WO2022116630A1 - Dispositif de source de lumière - Google Patents

Dispositif de source de lumière Download PDF

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Publication number
WO2022116630A1
WO2022116630A1 PCT/CN2021/117643 CN2021117643W WO2022116630A1 WO 2022116630 A1 WO2022116630 A1 WO 2022116630A1 CN 2021117643 W CN2021117643 W CN 2021117643W WO 2022116630 A1 WO2022116630 A1 WO 2022116630A1
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WO
WIPO (PCT)
Prior art keywords
light source
laser light
wavelength conversion
mounting surface
source device
Prior art date
Application number
PCT/CN2021/117643
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English (en)
Chinese (zh)
Inventor
唐怀
段艳松
Original Assignee
深圳市中光工业技术研究院
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Publication of WO2022116630A1 publication Critical patent/WO2022116630A1/fr

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    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G02B27/0961—Lens arrays
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0977—Reflective elements

Definitions

  • the present invention relates to the field of optical technology, and in particular, to a light source device.
  • Laser-excited phosphor technology to form white light is widely used in lighting and display applications, such as vehicle lamps, street lamps, and projection devices.
  • existing technical solutions for integrating multiple lasers to excite phosphors to emit white light most of them use multiple laser chips to independently package, then perform light integration, and finally excite the phosphors to generate white light.
  • This kind of light source package has a huge packaging structure. , The problem of low integration, it is difficult to meet the demand.
  • the purpose of the embodiments of the present invention is to provide a light source device to solve the above problems.
  • the embodiments of the present invention achieve the above objects through the following technical solutions.
  • Embodiments of the present invention provide a light source device, including a housing, a laser light source assembly, a light guide assembly, and a wavelength conversion element.
  • the housing is provided with an accommodating cavity, and the housing includes a step mounting portion, the step mounting portion is located in the accommodating cavity and includes a plurality of steps, and each step includes a step mounting surface.
  • the laser light source assembly is mounted on a plurality of step mounting surfaces.
  • the light guide assembly is mounted on the step mounting portion, and guides the laser light emitted by the laser light source assembly to emit in a predetermined direction.
  • the wavelength conversion element receives the laser light guided and emitted by the light guide assembly, and converts part of the incident laser light into received laser light. The received laser light and the unconverted laser light are combined to form white light and then emitted from the wavelength conversion element.
  • the housing includes a bottom plate and a side plate connected to the bottom plate, the bottom plate and the side plate enclose a receiving cavity, the step mounting portion is provided on the bottom plate, the side plate is provided with a mounting hole communicating with the receiving cavity, and the wavelength conversion element Install in the mounting hole.
  • the side plate includes an inner surface located in the receiving cavity and a first mounting surface located in the mounting hole
  • the mounting hole includes a first mounting hole and a second mounting hole that communicate with each other, and the diameter of the second mounting hole is larger than The diameter of the first mounting hole, the first mounting hole penetrates through the inner surface and the first mounting surface, and the wavelength conversion element is mounted on the first mounting surface.
  • the wavelength conversion element includes a wavelength conversion body, a functional film layer and a metal layer, the functional film layer and the metal layer are both disposed on the wavelength conversion body, the metal layer surrounds the functional film layer, the functional film layer and the first mounting hole Correspondingly, the wavelength conversion body is mounted on the first mounting surface through the metal layer.
  • the wavelength conversion body includes a transparent body and a phosphor connected to each other, the functional film layer and the metal layer are located on the side of the transparent body away from the phosphor, and the phosphor corresponds to the functional film layer.
  • the mounting hole further includes a third mounting hole communicating with the second mounting hole, the third mounting hole and the first mounting hole are respectively located on both sides of the second mounting hole, and the diameter of the third mounting hole is larger than that of the first mounting hole.
  • the light source device further includes a collecting lens
  • the side plate further includes a second mounting surface located in the mounting hole, the second mounting hole penetrates the first mounting surface and the second mounting surface, and the collecting lens is mounted on the second mounting surface.
  • the housing includes a bottom plate, a side plate and a cover plate, the cover plate is opposite to the bottom plate, the side plate is connected between the bottom plate and the cover plate, the bottom plate and the side plate enclose a receiving cavity, and the cover plate closes the receiving cavity
  • the step mounting part is provided on the bottom plate, the cover plate is provided with a mounting hole communicating with the receiving cavity, the wavelength conversion element is mounted in the mounting hole, and the light source device also includes a laser reflector, and the laser reflector is provided on the laser beam emitted by the light guide assembly. On the optical path, it is used to reflect the laser light to the wavelength conversion element.
  • the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are installed on the plurality of stepped mounting surfaces in a one-to-one correspondence, and the plurality of laser light source elements are disposed on the same side of the light guide assembly.
  • the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are installed on the plurality of stepped mounting surfaces in a one-to-one correspondence, and the laser light source elements on two adjacent stepped mounting surfaces are arranged on the light source Opposite sides of the guide assembly.
  • the laser light source assembly includes multiple groups of laser light source elements, each group of laser light source elements includes a first laser light source element and a second laser light source element, and each step mounting surface includes a first step mounting surface and a second step mounting surface Mounting surface, the height of the second step mounting surface on each step mounting surface is greater than the height of the first step mounting surface, the first step mounting surface is located between the second step mounting surface and the light guide assembly, and the first laser light source element is mounted on the The first step mounting surface, and the second laser light source element is mounted on the second step mounting surface.
  • the light guide assembly includes a plurality of groups of slow-axis collimating lenses, each group of slow-axis collimating lenses is located between a group of laser light source elements and the wavelength conversion element, and the slow-axis collimating lenses include first and lower alignment lenses.
  • the lens area and the second lens area the first lens area is located between the first step mounting surface and the second lens area, the focal length of the second lens area is greater than the focal length of the first lens area, and the laser light emitted by the first laser light source element passes through the second lens area.
  • a lens area is incident on the wavelength conversion element, and the laser light emitted by the second laser light source element is incident on the wavelength conversion element through the second lens area.
  • the light guide assembly includes a plurality of groups of guide guides, a light homogenizer and a focusing lens, each group of guide guides includes a collimating lens and a reflecting element, and the laser passes through the collimating lens of the collimating lens and the reflecting element in turn. The reflection, the homogenization of the homogenizer and the focusing of the focusing lens are incident on the wavelength conversion element.
  • the light source device includes a casing, a laser light source assembly, a light guide assembly and a wavelength conversion element.
  • the wavelength conversion element converts part of the incident laser light into the received laser light, and the received laser light and the unconverted laser light are combined to form white light and then emitted from the wavelength conversion element.
  • the volume of the device improves the integration degree of the light source device.
  • FIG. 1 is a schematic structural diagram of a light source device provided by a first embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of the light source device (excluding the cover plate) provided by the first embodiment of the present invention under one viewing angle.
  • FIG. 3 is a schematic structural diagram of the light source device (excluding the cover plate) provided by the first embodiment of the present invention from another viewing angle.
  • FIG. 4 is a schematic structural diagram of a mounting hole provided by the first embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a collimating lens provided by an implementation manner of the first embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of the wavelength conversion element provided by the first embodiment of the present invention under one viewing angle.
  • FIG. 7 is a schematic structural diagram of the wavelength conversion element provided by the first embodiment of the present invention from another viewing angle.
  • FIG. 8 is a schematic structural diagram of a wavelength conversion element provided by an implementation manner of the first embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a light source device (excluding a cover plate) provided by a second embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a light source device (excluding a cover plate) provided by a third embodiment of the present invention under one viewing angle.
  • FIG. 11 is a schematic structural diagram of a light source device (excluding a cover plate) provided by a third embodiment of the present invention from another viewing angle.
  • FIG. 12 is a schematic structural diagram of a slow-axis collimating lens provided by a third embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a light source device (excluding a cover plate) provided by a fourth embodiment of the present invention.
  • an embodiment of the present invention provides a light source device 1 , which includes a housing 10 , a laser light source assembly 20 , a light guide assembly 30 and a wavelength conversion element 40 .
  • the housing 10 is provided with a receiving cavity 11 .
  • the laser light source assembly 20 is accommodated in the accommodating cavity 11 and emits laser light.
  • the light guide assembly 30 is accommodated in the accommodating cavity 11 , and the light guide assembly 30 guides the laser light emitted by the laser light source assembly 20 to emit in a predetermined direction.
  • the wavelength conversion element 40 is mounted on the housing 10 and receives the laser light guided and emitted by the light guide assembly 30 , and converts part of the incident laser light into the received laser light, and the received laser light and the unconverted laser light are combined to form white light, and then the wavelength conversion element 40 is emitted from the wavelength conversion element 40 . shoot.
  • the casing 10 is roughly in the shape of a rectangular parallelepiped.
  • the casing 10 includes a bottom plate 12 , a side plate 13 and a cover plate 14 .
  • the cover plate 14 is opposite to the bottom plate 12 , and the side plate 13 is connected between the bottom plate 12 and the cover plate 14 .
  • the bottom plate 12 is substantially a rectangular plate-like structure, the bottom plate 12 and the side plates 13 enclose the receiving cavity 11 , and the cover plate 14 is used to close the receiving cavity 11 .
  • the bottom plate 12 is connected to the side plate 13 and protrudes out of the side plate 13 , wherein, the part of the bottom plate 12 protruding out of the side plate 13 can have a through hole, so that the fixing piece can be passed through, so that the fixing piece
  • the housing 10 can be fixed through the through holes.
  • the side plate 13 includes four plate-like structures connected end to end.
  • the side plate 13 is provided with a mounting hole 131 that communicates with the receiving cavity 11 , and the mounting hole 131 may be provided in one of the plate-like structures.
  • the mounting holes 131 may be used to mount the wavelength conversion element 40 .
  • the side plate 13 includes an inner surface 132 and an outer surface 133 , wherein the inner surface 132 is located in the receiving cavity 11 , and the outer surface 133 is opposite to the inner surface 132 .
  • the side plate 13 further includes a first mounting surface 134 and a second mounting surface 135, the first mounting surface 134 and the second mounting surface 135 are both located in the mounting hole 131, the inner surface 132, the first mounting surface 134, the second mounting surface 135 Surface 135 and outer surface 133 are parallel and spaced apart, with first mounting surface 134 between inner surface 132 and second mounting surface 135 between first mounting surface 134 and outer surface 133 .
  • the installation hole 131 includes a first installation hole 1311 , a second installation hole 1312 and a third installation hole 1313 that are communicated with each other.
  • the first installation hole 1311 penetrates through the inner surface 132 and the first installation surface 134 ;
  • the second installation hole 1312 penetrates through the first installation surface 134 and the second installation surface 135 , and the diameter of the second installation hole 1312 is larger than that of the first installation hole 1311 Diameter;
  • the third mounting hole 1313 and the first mounting hole 1311 are respectively located on both sides of the second mounting hole 1312 , and the diameter of the third mounting hole 1313 is larger than that of the second mounting hole 1312 .
  • the mounting holes 131 in this embodiment are stepped holes.
  • the mounting hole 131 may also be a smooth through hole, and the wavelength conversion element 40 may be mounted in the through hole by means of interference fit or adhesion.
  • the cover plate 14 is covered on the side plate 13 to close the receiving cavity 11, so that the laser light source assembly 20, the light guide assembly 30 and the like can be packaged.
  • the cover plate 14 and the side plate 13 may be hermetically sealed by parallel sealing welding.
  • the cover plate 14 can also be bonded to the side plate 13 by optical glue.
  • the housing 10 further includes a step mounting portion 16 , and the step mounting portion 16 is disposed on the bottom plate 12 and located in the receiving cavity 11 .
  • the step mounting portion 16 includes a plurality of steps 161 , each step 161 includes a step mounting surface 1612 , and the widths of two adjacent step mounting surfaces 1612 along the lengthwise extending direction D1 of the step mounting portion 16 may be the same.
  • the width of the two adjacent stepped mounting surfaces 1612 along the lengthwise extending direction D1 of the stepped mounting portion 16 is based on the fact that the multiple laser beams emitted by the laser light source assembly 20 do not interfere after being guided by the light guide assembly 30 .
  • the laser light source assembly 20 is mounted on the plurality of stepped mounting surfaces 1612 .
  • the laser light source assembly 20 includes a plurality of laser light source elements 21 , and the plurality of laser light source elements 21 are mounted on the plurality of stepped mounting surfaces 1612 in a one-to-one correspondence, and each laser light source element 21 is mounted on a stepped mounting surface.
  • the distance between the two adjacent laser light source elements 21 is the width of the two adjacent stepped mounting surfaces 1612 along the extending direction D1 of the length of the stepped mounting portion 16, and the mounting method can be through a heat sink.
  • the heat sink 50 is welded to the step mounting surface 1612, and the heat sink 50 can be SiC or AlN, or other materials with good thermal conductivity and matching thermal expansion coefficients.
  • the laser light source element 21 and the heat sink 50 can be fixed by eutectic welding, and the heat sink 50 and the step mounting surface 1612 can be fixed by welding with solder paste or preformed solder, or by sintering with nano-gold glue .
  • the number of laser light source elements 21 can be equal to the number of step mounting surfaces 1612 , and can be any number greater than 1. The specific number can be determined according to the final white light brightness (luminous flux) required to be output and the difference between wavelength conversion elements 40 Saturation and thermal quenching occur.
  • the number of laser light source elements 21 is six. In other embodiments, two or more laser light source elements 21 can also be mounted on each step mounting surface 1612 .
  • the driving manner of the plurality of laser light source elements 21 may be single driving, or may be driven in series or in parallel.
  • the plurality of laser light source elements 21 are driven in series.
  • the plurality of laser light source elements 21 in the middle can be connected by gold wires (not shown), and the laser light source elements 21 at both ends can be Use gold wires to connect to the shell pins.
  • the laser light source element 21 in this embodiment is a blue laser.
  • the wavelength of the laser may be 420nm-470nm.
  • a plurality of laser light source elements 21 are arranged on the same side of the light guide assembly 30 , which is convenient for the installation of the laser light source assembly 20 .
  • the stepped surface 1612 may be additionally provided with a stepped surface 1613 , and the stepped surface 1613 protrudes from the stepped mounting surface 1612 .
  • the light guide assembly 30 is mounted on the stepped mounting portion 16 , and specifically, the light guide assembly 30 is mounted on the plurality of stepped mounting surfaces 1612 .
  • the light guide assembly 30 may be used to guide the laser light to the wavelength conversion element 40 .
  • the light guide assembly 30 includes a light homogenizer 34 , a focusing lens 36 and a plurality of groups of guide guides 32 .
  • the homogenizing member 34 can receive the reflected laser light, homogenize the laser light, and inject the homogenized laser light into the focusing lens 36 .
  • the focusing lens 36 can receive the homogenized laser light, focus the laser light, and guide the focused laser light to the wavelength conversion element 40 .
  • each group of guide guides 32 corresponds to one laser light source element 21
  • each group of guide guides 32 includes a collimating lens 321 and a reflecting element 323 .
  • the collimating lens 321 can collimate the laser light
  • the collimated laser light can be incident on the reflective element 323 .
  • the reflection element 323 can receive the collimated laser light and reflect the laser light to the light homogenizer 34 . That is to say, the laser light emitted by each laser light source element 21 can be sequentially collimated by the collimating lens 321 , reflected by the reflective element 323 , homogenized by the light homogenizer 34 and focused by the focusing lens 36 and then incident on the wavelength conversion element 40 . .
  • the collimating lens 321 includes a fast-axis collimating lens 3212 and a slow-axis collimating lens 3214, both of which may be cylindrical mirrors.
  • the fast-axis collimating lens 3212 can perform fast-axis collimation on the laser; the slow-axis collimating lens 3214 can perform slow-axis collimation on the laser.
  • the laser light emitted from the laser light source assembly 20 may first pass through the fast-axis collimating lens 3212, and then pass through the slow-axis collimating lens 3214, so as to achieve the purpose of reducing the spot size.
  • the fast-axis collimating lens 3212 and the slow-axis collimating lens 3214 may be two independent lenses.
  • the fast-axis collimating lens 3212 and the slow-axis collimating lens 3214 can be fixed to the step mounting portion 16 by UV glue. Considering that the fast-axis collimating lens 3212 is relatively sensitive to position, the fast-axis collimating lens 3212 can be selected to be fixed to the front end of the laser light source element 21 . In this embodiment, both the laser incident surfaces of the fast-axis collimating lens 3212 and the slow-axis collimating lens 3214 can be coated with an AR film (Anti-reflective, anti-reflection film) corresponding to the laser wavelength (eg, 420nm-470nm) to reduce the End face reflection reduces the loss of laser light on the optical path.
  • an AR film Anti-reflective, anti-reflection film
  • the fast-axis collimating lens 3212 and the slow-axis collimating lens 3214 may also be integrated, and the fast-axis collimating lens 3212 and the slow-axis collimating lens 3214 may be two cylindrical lenses, respectively. end face.
  • the reflection element 323 is located between the collimating lens 321 and the light homogenizer 34 , and the reflection element 323 can reflect the laser light to the light homogenizer 34 .
  • the propagation direction of the laser light is changed by the reflective element 323 , so that the multiple laser beams incident on the light homogenizer 34 overlap in the horizontal direction, wherein the horizontal direction is parallel to the plane where the base plate 12 is located.
  • the reflective element 323 may be a reflective mirror, and an HR film (High reflective, high reflective film) corresponding to the laser wavelength may also be coated on the optical surface of the reflective mirror to achieve maximum reflection efficiency.
  • the reflective element 323 can also be fixed to the step mounting portion 16 by UV glue, and the exact position of the reflective element 323 on the stepped mounting portion 16 can be determined by optical simulation.
  • the light homogenizer 34 is located between the reflection element 323 and the focusing lens 36 . Since the energy distribution of the laser light emitted by the laser light source element 21 obeys the Gaussian distribution, the energy distribution of the light spot after collimation by the fast collimating lens 321 and the slow-axis collimating lens 3214 is still high in the center, and high energy may cause too much heat generation , it is easy to cause reliability problems such as decrease in excitation efficiency of the wavelength conversion element 40 and thermal quenching of the wavelength conversion element 40 .
  • the homogenizing member 34 can evenly distribute the energy of the laser beam on the surface, so that the laser energy distribution finally hit on the wavelength conversion element 40 is uniform, so as to maximize the excitation efficiency of the wavelength conversion element 40, and at the same time avoid the laser center energy.
  • the homogenizing member 34 is a fly-eye lens, and the fly-eye lens may be two single-sided fly-eye lenses, or one double-sided fly-eye lens.
  • the light homogenizer 34 may also be a diffusing sheet or a diffusing sheet.
  • the two end faces of the fly-eye lens can also be coated with AR film corresponding to the laser wavelength.
  • the fly-eye lens can also be fixed on the step mounting portion 16 by UV glue, and the exact position of the fly-eye lens can also be determined by optical simulation.
  • the light homogenizer 34 may also be a homogenizer sheet.
  • the focusing lens 36 converges the laser light, and through the focusing of the focusing lens 36, the laser beam can be combined in a vertical direction, and the vertical direction is perpendicular to the plane where the base plate 12 is located.
  • the opposite end faces of the focusing lens 36 may also be coated with an AR film corresponding to the laser wavelength, so as to reduce the end face reflection.
  • the focusing lens 36 may also be adhered and fixed to the step mounting portion 16 by UV glue.
  • the wavelength conversion element 40 can be located at the focal point of the focusing lens 36 , so that the combined laser light can be focused on the wavelength conversion element 40 .
  • the wavelength conversion element 40 is mounted in the mounting hole 131 , specifically, the wavelength conversion element 40 is mounted on the first mounting surface 134 .
  • the wavelength conversion element 40 includes a wavelength conversion body 41 , a functional film layer 43 and a metal layer 45 , and the functional film layer 43 and the metal layer 45 are located on the side of the transparent body 411 away from the phosphor 413 .
  • the wavelength conversion body 41 can be mounted on the first mounting surface 134 of the housing 10 through the metal layer 45 .
  • the welding of the wavelength conversion body 41 and the casing 10 can not only seal the accommodating cavity 11, but also the heat emitted by the wavelength conversion element 40 can also be transferred to the casing 10 and dissipated to the external environment through the casing 10, which is conducive to wavelength conversion. Element 40 dissipates heat.
  • the wavelength conversion body 41 can convert the incident laser light into excitation light, and can also be used to combine the excitation light and the unconverted laser light, so that the wavelength conversion element 40 can emit white light.
  • the metal layer 45 is disposed on the wavelength conversion body 41 and surrounds the functional film layer 43 .
  • the metal layer 45 can be used for soldering the wavelength conversion body 41 to the first mounting surface 134 .
  • the metal layer 45 may be TiPtAu (titanium platinum) material, or may be other weldable metal composite materials, and the metal layer 45 may be plated by any method of evaporation, sputtering, electroplating, and electroless plating. on the wavelength conversion body 41 .
  • the metal layer 45 can also be soldered on the first mounting surface 134 through a preformed solder tab, and the material of the solder tab can be 80Au20Sn.
  • a layer of 80Au20Sn can also be pre-plated on the surface of TiPtAu, so that the wavelength conversion body 41 can be sealed and welded directly with the casing 10 without adding materials, which can simplify the operation process and improve the consistency of the product.
  • other sealing and fixing methods can also be used between the wavelength conversion body 41 and the casing 10 , such as low-temperature glass glue sealing.
  • the functional film layer 43 is disposed on the wavelength conversion body 41 , and the functional film layer 43 can be plated on the wavelength conversion body 41 .
  • the functional film layer 43 corresponds to the first mounting hole 1311 to selectively transmit or reflect the incident laser light.
  • the functional film layer 43 can transmit blue light (wavelength 420nm-470nm) with an incident angle within 16°, blue light (wavelength 420nm-470nm) and other fluorescence (wavelength 470nm-700nm) with an incident angle greater than 16° Reflection, transmittance and reflectance are based on the maximum values that can be achieved by the coating.
  • the inventors found that, compared with those without the functional film layer 43, the light output of the light source device 1 coated with the functional film layer 43 is approximately doubled, which greatly improves the output light efficiency.
  • the wavelength conversion body 41 includes a transparent body 411 and a phosphor 413 that are connected to each other.
  • the material of the transparent body 411 may be sapphire or other optical glass.
  • the transparent body 411 is circular. In other embodiments, the transparent body 411 may also be a square or other polygons.
  • the phosphor 413 corresponds to the functional film layer 43 , so that the laser light can be directly incident on the phosphor 413 after being transmitted by the functional film layer 43 .
  • the size of the phosphor 413 may be consistent with the size of the laser spot incident on the phosphor 413, or may be larger than the size of the laser spot.
  • the phosphor 413 may emit Lambertian light.
  • the phosphor 413 is formed of phosphors and inorganic materials.
  • the phosphors can be YAG phosphors with high heat resistance, or other phosphors such as LAG phosphors, ⁇ Sialon phosphors, etc.
  • the correlated color temperature and color coordinate requirements of the white light to be output can be achieved by adjusting the content of the phosphor in the phosphor 413 and the thickness of the phosphor 413 in addition to the yellow and green phosphors with different emission spectra.
  • Inorganic materials can be alumina ceramics with better thermal properties, or glass-like materials.
  • the phosphor 413 may also be a fluorescent single crystal.
  • the phosphor 413 formed of an inorganic material has better heat and light resistance and better reliability than the phosphor 413 formed of an organic material.
  • phosphor 413 is circular. In other embodiments, the phosphor 413 may also be a square or other polygons.
  • the wavelength conversion element 40 can also be directly fired from phosphor powder, alumina ceramic powder and a binder that will volatilize during sintering.
  • One side is polished and a functional film layer 43 is plated at the middle position, and a metal layer 45 is welded on the periphery of the functional film layer 43 .
  • the wavelength conversion element 40 can also be formed into an integrated structure by uniformly mixing phosphor powder, alumina ceramic powder and a binder that will volatilize during sintering into a slurry, uniformly smearing it on the sapphire, and then sintering at high temperature.
  • the light source device 1 further includes a collecting lens 60 , and the collecting lens 60 is mounted on the second mounting surface 135 .
  • the collection lens 60 can collect the Lambertian light from the phosphor 413 and output it at a specific angle, such as 120°, or other angles.
  • the specific light output angle can be realized by different designs of the collection lens 60 according to actual needs. .
  • it can be realized by combining the improvement of the NA (Numerical Aperture, numerical aperture) value of the collection lens 60 and the diameter of the collection lens 60, which is specifically designed according to actual requirements.
  • the collecting lens 60 can also be fixed on the second mounting surface 135 by using UV glue.
  • UV glue Of course, other kinds of glues can also be used for fixing.
  • two opposite optical surfaces of the collecting lens 60 may be coated with AR films in the full wavelength range of visible light (420nm-700nm) to reduce end surface reflection.
  • the light source device 1 may further include pins 70 , the pins 70 are connected to the side board 13 , and the pins 70 and the side board 13 may be insulated and sealed by an insulator , the insulator can be made of low temperature glass material or ceramic material.
  • the pin 70 can be used for an external power supply to power on the laser light source assembly 20 .
  • the number of the pins 70 is two, and the two pins 70 are installed on the same side of the side plate 13 .
  • the light source device 1 includes a casing 10 , a laser light source assembly 20 , a light guide assembly 30 and a wavelength conversion element 40 .
  • the casing 10 is provided with a receiving cavity 11
  • the laser light source assembly 20 is installed in a plurality of receiving cavities 11 .
  • the wavelength conversion element 40 converts the incident part of the laser light into the received laser light, and the received laser light and the unconverted laser light are combined to form white light and then emitted from the wavelength conversion element 40.
  • the components 40 are packaged into one body, which reduces the volume of the light source device 1 and improves the integration degree of the light source device 1 .
  • this embodiment provides a light source device 2 .
  • the laser light source elements 21 on two adjacent stepped mounting surfaces 1612 are disposed on opposite sides of the light guide assembly 30 .
  • the fast-axis collimating lens 3212 , the slow-axis collimating lens 3214 and the reflective element 323 are also adjusted accordingly to ensure that the laser light emitted by each laser light source element 21 is collimated by the collimating lens 321 and reflected by the reflective element 323
  • the laser beam can also be combined in the vertical direction, that is, the same beam effect as the first embodiment can be achieved.
  • the light source device 2 can disperse the heat emitted by the laser light source elements 21 by arranging the laser light source elements 21 on the two adjacent stepped mounting surfaces 1612 on opposite sides of the light guide assembly 30 .
  • heat dissipation can be more conducive to the heat dissipation of the laser light source element 21 and reduce the junction temperature of the laser light source element 21, which can not only improve the luminous efficiency of the laser light source element 21, increase the light output, but also improve the quality of the light source device 2.
  • prolonging the life of the light source device 2; or under the same junction temperature working conditions the external heat dissipation conditions can be reduced, and the cost of the client products can be directly saved.
  • Each stepped mounting surface 31 includes a first stepped mounting surface 312 and a second stepped mounting surface 313 .
  • the height of the second step mounting surface 313 on the step mounting surface 31 is greater than the height of the first step mounting surface 312, and the height difference between the second step mounting surface 313 and the first step mounting surface 312 on the same step mounting surface 31, It is advisable that the laser does not interfere in the vertical direction after being collimated by the fast axis.
  • the height of the first step mounting surface 312 on the two adjacent step mounting surfaces 31 is greater than the height of the second step mounting surface 313, and the first step mounting surface 312 and the second step mounting surface on the two adjacent step mounting surfaces 31
  • the height difference of 313 is based on the fact that there is no interference in the vertical direction after the laser is reflected by the reflective element 33 .
  • the first step mounting surface 312 is located between the second step mounting surface 313 and the light guide assembly 30 .
  • the laser light source assembly 35 includes multiple groups of laser light source elements 351, each group of laser light source elements 351 includes a first laser light source element 3512 and a second laser light source element 3514, wherein the first laser light source element 3512 is mounted on the first step mounting surface 312, The second laser light source element 3514 is mounted on the second step mounting surface 313 .
  • the number of the first step mounting surface 312 and the second step mounting surface 313 is three, and the number of the first laser light source element 3512 and the second laser light source element 3514 is both three.
  • the light guide assembly 30 in this embodiment includes multiple groups of slow-axis collimating lenses 37 , each group of slow-axis collimating lenses 37 is located between a group of laser light source elements 351 and the wavelength conversion element 39 , and each group of laser light source elements 351 has a The first laser light source element 3512 and the second laser light source element 3514 share one slow-axis collimating lens 37 .
  • the slow-axis collimating lens 37 includes a first lens area 371 and a second lens area 372 arranged up and down, wherein the first lens area 371 is located on the first step mounting surface 312 and the second lens area 372 between.
  • the laser light emitted by the first laser light source element 3512 is incident on the wavelength conversion element 39 through the first lens region 371
  • the laser light emitted by the second laser light source element 3514 is incident on the wavelength conversion element 39 through the first lens area 371.
  • the two-lens region 372 is incident on the wavelength conversion element 39 .
  • the first laser light source element 3512 is closer to the slow-axis collimating lens 37 than the second laser light source element 3514, that is, the first The optical paths of the laser light emitted by the laser light source element 3512 and the second laser light source element 3514 to the slow-axis collimating lens 37 are different, and there is an optical path difference.
  • the distance D2 between the first laser light source element 3512 and the second laser light source element 3514 of each group of laser light source elements 351 is based on satisfying the heat dissipation requirements of the laser light source element 351, and the optical path difference between the two should be as small as possible.
  • the light path of the light source device 3 is as short as possible to reduce light energy loss.
  • the optical path of the laser light emitted by the first laser light source element 3512 is relatively short, so the first lens area 371 can be made into a mirror surface with a smaller focal length, for example, can be made into a concave-convex shape, and the collimation effect is the same as that of each group of laser light.
  • the length dimension of the light spot incident on the reflection element 33 by the laser light emitted by the first laser light source element 3512 and the second laser light source element 3514 of the light source element 351 shall be the same.
  • the laser light path emitted by the second laser light source element 3514 is relatively long, and the focal length of the second lens area 372 is greater than the focal length of the first lens area 371.
  • the second lens area 372 can be made into a plano-convex shape.
  • the laser light source assembly 35 and the wavelength conversion element 39 are packaged together, the first laser light source element 3512 is mounted on the first step mounting surface 312, and the second laser light source element 3514 is mounted on the first step mounting surface 312.
  • the two-step mounting surface 313 shortens the optical path length of the light source device 3 , reduces the volume of the light source device 3 , improves the integration degree of the light source device 3 , and makes the light source device 3 more competitive.
  • this embodiment provides a light source device 4 .
  • the mounting holes 431 in this embodiment are provided on the cover plate 44 .
  • the light source device 4 further includes a laser reflector 46 , and the laser reflector 46 is disposed on the optical path of the laser light emitted through the light guide assembly 30 for reflecting the laser light to the wavelength conversion element 40 .
  • the laser reflector 46 is arranged on the optical path of the laser light emitted by the light guide assembly 30 to reflect the laser light to the wavelength conversion element 40, thereby realizing the ejection mode of the light source device 4,
  • the laser light source assembly 20 and the wavelength conversion element 40 are packaged into one body, which reduces the volume of the light source device 4 and improves the integration degree of the light source device 4 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

L'invention concerne un dispositif de source de lumière (1), comprenant un boîtier (10), un ensemble source de lumière laser (20), un ensemble de guidage de lumière (30), et un élément de conversion de longueur d'onde (40). Le boîtier (10) est pourvu d'une cavité de réception (11), le boîtier (10) comprend une partie de montage en gradin (16), la partie de montage en gradin (16) est située dans la cavité de réception (11) et comprend une pluralité d'étapes (161), et chaque étape (161) comprend une surface de montage en gradin (1612). L'ensemble source de lumière laser (20) est monté sur une pluralité de surfaces de montage en gradin (1612). L'ensemble de guidage de lumière (30) est monté sur la partie de montage en gradin (16) et guide la lumière laser émise par l'ensemble source de lumière laser (20) à émettre dans une direction prédéterminée. L'élément de conversion de longueur d'onde (40) reçoit la lumière laser guidée et émise par l'ensemble guide de lumière (30) et convertit une partie de la lumière laser incidente en lumière excitée, et la lumière excitée est combinée à la lumière laser non convertie pour former une lumière blanche, puis la lumière blanche est émise à partir de l'élément de conversion de longueur d'onde (40). L'ensemble source de lumière laser (20) et l'élément de conversion de longueur d'onde (40) sont encapsulés en une seule pièce, réduisant le volume du dispositif de source de lumière (1), et améliorant l'intégration du dispositif de source de lumière (1).
PCT/CN2021/117643 2020-12-01 2021-09-10 Dispositif de source de lumière WO2022116630A1 (fr)

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CN202011388040.X 2020-12-01
CN202011388040.XA CN114578574A (zh) 2020-12-01 2020-12-01 光源装置

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CN217004310U (zh) * 2022-01-12 2022-07-19 深圳市绎立锐光科技开发有限公司 激光光源装置及照明系统

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CN104221233A (zh) * 2012-03-26 2014-12-17 西铁城控股株式会社 激光光源装置及激光光源装置的制造方法
CN104836119A (zh) * 2015-05-26 2015-08-12 深圳市创鑫激光股份有限公司 光纤耦合激光器
CN109154425A (zh) * 2016-05-13 2019-01-04 松下知识产权经营株式会社 光源装置以及照明装置
CN109424943A (zh) * 2017-07-05 2019-03-05 深圳光峰科技股份有限公司 波长转换装置和激光荧光转换型光源
CN209448216U (zh) * 2019-03-08 2019-09-27 深圳市星汉激光科技有限公司 一种激光复合光源
CN213750521U (zh) * 2020-12-01 2021-07-20 深圳市中光工业技术研究院 光源装置

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US20130163621A1 (en) * 2011-12-22 2013-06-27 Electronics And Telecommunication Research Institute External cavity tunable laser module
CN104221233A (zh) * 2012-03-26 2014-12-17 西铁城控股株式会社 激光光源装置及激光光源装置的制造方法
CN104836119A (zh) * 2015-05-26 2015-08-12 深圳市创鑫激光股份有限公司 光纤耦合激光器
CN109154425A (zh) * 2016-05-13 2019-01-04 松下知识产权经营株式会社 光源装置以及照明装置
CN109424943A (zh) * 2017-07-05 2019-03-05 深圳光峰科技股份有限公司 波长转换装置和激光荧光转换型光源
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CN213750521U (zh) * 2020-12-01 2021-07-20 深圳市中光工业技术研究院 光源装置

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