Laser module

Abstract

The utility model discloses a laser module, which relates to the technical field of optical illumination and comprises a mounting seat, a light source component and a light emitting component. The mounting seat forms a mounting surface; the light source assembly is arranged on the mounting face and can emit colored laser in the direction away from the mounting base. The light emitting assembly comprises a wavelength conversion piece arranged on the side, away from the mounting base, of the light source assembly, and the wavelength conversion piece and the light source assembly are correspondingly arranged so that color laser emitted by the light source assembly can be converted into white laser to be emitted. The laser module provided by the utility model is high in energy density and high in electro-optical conversion efficiency, the energy density of emitted laser is higher than the energy density generated by an LED, and the laser module has a farther irradiation distance.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lighting, in particular to a laser module. Background Art

[0002] With the advancement of automotive lighting technology, matrix LED (Light Emitting Diode) light sources have been widely used, especially for longer-range illumination (compared to low-beam headlights). However, matrix LED light sources have low energy density and limited illumination distance.

[0003] Therefore, how to enhance the illumination intensity of the light source and increase the illumination distance is an urgent problem to be solved in this field. Utility Model Content

[0004] The main purpose of the utility model is to provide a laser module, aiming to provide a laser module with high energy density and long irradiation distance.

[0005] To achieve the above-mentioned purpose, the laser module proposed in the present invention includes a mounting seat, a light source assembly and a light output assembly; the mounting seat forms a mounting surface; the light source assembly is arranged on the mounting surface, and the light source assembly can emit colored laser in a direction away from the mounting seat; the light output assembly includes a wavelength conversion component arranged on the side of the light source assembly away from the mounting seat, and the wavelength conversion component is arranged corresponding to the light source assembly to convert the colored laser emitted by the light source assembly into white laser and then output the light.

[0006] In one embodiment, a plurality of light source assemblies are provided, a plurality of wavelength conversion elements are provided, and the plurality of wavelength conversion elements are provided in a one-to-one correspondence with the plurality of light source assemblies.

[0007] In one embodiment, the mounting seat includes a mounting plate, which is bent in a direction away from the light-emitting component so that the mounting surface is arranged in an arc shape; a plurality of wavelength conversion components form a plurality of light-emitting column groups arranged in a transverse direction, and each light-emitting column group includes a plurality of wavelength conversion components arranged in a longitudinal direction, and the plurality of wavelength conversion components of adjacent light-emitting column groups are alternately arranged in the longitudinal direction to be tightly arranged.

[0008] In one embodiment, a plurality of light source assemblies corresponding to the wavelength conversion elements in the light output column group form a light source group corresponding to the light output column group; the light source group includes a plurality of light source column groups arranged in a transverse direction, each light source column group includes a plurality of light source assemblies arranged in a longitudinal direction, and the light source assemblies of adjacent light source column groups are alternately arranged in the longitudinal direction to be tightly arranged.

[0009] In one embodiment, the mounting base is at least partially made of a heat-conducting material, and / or a first groove is formed on the mounting surface for mounting the light source assembly.

[0010] In one embodiment, the incident angle of the colored laser light emitted by the light source assembly on the wavelength conversion element is α, and 45°≤α≤85°.

[0011] In one embodiment, the light source assembly includes a light source component and a focusing mirror; the light source component is mounted on the mounting surface to emit colored laser light; the focusing mirror is disposed between the light source component and the wavelength conversion component to focus the colored laser light.

[0012] In one embodiment, the light emitting component also includes a light emitting plate and a light homogenizer; the light emitting plate is formed with a plurality of second grooves facing away from the mounting seat for mounting a wavelength conversion component, and a through hole is provided at the bottom of each second groove; the light homogenizer is arranged in the second groove to transmit the colored laser.

[0013] In one embodiment, the aperture of at least a portion of the through hole is gradually increased in a direction from the wavelength conversion element toward the mounting seat.

[0014] In one embodiment, the light output assembly further includes a pillar, one end of which is fixedly connected to the mounting seat, and the other end of which extends away from the mounting seat and is connected to the light output plate.

[0015] The technical solution of the present invention is to install a light source assembly through a mounting base, and emit colored laser through the light source assembly. When the colored laser is irradiated on the wavelength conversion component, a part of it is absorbed by the wavelength conversion component, and the other part passes through the wavelength conversion component. The absorbed colored laser excites a colored laser of another wavelength on the wavelength conversion component. The excited colored laser and the colored laser that passes through the wavelength conversion component are mixed to form a white laser and then emitted. The energy density of the laser is higher than the energy density generated by the LED, and it has a longer irradiation distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of an embodiment of a laser module provided by the present utility model;

[0018] Figure 2 for Figure 1 Side view of the laser module;

[0019] Figure 3 for Figure 1 Schematic diagram of the corresponding relationship between the middle light emitting component and the light emitting component;

[0020] Figure 4 for Figure 1 Schematic diagram of the colored laser light path emitted by the laser module;

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the center light-emitting component.

[0022] Description of Figure Numbers:

[0023] 100. Laser module; 1. Mounting seat; 11. Mounting plate; 2. Light source assembly; 21. Light source component; 22. Focusing mirror; 3. Light output assembly; 31. Light output plate; 311. Second groove; 312. Through hole; 32. Pillar; 33. Light homogenizer; 34. Wavelength converter; 35. Window mirror.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] At slightly longer distances (compared to low beam headlights), matrix LED light sources can arbitrarily shut off individual light paths, avoiding objects that don't need to be illuminated, achieving intelligent lighting, and reducing glare. However, matrix LED light sources have two drawbacks: low energy density, resulting in a large optical system and limited illumination distance; and high material consistency requirements, concentrated heat, and a relatively short service life. Compared to LED light sources, light sources using laser-excited white lasers offer the advantages of high energy density and electro-optical conversion efficiency. Especially at high energy densities, the efficiency can be over 10 times that of LED light sources.

[0029] Based on this, the present invention proposes a laser module 100. Figure 1 and Figure 2 In one embodiment of the present invention, the laser module 100 includes a mounting base 1, a light source assembly 2 and a light output assembly 3; the mounting base 1 forms a mounting surface; the light source assembly 2 is arranged on the mounting surface, and the light source assembly 2 can emit colored laser light in a direction away from the mounting base 1; the light output assembly 3 includes a wavelength conversion component 34 arranged on a side of the light source assembly 2 away from the mounting base 1, and the wavelength conversion component 34 is arranged corresponding to the light source assembly 2 to convert the colored laser emitted by the light source assembly 2 into white laser light for output.

[0030] The technical solution of the present invention is to install the light source assembly 2 through the mounting seat 1, and emit colored laser through the light source assembly 2. When the colored laser is irradiated on the wavelength conversion component 34, a part of it is absorbed by the wavelength conversion component 34, and the other part passes through the wavelength conversion component 34. The absorbed colored laser excites a colored laser of another wavelength on the wavelength conversion component 34. The excited colored laser is mixed with the colored laser that passes through the wavelength conversion component 34 to form a white laser and then emitted. The laser has the advantages of high energy density and high electro-optical conversion efficiency. Its energy density is higher than the energy density generated by LED, and it has a longer irradiation distance.

[0031] In one embodiment, the light source assembly 2 outputs a blue laser with a wavelength of 450 nm, and the wavelength converter 34 is a fluorescent ceramic having a thickness of 0.05-0.15 mm. The fluorescent ceramic absorbs part of the blue laser light and converts it into yellow laser light. The yellow laser light mixes with the unabsorbed blue laser light to form a white light output. The fluorescent ceramic is prepared through a series of processes, including mixing, molding, and sintering raw materials containing phosphors. The raw materials include compounds of rare earth elements (such as europium, cerium, and terbium), which can absorb light of specific wavelengths and re-emit light of different wavelengths.

[0032] In another embodiment, the light source assembly 2 includes a single TO9 (Transistor Outline 9) packaged excitation light source, a standardized metalized package widely used in high-power semiconductor devices, to emit colored laser light. The colored laser light is focused and irradiated onto the wavelength conversion element 34 to output white laser light. In another embodiment, to enhance the intensity of the white laser light, the light source assembly 2 includes three or more TO9 packaged excitation light sources. Through beam shaping, the excitation light sources are converged into a single spot, which is then irradiated onto a wavelength conversion element 34 to output higher-power white laser light.

[0033] When the light source assembly 2 emits colored laser light and the wavelength conversion element 34 is irradiated by high-power laser light, heat is generated. Therefore, it is necessary to take into account the heat dissipation performance while ensuring the energy density. Based on this, in one embodiment of the present invention, a plurality of light source assemblies 2 are provided, and a plurality of wavelength conversion elements 34 are provided. The plurality of wavelength conversion elements 34 are provided in a one-to-one correspondence with the plurality of light source assemblies 2. In this way, the plurality of light source assemblies 2 emit colored laser light, so that the laser module 100 has a higher energy density; the corresponding light source assemblies 2 and the wavelength conversion element 34 constitute the laser element, and the plurality of independent light source assemblies 2 emit colored laser light respectively. The plurality of colored laser beams are irradiated on the corresponding wavelength conversion element 34 respectively. The laser elements emit light separately and convert the light, so that the heat is dispersed, thereby effectively dissipating heat to extend the service life of the material; and one or more laser elements can be turned off at will to avoid objects that do not need to be illuminated, reduce glare, and realize intelligent lighting. Furthermore, each laser element can individually control the intensity of its light output.

[0034] Compared with LED light sources, the volume of the light source assembly 2 that emits laser light is larger, which makes the volume of the laser module 100 larger and difficult to meet the small volume requirements of, for example, vehicle lighting. Figure 3 and Figure 4 In one embodiment of the present invention, the mounting base 1 includes a mounting plate 11 that curves away from the light output assembly 3, resulting in a curved mounting surface. Multiple wavelength conversion components 34 form multiple light output arrays arranged horizontally. Each light output array includes multiple wavelength conversion components 34 arranged vertically. The wavelength conversion components 34 of adjacent light output arrays are alternately arranged vertically to form a dense arrangement. This curved mounting surface creates a spatial layout for the laser module 100, with a larger area at the end of the light source assembly 2 and a smaller area at the end of the wavelength conversion components 34. This provides a larger mounting space for the larger light source assembly 2, while allowing the multiple wavelength conversion components 34 to be densely arranged, reducing the volume of the light output assembly 3.

[0035] The mounting plate 11 can be bent by heat bending or assembled from multiple rectangular plates spliced ​​at an angle. There are at least two light output column groups, each of which includes at least two wavelength conversion elements 34 arranged longitudinally. In other words, the multiple wavelength conversion elements 34 are arranged two-dimensionally, with a minimum of two rows and two columns. Furthermore, two rows and 6-84 columns can be used. Each wavelength conversion element 34 is defined as corresponding to one pixel. A higher number of pixels indicates a more precise area of ​​controlled illumination, and can be 9 pixels, 16 pixels, 84 pixels, and so on.

[0036] Furthermore, the light source assembly 2 and the wavelength converter 34 are spaced apart to disperse heat, and the relative size of the laser module 100 at one end of the light source assembly 2 and at one end of the wavelength converter 34 can be adjusted by increasing or decreasing the spacing distance.

[0037] The larger the pixel size, the more wavelength conversion elements 34 there are, the more light source assemblies 2 corresponding to the wavelength conversion elements 34 there are, and the larger the volume of the laser module 100 located at one end of the light source assembly 2. In one embodiment of the present invention, the multiple light source assemblies 2 corresponding to the wavelength conversion elements 34 in the light output column group form a light source group corresponding to the light output column group; the light source assembly 2 includes multiple light source column groups arranged in a horizontal direction, each light source column group includes multiple light source assemblies 2 arranged in a vertical direction, and the light source assemblies 2 of adjacent light source column groups are arranged alternately in the vertical direction to form a dense arrangement. In this way, the multiple light source assemblies 2 corresponding to the wavelength conversion elements 34 in each light output column group are arranged in a two-dimensional arrangement, so that as many assemblies as possible can be accommodated within the same space, thereby more precisely controlling the illumination.

[0038] Among them, the multiple wavelength conversion components 34 of adjacent light output column groups are alternately arranged in a close arrangement along the longitudinal direction, and the light source components 2 of adjacent light source column groups are alternately arranged in a close arrangement along the longitudinal direction. In other words, the multiple wavelength conversion components 34 or the multiple light source components 2 are arranged in an "S" shape, and the multiple wavelength conversion components 34 or the multiple light source components 2 in a single row are arranged linearly.

[0039] See also Figure 5 , Figure 5 The light source assembly 2A corresponds to the wavelength conversion element 34A, the light source assembly 2B corresponds to the wavelength conversion element 34B, the light source assembly 2C corresponds to the wavelength conversion element 34C, and the light source assembly 2D corresponds to the wavelength conversion element 34D. Figure 5 Only an example with 8 wavelength conversion elements 34 is shown in the figure. The present invention can also be extended in the horizontal or vertical direction, and the number can be the number required by the design.

[0040] In one embodiment of the present invention, the mounting base 1 is at least partially made of a heat-conducting material. Thus, the mounting base 1 acts as a heat sink, rapidly conducting and dissipating the heat generated by the light source assembly 2 to the surrounding environment, thereby maintaining the temperature of the laser module 100 within a safe range, ensuring its normal operation and extending its service life.

[0041] It should be noted that the thermal conductive material is a type of material used to improve heat transfer efficiency, such as aluminum, copper or other materials; and the mounting plate 11 can be set to aluminum, copper or other materials.

[0042] In one embodiment of the present invention, a first groove is formed on the mounting surface for mounting the light source assembly 2. This increases the contact area between the light source assembly 2 and the mounting base 1, thereby improving the heat dissipation efficiency of the light source assembly 2.

[0043] There may be multiple grooves to install multiple light source assemblies 2 , and the multiple grooves are arranged in a staggered manner, corresponding to the multiple light source assemblies 2 .

[0044] In one embodiment of the present invention, the incident angle α of the colored laser light emitted by the light source assembly 2 on the wavelength converter 34 is 45°≤α≤85°. This ensures that the multiple light source assemblies 2 do not interfere with each other and that the light spot incident on the wavelength converter 34 is substantially circular, resulting in a good light output effect.

[0045] In one embodiment of the present invention, the light source assembly 2 includes a light source component 21 and a focusing lens 22; the light source component 21 is installed on the mounting surface to emit colored laser light; the focusing lens 22 is disposed between the light source component 21 and the wavelength conversion component 34 to focus the colored laser light.

[0046] The light source 21 may be a blue semiconductor laser, a gas laser or other lasers, and the focusing lens 22 may be an aspheric convex lens, which has a simple process and is easy to install.

[0047] Furthermore, the light source assembly 2 further includes a sleeve, which is installed on the installation surface to surround the light source 21 , and the focusing lens 22 is installed at an opening of the sleeve.

[0048] See also Figure 1 and Figure 5 In one embodiment of the present invention, the light output assembly 3 further includes a light output plate 31 and a light diffuser 33. The light output plate 31 is formed with multiple second grooves 311 facing away from the mounting base 1 for mounting a wavelength converter 34. Each second groove 311 has a through-hole 312 at its bottom. The light diffuser 33 is disposed within the second grooves 311 to transmit the colored laser light. This allows colored laser light that is not incident perpendicularly to the wavelength converter 34 to be evenly dispersed by the light diffuser 33 before reaching the wavelength converter 34. This results in a more uniform light intensity distribution for the colored laser light, improving the uniformity and softness of the final output light.

[0049] Specifically, when the wavelength converter 34 is installed in the second groove 311 , the wavelength converter 34 is bonded into the second groove 311 using conductive silver glue.

[0050] When the laser module 100 has multiple wavelength conversion components 34 , the second groove 311 can be set to one, and multiple wavelength conversion components 34 are sintered and installed in the second groove 311 . The second groove 311 can also be set to multiple to correspond to the installation of the wavelength conversion components 34 .

[0051] Furthermore, the light emitting assembly 3 further includes a window mirror 35 . The window mirror 35 is disposed at one end of the light emitting plate 31 away from the mounting seat 1 , and is used to seal and protect the wavelength conversion component 34 .

[0052] In one embodiment of the present invention, the aperture of at least a portion of the through hole 312 is gradually increased in diameter from the wavelength conversion element 34 toward the mounting base 1 , so as to ensure that the colored laser light is not blocked by the light emitting plate 31 .

[0053] In one embodiment of the present invention, the light output assembly 3 further includes a support 32, one end of which is fixedly connected to the mounting base 1, and the other end of which extends away from the mounting base 1 and is connected to the light output plate 31. Thus, the support 32 secures the mounting base 1 and the light output assembly 3, ensuring that the distance between the mounting base 1 and the wavelength converter 34 remains relatively constant, thereby ensuring that the diameter of the light spot formed by each colored laser beam reaching the wavelength converter 34 is substantially consistent.

[0054] Specifically, the support 32 and the laser heat sink are fixed with screws. The support 32 and the mounting plate 11 form a bracket. The bracket is made of a material with good thermal conductivity such as copper and aluminum.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A laser module, characterized in that: include: A mounting seat forming a mounting surface; a light source assembly, disposed on the mounting surface, capable of emitting colored laser light in a direction away from the mounting seat; as well as, The light output component includes a wavelength conversion component arranged on the side of the light source component away from the mounting seat. The wavelength conversion component is arranged corresponding to the light source component to convert the colored laser emitted by the light source component into white laser for output.

2. The laser module according to claim 1, wherein: There are a plurality of light source assemblies, and a plurality of wavelength conversion components. The wavelength conversion components are arranged in a one-to-one correspondence with the light source assemblies.

3. The laser module according to claim 2, wherein: The mounting seat includes a mounting plate, and the mounting plate is bent in a direction away from the light output component so that the mounting surface is arranged in an arc shape; The multiple wavelength conversion elements form multiple light output column groups arranged along the transverse direction. Each light output column group includes multiple wavelength conversion elements arranged along the longitudinal direction. The multiple wavelength conversion elements of adjacent light output column groups are alternately arranged along the longitudinal direction to be closely arranged.

4. The laser module according to claim 3, wherein: A plurality of light source assemblies corresponding to the wavelength conversion elements in the light output column group form a light source group corresponding to the light output column group; The light source group includes a plurality of light source column groups arranged in a transverse direction, each of the light source column groups includes a plurality of light source components arranged in a longitudinal direction, and the light source components of adjacent light source column groups are alternately arranged in a longitudinal direction to be closely arranged.

5. The laser module according to any one of claims 1 to 4, wherein: The mounting seat is at least partially made of a heat-conducting material, and / or a first groove is formed on the mounting surface for mounting the light source assembly.

6. The laser module according to any one of claims 1 to 4, wherein: The incident angle of the colored laser light emitted by the light source assembly on the wavelength conversion component is α, and 45°≤α≤85°.

7. The laser module according to any one of claims 1 to 4, wherein: The light source assembly comprises: a light source component, mounted on the mounting surface, for emitting the colored laser; and A focusing mirror is disposed between the light source component and the wavelength conversion component to focus the colored laser light.

8. The laser module according to any one of claims 1 to 4, wherein: The light output component further includes: A light emitting plate is formed with a plurality of second grooves away from the mounting seat for mounting the wavelength conversion element, and a through hole is formed at the bottom of each second groove; and The light homogenizer is disposed in the second groove to transmit the colored laser.

9. The laser module according to claim 8, wherein: In a direction from the wavelength conversion component toward the mounting seat, the aperture of at least a portion of the through hole is gradually increased.

10. The laser module according to claim 8, wherein: The light emitting assembly further comprises a pillar, one end of which is fixedly connected to the mounting seat, and the other end of which extends away from the mounting seat and is connected to the light emitting plate.

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