A light engine and its use

Abstract

The present invention provides a light engine and its use, wherein the light engine is characterized in that it includes at least one light source generator and a wavelength conversion unit arranged in sequence on an optical path, wherein the light source generator is used to generate a light source with a wavelength of 200-1300nm; the wavelength conversion unit is used to receive the light source and emit the light source after conversion, and has a first wavelength conversion unit, the first wavelength conversion unit contains a first fluorescent material, the first fluorescent material can absorb light with a wavelength of 200-2100nm and be excited to convert the light of the wavelength into light with a wavelength of 2100-6000nm.

Description

Technical Field

[0001] The present invention relates to a light engine, in particular to a light engine which generates 2100-6000nm light by wavelength conversion and application thereof. Background Art

[0002] At present, light wavelengths in the range of about 2500-4000nm are widely used in human health care and other fields.

[0003] For example, in the massage and health care of human skin, when light hits the human body, the human skin cells will absorb the light immediately or partially reflect it. The absorbed part of the light will cause the molecular vibration of the skin or subcutaneous tissue cells, thereby generating heat. The 2500-4000nm light will cause the vibration of the human molecular bonds, massage the cells, and stimulate cell activity, because the frequency of the incident light is close to the vibration frequency of the CH bond, CO bond, or OH bond of the human cells. Sunlight is rich in 2500-4000nm light, so regular sunbathing can massage cells and make the body healthier.

[0004] At present, in order to better meet various health care needs, the application of artificially generating the required specific wavelength of light is becoming more and more widespread. However, the current artificial method is usually to electrically heat the heating wire to increase the temperature of the heating wire to 1000-3000 degrees, so that the heating wire emits infrared rays in a larger frequency range, and the radiation range may cover visible light, near infrared, mid-infrared, and far infrared. Or the heating wire is wrapped around a carbon rod or a ceramic rod, and the carbon rod or the ceramic rod is heated by the heating wire, so that the temperature of the carbon rod or the ceramic rod is increased to radiate infrared rays. The above-mentioned heating acquisition method cannot be narrowed due to its large half-peak width, at least around 1500nm, which means that its energy distribution is above 3000nm, and the energy corresponding to each wavelength, for example, the energy corresponding to 3000nm will be very small, that is, the energy at a specific wavelength point will account for a very small proportion of the total output energy, such as at 3000nm. In this way, it is impossible to concentrate the energy in the 2500-4000nm range that is helpful for cell light massage frequency, and the output proportion is small, so the application efficiency of these artificial infrared lights is low. For example, when used as light massage, the massage efficiency is very low and the light massage effect is relatively poor. Summary of the invention

[0005] The present invention is made to solve the above-mentioned problem, and aims to provide a light engine that generates light of 2100-6000nm by wavelength conversion.

[0006] In order to achieve the above object, the present invention adopts the following scheme:

[0007] The present invention provides a light engine, characterized in that it includes: at least one light source generator and a wavelength conversion unit arranged in sequence on an optical path, wherein the light source generator is used to generate a light source with a wavelength of 200-1300nm; the wavelength conversion unit is used to receive the light source and emit the light source after conversion, and has a first wavelength conversion unit, the first wavelength conversion unit contains a first fluorescent material, and the first fluorescent material can absorb light with a wavelength of 200-2100nm and be excited to convert the light of the wavelength into light with a wavelength of 2100-6000nm.

[0008] The light engine provided by the present invention also has such a feature, and further includes: a packaging device, having a bottom substrate arranged at the bottom and a packaging electrode packaged in the bottom substrate, wherein at least one light source generator is arranged on the bottom substrate, the light source generator is a chip or device that emits pump light, and is electrically connected to the packaging electrode, and the first wavelength conversion unit is formed by colloidally encapsulating the first fluorescent material.

[0009] The light engine provided by the present invention also has the following feature: the first wavelength conversion unit embeds each light source generator and then extends toward the top of the packaging device.

[0010] The light engine provided by the present invention also has the following feature: the first wavelength conversion unit is arranged above the light source generator.

[0011] The light engine provided by the present invention also has the following feature: a plurality of light source generators are evenly arranged side by side on the bottom substrate and are spaced apart from each other in a longitudinal direction with the first conversion unit.

[0012] The light engine provided by the present invention also has the following characteristics: the wavelength conversion part also includes at least one second wavelength conversion unit sequentially arranged between the light source generator and the first wavelength conversion unit, the light source generator is used to generate a light source with a wavelength of 200-1100nm, and the second wavelength conversion unit includes a second fluorescent material, which can absorb light with a wavelength of 200-1100nm and be excited to convert the light of this wavelength into light with a wavelength less than 2100nm.

[0013] The light engine provided by the present invention also has the following feature: the second wavelength conversion unit is formed by colloidally encapsulating the second fluorescent material.

[0014] The light engine provided by the present invention also has the following characteristics: at least one second wavelength conversion unit and the first wavelength conversion unit are sequentially stacked toward the top of the packaging device, and the second wavelength conversion unit at the bottom layer embeds each light source generator.

[0015] The light engine provided by the present invention also has the following characteristics: at least one second wavelength conversion unit and the first wavelength conversion unit are stacked from bottom to top of the packaged device, and there is a longitudinal gap between the second wavelength conversion unit located at the bottom layer and each light source generator.

[0016] The light engine provided by the present invention also has such a feature that the packaging device further has a light-transmitting substrate, which is located on the lower surface of the second conversion unit and has a longitudinal spacing with each light source generator.

[0017] The light engine provided by the present invention also has the following characteristics, wherein the packaging device also has a plurality of cavities spaced side by side and respectively corresponding to the second conversion units, which are arranged on the bottom substrate and respectively communicated with the bottom substrate; the upward side of the cavity is a light-transmitting surface; there are a plurality of light source generators, which respectively correspond to the plurality of cavities and are respectively arranged in the plurality of cavities and embedded by the corresponding second conversion units; the light path direction of the light source generator corresponds to the corresponding light-transmitting surface upward; and the first conversion units are longitudinally spaced above each cavity.

[0018] The light engine provided by the present invention also has such a feature that the packaging device also has a light-transmitting substrate, which is located on the lower surface of the first conversion unit and has a longitudinal spacing with each light source generator.

[0019] The light engine provided by the present invention also has the following feature: the first wavelength conversion unit is one of a film material, a solution, a sol or a solid powder containing a first fluorescent material.

[0020] The light engine provided by the present invention also has the following feature: the first fluorescent material is powder particles with a particle size of 5-50 μm.

[0021] The light engine provided by the present invention also has the following feature: the first fluorescent material is powder particles with a particle size of 20-50 μm.

[0022] The light engine provided by the present invention also has the following feature: the first fluorescent material is powder particles with a particle size of 8-20 μm.

[0023] The present invention also provides the application of the above-mentioned light engine in any one or more purposes of infrared light massage, infrared light therapy, infrared light heating, infrared light automatic drying or infrared light cooking.

[0024] Function and Effect of the Invention

[0025] The light engine provided by the present invention has a first wavelength conversion unit in the first wavelength conversion part, which contains a first fluorescent material that can absorb light with a wavelength of 200-2100nm and convert the light with the wavelength into light with a wavelength of 2100-6000nm when excited, so that the first wavelength conversion part can convert the light source with a wavelength of 200-1300nm into light with a wavelength of 2100-6000nm for emission, and because of the excitation method of the fluorescent material, the half-peak width is about 150nm, so that the wavelength can be concentrated in a specifically required range, so that most of the output wavelengths are in the frequency range of 2500-4000nm that is beneficial to the human body, thereby improving the health care efficiency, and can be applied to any use that requires the provision of light in this band, such as infrared light massage, infrared light heating, infrared light automatic drying or infrared light cooking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the structure of the light engine involved in Example 1;

[0027] Figure 2 A schematic diagram of the spectrum emitted by the light engine involved in Example 1;

[0028] Figure 3 is a schematic diagram of the structure of the light engine involved in Example 2;

[0029] Figure 4 is a schematic diagram of the structure of the light engine involved in Example 3;

[0030] Figure 5 is a schematic diagram of the structure of the light engine involved in Example 4;

[0031] Figure 6 is a schematic diagram of the structure of the light engine involved in Example 5;

[0032] Figure 7 It is a structural schematic diagram of a modified example of the light engine involved in Embodiment 2 and Embodiment 4;

[0033] Figure 8 It is a structural diagram of another variation of the light engine related to Embodiment 2 and Embodiment 4. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific examples. For the specific methods or materials used in the examples, those skilled in the art can make conventional replacements and selections based on the technical ideas of the present invention and according to existing technologies, and are not limited to the specific descriptions of the examples of the present invention.

[0035] Example 1

[0036] Figure 1Schematic diagram of the structure of the light engine involved in Example 1.

[0037] like Figure 1 As shown, the light engine 100 in this embodiment includes a packaging device 10 , a light source generator 20 and a wavelength conversion unit 30 .

[0038] The packaging device 10 is a support body having side supports 11 arranged on both sides, a bottom substrate 12 arranged at the bottom, and packaging electrodes.

[0039] The package electrode is packaged in the base substrate 12 and has two electrodes 131 and an electrode 132 .

[0040] The light source generator 20 is used to generate a light source with a wavelength of 200-1300nm and is electrically connected to the package electrode. The light source in this embodiment is a pump light, that is, the light source generator is a chip or device 20 that can generate pump light. The pump chip or device 20 can be Figure 1 The flip chip shown may also be a horizontal structure, a vertical chip, or other structures. When a driving current passes between the electrode 131 and the electrode 132, the current flows through the pump chip or device 20 through the electrode 131, and then flows through the electrode 132 through the pump chip or device 20, so that the pump chip or device 20 generates a light source with a wavelength of 200-1300nm, that is, it excites and emits infrared rays of 2100-6000nm. The infrared rays will irradiate the organism, causing the CH bonds, CO bonds, or OH bonds in the organic molecules of the human body to resonate, thereby performing light massage, so that the organic molecules of the human body can accelerate metabolism and produce a fever sensation, thereby achieving the purpose of promoting human health. The light source generator 20 can be one or more, and in this embodiment, it is one, which is arranged on the bottom substrate 12.

[0041] The wavelength conversion unit 30 is used to receive the above-mentioned 200-1300nm light source, and convert the light source into an emission light with a wavelength of 2100-6000nm and emit it. In this embodiment, the wavelength conversion unit 30 has a first wavelength conversion unit 31 .

[0042] The first wavelength conversion unit 31 contains a first fluorescent material, which can absorb light with a wavelength of 200-2100nm and be excited to convert the light with the wavelength into an emission light with a wavelength of 2100-6000nm, so that the first wavelength conversion unit 31 can convert the above-mentioned 200-1300nm light source to obtain the above-mentioned 2100-6000nm emission light, and can make the half-peak width about 150nm, so that the wavelength can be concentrated in the specific required range, so that most of the output wavelength is the required 2500-4000nm range that helps the cell light massage frequency. The first fluorescent material is a powder particle. Since the size of the powder particle will affect the final conversion efficiency of the light wavelength, the particle size of the powder particle needs to be within a certain range. Preferably, the particle size range of the powder particle is 5-50μm, and more preferably, 20-50μm. At this time, the conversion efficiency of the above-mentioned specific wavelength of 200-1300nm is the highest. When the particle size of the powder particles is in the range of 8-20um, the final conversion efficiency to the above wavelengths will generally decrease, but the brightness consistency of the packaged products will be improved.

[0043] The first wavelength conversion unit 31 may be prepared as one of a thin film material, a solution, a sol or solid powder particles containing a first fluorescent material.

[0044] The first wavelength conversion unit 31 can also be formed by encapsulating the first fluorescent material in a colloid, that is, the above-mentioned thin film material, solution, sol or solid powder containing the first fluorescent material is encapsulated in a colloid to obtain the first wavelength conversion unit 31. At this time, the role of the colloid is to serve as a channel for light propagation. The material mainly has viscosity requirements, high temperature curing requirements, and optical transmittance requirements of the target band. The material is required to have a certain fluidity at room temperature to facilitate production operations and mixing with fluorescent substances. The transmittance of infrared rays is required to reach 80%, and it has temperature stability and ultraviolet stability. Temperature stability means that it can withstand the test of a certain operating temperature without damage or phase change. It is usually required that it will not be damaged or phase change within 150 degrees; ultraviolet stability means that the material needs to withstand a certain amount of ultraviolet radiation without brittleness or yellowing, and the optical transmittance is not significantly attenuated. It is usually required to have an intensity of 0.25w / cm 2 Under 360nm ultraviolet irradiation for 24 hours, there is no obvious yellowing and the transmittance attenuation is less than 5%.

[0045] In this embodiment, the first wavelength conversion unit 31 formed by colloidally encapsulating the first fluorescent material buries each light source generator and then extends toward the top of the packaging device 10 .

[0046] Figure 2 This is a schematic diagram of the spectrum emitted by the light engine involved in Example 1.

[0047] like Figure 2 As shown, the light engine 100 of this embodiment emits a spectrum concentrated in the range of 2500-4000 nm.

[0048] Example 2

[0049] The following is a description of Example 2.

[0050] In Embodiment 2, the same symbols are given to the same structures as those in Embodiment 1, and the same description is omitted.

[0051] Figure 3 This is a schematic diagram of the structure of the light engine involved in Example 2.

[0052] like Figure 3 As shown, in this embodiment, the light engine 200 includes a packaging device 210, a light source generator 220, and a wavelength conversion unit 230. The packaging electrodes are not shown in the figure.

[0053] The difference between this embodiment and embodiment 1 is that there are multiple light source generators 220, and the first wavelength conversion unit 231 of the wavelength conversion part 230 is arranged above the packaging device 10. At this time, the multiple light source generators 220 are evenly arranged side by side on the bottom substrate 12 of the packaging device 10, and have a longitudinal spacing with the first conversion unit 232 respectively. In this way, there can be a certain distance between the wavelength conversion part 230 and the light source generator 220, so that the first fluorescent material can be kept away from the light source generator 220, so that the temperature will not be too high during use, thereby improving the radiation efficiency of the fluorescent material and reducing the absorption rate of the packaging colloid to the generated infrared rays.

[0054] In addition, in this embodiment, in order to fix and shape the first conversion unit 231, the packaging device 210 may further include a transparent substrate 214. At this time, the transparent substrate 214 is located on the lower surface of the first conversion unit 231 and has a longitudinal interval with each light source generator 20. The transparent substrate 214 is used as a coating base for the fluorescent material to fix and shape the fluorescent material, so it is necessary to maintain sufficient mechanical strength; and the material of the transparent substrate needs to have a high optical transmittance, especially the pump wavelength band and the target wavelength band, both of which need a high transmittance, and also need to have processability.

[0055] In addition, the plurality of light source generators 220 are arranged at intervals in order to ultimately obtain more uniformly emitted infrared rays. In practical applications, the number of light source generators 220 can be adjusted according to the size of the light engine, and can also be one.

[0056] Example 3

[0057] The following is a description of Example 3.

[0058] In Example 3, the same symbols are given to the same structures as in Example 1, and the same description is omitted.

[0059] Figure 4 Schematic diagram of the structure of the light engine involved in Example 3.

[0060] like Figure 4 As shown, in this embodiment, the light engine 300 includes a packaging device 10 , a light source generator 320 and a wavelength conversion unit 330 .

[0061] The difference between this embodiment and the first embodiment is that the wavelength conversion portion 330 has a first wavelength conversion unit 331 and a second wavelength conversion unit 332 .

[0062] At least one second wavelength conversion unit 332 is arranged between the first wavelength conversion unit 331 and the light source generator 220, and contains a second fluorescent material. The second fluorescent material can absorb light with a wavelength of 200-1100nm and convert the light of this wavelength into light with a wavelength less than 2100nm when excited. That is, the function of the second wavelength conversion unit 332 is to convert the light source with a shorter wavelength into a wavelength suitable for the excitation conversion of the first wavelength conversion unit 331. At this time, the light source generator 320 generates a light source with a wavelength of 200-1100nm.

[0063] In this embodiment, the second fluorescent material is also powder particles. In order to better convert the 200-1100nm light source into light with a wavelength less than 2100nm, the powder particle size range of the second fluorescent material is the same as the powder particle size range of the first fluorescent material, preferably 5-50μm, more preferably 20-50μm. Similarly, when the powder particle size range is 8-20um, the final conversion efficiency for the above wavelength will usually decrease, but the brightness consistency of the packaged product will be improved.

[0064] At least one second wavelength conversion unit 332 and the first wavelength conversion unit 331 are stacked 10 from the bottom to the top of the packaging device. The second wavelength conversion unit 332 can be one or more. When there are more than one, the multiple stacked second wavelength conversion units 332 convert the 200-630nm light source between different wavelengths in sequence until the light with a wavelength less than 2100nm is finally converted by the first wavelength conversion unit 331. In this embodiment, there is one.

[0065] In this embodiment, the second wavelength conversion unit 332 is also formed by encapsulating a thin film material, solution, sol or solid powder containing a second fluorescent material through colloid. The light source generator 320 is embedded in the same way as the second conversion unit 31 in embodiment 1. When there are multiple second conversion units 332, the light source generator 320 is embedded in the second wavelength conversion unit 332 at the bottom layer.

[0066] Example 4

[0067] The following is a description of Example 4.

[0068] In Embodiment 4, the same symbols are given to the same structures as those in Embodiment 3, and the same description is omitted.

[0069] Figure 5 This is a schematic diagram of the structure of the light engine involved in Example 4.

[0070] like Figure 5 As shown, this embodiment is similar to Embodiment 3, except that, in at least one second wavelength conversion unit 432, the bottom-layer second wavelength conversion unit 432 and the light source generator 320 have the same longitudinal spacing as in Embodiment 2, so as to facilitate heat dissipation and cooling of the fluorescent material.

[0071] At this time, as in Example 2, the packaging device 410 can also have a transparent substrate 414 for fixing and forming the second conversion unit 432. At this time, the transparent substrate 414 is located on the lower surface of the second conversion unit 432 and has a longitudinal spacing between each light source generator 20.

[0072] Example 5

[0073] The following is a description of Example 5.

[0074] In Example 5, the same symbols are given to the same structures as in Example 3, and the same description is omitted.

[0075] Figure 6 This is a schematic diagram of the structure of the light engine involved in Example 5.

[0076] In this embodiment, Figure 6 As shown, the light engine 500 includes a packaging device 510 , a light source generator 520 , and a wavelength conversion unit 530 .

[0077] The difference between this embodiment and Embodiment 3 is that the packaging device 510 further has a plurality of cavities 514 spaced side by side and corresponding to the second conversion units 532, which are arranged on the bottom substrate 512 and respectively connected to the bottom substrate 512; the upward side of the cavity 514 is a light-transmitting surface; a plurality of light source generators 520 correspond to the plurality of cavities 514 and are respectively arranged in the plurality of cavities 514 and are embedded by the corresponding second conversion units 532; the light path direction of the light source generator 520 is upward corresponding to the corresponding light-transmitting surface; and the first conversion units 531 are longitudinally spaced above the plurality of cavities 514.

[0078] At this time, as in the second embodiment, the packaging device 510 may further include a light-transmitting substrate 514 for fixing and shaping the first conversion unit 532 .

[0079] Example Function and Effect

[0080] In the light engines provided in Examples 1 to 5, the first wavelength conversion unit in the first wavelength conversion part contains a first fluorescent material that can absorb light with a wavelength of 200-2100nm and convert the light with the wavelength into light with a wavelength of 2100-6000nm when excited, so that the first wavelength conversion part can convert the light source with a wavelength of 200-1300nm into light with a wavelength of 2100-6000nm for emission, and because of the excitation method of the fluorescent material, the half-peak width is about 150nm, so that the wavelength can be concentrated in the specifically required range, so that most of the output wavelengths are in the range of 2500-4000nm, which is a frequency beneficial to the human body, thereby improving the massage and health care efficiency;

[0081] In addition, in Embodiment 2 and Embodiment 4, there is a gap between the first wavelength conversion unit or the second wavelength conversion unit and the light source generator. As the light engine provided by the present invention, when it is not in the embedded form, it can also be as follows Figure 7 and Figure 8 In the two variations shown, the first wavelength conversion unit 631 or the second wavelength unit 732 can also be directly arranged in close contact with the light path direction of the light source generator 20, so that the entire light engine is more compact.

[0082] In addition, in the above embodiments, the packaged light engine may be square, circular, semicircular, or the like.

[0083] In addition, the light engines provided in the above embodiments are all packaged using packaging devices. In actual applications, depending on the usage or scenario, a packaging device may not be required. As long as the light source generator and the wavelength conversion unit are provided and connected to external electrodes, it can be used.

[0084] In addition, the light engine provided in the above embodiment is used for the purpose of providing infrared cell massage. As a light engine of the present invention, since it can convert energy-concentrated 2100-6000nm light, it can be used in any application that requires providing light in this band, such as infrared light heating, infrared light automatic drying or infrared light cooking.

Claims

1. A light engine, characterized in that: include: At least one light source generator and a wavelength conversion unit are sequentially arranged on the optical path, Wherein, the light source generator is used to generate a light source with a wavelength of 200-1300nm; The wavelength conversion part is used to receive the light source and emit the light source after conversion, and has a first wavelength conversion unit. The first wavelength conversion unit contains a first fluorescent material, which can absorb light with a wavelength of 200-2100nm and convert the light with the wavelength into light with a wavelength of 2100-6000nm when excited. The wavelength conversion unit further includes at least one second wavelength conversion unit sequentially arranged between the light source generator and the first wavelength conversion unit, the second wavelength conversion unit includes a second fluorescent material, and the second fluorescent material can absorb light with a wavelength of 200-1100nm and be excited to convert the light of the wavelength into light with a wavelength less than 2100nm. The second wavelength conversion unit is formed by colloidally encapsulating the second fluorescent material.

2. The light engine according to claim 1, characterized in that: Also includes: A packaging device having a bottom substrate disposed at the bottom and packaging electrodes packaged in the bottom substrate, Wherein, at least one of the light source generators is disposed on the bottom substrate. The light source generator is a chip or device that emits pump light and is electrically connected to the package electrode. The first wavelength conversion unit is formed by colloidally encapsulating the first fluorescent material.

3. The light engine according to claim 2, characterized in that: in, The first wavelength conversion unit embeds each of the light source generators and then extends toward the top of the packaging device.

4. The light engine according to claim 2, characterized in that: in, The first wavelength conversion unit is disposed above the light source generator.

5. The light engine according to claim 4, characterized in that: in, The light source generators are arranged side by side and spaced evenly on the bottom substrate and have longitudinal spacings between them and the first wavelength conversion units.

6. The light engine according to claim 2, characterized in that: in, At least one of the second wavelength conversion units and the first wavelength conversion unit are sequentially stacked toward the top of the packaging device, and the second wavelength conversion unit located at the bottom layer embeds each of the light source generators.

7. The light engine according to claim 2, characterized in that: in, At least one of the second wavelength conversion units and the first wavelength conversion unit are stacked in sequence from bottom to top of the packaging device, and a longitudinal interval exists between the second wavelength conversion unit located at the bottom layer and each of the light source generators.

8. The light engine according to claim 2, wherein: in, The packaging device further comprises a light-transmitting substrate, which is located on the lower surface of the second wavelength conversion unit and has a longitudinal interval with each of the light source generators.

9. The light engine according to claim 2, characterized in that: in, The packaging device further comprises a plurality of cavities arranged on the bottom substrate and respectively connected to the bottom substrate and spaced apart from each other and corresponding to each of the second wavelength conversion units. The upward side of the cavity is a light-transmitting side. There are a plurality of light source generators, which correspond to the plurality of cavities respectively and are respectively arranged in the plurality of cavities and embedded by the corresponding second wavelength conversion units. The light path direction of the light source generator is upward and corresponds to the corresponding light-transmitting surface. The first wavelength conversion units are disposed above each of the cavities at intervals in the longitudinal direction.

10. The light engine according to claim 5 or 9, characterized in that: in, The packaging device further comprises a light-transmitting substrate, which is located on the lower surface of the first wavelength conversion unit and has a longitudinal interval with each of the light source generators.

11. The light engine according to any one of claims 1 to 10, characterized in that: in, The first wavelength conversion unit is one of a thin film material, a solution, a sol or solid powder particles containing the first fluorescent material.

12. The light engine according to claim 11, characterized in that: in, The first fluorescent material is powder particles with a particle size of 20-50 μm.

13. The light engine according to claim 11, characterized in that: in, The first fluorescent material is powder particles with a particle size of 8-20 μm.

14. An application of the light engine as claimed in any one of claims 1 to 13 for any one or more purposes of infrared light massage, infrared light therapy, infrared light heating, infrared light automatic drying or infrared light cooking.

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