Light source system and vehicle lamp illumination module
By using a light source system with a combination of laser modules and optical fibers in the headlight lighting module, the problems of low light collection efficiency and size limitation caused by LED light sources are solved, and more efficient optical system design and smaller module size are achieved. , while reducing heat dissipation needs and weight.
Patent Information
- Application Number
- CN202411522478.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-20
AI Technical Summary
The optical system in existing headlight lighting modules has low light collection efficiency and is difficult to reduce its size. This is mainly due to the large luminous area and luminous angle of the LED light source, resulting in limited design of the optical system.
The light source system adopts a combination of laser modules and optical fibers. The laser light is generated through the laser module and coupled to the optical fiber through a coupling device. The light-exit area and divergence angle of the optical fiber can be adjusted to improve the light collection efficiency of the vehicle light lighting module, and Reduce the size of the optical system.
It improves the light collection efficiency of the headlight lighting module, reduces the size of the optical system, reduces the heat dissipation needs, reduces the weight of the module, and increases design flexibility.
Smart Images
Figure CN119163903A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle lamps, and in particular to a light source system and a vehicle lamp lighting module. Background Art
[0002] Nowadays, automotive lamps are constantly developing in the direction of smaller sizes. For example, the size of the high and low beam modules has been reduced from the original diameter of 60mm to 40mm. Some existing ultra-narrow low beam modules are only 10mm-20mm high.
[0003] As the size of vehicle lighting modules decreases, system efficiency and light pattern width are facing great challenges, especially low system efficiency. This is because the optical system in current vehicle lighting modules is basically designed based on the light-emitting surface and light-emitting angle of LED (Light Emitting Diode), and the area of the light-emitting surface of LED light sources is usually 0.5mm 2 and 1mm 2 , limited by the size of the LED light source's emitting surface, the optical system's light collection efficiency is low; and the mainstream LED light sources on the market are usually Lambertian light sources, that is, the light intensity in all directions is uniform and stable and has nothing to do with the observation angle, so the emitting angle is large, which also leads to low light collection efficiency of the optical system. In addition, due to the large size of the LED light source's emitting surface and the large emitting angle, it is difficult to further reduce the size of the optical system in the headlight lighting module. Summary of the invention
[0004] To solve the above technical problems, the embodiments of the present application provide a light source system and a vehicle lighting module to reduce the light emitting surface area of the light source system, improve the light collecting efficiency of the vehicle lighting module, and further reduce the size of the optical system in the vehicle lighting module.
[0005] To achieve the above objectives, the present application provides the following technical solutions:
[0006] A light source system, which is applied to a vehicle lighting module, comprises a laser module, a coupling device and at least one optical fiber;
[0007] The laser module is used to generate laser;
[0008] The coupling device is used to couple the laser generated by the laser module into the optical fiber;
[0009] The first end of the optical fiber is connected to the coupling device, and the second end of the optical fiber emits a light beam.
[0010] Optionally, the end face of the second end of the optical fiber is a plane.
[0011] Optionally, the end face of the second end of the optical fiber is a convex surface.
[0012] Optionally, the convex surface is a curved surface or a folded surface.
[0013] Optionally, the cross-sectional area of the second end of the optical fiber in a plane perpendicular to the extension direction of the optical fiber is less than or equal to 0.5 mm 2 .
[0014] Optionally, a divergence angle of the light beam emitted from the second end of the optical fiber is less than or equal to 120°.
[0015] A vehicle lamp lighting module comprises a light source system, wherein the light source system is any of the light source systems described above.
[0016] Optionally, the vehicle lamp lighting module further includes an optical system, the optical system includes a reflective bowl, and the light beam emitted from the optical fiber in the light source system is reflected by the reflective bowl and then emitted.
[0017] Optionally, the vehicle lamp lighting module further includes an optical system, the optical system includes a lens module, and the light beam emitted from the optical fiber in the light source system is emitted after passing through the lens module.
[0018] Optionally, the vehicle lamp lighting module further includes an optical system, which includes a reflective bowl and a lens module, and the light beam emitted from the optical fiber in the light source system is emitted after passing through the reflective bowl and the lens module.
[0019] Compared with the prior art, the above technical solution has the following advantages:
[0020] The light source system provided in the embodiment of the present application is applied to a vehicle lighting module. The light source system includes a laser module, a coupling device and at least one optical fiber, wherein the laser module is used to generate laser, the coupling device is used to couple the laser generated by the laser module into the optical fiber, the first end of the optical fiber is connected to the coupling device, and the second end of the optical fiber emits a light beam, that is, the second end of the optical fiber is a light emitting surface. Since the light emitting surface area of the optical fiber can be smaller than the light emitting surface area of an existing LED light source, the optical coupling efficiency of the light source system applied to the vehicle lighting module is higher, and the light receiving efficiency of the vehicle lighting module can be improved.
[0021] On this basis, optionally, the light source system provided in the embodiment of the present application can be directly used as a vehicle lighting module. Specifically, different light patterns can be formed by setting the end face structure of the second end (i.e., the light outlet) of the optical fiber to meet different light shape requirements, and / or, the number of optical fibers can be set so as to utilize the combination of light beams emitted by multiple optical fibers to form the required light shape. In this way, the vehicle lighting module does not need to set up an optical system, and the light collecting efficiency of the vehicle lighting module is higher.
[0022] Alternatively, the light source system provided in the embodiment of the present application serves as a light source system in a vehicle lighting module. The vehicle lighting module also includes an optical system. The light beam emitted from the optical fiber in the light source system is emitted after passing through the optical system to form a required light shape. Since the light emitting surface area of the optical fiber can be smaller than the light emitting surface area of the existing LED light source, the optical system has a higher light collecting efficiency and the size of the optical system can be further reduced.
[0023] Regardless of whether the light source system provided in the embodiment of the present application is directly used as a vehicle lighting module or as a light source system in a vehicle lighting module, since the light source system provided in the embodiment of the present application emits a light beam through an optical fiber, on the one hand, the number of optical fibers and the position of the light emitting surface of the optical fiber can be set according to demand, which is very flexible; on the other hand, compared with the existing LED light source that needs to be configured with circuit boards, heat sinks, fans and other supporting devices, in the light source system provided in the embodiment of the present application, only one laser module and one coupling device can be set, and multiple optical fibers can be used to achieve multiple light emitting openings, and the laser module and the coupling device can be placed in a place with lower heat, so there is no need to set up heat dissipation devices such as radiators and fans, which is more friendly to heat dissipation and helps to reduce the overall weight of the vehicle lighting module. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 A schematic diagram of the structure of a light source system provided in an embodiment of the present application;
[0026] Figure 2 A partial schematic diagram of an optical fiber whose end face at the second end is a plane in the light source system provided in an embodiment of the present application;
[0027] Figure 3 for Figure 2 A schematic diagram of an end face of a second end of the optical fiber;
[0028] Figure 4a A schematic diagram of a simulation of the light shape formed when the end face of the second end of the optical fiber is a plane in the light source system provided in an embodiment of the present application;
[0029] Figure 4b A simplified schematic diagram of a light shape formed when the end face of the second end of the optical fiber is a plane in the light source system provided in an embodiment of the present application;
[0030] Figure 5 A partial schematic diagram of an optical fiber in a light source system provided in an embodiment of the present application, wherein the end face of the second end is a convex curved surface;
[0031] Figure 6 for Figure 5 A schematic diagram of an end face of a second end of the optical fiber;
[0032] Figure 7a A schematic diagram of a simulation of a light shape formed when the end face of the second end of the optical fiber is a convex curved surface in the light source system provided in an embodiment of the present application;
[0033] Figure 7b A simplified schematic diagram of a light shape formed when the end face of the second end of the optical fiber is a convex curved surface in the light source system provided in an embodiment of the present application;
[0034] Figure 8 A partial schematic diagram of an optical fiber in which the end face of the second end is a convex folded surface in the light source system provided in an embodiment of the present application;
[0035] Fig. 9 for Figure 8 A schematic diagram of an end face of a second end of the optical fiber;
[0036] Fig.10a A schematic diagram of a simulation of a light shape formed when the end face of the second end of the optical fiber is a convex folded surface in the light source system provided in an embodiment of the present application;
[0037] Fig.10b A simplified schematic diagram of a light shape formed when the end face of the second end of the optical fiber is a convex folded surface in the light source system provided in an embodiment of the present application;
[0038] Fig.11 A schematic diagram of a partial structure of a vehicle lighting module provided in an embodiment of the present application;
[0039] Fig.12 A schematic diagram of a partial structure of another vehicle lighting module provided in an embodiment of the present application;
[0040] Fig.13 A partial structural diagram of another vehicle lighting module provided in an embodiment of the present application;
[0041] Fig.14 A schematic diagram of the partial structure of another vehicle lamp lighting module provided in an embodiment of the present application. DETAILED DESCRIPTION
[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0044] As mentioned in the background technology section, in current vehicle lighting modules, the optical system is basically designed based on the light-emitting surface and light-emitting angle of the LED light source, and the area of the light-emitting surface of the LED light source is usually 0.5mm 2 and 1mm 2 , limited by the size of the LED light source's emitting surface, the optical system's light collection efficiency is low; and the mainstream LED light sources on the market are usually Lambertian light sources, that is, the light intensity in all directions is uniform and stable and has nothing to do with the observation angle, so the emitting angle is large, which also leads to low light collection efficiency of the optical system. In addition, due to the large size of the LED light source's emitting surface and the large emitting angle, it is difficult to further reduce the size of the optical system in the headlight lighting module.
[0045] In view of this, an embodiment of the present application provides a light source system, which is applied to a vehicle lighting module. Figure 1 FIG. 1 shows a schematic diagram of the structure of the light source system provided in an embodiment of the present application. Figure 1 As shown, the light source system includes a laser module 10 , a coupling device 20 and at least one optical fiber 30 .
[0046] Wherein, the laser module 10 is used to generate laser;
[0047] The coupling device 20 is used to couple the laser light generated by the laser module 10 into the optical fiber 30;
[0048] The first end of the optical fiber 30 is connected to the coupling device 20 , and the second end of the optical fiber 30 emits a light beam.
[0049] It is understandable that if Figure 1 As shown, the laser generated by the laser module 10 is coupled into the optical fiber 30 through the coupling device 20, specifically enters the optical fiber 30 from the first end connected to the coupling device 20, is transmitted in the optical fiber 30 to the second end of the optical fiber 30, and emits a light beam from the second end of the optical fiber 30.
[0050] Existing headlight modules usually include an LED light source and an optical system. The light beam emitted by the LED light source passes through the optical system to form the required light shape. As mentioned above, due to the large size of the light-emitting surface of the LED light source and the large light-emitting angle, the optical system has a low light collection efficiency. In the light source system provided in the embodiment of the present application, the laser is generated by the laser module 10, and the coupling device 20 couples the laser generated by the laser module 10 into the first end of the optical fiber 30, and then the light beam is emitted from the second end of the optical fiber 30, that is, the second end of the optical fiber 30 is the light-emitting surface. Since the light-emitting surface area of the optical fiber can be smaller than the light-emitting surface area of the existing LED light source, the optical coupling efficiency of the light source system used in the headlight module is higher, which can improve the light collection efficiency of the headlight module.
[0051] On this basis, optionally, the light source system provided in the embodiment of the present application can be directly used as a vehicle lighting module. Specifically, different light patterns can be formed by setting the end face structure of the second end (i.e., the light outlet) of the optical fiber 30 to meet different light shape requirements, and / or, the number of optical fibers 30 can be set so as to utilize the combination of light beams emitted by multiple optical fibers 30 to form the required light shape. In this way, the vehicle lighting module does not need to set up an optical system, and the light collection efficiency of the vehicle lighting module is higher.
[0052] Alternatively, the light source system provided in the embodiment of the present application serves as a light source system in a vehicle lighting module, and the vehicle lighting module also includes an optical system. The light beam emitted from the optical fiber 30 in the light source system is emitted after passing through the optical system to form a required light shape. Since the light emitting surface area of the optical fiber can be smaller than the light emitting surface area of the existing LED light source, the light collecting efficiency of the optical system is higher and the size of the optical system can be further reduced. For example, the height of the optical system can be reduced to less than 5 mm.
[0053] Regardless of whether the light source system provided in the embodiment of the present application is directly used as a vehicle lighting module or as a light source system in a vehicle lighting module, since the light source system provided in the embodiment of the present application emits a light beam through the optical fiber 30, on the first hand, the number of optical fibers 30 and the position of the light emitting surface of the optical fiber 30 can be set according to demand, which is very flexible; on the second hand, compared with the existing LED light source that needs to be configured with circuit boards, heat sinks, fans and other supporting devices, in the light source system provided in the embodiment of the present application, only one laser module 10 and one coupling device 20 can be set, and multiple optical fibers 30 can be used to achieve multiple light emitting openings, and the laser module 10 and the coupling device 20 can be placed in a place with lower heat, so that there is no need to set up heat dissipation devices such as heat sinks and fans, which is more friendly to heat dissipation and helps to reduce the overall weight of the vehicle lighting module.
[0054] Optionally, the cross-sectional area of the second end of the optical fiber 30 in a plane perpendicular to the extending direction of the optical fiber 30 is less than or equal to 0.5 mm2 , that is, the light-emitting surface area of the optical fiber 30 is less than or equal to 0.5 mm 2 For example, the light emitting surface area of the optical fiber 30 can be 0.01 mm 2 , 0.1mm 2 , 0.25mm 2 , 0.5mm 2 As known from the background technology, the area of the light emitting surface of an LED light source is usually 0.5 mm 2 and 1mm 2 In the light source system provided in the embodiment of the present application, the light emitting surface area of the optical fiber 30 is less than or equal to 0.5 mm 2 , that is, the light emitting surface area of the light source system is less than or equal to 0.5mm 2 According to optical principles, the smaller the light emitting surface area of the light source system is, the higher the optical coupling efficiency of the light source system when applied to the vehicle lighting module is, and the higher the light receiving efficiency of the vehicle lighting module is.
[0055] As described in the background technology, the LED light source has a large light-emitting angle, which is also the reason why the light-collecting efficiency of the headlight lighting module is low and the size of the optical system is difficult to further reduce. In the light source system provided in the embodiment of the present application, the end face structure of the second end (i.e., the light outlet) of the optical fiber 30 can be set so that the divergence angle of the light beam emitted from the light outlet surface of the optical fiber 30 is small. Optionally, the divergence angle of the light beam emitted from the second end of the optical fiber 30 is less than or equal to 120°. For example, the divergence angle of the light beam emitted from the second end of the optical fiber 30 can be 120°, 110°, 100°, 60°, 30°, 20°, 10°, 0°, etc., thereby further improving the light-collecting efficiency of the headlight lighting module and facilitating further reduction of the size of the optical system in the headlight lighting module.
[0056] From the above, it can be seen that by setting the end face structure of the second end (ie, the light outlet) of the optical fiber 30, different light patterns can be formed to meet different light shape requirements. It can be understood that this can also reduce the difficulty of subsequent optical system design.
[0057] Optional, such as Figure 2 and Figure 3 As shown, the end face of the second end of the optical fiber 30 is a plane, that is, the end face of the second end of the optical fiber 30 is perpendicular to the extension direction of the optical fiber 30, wherein, Figure 2 FIG. 4 shows a partial schematic diagram of an optical fiber 30 whose end face at the second end is a plane. Figure 3 Schematic diagram of the end face (plane) of the second end of the optical fiber 30 is shown. Further, Figure 4a FIG. 1 is a schematic diagram showing a simulated light shape formed when the end face of the second end of the optical fiber 30 is a plane. Figure 4bA simplified schematic diagram of the light shape formed when the end face of the second end of the optical fiber 30 is a plane is shown. It can be seen that the light shape formed when the end face of the second end of the optical fiber 30 is set as a plane is approximately circular.
[0058] Alternatively, the end surface of the second end of the optical fiber 30 is a convex surface.
[0059] For example, Figure 5 and Figure 6 As shown, the end face of the second end of the optical fiber 30 is a convex curved surface in an arched shape, wherein: Figure 5 FIG. 4 shows a partial schematic diagram of an optical fiber 30 whose end face at the second end is a convex curved surface. Figure 6 A schematic diagram of the end face (a convex curved surface) of the second end of the optical fiber 30 is shown. Further, Figure 7a FIG. 4 is a schematic diagram showing a simulated light shape formed when the end face of the second end of the optical fiber 30 is a convex curved surface. Figure 4b A simplified schematic diagram of the light shape formed when the end face of the second end of the optical fiber 30 is a convex curved surface is shown. It can be seen that the light shape formed when the end face of the second end of the optical fiber 30 is set as a convex curved surface is approximately rectangular.
[0060] For example, Figure 8 and Fig. 9 As shown, the end face of the second end of the optical fiber 30 is a convex folded surface, wherein, Figure 8 FIG. 4 shows a partial schematic diagram of an optical fiber 30 whose end face at the second end is a convex folded face, Fig. 9 A schematic diagram of the end face (a convex folded face) of the second end of the optical fiber 30 is shown. Further, Fig.10a FIG. 1 is a schematic diagram showing a simulated light shape formed when the end face of the second end of the optical fiber 30 is a convex folded face. Fig.10b A simplified schematic diagram of the light shape formed when the end face of the second end of the optical fiber 30 is a convex folded surface is shown. It can be seen that the light shape formed when the end face of the second end of the optical fiber 30 is set as a convex folded surface is approximately elliptical.
[0061] Correspondingly, an embodiment of the present application further provides a vehicle lamp lighting module, comprising a light source system provided by any of the above embodiments.
[0062] Optionally, the vehicle lighting module provided in the embodiment of the present application does not need to add an optical system, such as Fig.11 As shown, the light source system directly forms the required light shape through the optical fiber 30, so the vehicle lamp lighting module does not need to be provided with an optical system, and the light collection efficiency of the vehicle lamp lighting module is higher.
[0063] On this basis, optionally, by setting the end face structure of the second end (i.e., the light outlet) of the optical fiber 30, different light patterns can be formed to meet different light shape requirements. For example, when the end face of the second end of the optical fiber 30 is a plane, a circular light shape can be formed; when the end face of the second end of the optical fiber 30 is a convex curved surface, a rectangular light shape can be formed; when the end face of the second end of the optical fiber 30 is a convex folded surface, an elliptical light shape can be formed.
[0064] Alternatively, the number of optical fibers 30 may be multiple, so that the light beams emitted by the multiple optical fibers 30 are combined to form a desired light shape.
[0065] Alternatively, the end face structure of the second end (ie, the light outlet) of the optical fiber 30 can be set to form different light patterns, and the number of optical fibers 30 can be set to multiple, so that the light beams emitted by multiple optical fibers 30 can be combined to form the required light shape.
[0066] Alternatively, the vehicle lighting module provided in the embodiment of the present application includes a light source system and an optical system, wherein the light source system is the light source system provided in any of the aforementioned embodiments, and the light beam emitted by the optical fiber 30 in the light source system is emitted after passing through the optical system to form a desired light shape. Since the light emitting surface area of the optical fiber can be smaller than the light emitting surface area of the existing LED light source, the light collecting efficiency of the optical system is higher, and the size of the optical system can be further reduced, for example, the height of the optical system can be reduced to less than 5 mm.
[0067] On this basis, optional Fig.12 As shown, the optical system includes a reflection bowl 40. The light beam emitted from the optical fiber 30 in the light source system is reflected by the reflection bowl 40 and then emitted. The reflection bowl 40 is used to reflect the light beam.
[0068] Another option, such as Fig.13 As shown, the optical system includes a lens module 50 , which may include one lens or multiple lenses. The light beam emitted from the optical fiber 30 in the light source system is emitted after passing through the lens module 50 .
[0069] Another option is, Fig.14 As shown, the optical system includes a reflection bowl 40 and a lens module 50. The reflection bowl 40 is used to reflect the light beam. The lens module 50 may include one lens or multiple lenses. The light beam emitted from the optical fiber 30 in the light source system is emitted after passing through the reflection bowl 40 and the lens module 50. The present application does not limit the setting order of the reflection bowl 40 and the lens module 50.
[0070] Regardless of whether the light source system provided in the embodiment of the present application is directly used as a vehicle lighting module or as a light source system in a vehicle lighting module, since the light source system provided in the embodiment of the present application emits a light beam through the optical fiber 30, on the first hand, the number of optical fibers 30 and the position of the light emitting surface of the optical fiber 30 can be set according to demand, which is very flexible; on the second hand, compared with the existing LED light source that needs to be configured with circuit boards, heat sinks, fans and other supporting devices, in the light source system provided in the embodiment of the present application, only one laser module 10 and one coupling device 20 can be set, and multiple optical fibers 30 can be used to achieve multiple light emitting openings, and the laser module 10 and the coupling device 20 can be placed in a place with lower heat, so that there is no need to set up heat dissipation devices such as heat sinks and fans, which is more friendly to heat dissipation and helps to reduce the overall weight of the vehicle lighting module.
[0071] On the basis of any of the above embodiments, optionally, the vehicle light lighting module provided in the embodiments of the present application can be a high and low beam module to realize the high and low beam functions; it can also be a signal light module to realize the signal light function.
[0072] The various parts in this manual are described in a combination of parallel and progressive ways. Each part focuses on the differences from other parts, and the same or similar parts between the various parts can be referenced to each other.
[0073] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A light source system, characterized in that: The light source system is applied to a vehicle lighting module, and the light source system comprises a laser module, a coupling device and at least one optical fiber; The laser module is used to generate laser; The coupling device is used to couple the laser generated by the laser module into the optical fiber; The first end of the optical fiber is connected to the coupling device, and the second end of the optical fiber emits a light beam.
2. The light source system according to claim 1, characterized in that: The end face of the second end of the optical fiber is a plane.
3. The light source system according to claim 1, characterized in that: The end surface of the second end of the optical fiber is a convex surface.
4. The light source system according to claim 3, characterized in that: The convex surface is a curved surface or a folded surface.
5. The light source system according to any one of claims 1 to 4, characterized in that: The cross-sectional area of the second end of the optical fiber in a plane perpendicular to the extension direction of the optical fiber is less than or equal to 0.5 mm 2 .
6. The light source system according to any one of claims 1 to 4, characterized in that: The divergence angle of the light beam emitted from the second end of the optical fiber is less than or equal to 120°.
7. A vehicle lighting module, characterized in that: It comprises a light source system, and the light source system is the light source system according to any one of claims 1 to 6.
8. The vehicle lighting module according to claim 7, characterized in that: The vehicle lamp lighting module further comprises an optical system, wherein the optical system comprises a reflective bowl, and the light beam emitted from the optical fiber in the light source system is reflected by the reflective bowl and then emitted.
9. The vehicle lighting module according to claim 7, characterized in that: The vehicle lamp lighting module further comprises an optical system, and the optical system comprises a lens module. The light beam emitted from the optical fiber in the light source system is emitted after passing through the lens module.
10. The vehicle lighting module according to claim 7, characterized in that: The vehicle lamp lighting module further comprises an optical system, which comprises a reflective bowl and a lens module. The light beam emitted from the optical fiber in the light source system is emitted after passing through the reflective bowl and the lens module.