LED light-emitting device and preparation method and application thereof

Abstract

The invention relates to the technical field of photoelectricity, and discloses an LED light-emitting device and a preparation method and application thereof.The LED light-emitting device comprises a blue light LED chip, the blue light LED chip is covered with a mixture of red fluorescent powder, gray fluorescent powder and packaging glue, the red fluorescent powder is fluorescent powder with the emission peak wavelength being 650-700 nm under blue light excitation, and the gray fluorescent powder is fluorescent powder with the emission peak wavelength being 650-700 nm under blue light excitation. The gray fluorescent powder is fluorescent powder with the emission peak wavelength of 750-830 nm under the excitation of blue light. The LED light-emitting device can emit red light and near-infrared light at the same time, the spectrum coverage range is wide, and the good physical therapy effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic technology, and in particular to an LED light-emitting device and a preparation method and application thereof. Background Art

[0002] Red light is considered the spectrum of life because red light waves can easily penetrate the human body and reach the germs, reduce inflammation and sterilize the affected area, improve protein solidification, promote blood circulation, enhance immunity and metabolism. Existing spectrum therapy LEDs are mainly red light 630-660nm, with a narrow spectrum coverage. The light color quality of spectrum therapy LEDs is poor, which greatly reduces the therapeutic effect of the lamps. In addition, during the production process of existing spectrum therapy LEDs, the chip and bracket packaging connection is poor, which shortens the service life of the equipment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an LED light-emitting device which can emit red light and near-infrared light simultaneously, has a wide spectrum coverage, and has a good therapeutic effect.

[0004] The technical problem to be solved by the present invention is also to provide a method for preparing an LED light-emitting device, which has a simple process and can stably prepare an LED light-emitting device with good light-emitting efficiency.

[0005] In order to solve the above technical problems, the present invention provides an LED light-emitting device, including a blue light LED chip, wherein the blue light LED chip is covered with a mixture of red phosphor, gray phosphor and packaging glue, wherein the red phosphor is a phosphor having an emission peak wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor having an emission peak wavelength of 750nm to 830nm under blue light excitation.

[0006] In some embodiments, the mass of the packaging glue: the mass of the red phosphor: the mass of the gray phosphor = 100: (50-70): (10-30).

[0007] In some embodiments, the chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ .

[0008] In some embodiments, the ratio of Cr to Ga is 1:(1-8).

[0009] In some embodiments, the blue LED chip is a flip-chip blue LED chip.

[0010] In some embodiments, the wavelength of the blue LED chip is 435nm-445nm.

[0011] In some embodiments, the packaging adhesive material is one of epoxy resin, modified epoxy resin, organic silicone or polyurethane.

[0012] In some embodiments, the packaging glue is organic silica gel with a viscosity of 2000mPa.s to 3500mPa.s.

[0013] Accordingly, the present invention provides a method for preparing an LED light-emitting device, comprising the following steps:

[0014] S1. Prepare a mixture of red phosphor, gray phosphor and encapsulation glue, wherein the red phosphor is a phosphor with a peak emission wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor with a peak emission wavelength of 750nm to 830nm under blue light excitation;

[0015] S2, covering the mixture of the red phosphor, the gray phosphor and the packaging adhesive on the blue LED chip.

[0016] And, an application of an LED light-emitting device as described above, wherein the LED light-emitting device is used for but not limited to physical therapy equipment.

[0017] The implementation of the present invention has the following beneficial effects:

[0018] The LED light-emitting device provided by the present invention can emit red light and near-infrared light at the same time, has a wide spectrum coverage, and has a good therapeutic effect. Among them, the long-wave red light of 650nm to 700nm is easily absorbed by mitochondria, and the catalase activity of mitochondria is increased, which promotes metabolism, increases glycogen content, protein synthesis, and adenosine triphosphate decomposition, thereby enhancing cell regeneration and promoting the healing of wounds and ulcers. At the same time, it also increases the phagocytic effect of white blood cells and improves the body's immune function. Near-infrared light with a wavelength of 750nm to 830nm can penetrate deep subcutaneous layers, has a good heat transfer effect, and produces cell energy ATP, accelerating the repair and regeneration of specific types of cells such as skin cells, bone cells, and vascular cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the spectrum of the LED light-emitting device provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In addition, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the examples of various specific processes and materials provided by the present invention, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0026] In the present invention, "preferred" and "better" are only used to describe implementation methods or embodiments with better effects, and it should be understood that they do not constitute a limitation on the scope of protection of the present invention. In the present invention, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features. In the present invention, when involving numerical ranges, unless otherwise specified, the two endpoints of the numerical range are included.

[0027] To solve the above problems, the present invention provides an LED light-emitting device, including a blue light LED chip, wherein the blue light LED chip is covered with a mixture of red phosphor, gray phosphor and packaging glue, wherein the red phosphor is a phosphor having an emission peak wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor having an emission peak wavelength of 750nm to 830nm under blue light excitation.

[0028] The LED light-emitting device provided by the present invention can emit red light and near-infrared light at the same time, has a wide spectrum coverage, and has a good therapeutic effect. Among them, the long-wave red light of 650nm to 700nm is easily absorbed by mitochondria, and the catalase activity of mitochondria is increased, which promotes metabolism, increases glycogen content, protein synthesis, and adenosine triphosphate decomposition, thereby enhancing cell regeneration and promoting the healing of wounds and ulcers. At the same time, it also increases the phagocytic effect of white blood cells and improves the body's immune function. Near-infrared light with a wavelength of 750nm to 830nm can penetrate deep subcutaneous layers, has a good heat transfer effect, and produces cell energy ATP, accelerating the repair and regeneration of specific types of cells such as skin cells, bone cells, and vascular cells.

[0029] In some embodiments, the mass of the encapsulating glue: the mass of the red phosphor: the mass of the gray phosphor = 100: (50-70): (10-30). Preferably, the mass of the encapsulating glue: the mass of the red phosphor: the mass of the gray phosphor = 100: (55-65): (15-25). More preferably, the mass of the encapsulating glue: the mass of the red phosphor: the mass of the gray phosphor = 100: (60-65): (20-25). Only the LED light-emitting device prepared by mixing according to the above ratio can obtain the specific wavelength spectrum required by the present invention, that is, it can simultaneously emit red light and near-infrared light, and the spectrum covers a wide range. The spectrum of the specific wavelength has a good effect of promoting metabolism.

[0030] In some embodiments, the chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ . In the above embodiment, for the band required for physical therapy, a small amount of Cr is used to replace the lattice position of Ga by doping to form an inorganic solid solution near-infrared gray phosphor. In some embodiments, the ratio of Cr to Ga is 1: (1 to 8). Preferably, the ratio of Cr to Ga is 1: (1 to 5). Doping Cr according to the above ratio can obtain a near-infrared gray phosphor with an emission peak wavelength of 750nm to 830nm. Near-infrared light of 750nm to 830nm can penetrate deep subcutaneous layers, has good heat transfer effects, and generates cell energy ATP, accelerating the repair and regeneration of specific types of cells such as skin cells, bone cells, and vascular cells.

[0031] In some embodiments, the blue LED chip is a flip-chip blue LED chip. The flip-chip is effectively welded to the bracket through solder paste, which eliminates the problem of poor weldability and prolongs the service life of the device. In some embodiments, the wavelength of the blue LED chip is 435nm to 445nm. In the above embodiment, there is no need to use an infrared emission chip. Only a blue LED chip with a specific wavelength and a phosphor with a specific component can be used to obtain an LED light-emitting device that emits red light and near-infrared light at the same time.

[0032] In some embodiments, the encapsulation glue material is one of epoxy resin, modified epoxy resin, organic silicone or polyurethane. Preferably, the encapsulation glue is an organic silicone with a viscosity of 2000mPa.s to 3500mPa.s. Low-viscosity organic silicone has good fluidity during use and can easily penetrate into the tiny gaps of the package, which not only improves the preparation efficiency, but also ensures the uniformity and integrity of the package. At the same time, low-viscosity organic silicone has high strength and toughness after curing, can provide good mechanical support, and also has good resistance to high and low temperatures, weather resistance and chemical corrosion resistance, and can maintain the stability of its physical and chemical properties for a long time.

[0033] Accordingly, the present invention provides a method for preparing an LED light-emitting device, comprising the following steps:

[0034] S1. Prepare a mixture of red phosphor, gray phosphor and encapsulation glue, wherein the red phosphor is a phosphor with a peak emission wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor with a peak emission wavelength of 750nm to 830nm under blue light excitation;

[0035] It should be noted that the mixing ratio and specific composition of the red phosphor, the gray phosphor and the encapsulation adhesive are as described above and will not be repeated here.

[0036] S2, covering the mixture of the red phosphor, the gray phosphor and the packaging adhesive on the blue LED chip.

[0037] In some embodiments, the blue flip chip is first effectively welded to the bracket through solder paste, and then the mixed mixture of the red phosphor, the gray phosphor and the packaging glue is injected into the blue flip chip through the piezoelectric valve.

[0038] And, the application of an LED light emitting device as described above, the LED light emitting device is used for but not limited to physical therapy equipment. An LED light emitting device as described above is used to prepare an LED that promotes metabolism spectrum, which is used in physical therapy fields such as promoting cell repair and regeneration.

[0039] The present invention is further described below with specific embodiments:

[0040] Example 1

[0041] The present embodiment provides an LED light-emitting device, including a blue light LED chip, wherein the blue light LED chip is covered with a mixture of red phosphor, gray phosphor and packaging glue, wherein the red phosphor is a phosphor having an emission peak wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor having an emission peak wavelength of 750nm to 830nm under blue light excitation.

[0042] Among them, the mass of the packaging glue: the mass of the red phosphor: the mass of the gray phosphor=100:60:20.

[0043] The chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ , where the ratio of Cr to Ga is 1:5.

[0044] The blue light LED chip is a flip-chip blue light LED chip, and the wavelength of the blue light LED chip is 435nm-445nm.

[0045] The packaging glue material is organic silica gel.

[0046] Figure 1 This is the spectrum of the LED light-emitting device provided in Example 1.

[0047] Example 2

[0048] The present embodiment provides an LED light-emitting device, including a blue light LED chip, wherein the blue light LED chip is covered with a mixture of red phosphor, gray phosphor and packaging glue, wherein the red phosphor is a phosphor having an emission peak wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor having an emission peak wavelength of 750nm to 830nm under blue light excitation.

[0049] Among them, the mass of the packaging glue: the mass of the red phosphor: the mass of the gray phosphor=100:70:15.

[0050] The chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ , where the ratio of Cr to Ga is 1:8.

[0051] The blue light LED chip is a flip-chip blue light LED chip, and the wavelength of the blue light LED chip is 435nm-445nm.

[0052] The packaging glue material is organic silica gel.

[0053] Example 3

[0054] The present embodiment provides an LED light-emitting device, including a blue light LED chip, wherein the blue light LED chip is covered with a mixture of red phosphor, gray phosphor and packaging glue, wherein the red phosphor is a phosphor having an emission peak wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor having an emission peak wavelength of 750nm to 830nm under blue light excitation.

[0055] Among them, the mass of the packaging glue: the mass of the red phosphor: the mass of the gray phosphor=100:50:28.

[0056] The chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ , where the ratio of Cr to Ga is 1:2.

[0057] The blue light LED chip is a flip-chip blue light LED chip, and the wavelength of the blue light LED chip is 435nm-445nm.

[0058] The packaging glue material is organic silica gel.

[0059] In the description of this specification, the description with reference to the terms "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above is a preferred embodiment of the invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the invention. These improvements and modifications are also considered to be within the scope of protection of the invention.

Claims

1. An LED light-emitting device, characterized in that: The invention comprises a blue light LED chip, which is covered with a mixture of red phosphor, gray phosphor and packaging glue. The red phosphor emits a peak wavelength of 650nm to 700nm under the excitation of blue light, and the gray phosphor emits a peak wavelength of 750nm to 830nm under the excitation of blue light.

2. The LED lighting device according to claim 1, characterized in that: The mass of the packaging glue: the mass of the red phosphor: the mass of the gray phosphor = 100: (50-70): (10-30).

3. The LED lighting device according to claim 1, characterized in that: The chemical formula of the gray phosphor is Y3Ga5O 12 :Cr 3+ .

4. The LED lighting device according to claim 3, characterized in that: The ratio of Cr to Ga is 1:(1~8).

5. The LED lighting device according to claim 1, characterized in that: The blue light LED chip is a flip-chip blue light LED chip.

6. The LED lighting device according to claim 1, characterized in that: The wavelength of the blue light LED chip is 435nm-445nm.

7. The LED lighting device according to claim 1, characterized in that: The packaging adhesive material is one of epoxy resin, modified epoxy resin, organic silica gel or polyurethane.

8. The LED lighting device according to claim 7, characterized in that: The packaging glue is organic silica gel with a viscosity of 2000mPa.s to 3500mPa.s.

9. A method for preparing an LED light-emitting device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Prepare a mixture of red phosphor, gray phosphor and encapsulation glue, wherein the red phosphor is a phosphor with a peak emission wavelength of 650nm to 700nm under blue light excitation, and the gray phosphor is a phosphor with a peak emission wavelength of 750nm to 830nm under blue light excitation; S2, covering the mixture of the red phosphor, the gray phosphor and the packaging adhesive on the blue LED chip.

10. The use of an LED lighting device according to claim 1, characterized in that: The LED lighting device is used for but not limited to physical therapy equipment.

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