WO2020015363A1 - Wavelength conversion apparatus - Google Patents

Wavelength conversion apparatus Download PDF

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Publication number
WO2020015363A1
WO2020015363A1 PCT/CN2019/076631 CN2019076631W WO2020015363A1 WO 2020015363 A1 WO2020015363 A1 WO 2020015363A1 CN 2019076631 W CN2019076631 W CN 2019076631W WO 2020015363 A1 WO2020015363 A1 WO 2020015363A1
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Prior art keywords
layer
wavelength conversion
light
diamond film
conversion device
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PCT/CN2019/076631
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French (fr)
Chinese (zh)
Inventor
李乾
刘莹莹
王艳刚
李屹
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深圳光峰科技股份有限公司
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Publication of WO2020015363A1 publication Critical patent/WO2020015363A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements

Definitions

  • the invention relates to a wavelength conversion device, and belongs to the technical field of lighting and display.
  • the wavelength conversion material which is a fluorescent material developed for the characteristics of laser-excited phosphors, requires high brightness, high thermal conductivity, and high optical conversion efficiency.
  • the wavelength conversion material is the core component of the laser fluorescence light source. Its role is to convert the short-wavelength and high-power laser emitted by the laser into longer wavelength visible light. Therefore, the performance of the wavelength conversion material directly determines the performance of the laser fluorescence light source.
  • the main body of the wavelength conversion material is a fluorescent layer, and the fluorescent layer is used as the light emitting layer of the wavelength conversion material.
  • the different packaging methods determine the final light conversion performance of the wavelength conversion device.
  • the packaging method of the fluorescent layer includes organic resin, silicone rubber, inorganic glass and inorganic ceramics.
  • the wavelength conversion device is made into a round rotatable wheel-color wheel structure, which is matched with a high-performance motor and rotates at high speed during use.
  • the excitation light power in a laser fluorescent light source is very high.
  • a large amount of heat is also generated.
  • one of the main obstacles to the improvement of the color wheel performance is that the convective heat dissipation of the color wheel and air is not enough to sufficiently and timely dissipate the accumulated heat inside the color wheel.
  • the accumulation of heat causes the temperature to rise and the light conversion efficiency of the fluorescent layer to decrease or fail. Therefore, improving the external heat dissipation efficiency of the color wheel is an urgent problem to be solved at present.
  • the technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a wavelength conversion device.
  • a transparent diamond film layer By adding a transparent diamond film layer, the thermal conductivity of the wavelength conversion device is increased, and the diffusion rate of heat in the wavelength conversion device is enhanced. Therefore, the heat generated by the light-emitting layer is rapidly diffused, the thermal saturation effect of the fluorescent layer in the light-emitting layer is reduced, and the light-emitting efficiency caused by the deterioration of the characteristics of the fluorescent layer is prevented.
  • the invention provides a wavelength conversion device, which includes a substrate, a reflective layer, and a light emitting layer that are sequentially stacked.
  • the wavelength conversion device further includes a transparent diamond film layer disposed on the substrate and / or the light emitting layer.
  • the transparent diamond film layer is disposed on a side of the light emitting layer away from the reflective layer.
  • the transparent diamond film layer is disposed between the substrate and the reflective layer.
  • the transparent diamond film layer is disposed on a side of the light-emitting layer away from the reflective layer, and between the substrate and the reflective layer.
  • a fin-type heat sink is provided on a side of the substrate away from the reflective layer.
  • one side of the substrate provided with a fin-type heat sink is connected to a driving device, the substrate is a disc type, and the reflective layer, the light emitting layer, and the transparent diamond film layer are all circular rings.
  • the transparent diamond film layer is disposed on a side of the substrate away from the reflective layer.
  • the transparent diamond film layer is further disposed on a side of the light emitting layer away from the reflective layer, and between the substrate and the reflective layer.
  • the thickness of the light emitting layer is 0 ⁇ m to 500 ⁇ m.
  • the film thickness of the transparent diamond film layer is 0 ⁇ m-50 ⁇ m.
  • the present invention increases the thermal conductivity of the wavelength conversion device and enhances the diffusion rate of heat in the wavelength conversion device, so that the heat generated by the light emitting layer is rapidly diffused and the light emitting layer is reduced.
  • the thermal saturation effect of the fluorescent layer prevents the degradation of the luminous efficiency caused by the deterioration of the characteristics of the fluorescent layer.
  • FIG. 1 is a schematic structural diagram of a wavelength conversion device according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a heat radiation effect of a wavelength conversion device in the prior art
  • FIG. 3 is a schematic diagram of a heat dissipation effect of a wavelength conversion device according to a first embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a third wavelength conversion device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a four-wavelength conversion device according to an embodiment of the present invention.
  • the present invention provides a wavelength conversion device including a substrate 104, a reflective layer 103, and a light emitting layer 102 which are sequentially stacked.
  • the material of the substrate 104 is metal or ceramic.
  • the light emitting layer 102 is used for absorbing excitation light and emitting laser light having a wavelength different from the excitation light.
  • the excitation light here may be light from a solid-state light source, such as LED light, laser diode light, laser light, or other light.
  • the light-emitting layer 102 includes a wavelength conversion material, which may be a fluorescent glass layer formed by melting phosphor and glass powder, and a pure-phase fluorescent ceramic layer composed of YAG: Ce 3+ , or may be a YAG: Ce 3+ mixed oxidation A multi-phase fluorescent ceramic layer formed of an aluminum material.
  • the present invention does not limit the type of the light-emitting layer 102, and those skilled in the art may select a packaging structure with a phosphor in the prior art as the light-emitting layer 102 in the present invention according to actual needs.
  • the thickness of the light emitting layer 102 is 0 ⁇ m to 500 ⁇ m, and preferably 200 ⁇ m.
  • the reflective layer 103 is configured to reflect the laser light and the partially unconverted excitation light.
  • the reflective layer 103 may be formed by mixing and solidifying reflective filler particles (such as titanium oxide, aluminum oxide, magnesium oxide, calcium oxide, etc.) and silica gel, or may be formed by mixing and melting reflective filler particles and glass frit. It can be a silver-plated layer, an aluminum-plated layer, or a ceramic layer (such as alumina ceramics) having a higher reflectivity.
  • the light emitting layer 102 can be provided on the wavelength conversion device through various ways.
  • the paste material of the reflective layer 103 and the paste material of the light-emitting layer 102 can be sequentially brush-coated on the substrate 104, and then the light-emitting layer 102, the reflection layer 103, and the substrate 104 are tightly combined together by sintering;
  • the light emitting layer 102 is first processed into a thin sheet, and then directly bonded to the reflective layer 103 sintered on the substrate 104.
  • the wavelength conversion device further includes a transparent diamond film layer 101 disposed on the substrate 104 and / or the light emitting layer 102.
  • the transparent diamond film layer 101 may be disposed on a side of the light emitting layer 102 away from the reflective layer 103; the transparent diamond film layer 101 may also be disposed on a side of the substrate 104 away from the reflective layer 103, or on the substrate 104 and reflective layer 103.
  • the transparent diamond film layer 101 has the characteristics of high thermal conductivity and small thermal expansion coefficient. Specifically, the thermal conductivity of diamond is 1000-2000 W / (m ⁇ k). At room temperature, the thermal conductivity of diamond is 15 times that of silicon and 5 times that of copper. Applying the transparent diamond film to the wavelength conversion device can quickly diffuse a large amount of heat generated when the light emitting layer 102 is excited, and convert it from point heat to surface heat. Local heat will quickly diffuse out through the transparent diamond film, reducing the fluorescence in the light emitting layer 102 The thermal saturation effect of the powder particles prevents the deterioration of the characteristics of the phosphor and the decrease of the luminous efficiency.
  • the transparent diamond film layer 101 has a small thermal expansion coefficient, has excellent properties such as high transparency and abrasion resistance, and can be deposited on the surface of materials such as ceramics, glass, metal, etc., it can be firmly combined with the light emitting layer 102 or the substrate 104. The generated heat spreads quickly.
  • the transparent diamond film layer 101 can be prepared by filtering cathode vacuum arc technology to realize the plating of the transparent diamond film layer on the substrate 104 and / or the light-emitting layer 102.
  • the target material is 99.99% pure graphite during sputtering deposition.
  • the substrate 104 and / or the light emitting layer 102 are placed in a vacuum deposition chamber, and a diamond thin film is deposited on the surface to form a transparent diamond film layer 101.
  • the bonding force between the transparent diamond film layer 101 and the substrate 104 and the bonding force between the transparent diamond film layer 101 and the light-emitting layer 102 are related to the film thickness of the transparent diamond film layer 101. If the film layer is too thick, the transparent diamond film layer 101 may suffer from cracking or poor bonding. If the film layer is too thin, the transparent diamond film layer 101 cannot effectively dissipate heat. Therefore, in the present invention, the transparent diamond film
  • the thickness of the film layer of the layer 101 is 0 ⁇ m to 50 ⁇ m, and preferably 40 ⁇ m to 50 ⁇ m.
  • FIG. 1 is a schematic structural diagram of a wavelength conversion device according to a first embodiment of the present invention.
  • the wavelength conversion device includes a substrate 104, a reflective layer 103, and a light emitting layer 102 that are sequentially stacked.
  • the wavelength conversion device further includes a transparent diamond film disposed on the light emitting layer 102 side away from the reflective layer 103. Layer 101.
  • the substrate 104 is of a disc shape, and the reflective layer 103, the light emitting layer 102, and the transparent diamond film layer 101 are all circular rings.
  • a fin-type heat sink 105 is provided on a side of the substrate 104 away from the reflective layer 103, and the role of the fin-type heat sink 105 is generated after the excitation light is irradiated to the wavelength conversion device. Part of the heat is diffused into the air.
  • One side of the substrate 104 provided with a finned heat sink 105 is connected to a driving device 106 (such as a motor, etc.).
  • the driving device 106 is used to drive the substrate 104 to rotate about its central axis, so that the excitation light is emitted from the light emitting layer 102.
  • the light spots formed thereon periodically act on the light emitting layer 102 according to a circular path.
  • FIG. 2 is a schematic diagram of a heat dissipation effect of a wavelength conversion device in the prior art
  • FIG. 3 is a schematic diagram of a heat dissipation effect of a wavelength conversion device according to an embodiment of the present invention.
  • the excitation light 107 is incident from the transparent diamond film layer 101, passes through the transparent diamond film layer 101, enters the light emitting layer 102, and passes through the reflective layer.
  • 103 reflects and emerges from the surface of the transparent diamond film layer 101.
  • the heat 108 generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101.
  • the thermal conductivity of the transparent diamond film layer 101 is much larger than that of the light-emitting layer 102, The heat will spread laterally, so that the heat dissipation of the wavelength conversion device is changed from point heat dissipation to surface heat dissipation.
  • the heat dissipation area S2 is increased in this embodiment. During heat dissipation, the speed of heat diffusion is further accelerated.
  • FIG. 4 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention. As shown in FIG. 4, this embodiment is different from the first embodiment in that the setting position of the transparent diamond film layer 101 is changed: the transparent diamond film layer 101 is disposed between the substrate 104 and the reflective layer 103. .
  • the excitation light is incident from the light-emitting layer 102, and then reflected by the reflection layer 103, and is emitted from the surface of the light-emitting layer 102.
  • the heat generated by the light emitting layer 102 is transmitted to the transparent diamond film layer 101. Since the thermal conductivity of the transparent diamond film layer 101 is much larger than the thermal conductivity of the light emitting layer 102, the heat in the transparent diamond film layer 101 It will spread laterally, so that the heat dissipation of the wavelength conversion device is changed from point heat dissipation to surface heat dissipation. Compared with the heat dissipation area of the wavelength conversion device in the prior art, the heat dissipation area is increased in this embodiment. In high-speed rotating convection heat dissipation, The speed of heat diffusion is further accelerated.
  • FIG. 5 is a schematic structural diagram of a third wavelength conversion device according to an embodiment of the present invention. As shown in FIG. 5, this embodiment is different from the first embodiment in that a transparent diamond film layer 101 is not only provided on the light-emitting layer 102 side away from the reflective layer 103, but also between the substrate 104 and the reflective layer 103.
  • the transparent diamond film layer 101 is provided, and the thicknesses of the two types of transparent diamond film layers 101 may be the same or different.
  • the excitation light 107 is incident from the transparent diamond film layer 101, passes through the transparent diamond film layer 101, enters the light emitting layer 102, and then is reflected by the reflection layer 103, and is emitted from the surface of the transparent diamond film layer 101.
  • the heat generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101 on the substrate 104 and the light-emitting layer 102, respectively. Since the thermal conductivity of the transparent diamond film layer 101 is much larger than that of the light-emitting layer 102 The heat in the transparent diamond film layer 101 will spread laterally and change from point heat dissipation to surface heat dissipation, which increases the heat diffusion speed.
  • FIG. 6 is a schematic structural diagram of a four-wavelength conversion device according to an embodiment of the present invention. As shown in FIG. 6, this embodiment is different from the first embodiment in that the side of the substrate 104 far from the reflective layer 103 is not provided with a fin-type heat sink 105, but a transparent diamond film is provided. Layer 101.
  • the excitation light is incident from the light-emitting layer 102, and then reflected by the reflection layer 103, and is emitted from the surface of the light-emitting layer 102.
  • the heat generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101 through the reflective layer 103 and the substrate 104, and the conventional fin-type heat sink 105 is replaced by the transparent diamond film layer 101 with high thermal conductivity. , So that the heat transmitted through the substrate 104 can be quickly diffused.
  • the excitation light does not pass through the transparent diamond film layer 101. Therefore, in this embodiment, for the transparent diamond film layer 101 disposed on the substrate 104 away from the reflective layer 103, Transparency is not high.
  • a transparent diamond film layer 101 can also be provided between the substrate 104 and the reflective layer 103, and further, the light emitting layer 102 is far from the reflective layer 103.
  • a transparent diamond film layer 101 is also provided on one side.
  • the wavelength conversion device in the present invention may also be replaced with a fixed wavelength conversion device, that is, the substrate 104 is not connected to any driving device.
  • the present invention provides a wavelength conversion device.
  • the thermal conductivity of the wavelength conversion device is increased, and the diffusion rate of heat in the wavelength conversion device is enhanced, so that the heat generated by the light-emitting layer is rapid. Diffusion reduces the thermal saturation effect of the fluorescent layer in the light-emitting layer and prevents the degradation of the light-emitting efficiency caused by the deterioration of the characteristics of the fluorescent layer.

Abstract

A wavelength conversion apparatus, comprising a substrate (104), a reflecting layer (103) and a light-emitting layer (102) which are successively laminated. The wavelength conversion apparatus further comprises a transparent diamond film layer (101) arranged on the substrate (104) and/or the light-emitting layer (102). According to the present invention, by means of adding the transparent diamond film layer, the heat conductivity coefficient of the wavelength conversion apparatus is increased, and the rate of heat diffusion in the wavelength conversion apparatus is increased, such that heat generated by the light-emitting layer is rapidly diffused, thereby relieving the heat saturation effect of a fluorescent layer in the light-emitting layer and preventing a reduction in the light-emitting efficiency caused by the degradation of the characteristics of the fluorescent layer.

Description

波长转换装置Wavelength conversion device 技术领域Technical field
本发明涉及一种波长转换装置，属于照明及显示技术领域。The invention relates to a wavelength conversion device, and belongs to the technical field of lighting and display.
背景技术Background technique
随着激光显示技术的不断发展，蓝色激光激发荧光材料获得可见光的技术获得很大进展。目前针对激光激发荧光粉的特性开发的荧光材料即波长转换材料的要求有高亮度、高导热性能、光学转换效率高等。With the continuous development of laser display technology, the technology of blue laser excited fluorescent materials to obtain visible light has made great progress. At present, the wavelength conversion material, which is a fluorescent material developed for the characteristics of laser-excited phosphors, requires high brightness, high thermal conductivity, and high optical conversion efficiency.
波长转换材料是激光荧光光源的核心部件，其作用是将激光器发出的短波长、大功率激光转化成更长波长的可见光，因此波长转换材料的性能直接决定了激光荧光光源的性能。波长转换材料的主体为荧光层，荧光层做为波长转换材料的发光层，其不同封装方式决定了波长转换装置的最终光转换性能。目前荧光层的封装方式有有机树脂、有机硅胶、无机玻璃及无机陶瓷，一般将波长转换装置制成圆形可旋转的轮子-色轮结构，匹配高性能马达后，在使用时高速旋转。The wavelength conversion material is the core component of the laser fluorescence light source. Its role is to convert the short-wavelength and high-power laser emitted by the laser into longer wavelength visible light. Therefore, the performance of the wavelength conversion material directly determines the performance of the laser fluorescence light source. The main body of the wavelength conversion material is a fluorescent layer, and the fluorescent layer is used as the light emitting layer of the wavelength conversion material. The different packaging methods determine the final light conversion performance of the wavelength conversion device. At present, the packaging method of the fluorescent layer includes organic resin, silicone rubber, inorganic glass and inorganic ceramics. Generally, the wavelength conversion device is made into a round rotatable wheel-color wheel structure, which is matched with a high-performance motor and rotates at high speed during use.
激光荧光光源中的激发光功率很高，照射在波长转换材料上除了产生可见光之外，同时还会产生大量的热量。色轮散热主要有两种形式：一种是通过马达的高速旋转，荧光层表面直接与环境形成对流散热；另一种是热量先经反射层传导到基板，再由基板表面与环境形成对流散热。The excitation light power in a laser fluorescent light source is very high. In addition to generating visible light when irradiated on a wavelength conversion material, a large amount of heat is also generated. There are two main forms of color wheel heat dissipation: one is through the high-speed rotation of the motor, the surface of the fluorescent layer directly forms convection heat dissipation with the environment; the other is that the heat is first transmitted to the substrate through the reflective layer, and then the surface of the substrate and the environment form convection heat dissipation. .
目前色轮性能提高的主要障碍之一，就是色轮与空气的对流散热不足以将色轮内部积累的热量充分、及时的散去，热量的堆积导致温度上升造成荧光层光转换效率下降或失效，因此提高色轮对外散热效率是目前急需解决的问题。At present, one of the main obstacles to the improvement of the color wheel performance is that the convective heat dissipation of the color wheel and air is not enough to sufficiently and timely dissipate the accumulated heat inside the color wheel. The accumulation of heat causes the temperature to rise and the light conversion efficiency of the fluorescent layer to decrease or fail. Therefore, improving the external heat dissipation efficiency of the color wheel is an urgent problem to be solved at present.
发明内容Summary of the invention
本发明所要解决的技术问题在于针对现有技术的不足，提供一种波长转换装置，通过增设透明金刚石膜层，提高了波长转换装置的导热系数，增强了热量在波长转换装置内的扩散速率，从而使发光层产生的热量迅速扩散，降低了发光层中荧光层的热饱和效应，防止荧光层特性劣化而引起的发光效率降低。The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a wavelength conversion device. By adding a transparent diamond film layer, the thermal conductivity of the wavelength conversion device is increased, and the diffusion rate of heat in the wavelength conversion device is enhanced. Therefore, the heat generated by the light-emitting layer is rapidly diffused, the thermal saturation effect of the fluorescent layer in the light-emitting layer is reduced, and the light-emitting efficiency caused by the deterioration of the characteristics of the fluorescent layer is prevented.
本发明所要解决的技术问题是通过如下技术方案实现的：The technical problem to be solved by the present invention is achieved through the following technical solutions:
本发明提供一种波长转换装置，包括依次层叠的基板、反射层和发光层，所述波长转换装置还包括设置在基板和/或发光层上的透明金刚石膜层。The invention provides a wavelength conversion device, which includes a substrate, a reflective layer, and a light emitting layer that are sequentially stacked. The wavelength conversion device further includes a transparent diamond film layer disposed on the substrate and / or the light emitting layer.
优选地，所述透明金刚石膜层设置在发光层远离反射层的一侧。Preferably, the transparent diamond film layer is disposed on a side of the light emitting layer away from the reflective layer.
优选地，所述透明金刚石膜层设置在基板与反射层之间。Preferably, the transparent diamond film layer is disposed between the substrate and the reflective layer.
优选地，所述透明金刚石膜层设置在发光层远离反射层的一侧，以及基板与反射层之间。Preferably, the transparent diamond film layer is disposed on a side of the light-emitting layer away from the reflective layer, and between the substrate and the reflective layer.
为了提高波长转换装置的散热能力，所述基板远离反射层的一侧设有鳍片式散热器。In order to improve the heat dissipation capability of the wavelength conversion device, a fin-type heat sink is provided on a side of the substrate away from the reflective layer.
优选地，所述基板设有鳍片式散热器的一侧与驱动设备连接，所述基板为圆盘型，所述反射层、发光层以及透明金刚石膜层均为圆环形。Preferably, one side of the substrate provided with a fin-type heat sink is connected to a driving device, the substrate is a disc type, and the reflective layer, the light emitting layer, and the transparent diamond film layer are all circular rings.
优选地，所述透明金刚石膜层设置在所述基板远离反射层的一侧。Preferably, the transparent diamond film layer is disposed on a side of the substrate away from the reflective layer.
优选地，所述透明金刚石膜层还设置在发光层远离反射层的一侧，以及基板与反射层之间。Preferably, the transparent diamond film layer is further disposed on a side of the light emitting layer away from the reflective layer, and between the substrate and the reflective layer.
为保证波长转换装置的转换效率，所述发光层的厚度为0μm-500μm。In order to ensure the conversion efficiency of the wavelength conversion device, the thickness of the light emitting layer is 0 μm to 500 μm.
为了保证透明金刚石膜层的散热能力以及其与基板之间的结合力，所述透明金刚石膜层的膜层厚度为0μm-50μm。In order to ensure the heat dissipation ability of the transparent diamond film layer and the bonding force between the transparent diamond film layer and the substrate, the film thickness of the transparent diamond film layer is 0 μm-50 μm.
综上所述，本发明通过增设透明金刚石膜层，提高了波长转换装置的导热系数，增强了热量在波长转换装置内的扩散速率，从而使发光层产生的热量迅速扩散，降低了发光层中荧光层的热饱和效应，防止荧光层特性劣化而引起的发光效率降低。In summary, by adding a transparent diamond film layer, the present invention increases the thermal conductivity of the wavelength conversion device and enhances the diffusion rate of heat in the wavelength conversion device, so that the heat generated by the light emitting layer is rapidly diffused and the light emitting layer is reduced. The thermal saturation effect of the fluorescent layer prevents the degradation of the luminous efficiency caused by the deterioration of the characteristics of the fluorescent layer.
下面结合附图和具体实施例，对本发明的技术方案进行详细地说 明。The technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明实施例一波长转换装置的结构示意图；1 is a schematic structural diagram of a wavelength conversion device according to a first embodiment of the present invention;
图2为现有技术中波长转换装置的散热效果示意图；2 is a schematic diagram of a heat radiation effect of a wavelength conversion device in the prior art;
图3为本发明实施例一波长转换装置的散热效果示意图；3 is a schematic diagram of a heat dissipation effect of a wavelength conversion device according to a first embodiment of the present invention;
图4为本发明实施例二波长转换装置的结构示意图；4 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention;
图5为本发明实施例三波长转换装置的结构示意图；5 is a schematic structural diagram of a third wavelength conversion device according to an embodiment of the present invention;
图6为本发明实施例四波长转换装置的结构示意图。FIG. 6 is a schematic structural diagram of a four-wavelength conversion device according to an embodiment of the present invention.
具体实施方式detailed description
本发明提供一种波长转换装置，包括依次层叠的基板104、反射层103和发光层102。The present invention provides a wavelength conversion device including a substrate 104, a reflective layer 103, and a light emitting layer 102 which are sequentially stacked.
所述基板104的材质为金属或陶瓷。The material of the substrate 104 is metal or ceramic.
所述发光层102用于吸收激发光并出射波长不同于所述激发光的受激光，这里的激发光可以为固态光源发出的光，如LED光、激光二极管光、激光器光，也可以为其他现有技术中公开的光源光。所述发光层102内包含波长转换材料，其可以是荧光粉和玻璃粉熔融形成的荧光玻璃层、以及YAG:Ce 3+构成的纯相荧光陶瓷层，也可以是YAG:Ce 3+混合氧化铝材料形成的复相荧光陶瓷层。需要说明的是，本发明并不限制发光层102的种类，本领域技术人员可根据实际需要选择现有技术中具有荧光粉的封装结构作为本发明中的发光层102。 The light emitting layer 102 is used for absorbing excitation light and emitting laser light having a wavelength different from the excitation light. The excitation light here may be light from a solid-state light source, such as LED light, laser diode light, laser light, or other light. Light source light disclosed in the prior art. The light-emitting layer 102 includes a wavelength conversion material, which may be a fluorescent glass layer formed by melting phosphor and glass powder, and a pure-phase fluorescent ceramic layer composed of YAG: Ce 3+ , or may be a YAG: Ce 3+ mixed oxidation A multi-phase fluorescent ceramic layer formed of an aluminum material. It should be noted that the present invention does not limit the type of the light-emitting layer 102, and those skilled in the art may select a packaging structure with a phosphor in the prior art as the light-emitting layer 102 in the present invention according to actual needs.
为保证波长转换装置的转换效率，所述发光层102的厚度为0μm-500μm，优选200μm。In order to ensure the conversion efficiency of the wavelength conversion device, the thickness of the light emitting layer 102 is 0 μm to 500 μm, and preferably 200 μm.
所述反射层103用于反射所述受激光和部分未转换的所述激发光。所述反射层103可以由反射填料粒子(如氧化钛、氧化铝、氧化镁、氧化钙等)与硅胶混合固化形成，也可以由反射填料粒子与玻璃粉混合熔融形成；所述反射层103还可以为具有较高反射率的镀银层、镀铝层或陶瓷层(如氧化铝陶瓷等)。The reflective layer 103 is configured to reflect the laser light and the partially unconverted excitation light. The reflective layer 103 may be formed by mixing and solidifying reflective filler particles (such as titanium oxide, aluminum oxide, magnesium oxide, calcium oxide, etc.) and silica gel, or may be formed by mixing and melting reflective filler particles and glass frit. It can be a silver-plated layer, an aluminum-plated layer, or a ceramic layer (such as alumina ceramics) having a higher reflectivity.
本领域技术人员可以根据实际需要选择不同种类的发光层102和 反射层103来生产波长转换装置。Those skilled in the art can select different kinds of light emitting layers 102 and reflective layers 103 to produce a wavelength conversion device according to actual needs.
在制造所述波长转换装置时，发光层102可以通过多种途径设置在波长转换装置上。例如，可以将反射层103的浆料原料和发光层102的浆料原料依次刷涂于基板104上，之后通过烧结使发光层102、反射层103及基板104紧密的结合在一起；还可以将发光层102先加工成薄片，之后直接与烧结在基板104上的反射层103粘结。When the wavelength conversion device is manufactured, the light emitting layer 102 can be provided on the wavelength conversion device through various ways. For example, the paste material of the reflective layer 103 and the paste material of the light-emitting layer 102 can be sequentially brush-coated on the substrate 104, and then the light-emitting layer 102, the reflection layer 103, and the substrate 104 are tightly combined together by sintering; The light emitting layer 102 is first processed into a thin sheet, and then directly bonded to the reflective layer 103 sintered on the substrate 104.
本发明中波长转换装置还包括设置在基板104和/或发光层102上的透明金刚石膜层101。具体来说，所述透明金刚石膜层101可以设置在发光层102远离反射层103的一侧；所述透明金刚石膜层101还可以设置在基板104远离反射层103的一侧，或者设置在基板104与反射层103之间。In the present invention, the wavelength conversion device further includes a transparent diamond film layer 101 disposed on the substrate 104 and / or the light emitting layer 102. Specifically, the transparent diamond film layer 101 may be disposed on a side of the light emitting layer 102 away from the reflective layer 103; the transparent diamond film layer 101 may also be disposed on a side of the substrate 104 away from the reflective layer 103, or on the substrate 104 and reflective layer 103.
所述透明金刚石膜层101具有热导率高且热膨胀系数小的特性。具体来说，金刚石的热导率为1000-2000W/(m·k)，在室温下，金刚石的热导率是硅的15倍，铜的5倍。将透明金刚石膜运用在波长转换装置上，能够将激发发光层102时产生的大量热量迅速扩散，由点散热转换成面散热，局部热量会通过透明金刚石膜迅速扩散出去，降低发光层102中荧光粉颗粒的热饱和效应，防止荧光粉特性劣化、发光效率降低。另外，由于透明金刚石膜层101的热膨胀系数小，具有高透明度、耐磨损等优异性能，且能沉积在陶瓷、玻璃、金属等材料的表面，可与发光层102或基板104牢固结合，将产生的热量迅速扩散。The transparent diamond film layer 101 has the characteristics of high thermal conductivity and small thermal expansion coefficient. Specifically, the thermal conductivity of diamond is 1000-2000 W / (m · k). At room temperature, the thermal conductivity of diamond is 15 times that of silicon and 5 times that of copper. Applying the transparent diamond film to the wavelength conversion device can quickly diffuse a large amount of heat generated when the light emitting layer 102 is excited, and convert it from point heat to surface heat. Local heat will quickly diffuse out through the transparent diamond film, reducing the fluorescence in the light emitting layer 102 The thermal saturation effect of the powder particles prevents the deterioration of the characteristics of the phosphor and the decrease of the luminous efficiency. In addition, because the transparent diamond film layer 101 has a small thermal expansion coefficient, has excellent properties such as high transparency and abrasion resistance, and can be deposited on the surface of materials such as ceramics, glass, metal, etc., it can be firmly combined with the light emitting layer 102 or the substrate 104. The generated heat spreads quickly.
所述透明金刚石膜层101的制备可以采用过滤阴极真空电弧技术来实现透明金刚石膜层在基板104和/或发光层102上的镀覆，溅射沉积时靶材选用纯度为99.99％的石墨靶，设定实验环境气压和实验温度(如室温)后，将基板104和/或发光层102置于真空沉积室中，在其表面沉积金刚石薄膜以形成透明金刚石膜层101。The transparent diamond film layer 101 can be prepared by filtering cathode vacuum arc technology to realize the plating of the transparent diamond film layer on the substrate 104 and / or the light-emitting layer 102. The target material is 99.99% pure graphite during sputtering deposition. After setting the experimental ambient pressure and the experimental temperature (such as room temperature), the substrate 104 and / or the light emitting layer 102 are placed in a vacuum deposition chamber, and a diamond thin film is deposited on the surface to form a transparent diamond film layer 101.
透明金刚石膜层101与基板104之间的结合力，以及透明金刚石膜层101与发光层102之间的结合力均与透明金刚石膜层101的膜层厚度有关。若膜层太厚，透明金刚石膜层101可能会发生开裂或结合不牢等不良现象若，若膜层太薄，透明金刚石膜层101无法有效的散热，因此，在本发明中，透明金刚石膜层101的膜层厚度为0μm-50μm， 优选为40μm-50μm。The bonding force between the transparent diamond film layer 101 and the substrate 104 and the bonding force between the transparent diamond film layer 101 and the light-emitting layer 102 are related to the film thickness of the transparent diamond film layer 101. If the film layer is too thick, the transparent diamond film layer 101 may suffer from cracking or poor bonding. If the film layer is too thin, the transparent diamond film layer 101 cannot effectively dissipate heat. Therefore, in the present invention, the transparent diamond film The thickness of the film layer of the layer 101 is 0 μm to 50 μm, and preferably 40 μm to 50 μm.
以下将结合附图对本发明各实施例的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所得到的所有其他实施例，都属于本发明所保护的范围。The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
实施例一Example one
图1为本发明实施例一波长转换装置的结构示意图。如图1所示，在本实施例中，波长转换装置包括依次层叠的基板104、反射层103和发光层102，波长转换装置还包括设置在发光层102远离反射层103一侧的透明金刚石膜层101。FIG. 1 is a schematic structural diagram of a wavelength conversion device according to a first embodiment of the present invention. As shown in FIG. 1, in this embodiment, the wavelength conversion device includes a substrate 104, a reflective layer 103, and a light emitting layer 102 that are sequentially stacked. The wavelength conversion device further includes a transparent diamond film disposed on the light emitting layer 102 side away from the reflective layer 103. Layer 101.
在本实施例中，所述基板104为圆盘型，所述反射层103、发光层102以及透明金刚石膜层101均为圆环形。为了提高波长转换装置的散热能力，所述基板104远离反射层103的一侧设有鳍片式散热器105，所述鳍片式散热器105的作用为将激发光照射波长转换装置后产生的部分热量扩散至空气中。所述基板104设有鳍片式散热器105的一侧与驱动设备106(如马达等)连接，所述驱动设备106用于驱动基板104围绕其中心轴旋转，以使得激发光在发光层102上形成的光斑按照圆形路径周期性的作用于所述发光层102。In this embodiment, the substrate 104 is of a disc shape, and the reflective layer 103, the light emitting layer 102, and the transparent diamond film layer 101 are all circular rings. In order to improve the heat dissipation capability of the wavelength conversion device, a fin-type heat sink 105 is provided on a side of the substrate 104 away from the reflective layer 103, and the role of the fin-type heat sink 105 is generated after the excitation light is irradiated to the wavelength conversion device. Part of the heat is diffused into the air. One side of the substrate 104 provided with a finned heat sink 105 is connected to a driving device 106 (such as a motor, etc.). The driving device 106 is used to drive the substrate 104 to rotate about its central axis, so that the excitation light is emitted from the light emitting layer 102. The light spots formed thereon periodically act on the light emitting layer 102 according to a circular path.
图2为现有技术中波长转换装置的散热效果示意图；图3为本发明实施例一波长转换装置的散热效果示意图。如图2和图3所示，由于本实施例中设置了透明金刚石膜层101，激发光107由透明金刚石膜层101入射，透过透明金刚石膜层101后进入发光层102，再经反射层103反射，由透明金刚石膜层101表面出射。在上述过程中，发光层102所产生的热量108传导到透明金刚石膜层101，由于透明金刚石膜层101的热导率远远大于发光层102的热导率，在透明金刚石膜层101内的热量会横向扩散，使得波长转换装置的散热由点散热转变为面散热，相比与现有技术中波长转换装置的散热面积S1，本实施例中散热面积S2有所增加，在高速旋转的对流散热中，进一步加快了热量的扩散速度。FIG. 2 is a schematic diagram of a heat dissipation effect of a wavelength conversion device in the prior art; FIG. 3 is a schematic diagram of a heat dissipation effect of a wavelength conversion device according to an embodiment of the present invention. As shown in FIG. 2 and FIG. 3, since a transparent diamond film layer 101 is provided in this embodiment, the excitation light 107 is incident from the transparent diamond film layer 101, passes through the transparent diamond film layer 101, enters the light emitting layer 102, and passes through the reflective layer. 103 reflects and emerges from the surface of the transparent diamond film layer 101. In the above process, the heat 108 generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101. Since the thermal conductivity of the transparent diamond film layer 101 is much larger than that of the light-emitting layer 102, The heat will spread laterally, so that the heat dissipation of the wavelength conversion device is changed from point heat dissipation to surface heat dissipation. Compared with the heat dissipation area S1 of the wavelength conversion device in the prior art, the heat dissipation area S2 is increased in this embodiment. During heat dissipation, the speed of heat diffusion is further accelerated.
实施例二Example two
图4为本发明实施例二波长转换装置的结构示意图。如图4所示，本实施例与实施例一相比，其不同之处在于透明金刚石膜层101的设置位置发生了变化：所述透明金刚石膜层101设置在基板104与反射层103之间。FIG. 4 is a schematic structural diagram of a wavelength conversion device according to a second embodiment of the present invention. As shown in FIG. 4, this embodiment is different from the first embodiment in that the setting position of the transparent diamond film layer 101 is changed: the transparent diamond film layer 101 is disposed between the substrate 104 and the reflective layer 103. .
在本实施例中，激发光由发光层102入射，再经反射层103反射作用，由发光层102表面出射。在上述过程中，发光层102所产生的热量传导到透明金刚石膜层101，由于透明金刚石膜层101的热导率远远大于发光层102的热导率，在透明金刚石膜层101内的热量会横向扩散，使得波长转换装置的散热由点散热转变为面散热，相比于现有技术中波长转换装置的散热面积，本实施例中散热面积有所增加，在高速旋转的对流散热中，进一步加快了热量的扩散速度。In this embodiment, the excitation light is incident from the light-emitting layer 102, and then reflected by the reflection layer 103, and is emitted from the surface of the light-emitting layer 102. In the above process, the heat generated by the light emitting layer 102 is transmitted to the transparent diamond film layer 101. Since the thermal conductivity of the transparent diamond film layer 101 is much larger than the thermal conductivity of the light emitting layer 102, the heat in the transparent diamond film layer 101 It will spread laterally, so that the heat dissipation of the wavelength conversion device is changed from point heat dissipation to surface heat dissipation. Compared with the heat dissipation area of the wavelength conversion device in the prior art, the heat dissipation area is increased in this embodiment. In high-speed rotating convection heat dissipation, The speed of heat diffusion is further accelerated.
本实施例中的其他内容与实施例一相同，在此不再赘述。The other contents in this embodiment are the same as those in the first embodiment, and details are not described herein again.
实施例三Example three
图5为本发明实施例三波长转换装置的结构示意图。如图5所示，本实施例与实施例一相比，其不同之处在于不仅在发光层102远离反射层103一侧设置了透明金刚石膜层101，基板104与反射层103之间也设置了透明金刚石膜层101，且上述两种透明金刚石膜层101的厚度可以相同，也可以不同。FIG. 5 is a schematic structural diagram of a third wavelength conversion device according to an embodiment of the present invention. As shown in FIG. 5, this embodiment is different from the first embodiment in that a transparent diamond film layer 101 is not only provided on the light-emitting layer 102 side away from the reflective layer 103, but also between the substrate 104 and the reflective layer 103. The transparent diamond film layer 101 is provided, and the thicknesses of the two types of transparent diamond film layers 101 may be the same or different.
在本实施例中，激发光107由透明金刚石膜层101入射，透过透明金刚石膜层101后进入发光层102，再经反射层103反射作用，由透明金刚石膜层101表面出射。在上述过程中，发光层102所产生的热量分别传导到位于基板104以及发光层102上的透明金刚石膜层101，由于透明金刚石膜层101的热导率远远大于发光层102的热导率，在透明金刚石膜层101内的热量会横向扩散，由点散热转变为面散热，提高了热量的扩散速度。In this embodiment, the excitation light 107 is incident from the transparent diamond film layer 101, passes through the transparent diamond film layer 101, enters the light emitting layer 102, and then is reflected by the reflection layer 103, and is emitted from the surface of the transparent diamond film layer 101. In the above process, the heat generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101 on the substrate 104 and the light-emitting layer 102, respectively. Since the thermal conductivity of the transparent diamond film layer 101 is much larger than that of the light-emitting layer 102 The heat in the transparent diamond film layer 101 will spread laterally and change from point heat dissipation to surface heat dissipation, which increases the heat diffusion speed.
本实施例中的其他内容与实施例一相同，在此不再赘述。The other contents in this embodiment are the same as those in the first embodiment, and details are not described herein again.
实施例四Embodiment 4
图6为本发明实施例四波长转换装置的结构示意图。如图6所示，本实施例与实施例一相比，其不同之处在于，所述基板104远离反射层103的一侧并没有设置鳍片式散热器105，而是设置了透明金刚石膜层101。FIG. 6 is a schematic structural diagram of a four-wavelength conversion device according to an embodiment of the present invention. As shown in FIG. 6, this embodiment is different from the first embodiment in that the side of the substrate 104 far from the reflective layer 103 is not provided with a fin-type heat sink 105, but a transparent diamond film is provided. Layer 101.
在本实施例中，激发光由发光层102入射，再经反射层103反射作用，由发光层102表面出射。在上述过程中，发光层102所产生的热量经反射层103和基板104后传导到透明金刚石膜层101，通过采用热导率高的透明金刚石膜层101来代替传统的鳍片式散热器105，使得经基板104传来的热量能够迅速得到扩散。In this embodiment, the excitation light is incident from the light-emitting layer 102, and then reflected by the reflection layer 103, and is emitted from the surface of the light-emitting layer 102. In the above process, the heat generated by the light-emitting layer 102 is transmitted to the transparent diamond film layer 101 through the reflective layer 103 and the substrate 104, and the conventional fin-type heat sink 105 is replaced by the transparent diamond film layer 101 with high thermal conductivity. , So that the heat transmitted through the substrate 104 can be quickly diffused.
需要说明的是，由于在本实施例中，激发光并不经过透明金刚石膜层101，因此，本实施例中对于设置在所述基板104远离反射层103一侧的透明金刚石膜层101，其透明度要求不高。It should be noted that, in this embodiment, the excitation light does not pass through the transparent diamond film layer 101. Therefore, in this embodiment, for the transparent diamond film layer 101 disposed on the substrate 104 away from the reflective layer 103, Transparency is not high.
与实施例二和实施例三类似，为了提高散热效果，在本实施例中，还可以在基板104与反射层103之间设置透明金刚石膜层101，进一步地，在发光层102远离反射层103一侧也设置透明金刚石膜层101。Similar to the second embodiment and the third embodiment, in order to improve the heat dissipation effect, in this embodiment, a transparent diamond film layer 101 can also be provided between the substrate 104 and the reflective layer 103, and further, the light emitting layer 102 is far from the reflective layer 103. A transparent diamond film layer 101 is also provided on one side.
本实施例中的其他内容与实施例一相同，在此不再赘述。The other contents in this embodiment are the same as those in the first embodiment, and details are not described herein again.
需要说明的是，在上述多个实施例中，本发明中所述波长转换装置也可替换为固定式的波长转换装置，即所述基板104没有与任何驱动设备连接。It should be noted that, in the above embodiments, the wavelength conversion device in the present invention may also be replaced with a fixed wavelength conversion device, that is, the substrate 104 is not connected to any driving device.
综上所述，本发明提供一种波长转换装置，通过增设透明金刚石膜层，提高了波长转换装置的导热系数，增强了热量在波长转换装置内的扩散速率，从而使发光层产生的热量迅速扩散，降低了发光层中荧光层的热饱和效应，防止荧光层特性劣化而引起的发光效率降低。In summary, the present invention provides a wavelength conversion device. By adding a transparent diamond film layer, the thermal conductivity of the wavelength conversion device is increased, and the diffusion rate of heat in the wavelength conversion device is enhanced, so that the heat generated by the light-emitting layer is rapid. Diffusion reduces the thermal saturation effect of the fluorescent layer in the light-emitting layer and prevents the degradation of the light-emitting efficiency caused by the deterioration of the characteristics of the fluorescent layer.

Claims (10)

  1. 一种波长转换装置，包括依次层叠的基板(104)、反射层(103)和发光层(102)，其特征在于，所述波长转换装置还包括设置在基板(104)和/或发光层(102)上的透明金刚石膜层(101)。A wavelength conversion device includes a substrate (104), a reflective layer (103), and a light-emitting layer (102) that are sequentially stacked. The wavelength conversion device further includes a substrate (104) and / or a light-emitting layer ( 102) with a transparent diamond film layer (101).
  2. 如权利要求1所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)设置在发光层(102)远离反射层(103)的一侧。The wavelength conversion device according to claim 1, wherein the transparent diamond film layer (101) is disposed on a side of the light emitting layer (102) away from the reflective layer (103).
  3. 如权利要求1所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)设置在基板(104)与反射层(103)之间。The wavelength conversion device according to claim 1, wherein the transparent diamond film layer (101) is disposed between the substrate (104) and the reflective layer (103).
  4. 如权利要求1所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)设置在发光层(102)远离反射层(103)的一侧，以及基板(104)与反射层(103)之间。The wavelength conversion device according to claim 1, wherein the transparent diamond film layer (101) is disposed on a side of the light emitting layer (102) away from the reflective layer (103), and the substrate (104) and the reflective layer ( 103).
  5. 如权利要求2-4中任一项所述的波长转换装置，其特征在于，所述基板(104)远离反射层(103)的一侧设有鳍片式散热器(105)。The wavelength conversion device according to any one of claims 2-4, wherein a side of the substrate (104) remote from the reflective layer (103) is provided with a fin heat sink (105).
  6. 如权利要求5所述的波长转换装置，其特征在于，所述基板(104)设有鳍片式散热器(105)的一侧与驱动设备(106)连接，所述基板(104)为圆盘型，所述反射层(103)、发光层(102)以及透明金刚石膜层(101)均为圆环形。The wavelength conversion device according to claim 5, wherein a side of the substrate (104) provided with a fin heat sink (105) is connected to a driving device (106), and the substrate (104) is round Disk-shaped, the reflective layer (103), light-emitting layer (102), and transparent diamond film layer (101) are all circular rings.
  7. 如权利要求1所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)设置在所述基板(104)远离反射层(103)的一侧。The wavelength conversion device according to claim 1, wherein the transparent diamond film layer (101) is disposed on a side of the substrate (104) away from the reflective layer (103).
  8. 如权利要求7所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)还设置在发光层(102)远离反射层(103)的一侧，以及基板(104)与反射层(103)之间。The wavelength conversion device according to claim 7, wherein the transparent diamond film layer (101) is further disposed on a side of the light emitting layer (102) away from the reflective layer (103), and the substrate (104) and the reflective layer (103).
  9. 如权利要求1所述的波长转换装置，其特征在于，所述发光层(102)的厚度为0μm-500μm。The wavelength conversion device according to claim 1, wherein a thickness of the light emitting layer (102) is 0 μm to 500 μm.
  10. 如权利要求1所述的波长转换装置，其特征在于，所述透明金刚石膜层(101)的膜层厚度为0μm-50μm。The wavelength conversion device according to claim 1, wherein a thickness of the transparent diamond film layer (101) is 0 μm to 50 μm.
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