WO2021037225A1 - 光源系统及照明装置 - Google Patents

光源系统及照明装置 Download PDF

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Publication number
WO2021037225A1
WO2021037225A1 PCT/CN2020/112197 CN2020112197W WO2021037225A1 WO 2021037225 A1 WO2021037225 A1 WO 2021037225A1 CN 2020112197 W CN2020112197 W CN 2020112197W WO 2021037225 A1 WO2021037225 A1 WO 2021037225A1
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Prior art keywords
excitation light
light source
wavelength conversion
material layer
light
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PCT/CN2020/112197
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English (en)
French (fr)
Inventor
李乾
陈雨叁
王艳刚
Original Assignee
深圳市中光工业技术研究院
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Priority to EP20858167.8A priority Critical patent/EP4006404A4/en
Publication of WO2021037225A1 publication Critical patent/WO2021037225A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H01S5/0087—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/20—Combination of light sources of different form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the present invention relates to the field of optical technology, in particular to a light source system and a lighting device using the light source system.
  • a blue laser is usually used to excite a yellow fluorescent material layer to generate yellow fluorescence, and the yellow fluorescence is combined with the blue laser to generate white light.
  • spot diffusion phenomenon when the laser beam is gathered into a spot to irradiate the surface of the fluorescent material layer, that is, the phenomenon that the area A'of the light-emitting spot after excitation is larger than the actual area A of the excitation spot. In the field of lighting applications, this diffusion phenomenon will cause the "yellow circle” problem on the edge of the finally projected white light beam spot, which seriously affects the color uniformity of the spot.
  • uniform light optical elements such as a fly-eye lens or a square rod are usually used as an aid to shape and uniform light the emitted white light spot, so that the color of the projected white light is uniform.
  • a fly-eye lens or a square rod complicates the design of the light path, which not only increases the volume and cost of the light source, but also reduces the light collection efficiency of the light source.
  • One aspect of the present invention provides a light source system, including:
  • the first excitation light source is used to emit the first excitation light
  • the wavelength conversion structure includes a wavelength conversion material layer for receiving the first excitation light and converting at least part of the first excitation light into the first laser light to be emitted, and the side of the wavelength conversion material layer opposite to the incident surface of the first excitation light Defined with a transmissive area and a non-transmissive area surrounded by the transmissive area; and
  • the second excitation light source is arranged on the side of the wavelength conversion structure away from the incident surface of the first excitation light, and is used to emit the second excitation light.
  • the second excitation light enters the wavelength conversion material layer from the transmission area, and the wavelength conversion material layer will be at least Part of the second excitation light is converted into the second received laser light and then emitted, and transmits part of the second excitation light that is not absorbed by the wavelength conversion material layer.
  • Another aspect of the present invention provides a lighting device including the light source system as described above.
  • a first excitation light source and a second excitation light source are respectively arranged on both sides of the wavelength conversion material layer, and a non-transmissive area and a non-transmissive area are provided on the surface of the first excitation light source close to the second excitation light source.
  • the second excitation light emitted by the second excitation light source is only incident on the wavelength conversion material layer from the transmission area, that is, the second excitation light is only incident from the edge area of the wavelength conversion material layer, and is part of the wavelength conversion material layer.
  • the unconverted second excitation light and the converted second laser light are emitted from the edge area of the surface of the wavelength conversion material layer away from the second excitation light source, which makes up for the lack of laser content in the edge area. , Which is beneficial to improve the halo problem caused by the first excitation light source, and improves the color uniformity of the light source light emitted by the light source system.
  • Fig. 1 is a schematic structural diagram of a light source system provided by an embodiment of the present invention.
  • Fig. 2 is a schematic structural diagram of a wavelength conversion structure provided by an embodiment of the present invention.
  • Fig. 3 is a side view of the wavelength conversion material layer and the reflective layer in Fig. 2.
  • Fig. 4 is a top view of the wavelength conversion material layer in Fig. 2.
  • Light source system 10 First excitation light source 11 Second excitation light source 12 Substrate 121
  • Non-transmissive area B Light guide element 14 Central region 141 Surrounding area 142 First lens 15 Second lens 16
  • the light source system 10 includes a first excitation light source 11, a second excitation light source 12, and a wavelength conversion structure 13.
  • the first excitation light source 11 and the second excitation light source 12 are respectively located in the wavelength conversion structure 13 On both sides.
  • the first excitation light source 11 is used to emit the first excitation light.
  • the first excitation light source 11 is a laser or a laser array, that is, the first excitation light is a laser.
  • the second excitation light source 12 includes a substrate 121, a light emitting device 122 disposed between the substrate 121 and the wavelength conversion structure 13, and wires 123 for electrically connecting the substrate 121 and the light emitting device 122 respectively.
  • the substrate 121 is used to carry the light-emitting device 122.
  • the substrate 121 is a copper sheet with a smooth surface.
  • the substrate 121 may also be made of other materials, such as aluminum, AlN ceramic, etc.
  • the present invention does not limit the material of the substrate 121.
  • the light emitting device 122 is used for emitting the second excitation light.
  • the light emitting device 122 is a light emitting diode (Light Emitting Diode, LED) chip for emitting blue light with a wavelength between 440 and 445 nm (that is, the first light emitting diode). One excitation light).
  • the light-emitting device 122 is an LED chip group including a plurality of array LED chips, and the plurality of LED chips emit the second excitation light of the same color.
  • the light-emitting device 122 has an electrode (not shown), and the wire 123 is used to electrically connect the electrode of the light-emitting device 122 with the substrate 121.
  • the wire 123 is a gold wire.
  • the wavelength conversion structure 13 includes a wavelength conversion material layer 131.
  • the wavelength conversion material layer 131 is used to receive the first excitation light emitted by the first excitation light source 11 and convert at least part of the first excitation light into the first laser light to be emitted.
  • the wavelength conversion material layer 131 is a fluorescent ceramic layer, and when receiving the first excitation light, it is used to convert at least part of the first excitation light into fluorescence for emission.
  • the first excitation light is a blue laser
  • the fluorescent ceramic layer contains a yellow fluorescent substance. When receiving the blue laser, it is excited to emit yellow fluorescence, and the wavelength of the yellow fluorescence is between 460-700 nm.
  • a surface of the wavelength conversion material layer 131 opposite to the incident surface of the first excitation light defines a transmission area A and a non-transmission area B surrounded by the transmission area A.
  • the second excitation light emitted by the light-emitting device 122 can be incident from the transmission area A into the wavelength conversion material layer 131, and the wavelength conversion material layer 131 converts at least part of the incident second excitation light into a second received laser light, while the transmission is not converted. Part of the second excitation light.
  • the non-transmissive area B is provided with a reflective layer 132, and the reflective layer 132 is used to block the second excitation light from entering the wavelength conversion material layer 131 from the non-transmissive area B, and remove part of the second excitation light that is not absorbed by the wavelength conversion material layer 131 Reflect out.
  • the reflective layer 132 may be formed by including but not limited to the following two methods:
  • Method one forming a diffuse reflection layer: mixing one or more of white reflective powder aluminum oxide, titanium dioxide, zirconium oxide, magnesium oxide, and zinc oxide with silica gel, and then dispensing and coating on the surface of the fluorescent ceramic to be cured. Or use magnetron sputtering and use a mask to achieve regional plating of metal oxide reflective film layers, such as aluminum oxide, titanium oxide, silicon oxide, calcium oxide, etc.; the shape of the diffuse reflective layer can be square, round or regular Polygon etc.;
  • the second method is to use magnetron sputtering or vacuum evaporation method to realize the regional coating layer on the non-transmissive area B by using a mask.
  • the above-mentioned film layer is a metal layer with light reflection effect, such as silver, aluminum, etc., the film layer
  • the shape of can be square, round or regular polygon and so on.
  • the reflective layer 132 has a thinner coating and is beneficial to release energy (in this embodiment, it mainly refers to the light energy generated by the second excitation light source 12), avoiding the accumulation of energy and converting it into higher heat, thereby reducing the wavelength conversion structure 13 work efficiency.
  • the surface of the wavelength conversion material layer 131 close to the second excitation light source 12 is rectangular, the non-transmissive area B is located in the central area of the rectangle, which is also a rectangle, and the transmission area A is located in the edge area surrounding the non-transmissive area;
  • the surface of the wavelength conversion material layer 131 close to the second excitation light source 12 may have other shapes, and the shape of the non-transmissive area B is not necessarily the same as the surface shape of the wavelength conversion material layer 131 close to the second excitation light source 12, but
  • the wavelength conversion material layer 131 is located near the central area of the surface of the second excitation light source 12, and the reflective layer 132 is disposed in the central area of the surface of the wavelength conversion material layer 131 facing the second excitation light source 12.
  • the second received laser light and the unconverted part of the second excitation light are jointly emitted from the surface of the wavelength conversion material layer 131 away from the second excitation light source 12.
  • the second laser light is fluorescent
  • the LED chip emits blue light (that is, the second excitation light is blue light)
  • the wavelength conversion material layer 131 is a yellow fluorescent material
  • the blue second excitation light excites the fluorescent material to produce Yellow fluorescence
  • the wavelength of yellow fluorescence is between 460-700nm.
  • the wavelength conversion structure 13 further includes a transparent adhesive material layer 133 disposed between the second excitation light source 12 and the wavelength conversion material layer 131 for bonding the light emitting device 122 and the wavelength conversion material layer 131 ⁇ Reflective layer 132.
  • the transparent adhesive material layer 133 includes silica gel.
  • the silica gel uses a high refractive index silicone glue with a refractive index of 1.51, so that the transmittance of light (blue light) with a wavelength of between 420 and 460 nm is above 95%; and the silica gel requires
  • the silica gel with higher heat resistance is selected, and the specific heat resistance requirements are: it can maintain continuous and stable operation for more than a preset time in a working environment within 200°C.
  • the preset time mentioned above is determined according to the actual application scenario of the wavelength conversion structure 13.
  • the transparent adhesive material layer 133 may be coated on the surface of the light emitting device 122 first, and then the wavelength conversion material layer 131 is adhered to the transparent adhesive material layer 133.
  • the light source system 10 further includes a light guiding element 14.
  • the light guiding element 14 is a regional coating sheet.
  • the light guiding element 14 is arranged on the propagation path of the first excitation light emitted by the first excitation light source 11, and is used for guiding the first excitation light emitted by the first excitation light source 11 to the wavelength conversion structure 13, specifically, for guiding the first excitation light
  • the first excitation light emitted by an excitation light source 11 is guided to a side of the wavelength conversion material layer 131 away from the second excitation light source 12.
  • the area coating sheet 22 includes a central area 141 and a peripheral area 142 surrounding the central area 141, and the central area 141 is a dichroic area.
  • the first excitation light source 11 When the first excitation light source 11 is turned on, the first excitation light is incident on the central area 141 and is reflected by the dichroic area to the wavelength conversion material layer 131.
  • the first excitation light is partially absorbed by the wavelength conversion material layer 131 to excite the wavelength conversion material layer.
  • the fluorescent substance in 131 generates fluorescence, and the unabsorbed part of the combined light of the first excitation light and the generated fluorescence is emitted from the wavelength conversion material layer 131 and then transmitted from the peripheral area 142 of the light guiding element 14.
  • the light source system 10 further includes a collecting lens disposed between the wavelength conversion structure 13 and the light guiding element 14, including a first lens 15 and a second lens 16, and both the first lens 15 and the second lens 16 are condenser lenses.
  • the optical lens, the first lens 15 and the second lens 16 are used together to condense the light emitted from the wavelength conversion structure 13 diverging in the propagation direction into parallel light and enter the light guide element 14.
  • only the first lens 15 may be included, and in another embodiment, it may also include a third lens, a fourth lens and more structures for condensing light.
  • the working mode of the light source system 10 provided in this embodiment is described below:
  • the first excitation light source 11 emits the first excitation light
  • the first excitation light is incident on the central area 141 of the light guide element 14, and the central area 141 reflects the first excitation light to the wavelength conversion material layer 131, partly
  • the first excitation light is absorbed by the wavelength conversion material layer 131, and is incident from the surface of the wavelength conversion material layer 131 away from the second excitation light source 12, and the fluorescent substance in the excitation wavelength conversion material layer 131 is converted to generate the first laser light.
  • a received laser light is emitted from the surface of the wavelength conversion material layer 131 away from the second excitation light source 12, and the unabsorbed part of the first excitation light is reflected by the surface of the wavelength conversion material layer 131 away from the second excitation light source 12.
  • the unconverted part of the combined light of the first excitation light is emitted from the surface of the wavelength conversion material layer 131 away from the second excitation light source 12.
  • the first excitation light is a 445 nm blue laser
  • the first received laser light is a yellow fluorescence with a wavelength between 460-700 nm.
  • the first excitation light is laser light
  • the first received laser is yellow fluorescence.
  • the combined light of the yellow fluorescence and the unconverted blue laser is white light.
  • the edge area of the white light will produce yellow halo, resulting in yellow light.
  • the overall color uniformity of the combined light of the fluorescence and the unconverted blue laser is poor.
  • the second excitation light source 12 is turned on at the same time, that is, the light-emitting device 122 is turned on, and the light-emitting device 122 emits the second excitation.
  • the second excitation light is incident from the surface of the wavelength conversion material layer 131 away from the first excitation light source 11.
  • the surface of the wavelength conversion material layer 131 away from the first excitation light source 11 defines a non-transmissive area B located in the central area and a transmissive area A located in the edge area and surrounding the non-transmissive area B.
  • the non-transmissive area B is provided with a reflective layer 132.
  • the second excitation light enters the non-transmissive area B, it is blocked and reflected by the reflective layer 132 and cannot enter the wavelength conversion material layer 131;
  • the second excitation light enters the transmission area A, it enters from the edge area of the wavelength conversion material layer 131, Part of the incident second excitation light excites the fluorescent substance in the wavelength conversion material layer 131 to generate second laser light, and the unconverted part of the second excitation light is away from the edge of the surface of the second excitation light source 12 from the wavelength conversion material layer 131 The area shoots out.
  • the second excitation light is blue light with a wavelength between 440 and 445 nm
  • the second laser light is yellow fluorescence with a wavelength between 460 and 700 nm.
  • the unconverted second excitation light exits from the edge area of the surface of the wavelength conversion material layer 131 away from the second excitation light source 12, it compensates for the combined light edge area of the first received laser light and the unconverted part of the first excitation light.
  • the insufficient content is conducive to solving the problem of halos in the edge area of the combined light of the first received laser light and the unconverted part of the first excitation light.
  • the combined light of the first received laser light, the second received laser light, the unconverted part of the first excitation light and the unconverted part of the second excitation light is emitted from the surface of the wavelength conversion material layer 131 away from the second excitation light source 12 as a light source.
  • the light from the light source is white, and through the condensing action of the first lens 15 and the second lens 16, a parallel light beam is formed and transmitted from the peripheral area 142 of the light guide element 14.
  • the first excitation light source 11 and the second excitation light source 12 are respectively arranged on both sides of the wavelength conversion material layer 131, and the first excitation light source 11 is close to the center of the surface of the second excitation light source 12
  • the region is provided with a non-transmissive area B and a transmission area A surrounding the non-transmissive area B, so that the second excitation light emitted by the second excitation light source 12 only enters the wavelength conversion material layer 131 from the transmission area A, that is, the second excitation light only comes from
  • the edge region of the wavelength conversion material layer 131 is incident and is partially converted by the wavelength conversion material layer 131 into the second laser light.
  • the unconverted second excitation light and the converted second laser light are far away from the wavelength conversion material layer 131 from the second excitation light.
  • the present invention also provides a lighting device, which includes the light source system 10 as described above.

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  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
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  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种光源系统（10），包括：第一激发光源（11），用于发射第一激发光；波长转换结构（13），包括用于接收第一激发光并将至少部分第一激发光转换成第一受激光后出射的波长转换材料层（131），波长转换材料层（131）的与第一激发光的入射面相对的一面定义有透射区（A）和被透射区（A）包围的非透射区（B）；及第二激发光源（12），设置于波长转换结构（13）的远离第一激发光的入射面一侧，用于发射第二激发光，第二激发光从透射区（A）入射至波长转换材料层（131），波长转换材料层（131）将至少部分第二激发光转换为第二受激光后出射，并透射未被波长转换材料层（131）吸收的部分第二激发光。一种照明装置，包括光源系统（10）。

Description

光源系统及照明装置 技术领域
本发明涉及光学技术领域，尤其涉及一种光源系统及应用该光源系统的照明装置。
背景技术
在激光远程激发荧光粉技术的照明领域中，通常利用蓝色激光激发黄色荧光材料层产生黄色荧光，黄色荧光再与蓝色激光合光产生白光。由于激光束聚集成光斑照射在荧光材料层表面时存在“光斑扩散现象”，即激发后发光光斑面积A'大于激发光斑的实际面积A的现象。在照明应用领域，这种扩散现象会使得最终投射出来的白光光束光斑的边缘出现“黄圈”问题，严重影响了光斑颜色均匀性。
目前，通常采用复眼透镜或方棒等匀光光学元件作辅助，对出射的白光光斑进行整形匀光，使得投射的白光颜色均匀。但是复眼透镜或方棒等元件的引入，使光路设计变得复杂，不仅会增加光源的体积和成本，还会降低光源的光收集效率。
发明内容
本发明一方面提供一种光源系统，包括：
第一激发光源，用于发射第一激发光；
波长转换结构，包括用于接收第一激发光并将至少部分第一激发光转换成第一受激光后出射的波长转换材料层，波长转换材料层的与第一激发光的入射面相对的一面定义有透射区和被透射区包围的非透射区；及
第二激发光源，设置于波长转换结构的远离第一激发光的入射面一侧，用于发射第二激发光，第二激发光从透射区入射至波长转换材料层，波长转换材料层将至少部分第二激发光转换为第二受激光后出 射，并透射未被波长转换材料层吸收的部分第二激发光。
本发明另一方面提供一种照明装置，包括如上述的光源系统。
本实施例提供的光源系统，通过在波长转换材料层的两侧分别设置第一激发光源和第二激发光源，并在第一激发光源靠近第二激发光源的表面设置非透射区和包围非透射区的透射区，使得第二激发光源出射的第二激发光仅从透射区入射至波长转换材料层，也即第二激发光仅从波长转换材料层的边缘区域入射，被波长转换材料层部分转换为第二受激光，未被转换的第二激发光和转化产生的第二受激光从波长转换材料层远离第二激发光源的表面的边缘区域出射，弥补了边缘区域激光含量偏少的不足，有利于改善第一激发光源引起的光晕问题，提高了光源系统出射的光源光的颜色均匀度。
附图说明
图1是本发明实施例提供的光源系统的结构示意图。
图2是本发明实施例提供的波长转换结构的结构示意图。
图3是图2中的波长转换材料层和反射层的侧视图。
图4是图2中的波长转换材料层的俯视图。
主要元件符号说明
光源系统 10
第一激发光源 11
第二激发光源 12
基板 121
发光器件 122
导线 123
波长转换结构 13
波长转换材料层 131
反射层 132
透明粘接材料层 133
透射区 A
非透射区 B
光引导元件 14
中心区域 141
周边区域 142
第一透镜 15
第二透镜 16
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
实施例一
请参阅图1，本实施例提供的光源系统10，包括第一激发光源11、第二激发光源12及波长转换结构13，第一激发光源11和第二激发光源12分别位于波长转换结构13的两侧。
第一激发光源11用于发射第一激发光，本实施例中，第一激发光源11为激光器或激光器阵列，即第一激发光为激光。
请参阅图2，第二激发光源12包括基板121、设置于基板121与波长转换结构13之间的发光器件122以及用于分别电连接基板121与发光器件122的导线123。
其中，基板121用于承载发光器件122。本实施例中，基板121为一表面光滑的铜片，于其他实施例中，基板121也可以为其他材料构成，例如铝、AlN陶瓷等，本发明不对基板121的材质作限定。发光器件122用于发射第二激发光，本实施例中，发光器件122为一颗发光二极管(Light Emitting Diode，LED)芯片，用于发出波长在440～445nm之间的蓝色光(也即第一激发光)。于其他实施例中，发光器件122为一LED芯片组，包括多颗阵列LED芯片，多颗LED芯片发同样颜色的第二激发光。发光器件122具有一电极(图未示)，导线123用于将发光器件122电极与基板121电连接，本实施例中，导线123为金线。
请继续参阅图2，波长转换结构13包括波长转换材料层131。波长转换材料层131用于接收第一激发光源11发射的第一激发光并将至 少部分第一激发光转换成第一受激光后出射。本实施例中，波长转换材料层131为荧光陶瓷层，接收到第一激发光时，用于将至少部分第一激发光转换成荧光出射。本实施例中，第一激发光为蓝色激光，荧光陶瓷层中包含黄色荧光物质，接收到蓝色激光时受激激发，出射黄色荧光，黄色荧光波长在460-700nm之间。
请同时参阅图3和图4，波长转换材料层131的与第一激发光的入射面相对的一面定义有透射区A和被透射区A包围的非透射区B。发光器件122发射的第二激发光可从透射区A入射至波长转换材料层131中，波长转换材料层131将入射的至少部分第二激发光转换为第二受激光出射，同时透射未被转换的部分第二激发光。
而非透射区B设置有反射层132，反射层132用于阻挡第二激发光从非透射区B入射至波长转换材料层131中，将未被波长转换材料层131吸收的部分第二激发光反射出去。具体的，反射层132可以通过包括但不仅限于以下两种方式形成：
方式一，形成漫反射层：采用白色反射粉氧化铝、二氧化钛、氧化锆、氧化镁、氧化锌中的一种或多种与硅胶混合，再点胶涂覆在荧光陶瓷表面上固化形成。或者采用磁控溅射，利用掩膜实现区域镀制金属氧化物反射膜层，如：氧化铝、氧化钛、氧化硅、氧化钙等；该漫反射层的形状可以是方形、圆形或正多边形等；
方式二，采用磁控溅射或真空蒸镀的方式，在非透射区B上利用掩膜实现区域镀膜层，上述膜层为具有光反射作用的金属层，如银、铝等，该膜层的形状可以是方形、圆形或正多边形等。
本实施例中，反射层132镀层较薄，且有利于释放能量(本实施例中主要指第二激发光源12产生的光能)，避免能量积累转换成较高的热量，从而降低波长转换结构13的工作效率。
本实施例中，波长转换材料层131靠近第二激发光源12的表面为矩形，非透射区B位于矩形的中心区域，也为一矩形，透射区A则位于包围非透射区域的边缘区域；于其他实施例中，波长转换材料层131靠近第二激发光源12的表面可为其他形状，非透射区B的形状并不一定与波长转换材料层131靠近第二激发光源12的表面形状相同，但 优选位于波长转换材料层131靠近发第二激发光源12的表面的中心区域，则反射层132设置在波长转换材料层131朝向第二激发光源12的表面的中心区域。
第二受激光与未被转换的部分第二激发光共同从波长转换材料层131远离第二激发光源12的表面出射。本实施例中，第二受激光为荧光，LED芯片发蓝色光(即第二激发光为蓝色光)、波长转换材料层131中为黄色荧光物质，蓝色的第二激发光激发荧光物质产生黄色荧光，黄色荧光波长在460-700nm之间。
进一步的，本实施例中，波长转换结构13还包括设置于第二激发光源12与波长转换材料层131之间的透明粘接材料层133，用于粘合发光器件122与波长转换材料层131和反射层132。其中，透明粘接材料层133包括硅胶，硅胶采用折射率为1.51的高折射率硅树脂胶水，使得波长在420～460nm之间的光(蓝光)的透过率在95％以上；并且硅胶需选用耐热性较高的硅胶，具体耐热性要求为：在200℃以内的工作环境中能保持连续稳定工作超过预设时长，上述的预设时长根据波长转换结构13的实际应用场景确定。在波长转换结构13的制程中，可以采用将透明粘接材料层133先涂覆于发光器件122的表面，再将波长转换材料层131粘附于透明粘接材料层133的方式。
请再参考图1，光源系统10还包括光引导元件14，本实施例中，光引导元件14为区域镀膜片。光引导元件14设置于第一激发光源11出射的第一激发光的传播路径上，用于将第一激发光源11出射的第一激发光引导至波长转换结构13，具体的，用于将第一激发光源11出射的第一激发光引导至波长转换材料层131远离第二激发光源12的一侧。
进一步的，区域镀膜片22包括中心区域141和包围中心区域141的周边区域142，中心区域141为二向色区域。当第一激发光源11开启时，第一激发光入射至中心区域141，被二向色区域反射至波长转换材料层131，第一激发光部分被波长转换材料层131吸收，激发波长转换材料层131中的荧光物质，产生荧光，未被吸收的部分第一激发光与产生的荧光的合光从波长转换材料层131出射，进而从光引导 元件14的周边区域142透射出去。
请继续参考图1，光源系统10还包括设置于波长转换结构13和光引导元件14之间的收集透镜，包括第一透镜15和第二透镜16，第一透镜15和第二透镜16皆为聚光透镜，第一透镜15和第二透镜16共同用于将波长转换结构13出射的传播方向发散的光聚集成平行光入射至光引导元件14。于其他实施例中，也可仅包括第一透镜15，于另一实施例中，也可包括第三透镜、第四透镜等更多的用于聚光的结构。
以下对本实施例提供的光源系统10的工作方式进行说明：
开启第一激发光源11，第一激发光源11出射第一激发光，第一激发光入射至光引导元件14的中心区域141，中心区域141将第一激发光反射至波长转换材料层131，部分第一激发光被波长转换材料层131吸收，从波长转换材料层131远离第二激发光源12的表面入射，激发波长转换材料层131中的荧光物质，被转换产生第一受激光，产生的第一受激光从波长转换材料层131远离第二激发光源12的表面出射，未被吸收的部分第一激发光被波长转换材料层131远离第二激发光源12的表面反射，则第一受激光与未被转换的部分第一激发光的合光从波长转换材料层131远离第二激发光源12的表面出射。本实施例中，第一激发光为445nm的蓝色激光，第一受激光为波长在460-700nm之间的黄色荧光。
由于第一激发光为激光，在入射至波长转换材料层131时，会产生激光光斑，激光光斑的强度分布规律为：中间强，向外部逐渐减弱。则导致光斑中间区域激光含量占比偏高，边缘区域占比偏少，使得波长转换材料层131出射的第一受激光与未被转换的部分第一激发光的合光的边缘区域会呈现与第一受激光同色的光晕。本实施例中，第一激发光为蓝色激光，第一受激光为黄色荧光，黄色荧光和未被转换的蓝色激光的合光为白光，白光的边缘区域会产生黄色光晕，导致黄色荧光和未被转换的蓝色激光的合光的整体颜色均匀度较差。
因此本实施例的光源系统10中，为了有利于消除上述的光晕，开启第一激发光源11时，同时开启第二激发光源12，也即点亮发光器 件122，发光器件122出射第二激发光，第二激发光从波长转换材料层131远离第一激发光源11的表面入射。具体的，波长转换材料层131远离第一激发光源11的表面定义有位于中心区域的非透射区B和位于边缘区域、围绕非透射区B的透射区A，非透射区B设置有反射层132，第二激发光入射至非透射区B时，被反射层132阻挡反射，无法进入波长转换材料层131；第二激发光入射至透射区A时，从波长转换材料层131的边缘区域入射，部分入射的第二激发光激发波长转换材料层131中的荧光物质，产生第二受激光，未被转换的部分第二激发光则从波长转换材料层131远离第二激发光源12的表面的边缘区域出射。本实施例中，第二激发光为波长在440～445nm之间的蓝色光，第二受激光为波长在460-700nm的黄色荧光。
由于未被转换的第二激发光从波长转换材料层131远离第二激发光源12的表面的边缘区域出射，弥补了第一受激光与未被转换的部分第一激发光的合光边缘区域激光含量偏少的不足，有利于解决第一受激光与未被转换的部分第一激发光的合光边缘区域出现光晕的问题。
第一受激光、第二受激光、未被转换的部分第一激发光及未被转换的部分第二激发光的合光作为光源光从波长转换材料层131远离第二激发光源12的表面出射，本实施例中，光源光为白色，经过第一透镜15及第二透镜16的聚光作用，形成平行光束从光引导元件14的周边区域142透射出去。
本实施例提供的光源系统10，通过在波长转换材料层131的两侧分别设置第一激发光源11和第二激发光源12，并在第一激发光源11靠近第二激发光源12的表面的中心区域设置非透射区B和包围非透射区B的透射区A，使得第二激发光源12出射的第二激发光仅从透射区A入射至波长转换材料层131，也即第二激发光仅从波长转换材料层131的边缘区域入射，被波长转换材料层131部分转换为第二受激光，未被转换的第二激发光和转化产生的第二受激光从波长转换材料层131远离第二激发光源12的表面的边缘区域出射，弥补了边缘区域激光含量偏少的不足，有利于改善第一激发光源11引起的光晕问题，提高了光源系统10出射的光源光的颜色均匀度。
本发明还提供一种照明装置，该照明装置包括如上述的光源系统10。
照明应当理解，本实施例中的照明装置，可以实现如上述的所有有益效果。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种光源系统，其特征在于，包括：
    第一激发光源，用于发射第一激发光；
    波长转换结构，包括用于接收所述第一激发光并将至少部分所述第一激发光转换成第一受激光后出射的波长转换材料层，所述波长转换材料层的与所述第一激发光的入射面相对的一面定义有透射区和被所述透射区包围的非透射区；及
    第二激发光源，设置于所述波长转换结构的远离所述第一激发光的入射面一侧，用于发射第二激发光，所述第二激发光从所述透射区入射至所述波长转换材料层，所述波长转换材料层将至少部分所述第二激发光转换为第二受激光后出射，并透射未被所述波长转换材料层吸收的部分所述第二激发光。
  2. 如权利要求1所述的光源系统，其特征在于，所述第二激发光源包括：
    基板；
    发光器件，设置于所述基板与所述波长转换结构之间，用于发射所述第二激发光；及
    导线，用于分别电连接所述基板与所述发光器件。
  3. 如权利要求1所述的光源系统，其特征在于，所述非透射区设有反射层，所述反射层用于阻挡所述第二激发光从所述非透射区入射至所述波长转换层，还用于反射未被所述波长转换材料层吸收的部分所述第一激发光。
  4. 如权利要求3所述的光源系统，其特征在于，所述反射层为漫反射层。
  5. 如权利要求3所述的光源系统，其特征在于，所述反射层为金属反射层。
  6. 如权利要求1所述的光源系统，其特征在于，所述波长转换结构还包括设置于所述第二激发光源和所述波长转换材料层之间的透明粘接材料层。
  7. 如权利要求1所述的光源系统，其特征在于，还包括光引导元件，设置于所述第一激发光源与所述波长转换结构之间的光路上；
    所述光引导元件包括中心区域和包围所述中心区域的周边区域，所述中心区域用于反射所述第一激发光源出射的所述第一激发光，使所述第一激发光入射所述波长转换材料层，所述周边区域为透射区域。
  8. 如权利要求7所述的光源系统，其特征在于，所述光引导元件为区域镀膜片，所述中心区域为二向色区域。
  9. 如权利要求7所述的光源系统，其特征在于，还包括位于所述波长转换结构和所述光引导元件之间的收集透镜。
  10. 一种照明装置，其特征在于，包括如权利要求1-9任意一项所述的光源系统。
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