A hybrid full-spectrum eye-protection and health LED light source

Abstract

The present invention relates to the technical field of LED light sources, and specifically to a hybrid full-spectrum eye-protection and health LED light source, comprising a PCB board, white light lamp beads and red light lamp beads, wherein the white light lamp beads and the red light lamp beads are mounted on the PCB board according to a quantity ratio calculated by spectral energy distribution; the white light lamp beads comprise at least two blue light chips for emitting blue light of different wavelengths and fluorescent glue for encapsulating the blue light chips, the fluorescent glue comprising encapsulating glue and phosphors of at least three different wavelengths mixed in the encapsulating glue and used to cooperate with the blue light chips to produce white light; the red light lamp beads comprise at least one red light chip for emitting red light; the LED light source provided by the present invention utilizes the low blue light, spectrally continuous full-spectrum white light generated by the dual blue light chips of the white light lamp beads, combined with the red light with a narrow half-wave width and easily controllable spectral energy generated by the red light lamp beads, and the resulting mixed light has beneficial effects such as improving vision and promoting human blood microcirculation.

Description

Technical Field

[0001] The present invention relates to the technical field of LED light sources, in particular to a hybrid full-spectrum eye-health-protecting LED light source. Background Art

[0002] With the popularity of LED lamps, conventional LED lamps focus on parameters such as light efficiency, color rendering index, and color temperature, ignoring the impact of light on human health, especially the impact of high-energy blue light on the human eye. Summary of the Invention

[0003] In order to overcome the problems of the prior art, the task of the present invention is to provide a hybrid full-spectrum eye-protection and health LED light source.

[0004] The task of the present invention is achieved through the following technical solutions:

[0005] A hybrid full-spectrum eye-health LED light source includes a PCB board, white light lamp beads, and red light lamp beads. The white light lamp beads and the red light lamp beads are mounted on the PCB board according to the number ratio calculated by spectral energy distribution. The white light lamp beads include at least two blue light chips for emitting blue light of different wavelengths and fluorescent glue for encapsulating multiple blue light chips. The blue light chips are electrically connected in parallel. The fluorescent glue includes encapsulating glue and phosphors of at least three different wavelengths mixed in the encapsulating glue and used to cooperate with the multiple blue light chips to produce white light. The red light lamp beads include at least one red light chip for emitting red light. The wavelength of red light emitted by the red light lamp beads ranges from 650nm to 720nm.

[0006] The technical solution is further described below:

[0007] In some embodiments, the number ratio of the white light lamp beads to the red light lamp beads ranges from 5:1 to 18:1, and the ratio of their radiation fluxes ranges from 10:1 to 36:1.

[0008] In some embodiments, the white light lamp includes two blue light chips, namely a first blue light chip with a peak wavelength range of 450-460 nm and a second blue light chip with a peak wavelength range of 460-470 nm.

[0009] In some embodiments, the forward operating voltage difference between the first blue light chip and the second blue light chip is less than or equal to 5%, and the peak intensity ratio of the first blue light chip and the second blue light chip under the same operating conditions is (1-1.2): (0.8-1).

[0010] In some embodiments, the fluorescent glue includes three types of phosphors, namely a first green phosphor with a peak wavelength range of 510-515 nm, a second green phosphor with a peak wavelength range of 500-540 nm, and a red phosphor with a peak wavelength range of 650-660 nm.

[0011] In some embodiments, the first green phosphor and the second green phosphor are both aluminate-based phosphors, and the red phosphor is a carbonitride-based phosphor.

[0012] In some embodiments, the chemical formula of the first green phosphor is , the chemical formula of the second green phosphor is , the chemical formula of the red phosphor is .

[0013] In some embodiments, based on 100% of the total weight of the phosphor, the mass percentage of the first green phosphor is 5%-10%, the mass percentage of the second green phosphor is 82%-90%, and the mass percentage of the red phosphor is 3%-10%.

[0014] In some embodiments, the red light chip is a four-element red light chip, and the red light lamp bead also includes a PLCC bracket. The red light chip is fixed on the PLCC bracket through silver glue, and the electrodes of the red light chip are connected to the electrode frame of the PLCC bracket through bonding wires. The PLCC bracket is filled with silicone resin and formed after curing to form the red light lamp bead.

[0015] In some embodiments, a lamp bead pad is provided on the PCB board, 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; connection positions are provided at both ends of the PCB board for interconnecting multiple PCB boards or connecting a driving power supply.

[0016] In some embodiments, the PCB board includes an aluminum plate, a thermally conductive insulating layer is provided on the surface of the aluminum plate, a copper layer circuit is covered on the thermally conductive insulating layer, and the top layer is sprayed with reflective ink.

[0017] This technical solution provides a hybrid full-spectrum eye-protection and health LED light source. By configuring white light lamp beads and red light lamp beads on a PCB board according to spectral energy distribution, the dual blue light chips of the white light lamp beads produce low blue light and spectrally continuous full-spectrum white light, combined with the red light beads produce red light with a narrow half-wave width and easily controllable spectral energy. The resulting mixed light has beneficial effects such as improving vision and promoting human blood microcirculation.

[0018] The concept, specific structure and effects of the present invention will be further described below with reference to the accompanying drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a hybrid full-spectrum eye-protection health LED light source in an embodiment;

[0020] Figure 2 This is a spectrum diagram of the white light lamp bead in the embodiment;

[0021] Figure 3 This is the spectrum of the red light bead in the embodiment;

[0022] Figure 4 Spectrum diagram of mixed light in the embodiment.

[0023] Among them, there are PCB board 1, lamp bead pad 11, solder paste 12, connection position 13, white light lamp bead 2, and red light lamp bead 3. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in 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 present invention and are not intended to limit the present invention. It should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "mounted" and "connected" are to be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections via intermediate components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. The terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0025] like Figure 1As shown, a hybrid full-spectrum eye-protection health LED light source includes a PCB board 1, white light lamp beads 2 and red light lamp beads 3. The white light lamp beads 2 and the red light lamp beads 3 are installed on the PCB board 1 according to the number ratio calculated by the spectral energy distribution. Preferably, the white light lamp beads 2 and the red light lamp beads 3 are installed on the PCB board according to the number ratio of 5:1 to 18:1, and the radiation flux ratio between the two ranges from 10:1 to 36:1; the white light lamp beads 2 include at least two blue light chips for emitting blue light of different wavelengths and fluorescent glue for encapsulating multiple blue light chips (not shown in the drawings), and each blue light chip is electrically connected in parallel. The fluorescent glue includes packaging glue and phosphors of at least three different bands mixed in the packaging glue and used to cooperate with multiple blue light chips to produce white light; the red light lamp beads 3 include at least one red light chip for emitting red light, and the wavelength range of red light emitted by the red light lamp beads 3 is 650-720nm.

[0026] This embodiment provides a hybrid full-spectrum eye-health LED light source, which is configured by simultaneously arranging white light beads 2 and red light beads 3 on a PCB board 1. The white light beads 2 use dual blue light chips with at least three different wavelengths of phosphors to produce low-blue light, continuous-spectrum full-spectrum white light. Its spectrum at a color temperature of 4000K±200K is as follows: Figure 2 As shown, the spectrum continuity is good and closer to natural light. The blue light with a wavelength of about 450nm is relatively low, which can greatly reduce the damage caused by the blue light of this wavelength to the human eye and is beneficial to protecting eyesight. The cyan light with a wavelength of 470-480nm is relatively high and can affect the secretion of melatonin in the human body, which is better for the human body. The red light lamp bead 3 uses a red light chip, which can produce red light with a wavelength range of 650-720nm. Its spectrum at a color temperature of 4000K±200K is as follows Figure 3 As shown, it has the characteristics of narrow half-wave width and easy-to-control spectral energy, and has the effect of promoting human blood microcirculation. Taking into account the spectral energy distribution of the white light lamp bead 2 and the red light lamp bead 3, the number of white light lamp bead 2 and the red light lamp bead 3 is configured according to the ratio range of 5:1 to 18:1, so that the radiation flux ratio of the white light lamp bead 2 and the red light lamp bead 3 is in the range of 10:1 to 36:1. The mixed light generated by the combination of the white light lamp bead 2 and the red light lamp bead 3 has a mixed spectrum as shown below. Figure 4 As shown, it integrates the advantages of the above-mentioned white light and red light, and has beneficial effects such as improving vision and promoting human blood microcirculation.

[0027] In some embodiments, the white light lamp bead 2 includes two blue light chips, namely a first blue light chip with a peak wavelength range of 450-460nm and a second blue light chip with a peak wavelength range of 460-470nm. According to the contribution of the relative distribution power of the spectrum to the color rendering index, the continuity of the spectrum in the blue light region and the relative intensity ratio are the key to obtaining a high color rendering index. In the embodiment of the present invention, when the wavelength of the short-wave blue light chip, i.e., the first blue light chip, is too short, the color rendering index is relatively low when a red phosphor of the same wavelength is used. If the color rendering index of the device is improved by green phosphor and red phosphor, the luminous efficiency of the device will be greatly reduced. When the wavelength of the first blue light chip is too long, the chip's photoelectric conversion efficiency is reduced. In addition, it will cause a loss in the short-wave blue light region, making it difficult to achieve a spectral color rendering index greater than 98. Based on sufficient experiments, the embodiment of the present invention selects the first blue light chip with a wavelength of 450-460nm. The long-wavelength blue chip, or the second blue chip, couples its spectrum with the spectrum of the first blue chip and the phosphor spectrum, promoting spectral continuity and reducing spectral gaps, allowing the color rendering index to approach 100. Therefore, the wavelength selection of the second blue chip spectrum plays a crucial role in achieving high CRI, especially improving R12. If the wavelength of the second blue chip is too short or too long, the spectral gap is large, making it difficult to balance the improvement of the Ri (R1-R15) index. Based on experimental data, the present embodiment selects the second blue chip with a peak wavelength of 460-470nm.

[0028] In some embodiments, the difference in forward operating voltage between the first blue light chip and the second blue light chip is less than or equal to 5%, and the peak intensity ratio of the first blue light chip and the second blue light chip under the same operating conditions is (1-1.2):(0.8-1). The color rendering index is not only related to the wavelength of the spectrum, but also largely depends on the relative intensity distribution between the spectra. When the spectral intensity ratio of the first blue light chip and the second blue light chip is too low, the color rendering index Ri does not respond significantly to the spectrum, making it difficult to achieve CRI>98 or Ri>95. If the spectral intensity ratio of the first blue light chip and 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 color rendering indices such as R12 are difficult to control and difficult to achieve greater than 90. Therefore, in this embodiment of the present invention, the spectral intensity ratio of the first blue light chip and the second blue light chip is selected to be (1-1.2):(0.8-1). At the same time, based on the reliability of the packaged device, the embodiment of the present invention limits the forward operating voltage of the first blue light chip and the second blue light chip. If the voltage difference between the first blue light chip and the second blue light chip is too large, the current distribution will be uneven after parallel connection, resulting in deterioration of the device's color drift, color rendering index, and stability performance. The embodiment of the present invention has found through experiments that when the voltage difference between the two chips is less than or equal to 5%, the performance parameters of the device are less affected by changes in temperature and humidity; otherwise, the stability of the device is poor.

[0029] In some embodiments, the fluorescent glue includes three types of phosphors, namely a first green phosphor with a peak wavelength range of 510-515nm, a second green phosphor with a peak wavelength range of 500-540nm, and a red phosphor with a peak wavelength range of 650-660nm. For the formula of the phosphors, a first green phosphor with a peak wavelength of 510-514nm, a second green phosphor with a peak wavelength of 532-537nm, and a red phosphor with a peak wavelength of 652-658nm are selected. First of all, the present invention uses a first green phosphor with a peak wavelength of 510-514nm and a red phosphor with a peak wavelength of 652-658nm to match the chip, which can achieve spectral daylight continuity and improve the color rendering index of the device while ensuring the light efficiency; according to the half-peak width and luminous spectrum 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 groove at the connection between the blue light and green light areas is more obvious, and the spectral characteristics and color rendering index are difficult to meet the requirements. After the chip and the first green phosphor are determined, the peak wavelength and spectral characteristics of the red phosphor are optimized. From the perspective of color rendering index and luminous efficiency performance, the peak wavelength of the red phosphor is selected to be between 652-658nm. Taking into account the half-width at half maximum and spectral coupling performance requirements of the first green phosphor and the red phosphor, if visible light is truly similar to the solar spectrum, a second green phosphor must be provided to achieve spectral continuity and reduce gullies through spectral coupling. From the perspective of the luminous efficiency and color rendering index changes after spectral coupling, the peak wavelength selected for the second green phosphor is 532-537nm. If the wavelength is too long or too short, there will be large gullies between the spectra, making it difficult to achieve a high color rendering index. When these three types of phosphors are used to realize the solar spectrum of the LED light source, the approximate weight ratio between the phosphors is as described above. In this way, after being packaged into a device, the color tolerance range is smaller. Therefore, through the synergistic effect between the above-mentioned unique blue light chip and phosphor, the spectrum of the full-spectrum LED light source of the embodiment of the present invention is closer to the solar spectrum.

[0030] 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. Aluminate system green phosphors have better stability; preferably, the chemical formula of the first green phosphor is The chemical formula of the second green phosphor is Furthermore, the chemical formula of the red phosphor is preferably The red phosphor is The structure is the same, and has Higher external quantum efficiency and thermal stability.

[0031] In some embodiments, based on 100% by weight of the total phosphor weight, the first green phosphor comprises 5%-10% by weight, the second green phosphor comprises 82%-90% by weight, and the red phosphor comprises 3%-10% by weight. When these three types of phosphors are used to achieve a solar-like spectrum for an LED light source, the approximate weight ratios between the phosphors are as described above. This results in a narrower color tolerance range after packaging the resulting device.

[0032] In some embodiments, the red light chip is made of a four-element red light chip with a wavelength of 650-720nm, a narrow half-wave width, and easy-to-control spectral energy. The specific structure of the red light lamp bead 3 is: the red light chip is fixed to the PLCC bracket with silver glue, and the electrode frame of the PLCC bracket and the electrode of the red light chip are connected with bonding wires, and then the PLCC bracket is filled with silicone resin, and after curing, a complete red light lamp bead 3 is formed.

[0033] In some embodiments, a lamp bead pad 11 is provided on the PCB board 1, and a high thermal conductivity solder paste 12 is printed on the lamp bead pad 11. The white light lamp bead 2 and the red light lamp bead 3 are soldered on the lamp bead pad 11 by reflow soldering, which can fix the lamp bead and conduct electricity and heat. Connection positions 13 are provided at both ends of the PCB board 1 for interconnecting multiple PCB boards 1 or connecting a driving power supply. This design enables the formed lamp board to be installed with different numbers of lamp boards according to the needs of the lamp, so as to meet the requirements of the lamp for light parameters and electrical parameters.

[0034] In some embodiments, the PCB board 1 includes an aluminum plate, a high thermal conductivity insulation layer is provided on the surface of the aluminum plate, a copper layer circuit is covered on the high thermal conductivity insulation layer, and the top layer is sprayed with high reflective ink (not shown in the drawings). This design enables the PCB board 1 to have the functions of heat conduction, fixing lamp beads, mutual connection, and connection to the driving power supply.

[0035] Based on the research on the human eye and the impact of spectrum on human health, this invention uses low-intensity dual blue light to excite white light LED lamp beads of aluminate and nitride, and then configures red light LED lamp beads that can promote human blood microcirculation according to the spectral energy distribution ratio, ultimately forming a life and health spectrum that improves vision and regulates human microcirculation.

[0036] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A hybrid full-spectrum eye-health LED light source, characterized in that: It includes a PCB board, white light lamp beads and red light lamp beads. The white light lamp beads and red light lamp beads are installed on the PCB board according to the quantity ratio calculated by spectral energy distribution; The white light lamp beads include at least two blue light chips for emitting blue light of different wavelengths and a fluorescent glue for encapsulating the plurality of blue light chips, wherein the blue light chips are electrically connected in parallel, and the fluorescent glue includes an encapsulating glue and phosphors of at least three different wavelengths mixed in the encapsulating glue and used to cooperate with the plurality of blue light chips to generate white light; The red light bead includes at least one red light chip for emitting red light, and the red light wavelength range of the red light bead is 650-720nm; The ratio of the number of the white light beads to the red light beads ranges from 5:1 to 18:1, and the ratio of their radiation fluxes ranges from 10:1 to 36:1; The white light lamp bead includes two blue light chips, namely a first blue light chip with a peak wavelength range of 450-460nm and a second blue light chip with a peak wavelength range of 460-470nm; The difference in forward operating voltage between the first blue light chip and the second blue light chip is less than or equal to 5%, and the peak intensity ratio of the first blue light chip and the second blue light chip under the same operating conditions is (1-1.2): (0.8-1); The fluorescent glue includes three types of phosphors, namely a first green phosphor with a peak wavelength range of 510-515nm, a second green phosphor with a peak wavelength range of 500-540nm, and a red phosphor with a peak wavelength range of 650-660nm. Based on the total weight of the phosphors as 100%, the mass percentage of the first green phosphor is 5%-10%, the mass percentage of the second green phosphor is 82%-90%, and the mass percentage of the red phosphor is 3%-10%. The first green phosphor and the second green phosphor are both aluminate system phosphors, and the red phosphor is a carbonitride system phosphor.

2. The hybrid full-spectrum eye health LED light source according to claim 1, characterized in that: The chemical formula of the first green phosphor is , the chemical formula of the second green phosphor is , the chemical formula of the red phosphor is .

3. The hybrid full-spectrum eye-health LED light source according to claim 1, characterized in that: The red light chip is a four-element red light chip, and the red light lamp bead also includes a PLCC bracket. The red light chip is fixed on the PLCC bracket through silver glue, and the electrodes of the red line chip are connected to the electrode frame of the PLCC bracket through bonding wires. The PLCC bracket is filled with silicone resin and formed into the red light lamp bead after curing.

4. The hybrid full-spectrum eye health LED light source according to claim 1, characterized in that: A lamp bead pad is provided on the PCB board, 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; connection positions are provided at both ends of the PCB board for interconnecting multiple PCB boards or connecting a driving power supply.

5. The hybrid full-spectrum eye health LED light source according to claim 1, characterized in that: The PCB board comprises an aluminum plate, a heat-conducting insulating layer is provided on the surface of the aluminum plate, a copper layer circuit is covered on the heat-conducting insulating layer, and a reflective ink layer is sprayed on the top layer.

Images