WO2019128079A1 - 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
WO2019128079A1
WO2019128079A1 PCT/CN2018/088524 CN2018088524W WO2019128079A1 WO 2019128079 A1 WO2019128079 A1 WO 2019128079A1 CN 2018088524 W CN2018088524 W CN 2018088524W WO 2019128079 A1 WO2019128079 A1 WO 2019128079A1
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WIPO (PCT)
Prior art keywords
light
light source
source system
laser
wavelength conversion
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Ceased
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PCT/CN2018/088524
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English (en)
French (fr)
Inventor
胡飞
余新
周萌
李屹
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YLX Inc
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YLX Inc
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Publication date
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Priority to EP18895195.8A priority Critical patent/EP3734673B1/en
Priority to US16/958,342 priority patent/US11098886B2/en
Publication of WO2019128079A1 publication Critical patent/WO2019128079A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/10—Arrangement of heat-generating components to reduce thermal damage, e.g. by distancing heat-generating components from other components to be protected
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/05—Optical design plane
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/12—Beam splitting or combining systems operating by refraction only
    • G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • 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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • H01S5/02476—Heat spreaders, i.e. improving heat flow between laser chip and heat dissipating elements
    • 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
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4031—Edge-emitting structures
    • H01S5/4056—Edge-emitting structures emitting light in more than one direction
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/10—Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
    • 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
    • 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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02255—Out-coupling of light using beam deflecting elements
    • 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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02257—Out-coupling of light using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing

Definitions

  • the present invention relates to the field of light source technologies, and in particular, to a light source system and a lighting device.
  • solid-state light sources used in the field of illumination use blue lasers and phosphors to achieve white light output.
  • Blue lasers operate at high drive power densities, resulting in higher luminous flux.
  • a light source using a blue laser can obtain a brightness that is several times higher than that of an LED.
  • blue lasers have inherent advantages as a light source.
  • the invention provides a light source system and a lighting device capable of solving the problem of heat dissipation of an internal laser and a wavelength conversion layer.
  • a light source system comprising:
  • At least one laser for emitting excitation light At least one laser for emitting excitation light
  • a substrate made of a highly thermally conductive material the substrate being provided with a recess, the laser being received in a sidewall of the recess;
  • a wavelength conversion layer disposed on a portion of the surface of the reflective layer for wavelength conversion of the excitation light to obtain a laser beam
  • a light guiding member covering the opening of the groove for guiding the excitation light and the received laser light to obtain light source light emitted by the light source system.
  • a lighting device comprising a light source system as described above.
  • the present invention provides a light source system and an illumination device including the same, wherein the substrate in the light source system is made of a highly thermally conductive material, the laser is housed in a substrate, and heat of the wavelength conversion layer passes through the reflection Passing the layer to the substrate, thereby solving the heat dissipation problem of the laser and the wavelength conversion layer in the light source system, and further, since the laser and the wavelength conversion layer are located in the same groove, the light source system and The lighting device is small in size and simple in structure.
  • FIG. 1 is a schematic perspective structural view of a light source system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the light source system shown in FIG. 1 taken along line II-II.
  • FIG. 3 is a schematic top plan view of the light source system shown in FIG. 2.
  • FIG. 4 is a cross-sectional structural view of a light source system according to a second embodiment of the present invention.
  • FIG. 5 is a schematic top plan view of the light source system shown in FIG. 4.
  • FIG. 5 is a schematic top plan view of the light source system shown in FIG. 4.
  • Figure 6 is a schematic view of a spot on the wavelength conversion layer as shown in Figure 4.
  • FIG. 7 is a cross-sectional structural view of a light source system according to a third embodiment of the present invention.
  • FIG. 1 is a schematic perspective view of a light source system 100 according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the light source system 100 shown in FIG.
  • FIG. 3 is a schematic top plan view of the light source system 100 shown in FIG. 2.
  • the light source system 100 provided by the embodiment of the present invention includes a base 110, a light guiding element 120, a laser 130, a beam deflecting device 140, a wavelength conversion layer 150, and a reflective layer 160.
  • the light source system 100 in the present embodiment includes at least one laser 130 for emitting excitation light.
  • the base 110 is made of a highly thermally conductive material, which may be aluminum nitride, silicon nitride, silicon carbide, boron nitride, or metallic copper, aluminum, or the like.
  • the base 110 is provided with a recess 111 in which the laser 130 is housed in the side wall of the recess 111 to solve the heat dissipation problem of the laser 130.
  • the laser 130 and the wavelength conversion layer 150 are located in the same groove 111.
  • the illumination device of the light source system 100 and the application light source system 100 is small in size and simple in structure.
  • the beam deflecting device 140 is disposed in one-to-one correspondence with the laser 130, and the beam deflecting device 140 is configured to guide the excitation light emitted from the corresponding laser 130 to the wavelength conversion layer 150.
  • the beam deflecting device 140 can be a prism, an aspheric lens, a freeform surface, a mirror, and the like.
  • the reflective layer 160 may be a diffuse reflection layer or a metal reflective layer covering the groove wall of the groove 111 for reflecting light to improve the light extraction efficiency of the light source system 100.
  • the wavelength conversion layer 150 is disposed on a portion of the surface of the reflective layer 160 for wavelength conversion of the excitation light to obtain a laser beam.
  • the wavelength conversion layer 150 transfers heat to the substrate 110 through the reflective layer 160, and dissipates heat through the substrate 110. Thereby solving the heat dissipation problem of the wavelength conversion layer 150.
  • the light guiding member 120 covers the opening of the groove 111 for reflecting the excitation light and transmitting the received laser light, and the received laser light is emitted from the light guiding member 120 to obtain the light source light emitted from the light source system 100.
  • the substrate 110 of the light source system 100 is made of a highly thermally conductive material, and the laser 130 is housed in the groove wall of the substrate 110.
  • the heat generated by the wavelength conversion layer 150 is transmitted to the substrate 110 through the reflective layer 160, thereby solving the laser 130 in the light source system.
  • the heat dissipation problem of the wavelength conversion layer 150 is made of a highly thermally conductive material, and the laser 130 is housed in the groove wall of the substrate 110.
  • the light source system 100 employs a laser 130, and the laser 130 and the wavelength conversion layer 150 are housed in the groove 111 of the same base 110.
  • the light source system 100 has high light output and small volume.
  • the light source system 100 can also be applied to a lighting device.
  • the lighting device provided by the embodiments of the present invention may be in the fields of an automobile lamp device, a stage lamp, and a laser headlight.
  • the light source system 100 includes four identical lasers 130.
  • the laser 130 can be a blue laser that emits blue excitation light. It is to be understood that the laser 130 is not limited to a blue laser, and the laser 130 may be an ultraviolet laser, a red laser, or a green laser. It can be understood that the light source system 100 can include one, two blue lasers or a blue laser array. Specifically, the number of lasers 130 can be selected according to actual needs.
  • the groove 111 has a prismatic shape, and the groove wall of the groove 111 includes four side walls 111a and one bottom wall 111b.
  • the laser 130 is exposed on the surface of the substrate 110, and any two lasers 130 are housed in different side walls 111a of the recess 111.
  • Each beam deflecting device 140 is disposed between its corresponding laser 130 and light directing element 120.
  • the light source system 100 includes less than four lasers 130, such as three lasers 130, and any of the three sidewalls 111a of the recess 111 may be provided with a laser 130, or Two of the three lasers 130 are disposed in one side wall 111a, and the remaining one of the lasers 130 is disposed in the other side wall 111a, or the three lasers 130 are disposed on either side if heat dissipation conditions permit.
  • the excitation light can excite the wavelength conversion layer 150 to generate the received laser light, and the received laser light is emitted from the light source system 100 to obtain the light source light.
  • the wavelength conversion layer 150 is provided with a yellow phosphor for generating a yellow laser.
  • the yellow light is emitted from the light guiding element 120 by the laser light to obtain yellow light source light.
  • the wavelength conversion layer 150 is disposed on the reflective layer 160 at the position of the bottom wall 111b.
  • the yellow received laser light emitted from the wavelength conversion layer 150 and the unconverted blue excitation light are directly incident on the light guiding element 120.
  • the portion of the excitation light that is not converted, under the reflection of the light guiding element 120 and the reflective layer 160, can excite the wavelength conversion layer 150 a plurality of times until it is converted into a laser light to be emitted from the light guiding element 120.
  • the wavelength conversion layer 150 can be disposed on the reflective layer 160 at the position of any of the sidewalls 111a, or at a position on the plurality of groove walls of the groove 111 or a partial region on any of the groove walls.
  • the wavelength conversion layer 150 can be used to generate laser light of other colors under excitation of the excitation light, such as generating red and green laser light. That is, the wavelength conversion layer 150 is provided with a red fluorescent material and a green fluorescent material in sections, so that the generated optical power of the red-receiving laser and the green-receiving laser can reach a preset ratio. It is to be understood that, in other embodiments, the wavelength conversion layer 150 may also be provided with yellow and green fluorescent materials, or yellow and red fluorescent materials, or yellow, red, and green fluorescent materials, and is not limited thereto.
  • the wavelength conversion layer 150 has a rough surface to improve the light extraction efficiency of the wavelength conversion layer 150, and to reduce the reflection loss when the excitation light is grazing at a large angle.
  • the reflective layer 160 is disposed on the wall of the groove, that is, the reflective layer 160 covers the four sidewalls 111a and the bottom wall 111b, thereby reflecting light from various directions in the light source system 100, thereby increasing the number of times of light reflection.
  • the conversion efficiency of the excitation light is improved, and the light in the groove 111 can only be emitted from the light guiding element 120, which ensures the light extraction efficiency of the light source system 100.
  • the light guiding element 120 is for reflecting the excitation light and transmitting the laser light, and the light guiding element 120 may be a spectral filter plated with an anti-blue transparent film. It will be appreciated that in one embodiment, the light directing element 120 is a prism provided with an optical film that facilitates multiple reflections of the excitation light in the light source system 100. In other embodiments, the light directing element 120 can be coated according to the excitation light and the received laser color.
  • the groove 111 may have a different shape from the opening area of the other bottom wall 111b and the groove 111.
  • the area of the bottom wall 111b is smaller than the opening area, such as a truncated cone shape.
  • the shape, the pyramid shape, the U-shape, the V-shape or other irregular shapes are to ensure that the unconverted part of the excitation light emitted by the wavelength conversion layer 150 is incident on the light guiding element 120, thereby reflecting the excitation light and passing through the reflective layer 160.
  • the reflection to the wavelength conversion layer 150 is converted into a laser light, and is further emitted from the light guiding element 120, and also ensures that the excitation light not irradiated to the wavelength conversion layer 150 is guided to the wavelength conversion layer 150 through the reflective layer 160 and the light guiding element 120 to be converted into The laser is finally emitted from the light guiding element 120.
  • the laser 130 can be disposed in any of the sidewalls of the recess 111.
  • the wavelength conversion layer 150 is disposed on the bottom wall of the U-shaped groove; or the wavelength conversion layer 150 is disposed on one sidewall of the V-shaped groove, and the wavelength conversion layer 150 is located on the same sidewall as the laser 130. Or on the opposite side walls.
  • FIG. 4 is a schematic cross-sectional view of a light source system 200 according to a second embodiment of the present invention.
  • FIG. 5 is a schematic top view of the light source system 200 shown in FIG.
  • the light source system 200 provided in the present embodiment has a cross-sectional structural view as shown in FIG. 4 in the same manner as the light source system 100.
  • the difference between the light source system 200 and the light source system 100 is mainly that the laser 230 in the light source system 200 is accommodated in the sidewall 211a of the recess 211 of the base 210 at a predetermined angle, so that the excitation light emitted by the laser 230 is radiated in a straight line.
  • the wavelength conversion layer 250 omits the beam deflecting device at the same time.
  • the laser 230 is at an angle to the bottom wall 211b in the vertical direction, so that the excitation light emitted from the laser 230 is irradiated to the wavelength conversion layer 250 in a straight line, thereby omitting the beam deflecting device;
  • the laser 230 is at an angle to the side wall 211a in the horizontal direction, so that the spots formed by the arbitrary two lasers 130 on the wavelength conversion layer 250 partially overlap, and the portions do not overlap, so that the spot emitted by the laser 230 can be further improved. Evenly irradiating on the wavelength conversion layer 250 can avoid the problem that the wavelength conversion layer 250 has a low conversion efficiency of the wavelength conversion layer 250 due to excessive local heat, and the laser spot irradiated on the wavelength conversion layer 250 is as shown in FIG.
  • the light source system 200 provided in the second embodiment can solve the heat dissipation problem of the laser 230 and the wavelength conversion layer 250.
  • the illumination device of the light source system 200 and the application light source system 200 is small in size and simple in structure.
  • the number of optical components used in the light source system 200 is reduced, the internal space of the light source system 200 is saved, and the cost is lower.
  • FIG. 7 is a cross-sectional structural diagram of a third embodiment of the light source system 100 shown in FIG. 1 .
  • the light source system 300 provided in the present embodiment has a cross-sectional structural view as shown in FIG. 7 in the same manner as the light source system 100.
  • the light source system 300 differs from the light source system 100 mainly in that the laser 330 in the light source system 300 emits excitation light of a first polarization state, the wavelength conversion layer 350 changes the polarization state of the excitation light, and the light guiding element 320 is plated with an optical film.
  • a polarizing prism for reflecting light of a first polarization state and transmitting light of other polarization states, that is, excitation light of a first polarization state is changed by a wavelength conversion layer 350, and finally is in the form of other polarization states.
  • the light is guided from the light guiding element 320, and the laser light of the other polarization state is also emitted from the light guiding element 320.
  • the blue excitation light emitted from the light guiding element 320 is combined with the yellow laser light to obtain white light source light. It should be noted that, within the scope of the spirit or the essential features of the present invention, the specific solutions applicable to the first embodiment may also be correspondingly applied to the second embodiment, in order to save space and avoid repetition, here I won't go into details.
  • the light source system 300 provided in the third embodiment can solve the heat dissipation problem of the laser 330 and the wavelength conversion layer 350 in the light source system 300, and the illumination device of the light source system 300 and the application light source system 300 is small in size and simple in structure.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

本发明提供的一种光源系统与包括所述光源系统的照明装置，所述光源系统，包括：至少一激光器、基体、反射层、波长转换层及光引导元件；所述激光器用于发出激发光；所述基体由高导热材料制成，所述基体设置有凹槽，所述激光器容置于所述凹槽的侧壁中；所述反射层覆盖于所述槽壁，用于对所述激发光进行反射；所述波长转换层，设置于所述反射层上的部分表面，用于将所述激发光进行波长转换后得到受激光；所述光引导元件，覆盖于所述凹槽的开口，覆盖于所述凹槽的开口，用于引导所述激发光与所述受激光，从而得到所述光源系统出射的光源光。所述光源解决了所述激光器与所述波长转换层的散热问题。

Description

光源系统及照明装置 技术领域
本发明涉及光源技术领域，特别涉及一种光源系统及照明装置。
背景技术
本部分旨在为权利要求书中陈述的本发明的具体实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。
目前，应用于照明领域的固态光源采用蓝光激光器加荧光粉以实现白光输出。蓝光激光器能在高驱动功率密度下工作，产生较高光通量。使用蓝光激光器的光源能够获得比LED高几十倍的亮度。对于体积和光学扩展量限制严格的应用，蓝光激光器作为光源有着先天的优势。
目前，基于蓝光激光器的固态光源仍存在一定的技术问题，如蓝光激光器芯片及波长转换层散热问题。
发明内容
本发明提供一种能够解决内部激光器及波长转换层散热问题的光源系统及照明装置。
一种光源系统，包括：
至少一激光器，用于发出激发光；
基体，由高导热材料制成，所述基体设置有凹槽，所述激光器容置于所述凹槽的侧壁中；
覆盖于所述凹槽槽壁上的反射层，用于对所述激发光进行反射；
波长转换层，设置于所述反射层的部分表面上，用于将所述激发光进行波长转换后得到受激光；
光引导元件，覆盖于所述凹槽的开口，用于引导所述激发光与所 述受激光，从而得到所述光源系统出射的光源光。
一种照明装置，包括如上所述的光源系统。
本发明提供的光源系统与包括所述光源系统的照明装置，所述光源系统中的基体由高导热材料制成，所述激光器容置于基体中，所述波长转换层的热量通过所述反射层传递至所述基体，从而解决了光源系统中所述激光器与所述波长转换层的散热问题，另外，由于所述激光器与所述波长转换层位于同一凹槽中，从而所述光源系统及所述照明装置体积小，结构简单紧凑。
附图说明
图1为本发明第一实施方式提供的光源系统的立体结构示意图。
图2为如图1所示的光源系统的沿II-II线剖视结构示意图。
图3为如图2所示的光源系统的俯视结构示意图。
图4为本发明第二实施方式提供的光源系统的剖视结构示意图。
图5为如图4所示的光源系统的俯视结构示意图。
图6为如图4所示的波长转换层上的光斑示意图。
图7为为本发明第三实施方式提供的光源系统的剖视结构示意图。
主要元件符号说明
光源系统 100、200、300
基体 110、210
凹槽 111、211
侧壁 111a、211a
底壁 111b、211b
光引导元件 120、320
激光器 130、230、330
光束偏转器件 140
波长转换层 150、250、350
反射层 160、360
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
请参阅图1-图3，图1为本发明第一实施方式提供的光源系统100的立体结构示意图，图2为如图1所示的光源系统100的沿II-II线剖视结构示意图，图3为如图2所示的光源系统100的俯视结构示意图。本发明实施方式提供的光源系统100包括：基体110、光引导元件120、激光器130、光束偏转器件140、波长转换层150及反射层160。
本实施方式中的光源系统100包括至少一激光器130，用于发出激发光。基体110由高导热材料制成，所述高导热材料可以是氮化铝、氮化硅、碳化硅、氮化硼，或者是金属铜、铝等。基体110设置有凹槽111，其中，激光器130容置于凹槽111的侧壁中，从而解决激光器130的散热问题。另外，激光器130与所述波长转换层150位于同一凹槽111中，光源系统100及应用光源系统100的照明装置体积小，结构简单紧凑。
光束偏转器件140与激光器130一一对应设置，光束偏转器件140用于引导其对应激光器130出射的激发光照射至波长转换层150。光束偏转器件140可以是棱镜、非球面透镜、自由曲面及反射镜等。
反射层160可以是漫反射层或金属反射层，覆盖于凹槽111的槽壁上，用于对光线进行反射，提高光源系统100的出光效率。
波长转换层150，设置于反射层160的部分表面上，用于将所述激发光进行波长转换后得到受激光，波长转换层150通过反射层160将热量传递至基体110，通过基体110进行散热，从而解决了波长转换层150的散热问题。
光引导元件120，覆盖于凹槽111的开口，用于反射激发光并透射所述受激光，所述受激光从光引导元件120出射得到光源系统100出射的光源光。
光源系统100的基体110由高导热材料制成，激光器130容置于基体110的槽壁中，波长转换层150产生的热量通过反射层160传递 至基体110，从而解决了光源系统中激光器130与波长转换层150的散热问题。
另外，光源系统100采用激光器130，并且激光器130与波长转换层150容置于同一基体110的凹槽111中，光源系统100不但出光亮度高，而且体积小。光源系统100还能够应用于照明设备中，本发明实施方式提供的照明装置可以为汽车车灯装置、舞台灯及激光大灯等领域。
在第一实施方式中，光源系统100包括四个相同的激光器130。激光器130可以为蓝色激光器，发出蓝色激发光。可以理解的是，激光器130不限于蓝色激光器，激光器130也可以是紫外激光器、红色激光器或绿色激光器等。可以理解，光源系统100可以包括一个、两个蓝色激光器或蓝色激光器阵列，具体其激光器130的数量可以依据实际需要选择。
凹槽111呈棱台状，凹槽111的槽壁包括四个侧壁111a及一个底壁111b。激光器130显露于基体110表面，任意两个激光器130容置于凹槽111的不同侧壁111a中。每个光束偏转器件140设置于其对应激光器130与光引导元件120之间。
可以理解的是，在一种实施方式中，光源系统100包括少于四个激光器130，比如三个激光器130，凹槽111的任意三个侧壁111a中可以均设置一激光器130，或所述三个激光器130中的两个设置于一侧壁111a中，剩余一个激光器130设置于另外一侧壁111a中，或者在散热条件允许的情况下，所述三个激光器130均设置于任一侧壁111a中。由于反射层160的反射作用及光引导元件120的滤光特性，所述激发光能够激发波长转换层150产生所述受激光，所述受激光从光源系统100出射得到所述光源光。
波长转换层150设置有黄色荧光粉用于产生黄色受激光。黄色受激光从光引导元件120出射得到黄色的光源光。
波长转换层150设置于底壁111b位置的反射层160上。波长转换层150出射的黄色受激光与未被转换的蓝色激发光直接入射至光引导 元件120。未被转换的部分激发光在光引导元件120及反射层160的反射作用下，能够多次激发波长转换层150，直至转换为受激光从光引导元件120出射。可以理解的是，波长转换层150可以设置于任意侧壁111a位置的反射层160上，或设置于凹槽111的多个槽壁上的位置或任意槽壁上的部分区域。另外，波长转换层150可以用于在所述激发光的激发下产生其他颜色的受激光，比如产生红色与绿色受激光。即波长转换层150分区段设置红色荧光材料及绿色荧光材料，使得产生的红色受激光与绿色受激光的光功率能够达到预设比例。可以理解的是，在其他实施方式中，波长转换层150还可以设置黄色与绿色荧光材料，或者黄色与红色荧光材料，或者黄色、红色及绿色荧光材料，并不以此为限。
另外，波长转换层150具有粗糙表面，以提高波长转换层150的出光效率，减少所述激发光大角度掠射时的反射损耗。
反射层160设置于所述槽壁上，即反射层160覆盖于四个侧壁111a及一个底壁111b，从而在光源系统100内从各个方向对其中光线进行反射，增加了光线反射的次数，提高了所述激发光的转换效率，另外凹槽111中的光线只能从光引导元件120出射，保证了光源系统100的出光效率。
在本实施方式中，光引导元件120用于反射激发光并透射受激光，光引导元件120可以是镀有反蓝透黄膜的分光滤光片。可以理解的是，在一种实施方式中，光引导元件120为设有光学膜的棱镜，所述棱镜便于所述激发光在光源系统100中进行多次反射。在其他实施方式中，光引导元件120可以根据所述激发光与所述受激光颜色进行镀膜。
可以理解的是，在一种实施方式中，凹槽111可以为其他底壁111b与凹槽111开口面积不同的形状，优选地，底壁111b的面积小于所述开口面积，比如圆台形，圆锥形、棱锥形、截面为U形、V形或其他不规则形状，以保证波长转换层150出射的未被转换的部分激发光入射至光引导元件120，进而反射激发光，并经过反射层160反射至波长转换层150转换成受激光，进而从从光引导元件120出射，也保证 了未照射至波长转换层150的激发光经过反射层160以及光引导元件120引导至波长转换层150转换成受激光，最终从光引导元件120出射。激光器130可以设置于凹槽111的任意侧壁中。在一些可能的实施方式中，波长转换层150设置于U形槽的底壁上；或波长转换层150设置于V形槽的一个侧壁上，波长转换层150与激光器130位于同一侧壁上或相对侧壁上均可。
请参阅图4-图6，图4为本发明第二实施方式提供的光源系统200的剖视结构示意图，图5为如图4所示的光源系统200的俯视结构示意图，图6为如图4所示的波长转换层250上的光斑示意图。
本实施方式中提供的光源系统200按照与光源系统100相同的方式得到如图4所示的剖视结构示意图。
光源系统200与光源系统100的区别主要在于：光源系统200中的激光器230呈预设角度容置于基体210的凹槽211的侧壁211a中，使得激光器230出射的激发光沿直线传播照射至波长转换层250，同时省略了光束偏转器件。需要说明的是，在本发明的精神或基本特征的范围内，适用于第一实施方式中的各具体方案也可以相应的适用于第二实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
具体地，如图4及图5所示，激光器230在垂直方向上与底壁211b呈一定角度，使得激光器230出射的激发光沿直线传播照射至波长转换层250，从而省略了光束偏转器件；如图5所示，激光器230在水平方向上与侧壁211a呈一定角度，使得任意两个激光器130在波长转换层250上形成的光斑部分重合，部分不重合，从而激光器230发出的光斑能更加均匀地照射在波长转换层250上，可避免波长转换层250由于局部热量过多造成的波长转换层250转换效率降低的问题，照射在波长转换层250上的激光光斑如图6所示。
第二实施方式中提供的光源系统200能够解决激光器230与波长转换层250的散热问题，光源系统200及应用光源系统200的照明装置体积小，结构简单紧凑。另外，光源系统200中减少了使用光学器件数量，节省了光源系统200的内部空间，有成本更低的特点。
请参阅图7，为如图1所示的光源系统100的第三实施方式提供的剖视结构示意图。
本实施方式中提供的光源系统300按与光源系统100相同的方式得到如图7所示的剖视结构示意图。
光源系统300与光源系统100的区别主要在于：光源系统300中的激光器330发出第一偏振态的激发光，波长转换层350改变所述激发光的偏振态，光引导元件320为镀有光学膜的偏振棱镜，所述偏振棱镜用于反射第一偏振态的光，并透射其他偏振态的光，即第一偏振态的激发光经过波长转换层350改变偏振态，最终以其他偏振态的形式从光引导元件320出射，其他偏振态的受激光也从光引导元件320出射，光引导元件320出射的蓝色激发光与黄色受激光合光得到白色的光源光。需要说明的是，在本发明的精神或基本特征的范围内，适用于第一实施方式中的各具体方案也可以相应的适用于第二实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
第三实施方式中提供的光源系统300，能够解决光源系统300中激光器330与波长转换层350的散热问题，并且光源系统300及应用光源系统300的照明装置体积小，结构简单紧凑。
以上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 (11)

  1. 一种光源系统，其特征在于，包括：
    至少一激光器，用于发出激发光；
    基体，由高导热材料制成，所述基体设置有凹槽，所述激光器容置于所述凹槽的侧壁中；
    覆盖于所述凹槽槽壁上的反射层，用于对所述激发光进行反射；
    波长转换层，设置于所述反射层的部分表面上，用于将所述激发光进行波长转换后得到受激光；
    光引导元件，覆盖于所述凹槽的开口，用于引导所述激发光与所述受激光，从而得到所述光源系统出射的光源光。
  2. 如权利要求1所述的光源系统，其特征在于，所述光引导元件包括分光滤光片。
  3. 如权利要求1所述的光源系统，其特征在于，所述凹槽包括底壁与侧壁，所述底壁与开口面积不同。
  4. 如权利要求3所述的光源系统，其特征在于，所述凹槽的底壁与侧壁上均覆盖有所述反射层，所述波长转换层设置于所述反射层上覆盖所述底壁的表面。
  5. 如权利要求4所述的光源系统，其特征在于，所述光源系统还包括与所述激光器一一对应设置的光束偏转器件，所述光束偏转器件用于引导其对应激光器出射的激发光照射至所述波长转换层。
  6. 如权利要求5所述的光源系统，其特征在于，所述凹槽呈棱台状，所述激光器显露于所述基体表面，任意两个激光器容置于所述凹槽的不同侧壁中，每个光束偏转器件设置于其对应激光器与所述光引导元件之间。
  7. 如权利要求4所述的光源系统，其特征在于，所述多个激光器呈预设角度容置于所述凹槽侧壁中，使得所述激光器出射的激发光沿直线传播照射至所述波长转换层。
  8. 如权利要求6所述的光源系统，其特征在于，任意两个激光器 在所述波长转换层上形成的光斑部分重合。
  9. 如权利要求1所述的光源系统，其特征在于，所述光引导元件为棱镜。
  10. 如权利要求8所述的光源系统，其特征在于，所述激光器发出第一偏振态的激发光，所述波长转换层改变所述激发光的偏振态，所述棱镜用于反射第一偏振态的光，透射其他偏振态的光。
  11. 一种照明装置，其特征在于，包括如权利要求1-10任意一项所述的光源系统。
PCT/CN2018/088524 2017-12-28 2018-05-25 光源系统及照明装置 Ceased WO2019128079A1 (zh)

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