WO2018010231A1 - 受激光激发转化成白光的方法、装置及其应用 - Google Patents

受激光激发转化成白光的方法、装置及其应用 Download PDF

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WO2018010231A1
WO2018010231A1 PCT/CN2016/093131 CN2016093131W WO2018010231A1 WO 2018010231 A1 WO2018010231 A1 WO 2018010231A1 CN 2016093131 W CN2016093131 W CN 2016093131W WO 2018010231 A1 WO2018010231 A1 WO 2018010231A1
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light
laser
converting
emitting device
white light
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PCT/CN2016/093131
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French (fr)
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夏泽强
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广州市新晶瓷材料科技有限公司
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • 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
    • F21K99/00—Subject matter not provided for in other groups of this subclass

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  • the invention belongs to the technical field of illumination, and particularly relates to a method for converting ceramics or crystals into white light by using a laser.
  • LED lighting can save 50-70% compared with traditional incandescent lamps and energy-saving lamps.
  • Laser lighting as the next-generation lighting technology for LEDs, can save electricity 50- 80% will become an alternative to LED.
  • the technical problem to be solved by the present invention is to provide a transparent fluorescent ceramic which can be converted into white light after being directly excited by a blue laser, and which is not subjected to high temperature caused by laser light in the case of long-term exposure to laser light. And a method of converting a failed laser into white light and a light-emitting device, and a specific application of the method and the light-emitting device in the field of illumination.
  • a method for converting into laser light by laser excitation characterized in that white light is obtained by excitation of a light conversion medium by a blue laser.
  • the wavelength of the blue laser light is between 420 and 470 nm;
  • the blue laser of the above wavelength can be directly generated by the LD chip
  • a plurality of LD chips may be mixed by series, parallel or series-parallel connection, and then combined by the optical fiber;
  • It can also be generated by multiplying or mixing by gain through a pumping light source
  • the light conversion medium may be any one of glass, transparent ceramic, and single crystal;
  • the visible light transmittance of the light conversion medium is greater than 80%;
  • the body of the light conversion medium is yellow or yellowish green and has an emission wavelength of 520-760 nm.
  • the light conversion medium is subjected to polishing and coating treatment on the excited surface.
  • the light exiting surface of the light conversion medium has a shape of a plane, a cone surface, and a curved surface, wherein an exit angle of the curved surface and the tapered surface is an angle of 1-150 degrees; or the light conversion medium is a lens with a light-emitting effect.
  • the present invention also provides a light-emitting device that is converted into white light by laser excitation, and includes a laser emitting device and a light-converting medium, wherein the laser light-emitting device emits a blue laser light and is excited to convert into white light after passing through the light-converting medium.
  • the wavelength of the blue laser light is between 420 and 470 nm;
  • the blue laser of the above wavelength can be directly generated by the LD chip
  • a plurality of LD chips may be mixed by series, parallel or series-parallel connection, and then combined by the optical fiber;
  • It can also be generated by multiplying or mixing by gain through a pumping light source
  • the light conversion medium may be any one of glass, transparent ceramic, and single crystal;
  • the visible light transmittance of the light conversion medium is greater than 80%;
  • the body of the light conversion medium is yellow or yellowish green and has an emission wavelength of 520-760 nm.
  • the light conversion medium is subjected to polishing and coating treatment on the excited surface.
  • the light exiting surface of the light conversion medium has a shape of a plane, a cone surface, and a curved surface, wherein an exit angle of the curved surface and the tapered surface is an angle of 1-150 degrees; or the light conversion medium is a lens with a light-emitting effect.
  • a white light source comprising the light-emitting device that is converted into white light by laser excitation.
  • a lighting fixture comprising the light-emitting device that is converted into white light by laser excitation as a light source.
  • a projection apparatus comprising the light-emitting device that is converted into white light by laser excitation as a light source.
  • the invention realizes direct conversion after single blue laser excitation, stable light output quality, and simpler and more efficient packaging process and structure;
  • the traditional process of applying phosphor powder does not guarantee the life of the light source, and the three-primary white laser is susceptible to color change due to the attenuation of one of the lights, resulting in no guarantee of light quality; and the invention adopts high temperature resistant glass, Crystals and ceramics do not cause failure under high temperature conditions. They are more stable than phosphors prepared by mixing colloids and phosphors, ensuring no discoloration at high temperatures, no color drift, due to the properties of glass, crystal and ceramics. Stable, does not change due to temperature changes, so there is no problem with the service life.
  • High-efficiency transparent light conversion medium is adopted, and its body is yellow or yellow-green after preparation, which not only has high visible light transmittance, but also has higher light-emitting efficiency and high light after polishing and surface coating treatment. Conversion efficiency.
  • Fig. 1 is a schematic view showing the structure of a light-emitting device which is converted into white light by laser excitation according to the present invention.
  • FIG. 2 is a schematic view showing another structure of a light-emitting device of the present invention which is converted into white light by laser excitation using a planar light conversion medium.
  • FIG. 3 is a schematic view showing the structure of a light-emitting device of the present invention which is converted into white light by laser excitation using a curved surface light conversion medium.
  • FIG. 4 is a schematic view showing another structure of a light-emitting device of the present invention which is converted into white light by laser excitation using a curved surface light conversion medium.
  • Fig. 5 is a schematic view showing the structure of a light-emitting device which is converted into white light by laser excitation according to the present invention and which adopts a cone-shaped optical conversion medium.
  • Fig. 6 is a schematic view showing another structure of a light-emitting device of the present invention which is converted into white light by laser excitation using a cone-shaped optical conversion medium.
  • a light-emitting device converted into white light by laser excitation comprises a light conversion medium 1 and a laser emitting device 2, and the laser light-emitting device emits a blue laser light and is excited by the light conversion medium. Converted into white light.
  • the wavelength of the blue laser light is between 420 and 470 nm; the blue laser of the above wavelength can be directly generated by the LD chip; or the plurality of LD chips can be mixed by series, parallel or series and parallel connection, and then combined by the optical fiber.
  • Generated; or generated by a single LD light source or array; can also be generated by multiplying or mixing by gain through a pumping source; of course, a blue laser having a wavelength of 420-470 nm generated by other means can also be used.
  • the light conversion medium may be any one of glass, transparent ceramic, and single crystal; the light conversion medium described in this embodiment is a transparent ceramic, and the body of the transparent ceramic is yellow or yellowish green, and When the emission wavelength is adjusted to 520-760 nm and the visible light transmittance is more than 80%, the light conversion efficiency obtained is the best.
  • the light conversion medium is subjected to polishing and coating treatment on the excited surface.
  • the shape of the light exit surface of the light conversion medium may be a plane as shown in FIGS. 1 and 2; or may be an arc surface surface as shown in FIGS. 3 and 4; or in FIGS. 5 and 6.
  • the outer surface of the cone wherein the exit angle of the curved surface and the cone is an angle of 1-150 degrees.
  • the light conversion medium can also be made into various lens structures with light-emitting effects.
  • the transparent ceramic can be replaced by glass or single crystal, and the purpose of exciting white light can be achieved efficiently and stably.
  • the present invention also discloses a method for converting into laser light by laser excitation, which is converted into white light by excitation of a light conversion medium by a blue laser; the wavelength of the blue laser light is between 420 and 470 nm; further, the wavelength is Blue light
  • the laser can be directly generated by the LD chip; it can also be generated by connecting multiple LD chips by series, parallel or series and parallel mixing, and then combining by the optical fiber; or by a single LD light source or array; or by pumping
  • the light source is generated by frequency multiplication or mixing after gain; or other manner, a blue laser having a wavelength of 420-470 nm is generated.
  • the light conversion medium may be any one of glass, transparent ceramic, and single crystal; in the embodiment, the light conversion medium is made of transparent ceramic, and the transparent ceramic body is yellow or yellowish green. And the emission wavelength is adjusted to 520-760 nm, and when the visible light transmittance is more than 80%, the obtained light conversion efficiency is optimal. In order to improve the light conversion effect, it is also possible to perform polishing and coating treatment on the excited surface of the light conversion medium. Meanwhile, the shape of the light exit surface of the light conversion medium may be a plane as shown in FIGS. 1 and 2; or may be an arc surface surface as shown in FIGS. 3 and 4; or in FIGS. 5 and 6.
  • the outer surface of the cone wherein the exit angle of the curved surface and the cone is an angle of 1-150 degrees.
  • the light conversion medium can also be made into various lens structures with light-emitting effects.
  • the transparent ceramic can be replaced by glass or single crystal, and the purpose of exciting white light can be achieved efficiently and stably.
  • the present invention can also be applied to the field of white light source, illumination lamp or projection device, and the like, which can be used in the field of white light source, illumination lamp or projection device, and can also be used as a part of the light source.
  • the light conversion efficiency and in the case of long-term exposure to laser light, color change and failure are not caused by the high temperature generated by the laser, so that the life of the light source is significantly increased, and the cost is greatly saved.
  • the invention utilizes yellow transparent ceramics, glass, and single crystal to better handle the light conversion problem, the blue laser can be converted into white light, and the light conversion efficiency is greatly improved, so the above device can also be used in the field of illumination, projection, etc.
  • the field of high-efficiency light output is required to be used as an illuminating source for illuminators or projection instruments, and has extremely high economic value.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Lasers (AREA)
  • Luminescent Compositions (AREA)

Abstract

一种受激光激发转化成白光的方法和装置，以及该方法和装置在照明领域的具体应用。所述方法是通过蓝光激光激发光转换介质（1）后转化获得白光；所述蓝光激光的光波长为420-470nm之间；蓝光激光可以由LD芯片直接产生；也可由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；或由目前单颗LD光源或阵列产生；亦可由通过泵浦光源通过增益后倍频或混频产生；或其他方式产生的波长为420-470nm的蓝光激光；所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种。

Description

受激光激发转化成白光的方法、装置及其应用 技术领域
本发明属于照明技术领域，具体涉及一种利用激光激发陶瓷或晶体后转化成白光的方法。
背景技术
目前，照明领域采用的最为先进的技术是LED照明，LED照明较传统白炽灯和节能灯可以省电50-70％；而激光照明作为LED下一代的照明技术，较LED还可省电50-80％，将成为LED的替代性产品。作为激光照明，目前部份厂家只有在投影和车灯方面有所探索，并且通常都是采用RGB或色片的方式，其工艺复杂，效率低。
发明内容
本发明所要解决的技术问题在于提供一种使用透明荧光陶瓷，直接接受蓝光激光激发后就可转化成白光，并且在长期在接受激光照射的情况下，不会受激光产生的高温而出现颜色变化和失效的激光转化成白光的方法和发光装置，以及该方法和发光装置在照明领域的具体应用。
本发明是采用下述技术方案实现的：
一种受激光激发转化成白光的方法，其特征在于：通过蓝光激光激发光转换介质后转化获得白光。
进一步地，所述蓝光激光的光波长为420-470nm之间；
进一步地，上述波长的蓝光激光可以由LD芯片直接产生；
也可由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；
或由目前单颗LD光源或阵列产生；
亦可由通过泵浦光源通过增益后倍频或混频产生；
或其他方式产生的波长为420-470nm的蓝光激光。
进一步地，所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种；
进一步地，所述光转换介质的可见光透过率大于80％以上；
所述光转换介质的本体呈黄色或黄绿色，其发射波长为520-760nm。
进一步地，为了提高光转换效果，所述光转换介质在受激发面做抛光和镀膜处理。
所述光转换介质的光线出射面的形状为平面、锥面、弧面，其中弧面和锥面的出射角为1-150度角；或者所述光转换介质为带出光效果的透镜。
同时，本发明还提供一种受激光激发转化成白光的发光装置，包括激光发射装置和光转换介质，其特征在于，所述激光发光装置发出蓝光激光并通过光转换介质后激发转化成白光。
进一步地，所述蓝光激光的光波长为420-470nm之间；
进一步地，上述波长的蓝光激光可以由LD芯片直接产生；
也可由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；
或由目前单颗LD光源或阵列产生；
亦可由通过泵浦光源通过增益后倍频或混频产生；
或其他方式产生的波长为420-470nm的蓝光激光。
进一步地，所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种；
进一步地，所述光转换介质的可见光透过率大于80％以上；
所述光转换介质的本体呈黄色或黄绿色，其发射波长为520-760nm。
进一步地，为了提高光转换效果，所述光转换介质在受激发面做抛光和镀膜处理。
所述光转换介质的光线出射面的形状为平面、锥面、弧面，其中弧面和锥面的出射角为1-150度角；或者所述光转换介质为带出光效果的透镜。
上述受激光激发转化成白光的发光装置，还可以应用在下述领域：
一种白光光源，包括所述的受激光激发转化成白光的发光装置。
一种照明灯具，包括所述的受激光激发转化成白光的发光装置作为光源。
一种投影装置，包括所述的受激光激发转化成白光的发光装置作为光源。
本发明具有以下优点：
1、与现有技术中采用的是RGB方式或色片的方式不同，本发明实现了单一蓝色激光激发后直接转化，出光质量稳定，封装工艺和结构也更简单高效；
2、传统的涂荧光粉的工艺对于光源的寿命没有保障，三基色白光激光容易受其中一种光的衰减而出现颜色变化，导致出光质量也没有保障；而本发明采用了耐高温的玻璃、晶体和陶瓷，不会在高温的条件下产生失效，较现在通过胶体与荧光粉混合制备的荧光片更稳定，可确保在高温情况下不变色，不色漂，由于玻璃、晶体和陶瓷的性能稳定，不会受温度的变化而变化，因此也不存在使用寿命的问题，
3、采用了高效透明光转换介质，其的本体在制备完成后就呈黄色或黄绿色，不仅可见光透过率高，经打磨和表面镀膜处理后，出光效率更高，并且实现了高的光转化效率。
附图说明
图1是本发明受激光激发转化成白光的发光装置采用平面光转换介质的结构示意图。
图2是本发明受激光激发转化成白光的发光装置采用平面光转换介质的另一种结构示意图。
图3是本发明受激光激发转化成白光的发光装置采用弧面光转换介质的结构示意图。
图4是本发明受激光激发转化成白光的发光装置采用弧面光转换介质的另一种结构示意图。
图5是本发明受激光激发转化成白光的发光装置采用锥面光转换介质的结构示意图。
图6是本发明受激光激发转化成白光的发光装置采用锥面光转换介质的另一种结构示意图。
具体实施方式
如图1所示，是本发明所述的一种受激光激发转化成白光的发光装置，包括光转换介质1和激光发射装置2，所述激光发光装置发出蓝光激光并通过光转换介质后激发转化成白光。所述蓝光激光的光波长为420-470nm之间；上述波长的蓝光激光可以由LD芯片直接产生；也可由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；或由目前单颗LD光源或阵列产生；亦可由通过泵浦光源通过增益后倍频或混频产生；当然也可以采用由其他方式产生的波长为420-470nm的蓝光激光。
所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种；在本实施例中所述的光转换介质采用的是透明陶瓷，该透明陶瓷的本体呈黄色或黄绿色，并且将其发射波长调整为520-760nm，可见光透过率大于80％以上时，其获得的光转化效率最佳。为了提高光转换效果，所述光转换介质在受激发面做抛光和镀膜处理。同时，所述光转换介质的光线出射面的形状可以为如图1和图2中的平面；还可以是如图3和图4中的弧形表面面；或是图5和图6中的锥体外表面；其中弧面和锥体的出射角为1-150度角。当然，所述光转换介质也可以做成各种带出光效果的透镜结构。
同时，也可以将上述透明陶瓷替换为玻璃或单晶，同样可以达到高效稳定的激发白光的目的。
同样，本发明还公开了一种受激光激发转化成白光的方法，通过蓝光激光激发光转换介质后转化获得白光；所述蓝光激光的光波长为420-470nm之间；进一步地，上述波长的蓝光 激光可以由LD芯片直接产生；也可由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；或由目前单颗LD光源或阵列产生；亦可由通过泵浦光源通过增益后倍频或混频产生；或其他方式产生的波长为420-470nm的蓝光激光。
进一步地，所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种；在本实施例中所述的光转换介质采用的是透明陶瓷，该透明陶瓷的本体呈黄色或黄绿色，并且将其发射波长调整为520-760nm，可见光透过率大于80％以上时，其获得的光转化效率最佳。为了提高光转换效果，还可以在所述光转换介质在受激发面做抛光和镀膜处理。同时，所述光转换介质的光线出射面的形状可以为如图1和图2中的平面；还可以是如图3和图4中的弧形表面面；或是图5和图6中的锥体外表面；其中弧面和锥体的出射角为1-150度角。当然，所述光转换介质也可以做成各种带出光效果的透镜结构。同时，也可以将上述透明陶瓷替换为玻璃或单晶，同样可以达到高效稳定的激发白光的目的。
同时，本发明还可以将上述实施例中所述的受激光激发转化成白光的发光装置，应用在白光光源、照明灯具或者投影装置等领域，作为其发光光源部分使用，同样可以剧院较高的光转换效率并且在长期在接受激光照射的情况下，不会受激光产生的高温而出现颜色变化和失效，使其光源的寿命明显增加，大大节省成本。
由于本发明利用黄色透明陶瓷、玻璃、单晶可以较好的处理了光转换问题，能将蓝光激光转换成白光，并大幅提高了光转换效率，因此上述的装置还可用于照明领域、投影等要求高效率光输出的领域，作为照明器或投影仪器的发光光源使用，具有极高的经济价值。

Claims (19)

  1. 一种受激光激发转化成白光的方法，其特征在于：通过蓝光激光激发光转换介质后转化获得白光。
  2. 根据权利要求1所述的受激光激发转化成白光的方法，其特征在于：所述蓝光激光的光波长为420-470nm之间。
  3. 根据权利要求2所述的受激光激发转化成白光的方法，其特征在于：所述波长的蓝光激光可以由以下任一种方式产生：
    (1)由LD芯片直接产生；
    (2)由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；
    (3)由目前单颗LD光源或阵列产生；
    (4)由通过泵浦光源通过增益后倍频或混频产生。
  4. 根据权利要求1所述的受激光激发转化成白光的方法，其特征在于：所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种。
  5. 根据权利要求4所述的受激光激发转化成白光的方法，其特征在于：所述光转换介质的可见光透过率大于80％。
  6. 根据权利要求4所述的受激光激发转化成白光的方法，其特征在于：所述光转换介质的本体呈黄色或黄绿色，其发射波长为520-760nm。
  7. 根据权利要求4所述的受激光激发转化成白光的方法，其特征在于：所述光转换介质在受激发面做抛光和镀膜处理。
  8. 根据权利要求7所述的受激光激发转化成白光的方法，其特征在于：所述光转换介质的光线出射面的形状为平面、锥面、弧面，其中弧面和锥面的出射角为1-150度角；或者所述光转换介质为带出光效果的透镜。
  9. 一种受激光激发转化成白光的发光装置，包括激光发射装置和光转换介质，其特征在于，所述激光发光装置发出蓝光激光并通过光转换介质后激发转化成白光。
  10. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述蓝光激光的光波长为420-470nm之间。
  11. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述波长的蓝光激光可以由以下任一种方式产生：
    (1)由LD芯片直接产生；
    (2)由多颗LD芯片通过串联、并联或串并联混后连接后，再通过光纤合束后产生；
    (3)由目前单颗LD光源或阵列产生；
    (4)通过泵浦光源照射到增益介质上，用反射腔将增益介质所发出的光收集，然后通过变频或混频晶体。
  12. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述光转换介质可以为玻璃、透明陶瓷、单晶中的任一种。
  13. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述光转换介质的可见光透过率大于80％以上；
  14. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述光转换介质的本体呈黄色或黄绿色，其发射波长为520-760nm。
  15. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述光转换介质在受激发面做抛光和镀膜处理。
  16. 根据权利要求9所述的受激光激发转化成白光的发光装置，其特征在于：所述光转换介质的光线出射面的形状为平面、锥面、弧面，其中弧面和锥面的出射角为1-150度角；或者所述光转换介质为带出光效果的透镜。
  17. 一种白光光源，其特征在于：包括权利要求9-16任一所述的受激光激发转化成白光的发光装置。
  18. 一种照明灯具，其特征在于：包括权利要求9-16任一所述的受激光激发转化成白光的发光装置作为光源。
  19. 一种投影装置，其特征在于：包括权利要求9-16任一所述的受激光激发转化成白光的发光装置作为光源。
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