blue light and the green light region is obvious, and the spectral characteristics and the color rendering index are difficult to meet the requirements. After the chip and the first green phosphor are determined, the peak wavelength and the spectral characteristic of the red phosphor are preferably selected, and the peak wavelength of the red phosphor is selected to be located at 652-ion 658nm from the aspects of display and luminous efficiency. Considering the half-peak widths of the first green phosphor and the red phosphor and the requirements of spectrum coupling performance, if the visible light is really similar to the solar spectrum, the second green phosphor needs to be provided to realize spectrum continuity and reduce the gap through spectrum coupling, and from the light effect and the apparent finger change effect after the spectrum coupling, the peak wavelength selected by the second green phosphor is 532-537nm, and if the wavelength is too long or too short, the gap between the spectra is large, so that the high apparent finger is difficult to realize. When the three types of fluorescent powder are adopted to realize the solar spectrum of the LED light source, the approximate weight of the fluorescent powder accounts for the ratio, so that the color tolerance range is smaller after the fluorescent powder is packaged into a device. Therefore, the spectrum of the full-spectrum LED light source provided by the embodiment of the invention is closer to the solar spectrum through the synergistic effect between the special blue light chip and the fluorescent powder.
In some embodiments, the first green phosphor and the second green phosphor are both aluminate system phosphors, and the red phosphor is a carbonitride system phosphor. The green fluorescent powder of the aluminate system has better stability; preferably, the chemical formula of the first green phosphor is Lu3Al5O12: Ce. The chemical formula of the second green fluorescent powder is (Y, Lu)3Al5O12: Ce. Further, the chemical formula of the red phosphor is preferably Sr0.876La0.1LiAl2.1Ge0.9N3.5C (0.01Eu,0.01Ce,0.004 Tb). The red fluorescent powder has the same structure with SrLiAl 3N 4, and has higher external quantum efficiency and thermal stability than (Ca, Sr) AlSiN 3: Eu.
In some embodiments, the weight percentage of the first green phosphor is 5% to 10%, the weight percentage of the second green phosphor is 82% to 90%, and the weight percentage of the red phosphor is 3% to 10%, based on 100% of the total weight of the phosphors. When the three types of fluorescent powder are adopted to realize the solar spectrum of the LED light source, the approximate weight of the fluorescent powder accounts for the ratio, so that the color tolerance range is smaller after the fluorescent powder is packaged into a device.
In some embodiments, the red light chip is made of a quaternary red light chip, the wavelength includes 650-720nm, and the red light chip has the characteristics of narrow half-wave width and easily controlled spectral energy, and the specific structure of the red light bead 3 is as follows: fixing the red light chip on the PLCC support by adopting silver adhesive, connecting an electrode frame of the PLCC support and an electrode of the red light chip by adopting a bonding wire, filling the PLCC support by adopting silicon resin, and forming a complete red light lamp bead 3 after curing.
In some embodiments, the PCB board 1 is provided with a lamp bead pad 11, the lamp bead pad 11 is printed with high thermal conductivity solder paste 12, and the white light lamp beads 2 and the red light lamp beads 3 are welded on the lamp bead pad 11 by reflow soldering, so that the functions of fixing the lamp beads, conducting electricity and conducting heat can be achieved; the both ends of PCB board 1 all are provided with connection position 13 for interconnect between a plurality of PCB boards 1 or connect drive power supply, this design makes the lamp plate that forms can install different numbers of lamp plates according to the demand of lamps and lanterns, reaches the requirement that satisfies lamps and lanterns to optical parameter and electrical parameter.
In some embodiments, the PCB board 1 includes an aluminum plate, the surface of the aluminum plate is provided with a high thermal conductive insulating layer, the high thermal conductive insulating layer is covered with a copper layer circuit, and the uppermost layer is sprayed with high reflective ink (not shown in the drawings).
Based on the research on human eyes and the influence of spectrum on human health, the invention adopts low-intensity double blue light to excite white LED lamp beads of aluminate and nitride, and then prepares red LED lamp beads capable of promoting human blood microcirculation according to the spectrum energy distribution proportion, and finally forms life health spectrum capable of improving eyesight and adjusting human microcirculation.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A mixed full-spectrum eye-protecting healthy LED light source is characterized by comprising a PCB board, white light beads and red light beads, wherein the white light beads and the red light beads are arranged on the PCB board according to the quantity ratio calculated by spectral energy distribution;
the white light lamp bead comprises at least two blue light chips for emitting blue light with different wavelengths and fluorescent glue for packaging the blue light chips, the blue light chips are electrically connected in parallel, and the fluorescent glue comprises packaging glue and at least three kinds of fluorescent powder which are mixed in the packaging glue and used for being matched with the blue light chips to generate white light;
the red light bead comprises at least one red light chip for emitting red light, and the wavelength range of the red light emitted by the red light bead is 650-720 nm.
2. The hybrid full-spectrum eye-protecting healthy LED light source as claimed in claim 1, wherein the number ratio of the white light beads to the red light beads ranges from 5:1 to 18:1, and the ratio of the radiant flux ranges from 10:1 to 36: 1.
3. The hybrid full-spectrum eye-protecting healthy LED light source as claimed in claim 1, wherein the white light bead comprises two blue light chips, namely a first blue light chip with a peak wavelength range of 450-470 nm and a second blue light chip with a peak wavelength range of 460-470 nm.
4. The hybrid full-spectrum eye-protecting healthy LED light source according to claim 3, wherein the difference in forward operating voltage between the first blue chip and the second blue chip is less than or equal to 5%, and the peak intensity ratio of the first blue chip and the second blue chip under the same operating condition is (1-1.2): (0.8-1).
5. The hybrid full-spectrum eye-protecting healthy LED light source as claimed in claim 1, wherein the fluorescent glue comprises three kinds of the fluorescent powders, namely a first green fluorescent powder with a peak wavelength range of 510-515nm, a second green fluorescent powder with a peak wavelength range of 500-540nm, and a red fluorescent powder with a peak wavelength range of 650-660nm, and the mixed full-spectrum eye-protecting healthy LED light source comprises, based on 100% of the total weight of the fluorescent powders, 5-10% of the first green fluorescent powder by mass, 82-90% of the second green fluorescent powder by mass, and 3-10% of the red fluorescent powder by mass.
6. The hybrid full-spectrum eye-protecting healthy LED light source according to claim 5, wherein the first green phosphor and the second green phosphor are both aluminate system phosphors, and the red phosphor is a carbonitride system phosphor.
7. The hybrid full-spectrum eye-protecting healthy LED light source according to claim 6, wherein the first green phosphor has a chemical formula of Lu3Al5O12: Ce, the second green phosphor has a chemical formula of (Y, Lu)3Al5O12: Ce, and the red phosphor has a chemical formula of Sr0.876La0.1LiAl2.1Ge0.9N3.5C (0.01Eu,0.01Ce,0.004 Tb).
8. The hybrid full-spectrum eye-protecting healthy LED light source according to claim 1, wherein the red light chip is a four-element red light chip, the red light bead further comprises a PLCC support, the red light chip is fixed on the PLCC support through silver paste, an electrode of the red light chip is connected with an electrode holder of the PLCC support through a bonding wire, the PLCC support is filled with silicone, and the red light bead is formed after curing.
9. The hybrid full-spectrum eye-protecting healthy LED light source as claimed in claim 1, wherein a lamp bead pad is disposed on the PCB, solder paste is printed on the lamp bead pad, and the white light lamp bead and the red light lamp bead are soldered on the lamp bead pad by reflow soldering; the two ends of the PCB are provided with connecting positions for connecting the PCB boards with each other or connecting a driving power supply.
10. The hybrid full spectrum eye-protecting healthy LED light source according to claim 1, wherein the PCB comprises an aluminum plate, a heat conducting insulating layer is disposed on the surface of the aluminum plate, a copper layer circuit is disposed on the heat conducting insulating layer, and a reflective ink layer is sprayed on the uppermost layer.
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| CN202210403106.0A CN114864564A (en) | 2022-04-15 | 2022-04-15 | Mixed full-spectrum eye-protecting healthy LED light source |
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| CN202210403106.0A CN114864564A (en) | 2022-04-15 | 2022-04-15 | Mixed full-spectrum eye-protecting healthy LED light source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116451091A (en) * | 2023-04-12 | 2023-07-18 | 深圳市帝狼光电有限公司 | Processing method for improving spectrum similarity of lamp and lamp |
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2022
- 2022-04-15 CN CN202210403106.0A patent/CN114864564A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116451091A (en) * | 2023-04-12 | 2023-07-18 | 深圳市帝狼光电有限公司 | Processing method for improving spectrum similarity of lamp and lamp |
| CN116451091B (en) * | 2023-04-12 | 2024-02-09 | 深圳市帝狼光电有限公司 | Processing method for improving spectrum similarity of lamp and lamp |
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