CN213750521U

CN213750521U - Light source device

Info

Publication number: CN213750521U
Application number: CN202022870298.5U
Authority: CN
Inventors: 唐怀; 段艳松
Original assignee: Shenzhen Zhongguang Industrial Technology Research Institute
Current assignee: Shenzhen Zhongguang Industrial Technology Research Institute
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-07-20
Anticipated expiration: 2030-12-01

Abstract

An embodiment of the utility model provides a light source device, including casing, laser light source subassembly, light guide subassembly and wavelength conversion component. The casing is equipped with and accepts the chamber, and the casing includes the step installation department, and the step installation department is located and accepts the intracavity to including a plurality of steps, every step includes the step installation face. The laser light source assembly is arranged on the mounting surfaces of the steps. The light guide assembly is mounted on the step mounting portion and guides laser emitted by the laser light source assembly to be emitted in a predetermined direction. The wavelength conversion element receives the laser guided and emitted by the light guide assembly, converts part of the incident laser into stimulated laser, and emits the stimulated laser and unconverted laser after being combined to form white light from the wavelength conversion element. The utility model provides a light source device includes casing, laser light source subassembly, light guide subassembly and wavelength conversion component, through encapsulating laser light source subassembly and wavelength conversion component in an organic whole, has reduced light source device's volume, has promoted light source device's integrated level.

Description

Light source device

Technical Field

The utility model relates to the field of optical technology, particularly, relate to a light source device.

Background

White light formed by laser-excited phosphor technology is widely used in lighting and display applications, such as vehicle lights, street lights, projection devices, and the like. In the existing technical scheme of emitting white light by a plurality of lasers integrated and excited fluorophors, a plurality of laser chips are adopted for independent packaging, then light integration is carried out, and finally the exciting fluorophors are deactivated to generate white light.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a light source device to solve above-mentioned problem. The embodiment of the utility model provides an above-mentioned purpose is realized through following technical scheme.

An embodiment of the utility model provides a light source device, including casing, laser light source subassembly, light guide subassembly and wavelength conversion component. The casing is equipped with and accepts the chamber, and the casing includes the step installation department, and the step installation department is located and accepts the intracavity to including a plurality of steps, every step includes the step installation face. The laser light source assembly is arranged on the mounting surfaces of the steps. The light guide assembly is mounted on the step mounting portion and guides laser emitted by the laser light source assembly to be emitted in a predetermined direction. The wavelength conversion element receives the laser guided and emitted by the light guide assembly, converts part of the incident laser into stimulated laser, and emits the stimulated laser and unconverted laser after being combined to form white light from the wavelength conversion element.

In one embodiment, the housing comprises a bottom plate and a side plate connected with the bottom plate, the bottom plate and the side plate define an accommodating cavity, the step mounting portion is arranged on the bottom plate, the side plate is provided with a mounting hole communicated with the accommodating cavity, and the wavelength conversion element is mounted in the mounting hole.

In one embodiment, the side plate comprises an inner surface located in the accommodating cavity and a first mounting surface located in the mounting hole, the mounting hole comprises a first mounting hole and a second mounting hole which are communicated, the aperture of the second mounting hole is larger than that 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.

In one embodiment, 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 disposed on the wavelength conversion body, the metal layer surrounds the functional film layer, the functional film layer corresponds to the first mounting hole, and the wavelength conversion body is mounted on the first mounting surface through the metal layer.

In one embodiment, the wavelength conversion body comprises a transparent body and a phosphor connected with each other, the functional film layer and the metal layer are located on a side of the transparent body facing away from the phosphor, and the phosphor corresponds to the functional film layer.

In one embodiment, the mounting hole further includes a third mounting hole communicated with the second mounting hole, the third mounting hole and the first mounting hole are respectively located on two sides of the second mounting hole, the aperture of the third mounting hole is larger than that of the second 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 through the first mounting surface and the second mounting surface, and the collecting lens is mounted on the second mounting surface.

In one embodiment, 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 to form an accommodation cavity, the cover plate seals the accommodation cavity, the step mounting portion is disposed on the bottom plate, the cover plate is provided with a mounting hole communicated with the accommodation cavity, the wavelength conversion element is mounted in the mounting hole, and the light source device further includes a laser reflector disposed on a light path of laser emitted from the light guide assembly for reflecting the laser to the wavelength conversion element.

In one embodiment, the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are mounted on the plurality of step 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.

In one embodiment, the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are mounted on the plurality of step mounting surfaces in a one-to-one correspondence, and the laser light source elements on two adjacent step mounting surfaces are disposed on two opposite sides of the light guide assembly.

In one embodiment, the laser light source assembly includes a plurality of 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, each step mounting surface includes a first step mounting surface and a second step 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, the first laser light source element is mounted on the first step mounting surface, and the second laser light source element is mounted on the second step mounting surface.

In one embodiment, the light guide assembly includes a plurality of sets of slow-axis collimating lenses, each set of slow-axis collimating lenses is located between one set of laser light source elements and the wavelength conversion element, each slow-axis collimating lens includes a first lens region and a second lens region arranged up and down, the first lens region is located between the first step mounting surface and the second lens region, the focal length of the second lens region is greater than that of the first lens region, laser light emitted by the first laser light source elements is incident on the wavelength conversion element through the first lens region, and laser light emitted by the second laser light source elements is incident on the wavelength conversion element through the second lens region.

In one embodiment, the light guiding assembly includes a plurality of groups of guiding members, a light homogenizing member and a focusing lens, each group of guiding members includes a collimating lens and a reflecting element, and the laser light is incident to the wavelength conversion element after being collimated by the collimating lens, reflected by the reflecting element, homogenized by the light homogenizing member and focused by the focusing lens in sequence.

Compared with the prior art, the utility model provides a light source device includes the casing, laser light source subassembly, light guide subassembly and wavelength conversion component, the casing is equipped with accepts the chamber, laser light source subassembly is installed in a plurality of step installation faces of accepting the intracavity, wavelength conversion component will incidenting partial laser conversion receive laser, and it jets out from wavelength conversion component after laser and the laser that does not convert closed light formation white light, through encapsulating laser light source subassembly and wavelength conversion component in an organic whole, light source device's volume has been reduced, light source device's integrated level has been promoted.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a light source device according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a light source device (not including a cover plate) provided in a first embodiment of the present invention at a viewing angle.

Fig. 3 is a schematic structural diagram of a light source device (not including a cover plate) provided in another viewing angle according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a mounting hole according to a first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a collimating lens according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a wavelength conversion device according to a first embodiment of the present invention at a viewing angle.

Fig. 7 is a schematic structural diagram of a wavelength conversion device according to another view angle according to the first embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a wavelength conversion element according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a light source device (not including a cover plate) according to a second embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a light source device (not including a cover plate) provided in a third embodiment of the present invention at a viewing angle.

Fig. 11 is a schematic structural diagram of a light source device (not including a cover plate) according to another viewing angle according to a third embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a slow-axis collimating lens according to 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 (not including a cover plate) according to a fourth embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the embodiments of the present invention, the embodiments of the present invention will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

First embodiment

Referring to fig. 1, 2 and 3, an embodiment of the invention provides a light source apparatus 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 chamber 11. The laser light source assembly 20 is accommodated in the accommodating chamber 11 and emits laser light. The light guide unit 30 is accommodated in the accommodating chamber 11, and the light guide unit 30 guides the laser light emitted from the laser light source unit 20 to be emitted in a predetermined direction. The wavelength conversion element 40 is attached to the housing 10, receives the laser light guided by the light guide unit 30 and emitted therefrom, converts a part of the incident laser light into a received laser light, and emits the received laser light and the unconverted laser light from the wavelength conversion element 40 after combining them into white light.

In the present embodiment, the housing 10 has a substantially rectangular parallelepiped structure. The housing 10 includes a bottom plate 12, side plates 13, and a cover plate 14. Wherein 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 rectangular plate-shaped, the bottom plate 12 and the side plate 13 enclose a containing cavity 11, and the cover plate 14 is used for closing the containing cavity 11. In this embodiment, the bottom plate 12 is connected to the side plate 13 and protrudes out of the side plate 13, wherein a through hole may be formed in a portion of the bottom plate 12 protruding out of the side plate 13, so that the fixing member may penetrate through the through hole to fix the housing 10.

The side plates 13 comprise four plate-like structures connected end to end. The side plate 13 is provided with a mounting hole 131 communicating with the receiving cavity 11, and the mounting hole 131 may be provided in one of the plate-shaped structures. In this embodiment, the mounting hole 131 may be used to mount the wavelength converting element 40.

Referring to fig. 2 and 4, 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. In addition, 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 and the outer surface 133 are arranged in parallel and spaced apart, the first mounting surface 134 is located between the inner surface 132 and the second mounting surface 135, and the second mounting surface 135 is located between the first mounting surface 134 and the outer surface 133.

In this embodiment, the mounting holes 131 include a first mounting hole 1311, a second mounting hole 1312, and a third mounting hole 1313 that communicate with each other. Wherein the first mounting hole 1311 penetrates the inner surface 132 and the first mounting surface 134; a second mounting hole 1312 penetrates the first and second mounting surfaces 134 and 135, and the second mounting hole 1312 has a larger aperture than the first mounting hole 1311; third mounting hole 1313 and first mounting hole 1311 are respectively located at both sides of second mounting hole 1312, and third mounting hole 1313 has a larger hole diameter than second mounting hole 1312. That is, the mounting hole 131 in the present embodiment is a stepped hole. In other embodiments, the mounting hole 131 may also be a smooth through hole, and the wavelength converting element 40 may be mounted in the through hole by interference fit or bonding.

Referring to fig. 1 and 2, the cover plate 14 covers the side plate 13 to enclose the receiving cavity 11, so as to encapsulate the laser source assembly 20, the light guide assembly 30, and the like. In the present embodiment, the cover plate 14 and the side plate 13 may be hermetically sealed by parallel sealing. In other embodiments, the cover plate 14 may be bonded to the side plate 13 by an optical adhesive.

Referring to fig. 2 and 3, 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. Specifically, the step mounting portion 16 includes a plurality of steps 161, each step 161 includes a step mounting surface 1612, and widths of adjacent two step mounting surfaces 1612 in the direction D1 in which the length of the step mounting portion 16 extends may be the same. The width of each of the two adjacent step mounting surfaces 1612 along the direction D1 along the length of the step mounting portion 16 is determined such that a plurality of laser beams emitted from the laser light source assembly 20 are guided by the light guide assembly 30 without interference.

Laser light source assemblies 20 are mounted to a plurality of stepped mounting surfaces 1612. In this embodiment, the laser light source assembly 20 includes a plurality of laser light source elements 21, the plurality of laser light source elements 21 are mounted on the plurality of step mounting surfaces 1612 in a one-to-one correspondence, and on the basis that each laser light source element 21 is mounted at the middle position of one step mounting surface 1612, the distance between two adjacent laser light source elements 21 is the width of two adjacent step mounting surfaces 1612 along the length extension direction D1 of the step mounting portion 16, where the mounting manner may be that the heat sink 50 is welded to the step mounting surfaces 1612, and the heat sink 50 may be SiC or AlN, or another material with good thermal conductivity and matching thermal expansion coefficient. Specifically, the laser light source element 21 and the heat sink 50 may be fixed by eutectic soldering, and the heat sink 50 and the step mounting surface 1612 may be fixed by soldering with solder paste or a solder pre-formed piece, or by sintering with nanogold. In this embodiment, the number of the laser light source elements 21 may be equal to the number of the step mounting surfaces 1612, and may be any number greater than 1, and the specific number may be determined according to the brightness (luminous flux) of the white light to be output and the non-saturation and thermal quenching of the wavelength conversion element 40. In the present embodiment, the number of laser light source elements 21 is six. In other embodiments, each step mounting surface 1612 may also mount two or more laser light source elements 21.

The plurality of laser light source elements 21 may be driven individually, or may be driven in series or in parallel. In this embodiment, the plurality of laser light source elements 21 are driven in series, specifically, the plurality of laser light source elements 21 in the middle may be connected by gold wires (not shown), and the laser light source elements 21 at the two ends may be connected by gold wires and package pins. The laser light source element 21 of the present embodiment is a blue laser, and as an example, the wavelength of the laser may be 420nm to 470 nm. The plurality of laser light source elements 21 are disposed on the same side of the light guide assembly 30, which facilitates the installation of the laser light source assembly 20.

In other embodiments, the step mounting surface 1612 may be further provided with a step surface 1613, the step surface 1613 protrudes from the step mounting surface 1612, and the plurality of laser light source elements 21 may be mounted on the plurality of step surfaces 1613 in one-to-one correspondence.

The light guide assembly 30 is mounted to the step mounting portion 16, and specifically, the light guide assembly 30 is mounted to a plurality of step mounting surfaces 1612. The light directing assembly 30 may be used to direct laser light to the wavelength converting element 40. In the present embodiment, the light guide assembly 30 includes a light uniformizer 34, a focusing lens 36 and a plurality of sets of guides 32, and the guides 32 are used for guiding the laser light emitted from the laser light source element 21 to the light uniformizer 34 and the focusing lens 36. The light uniformizer 34 may receive the reflected laser light, uniformize the laser light, and introduce the uniformized laser light to the focusing lens 36. The focusing lens 36 may receive the homogenized laser light, focus the laser light, and guide the focused laser light to the wavelength conversion element 40.

In the present embodiment, each set of guides 32 corresponds to one laser light source element 21, and each set of guides 32 includes one collimating lens 321 and one reflecting element 323. Specifically, the collimator lens 321 may collimate the laser light and make the collimated laser light incident to the reflective element 323. The reflective element 323 can receive the collimated laser light and reflect the laser light to the integrator 34. That is, the laser light emitted from each laser light source element 21 may be incident on the wavelength conversion element 40 after being collimated by the collimating lens 321, reflected by the reflecting element 323, homogenized by the homogenizing device 34, and focused by the focusing lens 36 in sequence.

The collimating lens 321 includes a fast axis collimating lens 3212 and a slow axis collimating lens 3214, and both the fast axis collimating lens 3212 and the slow axis collimating lens 3214 may be cylindrical lenses. The fast axis collimating lens 3212 can perform fast axis collimation on the laser; the slow axis collimating lens 3214 may perform slow axis collimation on the laser light. The laser emitted from the laser source assembly 20 can pass through the fast axis collimating lens 3212 first and then pass through the slow axis collimating lens 3214, so as to achieve the purpose of small light spot. In this embodiment, 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 may be fixed to the step mount 16 by UV glue bonding. Considering that the fast axis collimating lens 3212 is sensitive to position, the fast axis collimating lens 3212 may be optionally fixed to the front end of the laser light source element 21. In this embodiment, the laser light incident surfaces of the fast axis collimating lens 3212 and the slow axis collimating lens 3214 may be coated with an Anti-reflective (AR) film corresponding to the laser wavelength (e.g., 420nm to 470nm) to reduce the end reflection and reduce the loss of the laser light on the optical path.

Referring to fig. 5, in other embodiments, the fast axis collimating lens 3212 and the slow axis collimating lens 3214 may be integrally disposed, and the fast axis collimating lens 3212 and the slow axis collimating lens 3214 may be two end surfaces of a cylindrical mirror, respectively.

The reflecting element 323 is located between the collimating lens 321 and the light unifying member 34, and the reflecting element 323 can reflect the laser light to the light unifying member 34. The reflecting element 323 changes the propagation direction of the laser light, so that a plurality of laser lights incident on the light uniformizing part 34 are overlapped in the horizontal direction, wherein the horizontal direction is parallel to the plane of the bottom plate 12.

The reflecting element 323 may be a mirror, and an HR film (High reflective film) corresponding to a laser wavelength may be coated on an optical surface of the mirror to achieve maximum reflection efficiency. The reflective element 323 may also be adhesively secured to the step mount 16 by UV glue, and the exact position of the reflective element 323 on the step mount 16 may be determined by optical simulation.

The light homogenizer 34 is located between the reflective element 323 and the focusing lens 36. Because the energy distribution of the laser emitted by the laser source element 21 follows gaussian distribution, the energy distribution of the collimated light spot passing through the fast collimating lens 321 and the slow collimating lens 3214 is still central, and the high energy may cause too large heat generation, which may easily cause the reliability problems such as reduction of the excitation efficiency of the wavelength conversion element 40 and thermal quenching of the wavelength conversion element 40. The light uniformizer 34 can uniformize the energy of the laser beam on the surface distribution, so that the laser energy finally impinging on the wavelength conversion element 40 is uniformly distributed, thereby maximizing the excitation efficiency of the wavelength conversion element 40, and simultaneously avoiding the problem of too large heat generation caused by too high central energy of the laser. In this embodiment, the light uniformizing element 34 is a fly-eye lens, and two single-sided fly-eye lenses or one double-sided fly-eye lens may be used as the fly-eye lens. In other embodiments, the light unifying member 34 may also be a diffuser sheet or a diffuser sheet.

The two end faces of the fly-eye lens can also be plated with AR films corresponding to the laser wavelength. The fly-eye lens may also be fixed to the step mounting 16 by UV glue, and the exact position of the fly-eye lens may also be determined by optical simulation. In other embodiments, the light homogenizing member 34 can also be a homogenizing plate.

The focusing lens 36 focuses the laser light, and the laser light can be combined in the vertical direction perpendicular to the plane of the base plate 12 through the focusing of the focusing lens 36. In this embodiment, the opposite end faces of the focusing lens 36 may also be coated with AR films corresponding to the laser wavelength to reduce end reflection. The focusing lens 36 may also be adhesively secured to the step mount 16 by UV glue.

Referring to fig. 4, 6 and 7, the wavelength conversion element 40 may be located at a focal point of the focusing lens 36 to facilitate the combined laser light to converge on the wavelength conversion element 40. The wavelength converting element 40 is mounted in the mounting hole 131, and specifically, the wavelength converting element 40 is mounted to 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 a side of the transparent body 411 facing away from the phosphor 413.

In the present embodiment, the wavelength converting body 41 may be mounted to the first mounting surface 134 of the housing 10 through the metal layer 45. The welding of the wavelength conversion body 41 and the housing 10 not only can seal the accommodating cavity 11, but also can transfer heat emitted by the wavelength conversion element 40 to the housing 10, and the heat is dissipated to the external environment through the housing 10, which is beneficial to the heat dissipation of the wavelength conversion element 40. The wavelength conversion body 41 can convert the incident laser light into excitation light, and can also be used for combining the excitation light and unconverted laser light, so that the wavelength conversion element 40 can emit white light.

A metal layer 45 is disposed on the wavelength converting body 41 and surrounds the functional film layer 43, the metal layer 45 may be used for soldering of the wavelength converting body 41 to the first mounting surface 134. In this embodiment, the metal layer 45 may be a TiPtAu (titanium platinum gold) material, or may be another metal composite material that can be soldered, and the metal layer 45 may be plated on the wavelength conversion body 41 by any one of evaporation, sputtering, electroplating, and chemical plating. The metal layer 45 may also be soldered to the first mounting surface 134 by means of a pre-formed solder tab, which may be 80Au20 Sn. Besides soldering by soldering lugs, a layer 80Au20Sn can be pre-plated on the TiPtAu surface, so that the wavelength conversion body 41 can be directly sealed and soldered with the shell 10 without adding materials, the operation process can be simplified, and the consistency of products can be improved. In other embodiments, it is needless to say that other sealing and fixing methods, such as a low-temperature glass cement sealing method, may be adopted between the wavelength conversion body 41 and the housing 10.

The functional film layer 43 is disposed on the wavelength conversion body 41, and the functional film layer 43 may 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 incident laser light. As an example, the functional film 43 can transmit blue light with an incident angle of 16 ° (420 nm-470nm wavelength), and reflect blue light with an incident angle of more than 16 ° (420 nm-470nm wavelength) and other fluorescence (470 nm-700nm wavelength), and the transmittance and reflectance are determined according to the maximum value that can be achieved by the coating film. The inventor finds that, compared with the light source device 1 without the functional film 43, the light output of the light source device 1 coated with the functional film 43 is increased by about one time, and the output light efficiency is greatly improved.

In the present embodiment, the wavelength conversion body 41 includes a transparent body 411 and a phosphor 413 connected to each other.

The transparent body 411 may be made of sapphire or other optical glass. In an embodiment, the transparent body 411 is circular. In other embodiments, the transparent body 411 may also be square or other polygonal.

The phosphor 413 corresponds to the functional film layer 43 so that the laser light can be directly incident to the phosphor 413 after being transmitted through the functional film layer 43. The size of the phosphor 413 may be equal to or larger than the size of the laser spot incident on the phosphor 413. The phosphor 413 may emit lambertian light. The phosphor 413 is formed of a phosphor and an inorganic material, and the phosphor may be YAG phosphor having high heat resistance, or other phosphors such as LAG phosphor and α sialon phosphor; it should be noted that, in order to meet the requirements of the white light output and the color coordinates, the phosphor may be yellow powder and green powder with different emission spectra, or the content of the phosphor in the phosphor 413 and the thickness of the phosphor 413 may be adjusted. The inorganic material may be alumina ceramic with better thermal performance or glass material. The phosphor 413 may be a single fluorescent crystal, and the phosphor 413 made of an inorganic material has better heat resistance and light resistance than the phosphor 413 made of an organic material, and has better reliability. In an embodiment, the phosphor 413 is circular. In other embodiments, the phosphor 413 may also be square or other polygonal shape.

Referring to fig. 8, in another embodiment, the wavelength conversion element 40 may be formed by directly firing a phosphor powder, an alumina ceramic powder and a binder that volatilizes during firing, polishing one surface of the fired phosphor, plating a functional film 43 in the middle, and welding a metal layer 45 to the periphery of the functional film 43. The wavelength conversion member 40 may also be formed in an integrated structure by uniformly mixing phosphor powder with alumina ceramic powder and a binder that volatilizes when sintered into a slurry, uniformly coating on sapphire, and then sintering at a high temperature.

With reference to fig. 4, the light source device 1 further includes a collecting lens 60, and the collecting lens 60 is mounted on the second mounting surface 135. By providing the collecting lens 60, the use of the client is facilitated and the optical system and the production process of the product of the client are simplified. The collection lens 60 can collect the lambertian light from the phosphor 413 and output the light at a specific angle, such as 120 °, or other angles, such as a specific light-emitting angle, can be implemented by different designs of the collection lens 60 according to actual requirements. In order to improve the collecting efficiency of the collecting lens 60, it can be realized by combining the improvement of NA (Numerical Aperture) value of the collecting lens 60 and the diameter of the collecting lens 60, and the design is specifically made according to the practical requirement. The collection lens 60 may also be secured to the second mounting surface 135 using a UV glue, although other types of glues may be used. In order to increase the light transmittance of the collecting lens 60, the opposite optical surfaces of the collecting lens 60 may be coated with AR films of the full wavelength range of visible light (420nm-700nm) to reduce the end reflection.

Referring to fig. 1 and fig. 2, in the present embodiment, the light source device 1 may further include a pin 70, the pin 70 is connected to the side plate 13, and the pin 70 and the side plate 13 may be insulated and sealed by an insulator, and the insulator may be made of a low-temperature glass material or a ceramic material. Pin 70 may be used to externally power source to energize laser light source assembly 20. In the present embodiment, the number of the pins 70 is two, and the two pins 70 are mounted on the same side of the side plate 13.

To sum up, the utility model provides a light source device 1 includes casing 10, laser light source subassembly 20, light guide subassembly 30 and wavelength conversion component 40, casing 10 is equipped with and accepts chamber 11, laser light source subassembly 20 is installed in a plurality of step installation faces 1612 of accepting in the chamber 11, wavelength conversion component 40 will incidenting partial laser conversion receive laser, and it jets out from wavelength conversion component 40 to receive laser and the laser that does not convert to synthesize behind the light formation white light, through encapsulating laser light source subassembly 20 and wavelength conversion component 40 in an organic whole, the volume of light source device 1 has been reduced, the integrated level of light source device 1 has been promoted.

Second embodiment

Referring to fig. 9, unlike the first embodiment, the present embodiment provides a light source device 2, wherein the laser light source elements 21 on two adjacent step mounting surfaces 1612 are disposed on two opposite sides of the light guiding assembly 30. The fast axis collimating lens 3212, the slow axis collimating lens 3214, and the reflecting element 323 are also adjusted accordingly, respectively, to ensure that the laser light emitted from each laser light source element 21 is also overlapped in the horizontal direction after being collimated by the collimating lens 321 and reflected by the reflecting element 323 when entering the light uniformizing element 34, and the laser light is converged by the focusing lens 36, so that the laser light can also be combined in the vertical direction, that is, the same light beam effect as the first embodiment is achieved.

To sum up, the utility model provides a light source device 2 can be with the heat dispersion that laser source element 21 sent through setting up laser source element 21 on two adjacent step installation faces 1612 in the relative both sides of light guide assembly 30, under same outside heat dissipation condition, the heat dispersion can be more favorable to laser source element 21 to dispel the heat, reduces the junction temperature of laser source element 21, not only can improve the luminous efficiency of laser source element 21, increase light output, can improve the quality of light source device 2 simultaneously, the life-span of extension light source device 2; or under the working condition of keeping the same junction temperature, the external heat dissipation condition can be reduced, and the product cost of the client side is directly saved.

Third embodiment

Referring to fig. 10 and 11, different from the first embodiment, the present embodiment provides a light source device 3, each step mounting surface 31 includes a first step mounting surface 312 and a second step mounting surface 313, the height of the second step mounting surface 313 on each 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 is suitable for preventing laser from interfering in the vertical direction after being collimated by the fast axis. The height of the first step mounting surface 312 on two adjacent step mounting surfaces 31 is greater than the height of the second step mounting surface 313, and the height difference between the first step mounting surface 312 and the second step mounting surface 313 on two adjacent step mounting surfaces 31 is determined by that no interference exists in the vertical direction after the laser is reflected by the reflecting element 33. First stepped mounting surface 312 is located between second stepped mounting surface 313 and light directing assembly 30.

The laser light source assembly 35 includes a plurality of sets of laser light source elements 351, each set of laser light source elements 351 including 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, and the second laser light source element 3514 is mounted on the second step mounting surface 313. In the present embodiment, the number of the first step mounting surfaces 312 and the second step mounting surfaces 313 is three, and the number of the first laser light source elements 3512 and the second laser light source elements 3514 is three.

The light directing assembly 30 in this embodiment includes multiple sets of slow axis collimating lenses 37, each set of slow axis collimating lenses 37 is located between a set of laser light source elements 351 and a wavelength converting element 39, and the first laser light source element 3512 and the second laser light source element 3514 of each set of laser light source elements 351 share a single slow axis collimating lens 37.

Referring to fig. 11 and 12, 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 between the first step mounting surface 312 and the second lens area 372.

Referring to fig. 10, 11 and 12, in the present embodiment, the laser light emitted from the first laser source element 3512 enters the wavelength conversion element 39 through the first lens region 371, and the laser light emitted from the second laser source element 3514 enters the wavelength conversion element 39 through the second lens region 372. Since the first step mounting surface 312 is located between the second step mounting surface 313 and the light guide assembly 30, 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 optical paths of the laser light emitted from the first 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 front-to-back distance D2 between the first laser source element 3512 and the second laser source element 3514 of each group of laser source elements 351 preferably is as small as possible on the basis of satisfying the heat dissipation requirement of the laser source elements 351, so that the optical path length of the light source device 3 is as short as possible, and the optical energy loss is reduced.

In this embodiment, since the optical path of the laser light emitted from the first laser light source element 3512 is relatively short, the first lens region 371 may be a mirror surface with a small focal length, for example, a concave-convex shape, and the collimation effect is achieved based on the fact that the length dimensions of the spots of the laser light emitted from the first laser light source element 3512 and the second laser light source element 3514 of each group of laser light source elements 351 incident on the reflecting element 33 are the same. The optical path of the laser light emitted from the second laser source element 3514 is relatively long, and the focal length of the second lens region 372 is greater than that of the first lens region 371, for example, the second lens region 372 may be formed in a plano-convex shape.

To sum up, the utility model provides a light source device 3 is through encapsulating laser light source subassembly 35 and wavelength conversion component 39 in an organic whole to first laser source element 3512 is installed in first step installation face 312, and second laser source element 3514 is installed in second step installation face 313, has shortened light source device 3's optical path length, has reduced light source device 3's volume, has promoted light source device 3's integrated level, makes light source device 3 more have the competitiveness.

Fourth embodiment

Referring to fig. 13 and 14, unlike the first embodiment, the present embodiment provides a light source device 4. The mounting hole 431 of the present embodiment is provided in the cover plate 44.

In the present embodiment, the light source device 4 further includes a laser reflection member 46, and the laser reflection member 46 is disposed on an optical path of the laser light emitted through the light guide assembly 30, and is configured to reflect the laser light to the wavelength conversion element 40.

To sum up, the utility model provides a light source device 4 sets up on the light path of the laser of light guide assembly 30 outgoing through laser reflection spare 46 to with laser reflection to wavelength conversion element 40, realized light source device 4's ejecting optical mode, and laser light source subassembly 20 encapsulates in an organic whole with wavelength conversion element 40, has reduced light source device 4's volume, has promoted light source device 4's integrated level.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A light source device, comprising:

the shell is provided with an accommodating cavity and comprises a step mounting part, the step mounting part is positioned in the accommodating cavity and comprises a plurality of steps, and each step comprises a step mounting surface;

the laser light source assemblies are arranged on the step mounting surfaces;

the light guide assembly is arranged on the step mounting part and guides the laser emitted by the laser light source assembly to be emitted in a preset direction; and

and the wavelength conversion element receives the laser guided and emitted by the light guide assembly, converts part of incident laser into stimulated laser, and emits the stimulated laser and unconverted laser after the stimulated laser and unconverted laser are combined to form white light.

2. The light source device according to claim 1, wherein the housing includes a bottom plate and a side plate connected to the bottom plate, the bottom plate and the side plate define the accommodation cavity, the step mounting portion is provided on the bottom plate, the side plate is provided with a mounting hole communicating with the accommodation cavity, and the wavelength conversion element is mounted in the mounting hole.

3. The light source device according to claim 2, wherein the side plate includes an inner surface located in the housing 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 are communicated with each other, an aperture of the second mounting hole is larger than an aperture 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.

4. The light source device of claim 3, wherein the wavelength conversion element comprises a wavelength conversion body, a functional film layer and a metal layer, the functional film layer and the metal layer are disposed on the wavelength conversion body, the metal layer surrounds the functional film layer, the functional film layer corresponds to the first mounting hole, and the wavelength conversion body is mounted on the first mounting surface through the metal layer.

5. The light source device according to claim 4, wherein the wavelength conversion body comprises a transparent body and a phosphor connected to each other, the functional film layer and the metal layer are located on a side of the transparent body facing away from the phosphor, and the phosphor corresponds to the functional film layer.

6. The light source device according to claim 3, wherein 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, the third mounting hole has a larger diameter than the second 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 through the first mounting surface and the second mounting surface, and the collecting lens is mounted on the second mounting surface.

7. The light source device according to claim 1, wherein 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 the accommodation cavity, the cover plate closes the accommodation cavity, the step mounting portion is disposed on the bottom plate, the cover plate is provided with a mounting hole communicating with the accommodation cavity, the wavelength conversion element is mounted in the mounting hole, and the light source device further includes a laser reflector disposed on a light path of the laser emitted from the light guide assembly, for reflecting the laser to the wavelength conversion element.

8. The light source device according to any one of claims 1 to 7, wherein the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are mounted on the plurality of step 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.

9. The light source device according to any one of claims 1 to 7, wherein the laser light source assembly includes a plurality of laser light source elements, the plurality of laser light source elements are mounted on the plurality of step mounting surfaces in a one-to-one correspondence, and the laser light source elements on two adjacent step mounting surfaces are disposed on two opposite sides of the light guide assembly.

10. The light source device according to any one of claims 1 to 7, wherein the laser light source assembly includes a plurality of 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, each of the step mounting surfaces includes a first step mounting surface and a second step mounting surface, the height of the second step mounting surface on each of the step mounting surfaces 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, the first laser light source element is mounted on the first step mounting surface, and the second laser light source element is mounted on the second step mounting surface.

11. The light source device according to claim 10, wherein the light guide assembly includes a plurality of sets of slow-axis collimating lenses, each set of slow-axis collimating lenses is located between one set of the laser light source elements and the wavelength conversion element, the slow-axis collimating lenses include a first lens region and a second lens region arranged up and down, the first lens region is located between the first step mounting surface and the second lens region, a focal length of the second lens region is greater than a focal length of the first lens region, laser light emitted by the first laser light source element is incident on the wavelength conversion element through the first lens region, and laser light emitted by the second laser light source element is incident on the wavelength conversion element through the second lens region.

12. The light source device according to any one of claims 1 to 7, wherein the light guide assembly includes a light homogenizing member, a focusing lens, and a plurality of sets of directing members, each set of directing member includes a collimating lens and a reflecting element, and the laser light is incident to the wavelength converting element after being collimated by the collimating lens, reflected by the reflecting element, homogenized by the light homogenizing member, and focused by the focusing lens in sequence.