WO2020019714A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2020019714A1
WO2020019714A1 PCT/CN2019/076654 CN2019076654W WO2020019714A1 WO 2020019714 A1 WO2020019714 A1 WO 2020019714A1 CN 2019076654 W CN2019076654 W CN 2019076654W WO 2020019714 A1 WO2020019714 A1 WO 2020019714A1
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WO
WIPO (PCT)
Prior art keywords
light
lighting device
heat
emitting body
laser
Prior art date
Application number
PCT/CN2019/076654
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English (en)
Chinese (zh)
Inventor
张贤鹏
胡飞
余新
李屹
张红秀
Original Assignee
深圳市绎立锐光科技开发有限公司
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Publication of WO2020019714A1 publication Critical patent/WO2020019714A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • 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
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • 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
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • 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]

Definitions

  • the present application relates to the field of lighting technology, and in particular, to a lighting device.
  • the headlight As an indispensable functional part of a motor vehicle, the headlight is the main way of vehicle lighting.
  • the headlights of vehicles are an important guarantee to ensure the safety of the vehicle.
  • Its brightness and illumination distribution have formed strict industry standards and specifications.
  • Traditional modern automobile headlights have experienced the evolution of light sources such as incandescent, halogen, and xenon lamps, and have formed more mature lamp design, manufacturing, and brightness distribution implementation solutions.
  • the demand for reducing lamp power consumption and achieving safer lamp lighting has also become increasingly prominent, which has also promoted the development of car headlight technology based on LED and laser light sources. .
  • LED car headlights are usually set with multiple light sources and multiple lighting modes to meet the needs of use. Due to the large difference in luminous characteristics between LEDs and traditional halogen lamps and tungsten light bulbs, even in the case of retrofitting LED car filaments, even if there has been a major improvement in recent years, there are still traditional reflection cup mismatches that cause the LED car lights to have non-compliant lighting phenomenon.
  • the laser light source has a high light intensity per unit area, and combined with the wavelength conversion phosphor technology, it has the application potential of easier realization of light type control and efficient illumination distribution, and has been applied in the field of automotive lights, especially high-beam lighting. try.
  • the current laser light sources also have shortcomings such as direct human eye hazards, high protection requirements, new system design, and overall replacement of car lights. At the same time, the replacement is quite difficult, especially in the aftermarket. Demand for traditional car light sources.
  • the present application separates the light source from the light emitting body, and provides a lighting device with high safety performance, including: a light source for emitting laser light; and a light emitting body for receiving all light sources.
  • the laser light emitted by the light source is subjected to wavelength conversion to form illumination light.
  • the luminous body includes a light entrance end and a bottom end opposite to the light entrance end, and a light exit surface of the light emitter is disposed on the light entrance. A side surface between the end and the bottom end; a first protection element covering an outer surface of the bottom end of the light-emitting body and configured to prevent light of the light-emitting body from exiting from the bottom end.
  • the beneficial effect of the present application is that the two heat sources are isolated by separating the light source that emits the laser light and the luminous body; by setting the light emitting surface of the luminous body on the side between the incident end and the bottom end opposite to each other, and A first protection element is provided at the end to prevent light from exiting, so that the laser must go through a turning process before being emitted by the luminous body, eliminating the possibility of the laser leaking directly, thereby improving the safety of the light source.
  • a surface of the first protective element in contact with the light emitting body is a reflective surface, or a surface of the light emitting body in contact with the first protective element is a reflective surface, or the first protective element A reflective material is filled between the contact surface with the light-emitting body.
  • a scattering structure is provided at the bottom end of the luminous body.
  • the first protection element includes a heat dissipation structure.
  • a light-emitting body undergoes a wavelength conversion process, and a large amount of heat is bound to be generated.
  • This technical solution provides a heat dissipation structure on the side of the light-emitting body away from the light-incoming end, so that the heat generated by the light-emitting body can be away from the light-incoming end and away from the laser.
  • One side of the light source is radiated to realize the two-way conduction of heat, avoiding the accumulation of heat between the luminous body and the laser light source, which is conducive to the uniformity of the temperature distribution of the luminous body and the service life of the luminous body.
  • the luminous body includes a light guide and a wavelength conversion layer.
  • the wavelength conversion layer is disposed at the light exit surface.
  • the laser light enters the light guide from the light entrance end and passes through the light guide.
  • the wavelength conversion layer is emitted from the light emitting surface.
  • the wavelength conversion layer is a fluorescent silica gel, a fluorescent glass, a fluorescent ceramic, or a quantum dot film.
  • a surface of the light guide in contact with the wavelength conversion layer is provided with a microstructure. This technical solution improves the transmittance of light incident from the light guide to the wavelength conversion layer.
  • a selective light-transmitting film is provided on the light entrance end for transmitting the laser light incident at a small angle and reflecting other light.
  • the luminous body is a fluorescent light guide
  • the laser light enters the fluorescent light guide from the light entrance end, and is emitted from the light emitting surface after wavelength conversion through the fluorescent light guide.
  • the light emitting surface of the luminous body is provided with a high refractive medium and / or a microstructure.
  • a bottom end surface of the light emitting body is an arc surface.
  • the lighting device further includes a light-conducting component, which is disposed between the light source and the light-emitting body, and is configured to conduct laser light emitted by the light source to the light-emitting body. Into the light end.
  • the light transmitting component includes one or more of an optical lens and an optical fiber.
  • the lighting device further includes a heat conduction element and a heat dissipation base, and two ends of the heat conduction element are fixedly connected to the heat dissipation base and the light emitting body, respectively, and the heat conduction element forms a capacity with the heat dissipation base.
  • a receiving cavity, the light source and the light transmitting component are disposed in the receiving cavity.
  • connection surface between the heat-conducting element and the light-emitting body and the inner wall of the accommodating cavity are reflective surfaces.
  • the lighting device further includes a second protection element, and the second protection element is disposed on an optical path of the illumination light of the luminous body and has high light transmittance. The two ends are respectively connected to the first protection element and the heat conducting element.
  • heat conduction is filled between the heat conducting element and the heat dissipation base and / or between the heat conducting element and the light emitting body and / or between the light emitting body and the first protective element. material.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a lighting device according to the present application.
  • FIG. 2 is a schematic structural diagram of an embodiment of a light emitter according to the present application.
  • FIG. 3 is a schematic structural diagram of a second embodiment of a lighting device of the present application.
  • FIG. 4 is a schematic structural diagram of a third embodiment of a lighting device of the present application.
  • FIG. 5 is a schematic structural diagram of another embodiment of a light-emitting body of the present application.
  • FIG. 6 is a schematic structural diagram of a fourth embodiment of a lighting device of the present application.
  • FIG. 7 is a schematic structural diagram of another embodiment of a light-emitting body of the present application.
  • FIG. 8 is a schematic structural diagram of a fifth embodiment of a lighting device of the present application.
  • FIG. 9 is a schematic structural diagram of a sixth embodiment of the lighting device of the present application.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a lighting device of the present application.
  • the lighting device 10 improved in this embodiment includes a light source 11 for emitting laser light, a light conducting component 12 for conducting and condensing the laser light emitted from the light source 11, and a light receiving component 12 for receiving light transmitted by the light conducting component 12.
  • Luminous body 13 a first protection element 14 disposed on the luminous body 13 and used to protect the luminous body 13, a heat-conducting element 15 provided around the light source 11 and the light-conducting component 12, and a heat-dissipating base 16 attached to one end of the heat-conducting element 15.
  • the heat-conducting element 15 and the heat-dissipating base 16 form a receiving cavity.
  • the light source 11 is disposed in the accommodating cavity, and is specifically disposed on the heat-dissipating base.
  • the laser may be one or more lasers, which is not limited herein, but in this embodiment, one laser is used.
  • the light-conducting component 12 is also disposed in the accommodating cavity, and is used for converging the laser light emitted from the light source 11 into a laser light cone, and injecting the condensed laser light cone into the luminous body 13, optionally, the light-conducting component 12 It may be one or more of a single lens, a positive and negative lens group, an optical fiber, an optical waveguide, and a reflecting mirror. In this embodiment, the light transmitting component 12 is a single lens.
  • FIG. 2 is a schematic structural diagram of an embodiment of the light emitting body 13.
  • the luminous body 13 includes a light guide 131, a wavelength conversion layer 132 surrounding the light emitting surface of the light guide 131, a selective light-transmitting film 133 provided on the light entrance end of the light guide 131, a light guide 131, and a wavelength
  • the light guide 131 is used for transmitting laser light, and its material may be one of glass and alumina transparent ceramic, and the shape includes one of a cylinder, a quadrangular prism, a triangular prism, a hexagonal prism, and an octagonal prism.
  • the outer side of the light incident end is surrounded and fixed by the heat-conducting element 15, and at the same time, the bottom end of the light guide 131 away from the light incident end is fixed and surrounded by the first protection element 14.
  • the laser light enters the light guide 131 from the light entrance end, and passes through the wavelength conversion layer 132 and is emitted from the light exit surface.
  • the wavelength conversion layer 132 is installed on the outer surface of the middle position of the light guide 131 to form a light-emitting layer.
  • the installation method can be one of sintering, bonding, coating, and sticking, and its two ends are respectively connected to the first
  • the protective element 14 and the thermally conductive element 15 are in seamless contact, and are used to convert the laser light conducted in the light guide 131 into white light.
  • the wavelength conversion layer 132 is made of fluorescent silica gel, fluorescent glass, fluorescent ceramic, or quantum dot film.
  • the laser light transmitted in 131 passes through the wavelength conversion layer 132 and is converted into white light through the wavelength, and is emitted as illumination light.
  • the fluorescent silica gel is an organic phosphor powder layer bonded by silica gel / resin
  • the fluorescent glass is an inorganic phosphor powder layer that is bonded to the phosphor after the glass powder is softened.
  • Silica gel, resin, glass powder acts as an adhesive.
  • the fluorescent ceramic may be, for example, a pure-phase fluorescent ceramic or a multi-phase fluorescent ceramic.
  • Pure-phase fluorescent ceramics can be various oxide ceramics, nitride ceramics, or oxynitride ceramics.
  • a light-emitting center is formed by adding a trace amount of an activator element (such as a lanthanide element) during the ceramic preparation process. Because the doping amount of the activator element is generally small (generally less than 1%), such fluorescent ceramics are usually transparent or translucent luminescent ceramics.
  • pure phase fluorescent ceramics have a polycrystalline structure, and the wavelength conversion layer can also be a fluorescent single crystal.
  • the fluorescent single crystal has better light transmission properties, and is generally colored and transparent, and its thermal conductivity is high.
  • Multi-phase fluorescent ceramics use transparent / translucent ceramics as a matrix, and fluorescent ceramic particles (such as phosphor particles) are distributed in the ceramic matrix.
  • the transparent / translucent ceramic matrix can be various oxide ceramics (such as alumina ceramics, Y 3 Al 5 O 12 ceramics), nitride ceramics (such as aluminum nitride ceramics), or oxynitride ceramics.
  • the role of the ceramic matrix is to Light and heat are conducted so that the excitation light can be incident on the fluorescent ceramic particles and the received laser light can be emitted from the multi-phase fluorescent ceramics; the fluorescent ceramic particles assume the main luminous function of the fluorescent ceramics and are used to absorb the excitation light and convert it To be affected by laser.
  • the crystal grain size of the fluorescent ceramic particles is large, and the doping amount of the activator element is large (such as 1 to 5%), which makes the luminous efficiency high; and the fluorescent ceramic particles are dispersed in the ceramic matrix to avoid being located in the fluorescent ceramic.
  • the situation that the fluorescent ceramic particles at a deeper position cannot be irradiated by the excitation light, and also avoids the poisoning of the activator element concentration caused by the large doping amount of the pure phase fluorescent ceramic, thereby improving the luminous efficiency of the fluorescent ceramic.
  • scattering particles may be further added to each of the wavelength conversion layers, so that the scattering particles are distributed in the wavelength conversion layer.
  • the role of the scattering particles is to enhance the scattering of the excitation light in the luminescent ceramic layer, thereby increasing the optical path of the excitation light in the wavelength conversion layer, so that the light utilization rate of the excitation light is greatly improved, and the light conversion efficiency is improved.
  • the scattering particles can be scattering particles, such as alumina, yttrium oxide, zirconia, lanthanum oxide, titanium oxide, zinc oxide, barium sulfate, etc., can be either a single material scattering particle, or a combination of two or more It is characterized by its apparent white color, which can scatter visible light, and its material is stable and can withstand high temperatures.
  • the particle size and the wavelength of the excitation light are in the same order of magnitude or one order of magnitude lower.
  • the scattering particles can also be replaced with pores of the same size, and the refractive index difference between the pores and the matrix or the adhesive is used to achieve total reflection to scatter the excitation light or laser light.
  • the fluorescent ceramic may also be another composite ceramic layer, and the composite ceramic layer is different from the above-mentioned multi-phase fluorescent ceramic only in that the ceramic matrix is different.
  • the ceramic matrix is a pure phase fluorescent ceramic, that is, the ceramic matrix itself has an activator, which can emit laser light under the irradiation of excitation light.
  • This technical solution combines the advantages of the above-mentioned luminescent ceramic particles of the multi-phase fluorescent ceramic with high luminous efficiency and the advantages of the luminescent properties of the above-mentioned pure-phase fluorescent ceramic.
  • the fluorescent ceramic particles and the fluorescent ceramic matrix are used to emit light, which further improves the luminous efficiency.
  • the ceramic matrix has a certain amount of activator doping, the doping amount is low, which can ensure that the ceramic matrix has sufficient light transmission.
  • scattering particles or pores can also be added to enhance internal scattering.
  • the light-emitting material (such as a phosphor) of the wavelength conversion layer is not limited to a single material, and may also be a combination of multiple materials, or may be a superimposed combination of multiple material layers.
  • the volume distribution of the light emitting center in the wavelength conversion layer is not limited to a uniform distribution, and may be a non-uniform distribution such as a gradient distribution.
  • the selective light-transmitting film 133 is provided at the light-entering end of the light guide 131. It has certain light selection characteristics, and its light transmittance has a predetermined relationship with the wavelength and incident angle of the laser, which can make the laser enter the light guide efficiently.
  • the light body 131 prevents the laser light entering the light guide body 131 from escaping. Specifically, a small angle (for example, less than 20 degrees) of high blue light transmission, yellow light high reflection, and large angle incident blue light, yellow light high reflection characteristics can be realized. Because the laser beam angle range is small, it can ensure that most of the incident laser light enters the light guide. It can be understood that, in some embodiments, a selective light-transmitting film may not be provided at the light-entry end of the light guide, or a selective light-transmitting film with other optical properties may be provided.
  • the microstructure 134 is disposed between the wavelength conversion layer 132 and the light guide 131, and is used to increase the ratio of the laser light in the light guide 131 to the wavelength conversion layer 132.
  • the specific structure may be the surface of the light guide 131.
  • One of the structures such as a thread, a random micro-nano particle, and an ordered groove is not limited here, and can be obtained by mechanical processing, chemical etching, or the like.
  • the scattering particles 135 are disposed on an end surface of the light guide 131 where the one end 14 of the first protection element is disposed, and are used to enhance the scattering or reflection of laser light.
  • the first protective element 14 is disposed on the light-emitting body 13 away from the light-entering end and abuts the wavelength conversion layer 132 of the light-emitting body 13 for protecting the light-emitting body 13.
  • the material of the first protective element 14 may be aluminum, copper, One of alloy, temperature-resistant resin, and high thermal conductivity ceramic, which has a high heat dissipation structure.
  • the heat dissipation structure can be fin-shaped, fin-shaped, spiral-shaped, groove-shaped, needle-shaped, or improved.
  • One of the heat-dissipating coating structures, and the first protective element 14 and the light emitting body 13 may be filled with a high-reflection material that increases thermal conductivity, such as a silver paste.
  • the first protective element 14 has With a highly reflective cavity surface structure, the first protection element 14 can not only enhance heat dissipation, but also prevent the laser light in the light emitting body 13 from leaking out, and further reflect the laser light projected on the first protection element 14 into the light emitting body 13, Improve the use of laser propagation.
  • reflective particles or the like may be provided between the contact surface of the first protection element 14 and the bottom end of the light emitting body 13 to enhance reflection.
  • the heat conducting element 15 is attached to the outer periphery of the light emitting body 13 and abuts against the wavelength conversion layer 132, and the other end is attached to the heat dissipation base 16.
  • the heat-conducting element 15 and the heat-dissipating base 16 together form a containing cavity.
  • a part of the cavity formed by the heat-conducting element 15 and the heat-dissipating base 16 includes a light source 11 and a light-conducting component 12, and
  • the laser has strong heat generation, so the heat conducting element 15 is not only used for fixing, but also enhances heat dissipation.
  • the material can be one of aluminum, copper, temperature-resistant resin, and high thermal conductivity ceramic, which has high heat dissipation.
  • the structure is optional.
  • the structure of the heat dissipation structure can be one of a fin-like, fin-like, spiral-like, groove-like, needle-like structure, or a coating structure that enhances the heat-dissipating ability.
  • the interior is also a highly reflective cavity.
  • one end of the heat-conducting element and the heat sink base 16 are fixed by means including mechanical fixing, adhesion and the like, and the other end is fixed by surrounding the bottom end of the light-emitting body 13.
  • the heat dissipation base 16 is used to further enhance heat dissipation, and the two ends of the heat dissipation base 16 are respectively fixed with the heat conducting element 15, and the light source 11 is mounted on the heat dissipation base 16.
  • the light-conducting component 12 is not required in the present application, and the light-conducting component 12 may not be included in the case that the light path of the light source 11 can be changed.
  • FIG. 3 is a schematic structural diagram of a second embodiment of a lighting device according to the present application.
  • a second protection element 17 is further added outside the wavelength conversion layer.
  • the light-conducting component specifically includes two optical elements, including a convex lens and a concave lens.
  • the convex lens is used for condensing the laser light.
  • the concave lens can adjust the converged laser light so that the angle of the laser light incident into the luminous body is adjusted. It is changed, because the existence of the selective light-transmitting film makes the laser incident more efficient and more difficult to escape.
  • the second protection element 17 is disposed on the light path of the illuminating light of the luminous body.
  • the two ends of the second protection element are respectively connected to the first protection element 14 and the thermally conductive element 15 to protect the wavelength conversion layer and have the function of preventing ash and water.
  • It is made of transparent material, including but not limited to anti-reflection coating and self-cleaning film on both sides. It is possible to reduce the reflection phenomenon at the time of laser emission and improve the cleanliness.
  • the second protection element 17 is installed on one or both of the first protection element and the heat conduction element by including a mechanical fixing member and an adhesive, or by including heat. The curing and sintering methods are directly mounted on the wavelength conversion layer.
  • the second protection element 17 can be selectively installed with the working environment of the lighting device, such as being installed in a dust-free lamp cavity.
  • the protection element is covered by the non-light emitting layer on the light guide, and the heat dissipation structure and the high-reflection structure of the protection element are used to achieve the purpose of heat dissipation and reflection, so that the laser light is uniformly propagated inside the light guide, and the light guide
  • the purpose of uniform temperature inside the light body enhances luminous efficiency.
  • FIG. 4 is a schematic structural diagram of a third embodiment of the lighting device of the present application.
  • the lighting device 20 improved in this embodiment includes a light source 21 for emitting laser light, a light conducting component 22 for conducting and condensing the laser light emitted by the light source 21, and a light receiving component 22 for receiving light transmitted by the light conducting component 22.
  • the light-emitting body 23 is a first protection element 24 provided on the light-emitting body 23 for protecting the light-emitting body 23, a heat-conducting element 25 provided around the light source 21 and the light-conducting component 22, and a heat-dissipating base 26 attached to one end of the heat-conducting element 25.
  • the heat-conducting element 25 and the heat-dissipating base 26 form a receiving cavity.
  • the light source 21 is used to emit laser light, specifically a laser. In this embodiment, multiple groups of lasers are used, but in other embodiments, the number of lasers used is not limited.
  • the light-conducting component 22 is configured to conduct the laser light emitted by the light source 21 and adjust an incident angle so that the laser light enters the light-emitting body 23 vertically.
  • the light-conducting component 22 specifically includes an optical fiber and a lens.
  • the lens condenses the laser light from multiple lasers of the light source 21 and transmits it to the next large lens through an optical fiber, so that the laser light is not easily dispersed and consumed during the conduction process.
  • the direction of the laser light is changed through a large lens, so that the laser light can be incident parallel to the light-emitting body 23 and disposed in an accommodating cavity formed by the heat conducting element 25 and the heat dissipation base 26.
  • the contact surface between the first protection element 24 and the light emitting body 23 is an arc surface, so that the laser light can be more uniformly covered by the light emitting surface of the light emitting body after being reflected at the position of the arc surface.
  • the distance from the arc surface to the light exit surface is closer than the distance from the light entrance end to the light exit surface.
  • the arc surface can be regarded as a "light incident end”. The "light incident end" is closer to the light exit surface than the real light entrance end. By adjusting the shape of the arc surface, the laser light uniformly covers the light exit surface.
  • the specific structures and functions of the first protection element 24, the heat-conducting element 25, and the heat dissipation base 26 are the same as those of the corresponding components in the embodiment described in FIG. 1 to FIG. 3, and are not repeated here. .
  • FIG. 5 is a schematic structural diagram of still another embodiment of a light emitting body.
  • the laser light enters the light-emitting body 23 in parallel.
  • a selective light-transmitting film 235 is included, which can make the laser light incident in a high-transmittance and low-reflection mode when the laser light enters vertically.
  • the light body 231 is incident in parallel, and the direction is the other end of the light guide body 231 far from the light entrance end, so it will directly enter the other end far from the light entrance end, but in this embodiment, the other end of the light guide body 231 is adopted here.
  • the structure is a curved surface.
  • the first protective element 24 corresponding to the outer side of the light guide 231 away from the light-entering end also uses the same corresponding highly reflective curved surface structure, so that the laser can be reflected back at a certain angle.
  • the direction is the side wall of the light guide 231.
  • the light source 21 emits multiple groups of laser light through the optical fiber and the lens in the light-conducting component 22, so that the laser light enters the light-emitting body 23 in parallel, specifically the light-guiding body 231 in the light-emitting body 23, and the laser light is performed in the light-guiding body 231. Conducted in parallel on the bottom end, where the bottom end surface is a highly reflective arc surface, so that the laser light is reflected back to the light guide 231 at a different angle.
  • the heat conducting element 25 and the first protection element 24 covering the light guide 231 are inside the high reflection cavity surface So that after encountering the thermally conductive element 25 and the first protective element 24, the laser light is reflected back into the light guide 231 until the laser direction is the wavelength conversion layer 232, and the laser light passes through the wavelength conversion layer 232 and is emitted after wavelength conversion, and Due to the action of the microstructures 234, the probability that the laser light propagating between the light guides 231 enters the wavelength conversion layer 232 increases.
  • the laser light After the laser light enters the light guide 231, during the propagation process, it encounters the first protection element 24 covering the end, so that the laser light cannot be directly emitted, and passes through the highly reflective arc inside the first protection element 24 again. Reflected into the light guide body 231, most of the light is uniformly irradiated to the position of the wavelength conversion layer 232 corresponding to the light emitting surface under the effect of the arc surface, and the remaining light is repeatedly reflected until it is formed through the wavelength conversion layer 232 on the side. Illumination light is not incident and emitted in a single direction, so that the temperature of the laser light is uniform in the light guide 231, which makes the luminous efficiency more uniform and stable.
  • both the protection element 24 and the heat-conducting element 25 have a strong heat-dissipating structure, so that the entire light-emitting body 23 has good heat-dissipation, and avoids problems such as damage to eyesight, which may occur when the laser light is directly emitted from the end.
  • the propagation direction of the laser is controlled, and the loss is reduced.
  • the end of the light guide body away from the light-entering side adopts a highly reflective arc surface, so that the laser light directed on it changes the angle and reflects again. Light guide.
  • FIG. 6 is a schematic structural diagram of a fourth embodiment of the lighting device of the present application.
  • the lighting device 30 improved in this embodiment includes a light source 31 for emitting laser light, a light conducting component 32 for conducting and condensing the laser light emitted by the light source 31, and a light receiving component 32 for receiving light transmitted by the light conducting component 32.
  • the light-emitting body 33 is a first protection element 34 disposed on the light-emitting body 33 and used to protect the light-emitting body 33, a heat-conducting element 35 provided around the light source 31 and the light-conducting component 32, and a heat-radiating base 36 provided in close contact with one end of the heat-conducting element 35.
  • the second protection element 37 installed outside the light-emitting body 33 is connected at both ends to the heat-conducting element 35 and the first protection element 34 respectively, wherein the heat-conducting element 35 and the heat-dissipating base 36 form a receiving cavity.
  • the light-conducting component 32 is configured to converge the laser light emitted from the light source 31 and adjust the incident angle so that the laser light is incident perpendicularly into the light-emitting body 33.
  • the light-conducting component 32 specifically includes a positive and a negative lens for Converge and change the angle of the light, and make the laser light incident parallel to the light-emitting body 33, and set in a containing cavity formed by the heat conducting element 35 and the heat dissipation base 36.
  • the specific structures and functions of the first protection element 34, the heat-conducting element 35, and the heat sink base 36 are the same as the structures and functions of the corresponding components in the above embodiment, and are not repeated here.
  • FIG. 7 is a schematic structural diagram of another embodiment of a light emitter.
  • the luminous body 33 in this embodiment includes a fluorescent light guide 331, a selective light-transmitting film 332 installed on the light entrance end of the fluorescent light guide 331, and a light emitting layer installed on the fluorescent light guide 331 which is not covered.
  • the fluorescent light guide 331 is used to conduct laser light and convert the wavelength of the laser light, so that when the laser light enters the fluorescent light guide 331, it can not only conduct back and forth in the fluorescent light guide 331, but also transmit light during the conduction process.
  • the laser light undergoes wavelength conversion, and is emitted through the uncovered light-emitting layer to form illumination light.
  • the material of the fluorescent light guide 331 is similar to the wavelength conversion layer described above, and may also be fluorescent silica gel, fluorescent glass, fluorescent ceramic / single crystal.
  • the light-emitting surface of the luminous body 33 is agreed to be provided with a high-refractive medium or microstructure, and the working principles of the two are different.
  • the micro-structure is to change the incident angle of the light-emitting surface to avoid total reflection to achieve light exit
  • High-refractive media does not change the angle of incidence, but changes the angle of total reflection to achieve light exit. Both can enhance the emission of the illumination light converted by the fluorescent light guide 331.
  • a wavelength conversion layer may be provided on the light exit surface of the fluorescent light guide 331 to enhance the wavelength conversion and prevent incomplete conversion in the fluorescent light guide 331.
  • the light emitted by the light source 31 is condensed by the light conducting component 32, and then the condensed laser light is further adjusted so that the emitted laser light is incident into the light emitting body 33 in parallel, specifically the fluorescent light guiding body 331 incident into the light emitting body 33, so that the laser light
  • the wavelength is converted into white light.
  • the white light encounters the first protective element 34 and the thermally conductive element 35 covering the surface of the fluorescent light guide 331, the white light always fluoresces because the first protective element 34 and the thermally conductive element 35 are internally highly reflective.
  • the light guide body 331 reflects back and forth until the illumination light is emitted through the uncovered light emitting surface, and due to the action of the high refractive medium 333, the probability that the laser light propagating between the fluorescent light guide bodies 331 exits from the light emitting surface increases.
  • the laser light After the laser light enters the fluorescent light guide 331 and is converted into white light and propagates, it encounters the first protection element 34 covering the terminal, so that the white light cannot be directly emitted, and passes through the reflection inside the first protection element 34.
  • Surface and the scattering particles 334 at the end and the end of the fluorescent light guide 331 re-reflected into it, so that white light has been propagating back and forth between the fluorescent light guide 331 until it is emitted through the light emitting layer on the side to form illumination light, instead of incident in a single direction And emission, so that the temperature of the laser and white light is uniform in the fluorescent light guide 331, which makes the light emission efficiency more uniform and stable.
  • the first protection element 34 and the first protective element 34 covering the fluorescent light guide 331 and The heat-conducting elements 35 all have a strong heat-dissipating structure, so that the entire light-emitting body 33 has good heat-dissipation, and avoids problems such as damage to eyesight, which may occur when the laser light is directly emitted from the end.
  • FIG. 8 is a schematic structural diagram of a fifth embodiment of a lighting device of the present application. It is further expanded on FIG. 1.
  • the lighting device 40 improved in this embodiment includes a light source 41 for emitting laser light, and a light conducting component 42 for conducting and converging the laser light emitted by the light source 41 for receiving.
  • the light-emitting body 43 of the light transmitted by the light-conducting component 42 is provided on the light-emitting body 43 and a first protection element 44 for protecting the light-emitting body 43.
  • the heat dissipation base 46 is attached to one end of the element 45, and is designed on the reflective cup structure 48 of the fluorescent light guide body in the first protection element 44 and the heat conduction element 45 near the light body 43, and at the light entrance position of the heat conduction element 45 and the light body 43
  • This structure also has a structure in which the heat-conducting element 45 and the heat-dissipating base 46 form a receiving cavity.
  • the first protection element 44 and the heat conducting element 45 further include a reflective cup 48 design near the fluorescent light guide near the light emitting body 43, and at the same time, the heat conducting element is close to
  • the light-entering end of the light guide of the light-emitting body 43 further includes a design of the reflection cup 48, so that the laser light is better used and the light utilization rate is improved.
  • the above embodiment further optimizes the design of the reflection cup, thereby further improving the light conversion efficiency and utilization rate.
  • FIG. 9 is a schematic structural diagram of a sixth embodiment of a lighting device of the present application. And it is a further extension on FIG. 8.
  • the lighting device 50 improved in this embodiment includes a light source 51 for emitting laser light, a light conducting component 52 for conducting and condensing the laser light emitted from the light source 51, and a light receiving component 52 for receiving light transmitted by the light conducting component 52.
  • the luminous body 53 is a first protection element 54 provided on the luminous body 53 for protecting the luminous body 53, a heat conducting element 55 provided around the light source 51 and the light conducting component 52, and a heat dissipating base 56 provided in close contact with the heat conducting element 55
  • the reflective cup structure 58 of the fluorescent light guide in the first protective element 54 and the heat conducting element 55 is located near the light emitting body 53.
  • the structure is also provided at the light entrance of the heat conducting element 55 and the light emitting body 53. Among them, the heat conducting element 55 and The heat dissipation base 56 forms a receiving cavity.
  • the multi-light source input used by the light source 51 used in this embodiment that is, multiple lasers are used, thereby increasing the brightness, but in other embodiments, the number of lasers is not limited herein.
  • the number of lasers in the light source is changed to increase the laser light input stably.
  • the multiple embodiments provided in this application can replace or reduce some components in specific applications.
  • the light-conducting component does not contain the light source when it is improved.
  • the second protective element is in some sealed cavities. It may not be required in the working environment, and its heat conducting element and heat dissipation base may also be replaced by ordinary fixed structures under certain circumstances.
  • the embodiments may be replaced with each other, or some wavelengths commonly used in the market may be used.
  • the conversion device performs wavelength conversion and transmission, and is not limited here.
  • the present application increases the heat dissipation by separating the light source and the light emitting body and installing the first protection element on the other end of the light emitting body away from the light incident side.
  • the area reduces the need for heat dissipation, and enables the laser to be transmitted back and forth in the luminous body, enhancing the thermal stability inside the luminous body, thereby increasing the luminous efficiency, avoiding direct laser light, greatly enhancing the luminous efficiency, and improving practicability .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention concerne un dispositif d'éclairage (10) comprenant une source de lumière (11), un moyen d'éclairage (13) et un premier élément de protection (14). La source de lumière (11) est utilisée pour émettre un laser; le moyen d'éclairage (13) est utilisé pour recevoir le laser émis par la source de lumière (11) et réaliser une conversion de longueur d'onde pour former une lumière d'éclairage; le moyen d'éclairage (13) comprend une extrémité d'entrée de lumière et une extrémité inférieure opposée à l'extrémité d'entrée de lumière; une surface de sortie de lumière du moyen d'éclairage (13) est disposée sur une surface latérale entre l'extrémité d'entrée de lumière et l'extrémité inférieure; le premier élément de protection (14) recouvre la surface externe de l'extrémité inférieure du moyen d'éclairage (13), pour une utilisation afin d'empêcher la lumière du moyen d'éclairage (13) de sortir de l'extrémité inférieure. Il est possible d'empêcher le laser de sortir directement, de telle sorte que la sécurité et la dissipation de chaleur soient améliorées.
PCT/CN2019/076654 2018-07-26 2019-03-01 Dispositif d'éclairage WO2020019714A1 (fr)

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CN201810836620.7 2018-07-26

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CN108361566A (zh) * 2017-01-25 2018-08-03 深圳市绎立锐光科技开发有限公司 一种光源装置

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JP5781838B2 (ja) * 2010-08-25 2015-09-24 スタンレー電気株式会社 車両用の光源装置および灯具
US8833975B2 (en) * 2010-09-07 2014-09-16 Sharp Kabushiki Kaisha Light-emitting device, illuminating device, vehicle headlamp, and method for producing light-emitting device
JP2013080638A (ja) * 2011-10-04 2013-05-02 Harison Toshiba Lighting Corp 集合線状照明装置およびその駆動方法、並びに灯具
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CN101714741A (zh) * 2009-11-25 2010-05-26 山东大学 一种侧向发光的激光柱光源
CN103791455A (zh) * 2014-02-14 2014-05-14 京东方科技集团股份有限公司 侧边式背光模组及其制作方法、显示装置
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