Multi-light-source LED driving lamp with good heat dissipation effect

Abstract

The utility model relates to the technical field of vehicle lamps, in particular to a multi-light-source light-emitting diode (LED) driving lamp with a good heat dissipation effect, which comprises a heat dissipation lamp body shell and a rotatable support hinged on the heat dissipation lamp body shell, and a substrate heat dissipation device is fixedly arranged in an inner cavity of the heat dissipation lamp body shell. A multi-light type LED module with a light source facing backwards and a heat pipe with the evaporation end attached to the multi-light type LED module are embedded in the rear end of the substrate radiator, a radiating plate tightly attached to the inner wall of the radiating lamp body shell is connected to the condensation end of the heat pipe, and all light type lamp beads on the multi-light type LED module are provided with reflection cups optically matched with the light type lamp beads. The light emitting direction of the reflection cup faces a diffusion panel at the front end of the heat dissipation lamp body shell. By introducing an active heat conduction structure of the heat pipe, the heat dissipation plate and the shell, even if the size of the shell is limited, heat can be guided to an area with a better heat dissipation condition on the shell through the heat pipe, the heat dissipation efficiency and the power density are improved, and higher-power and denser LED modules are allowed to be used and kept stable.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a multi-source LED driving light with good heat dissipation. Background Technology

[0002] Currently, most common LED driving lights adopt the passive heat dissipation design of traditional car lights, which mainly relies on the heat conduction of the lamp housing and limited heat dissipation fins for natural convection heat dissipation, such as the integrated LED headlight disclosed in patent number CN201821634794.7.

[0003] However, in practice, it has been found that in order to pursue stronger lighting performance and a more compact size, modern driving lights often need to integrate multiple high-power light sources (such as focusing and flat light modules), which drastically increases the heat load per unit volume. Under the constraint of limited internal space, traditional passive heat dissipation methods are no longer effective in dissipating such concentrated heat. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing LED driving lights, such as the inability to effectively handle the concentrated heat generated by multiple high-power light sources due to the use of traditional passive heat dissipation methods. Therefore, this invention proposes a multi-source LED driving light with good heat dissipation performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a multi-source LED driving light with good heat dissipation effect, including a heat dissipation lamp housing 1 and a rotatable bracket 11 hinged to the heat dissipation lamp housing 1. A substrate heat sink 2 is fixed in the inner cavity of the heat dissipation lamp housing 1. A multi-beam LED module 3 with the light source facing rearward is embedded in the rear end of the substrate heat sink 2 and a heat pipe 21 with the evaporation end attached to the multi-beam LED module 3. A heat dissipation plate 12 that is tightly attached to the inner wall of the heat dissipation lamp housing 1 is connected to the condensation end of the heat pipe 21. Each light type LED bead in the multi-beam LED module 3 is equipped with a reflector 31 that is optically matched to it. The light emission direction of the reflector 31 is towards the diffuser panel 13 at the front end of the heat dissipation lamp housing 1.

[0007] Furthermore, the rear end of the substrate heat sink 2 is recessed with a groove 22 for assembling the multi-beam LED module 3 therein. The evaporation end of the heat pipe 21 is disposed in the groove 22 and attached to the multi-beam LED module 3. The inner wall of the heat sink housing 1 and the heat sink plate 12 are provided with coaxially arranged openings 14 for assembling the condensation end of the heat pipe 21 therein.

[0008] Furthermore, the substrate heat sink 2 includes a heat sink back cover 23 installed on the inner wall of the heat sink housing 1. The heat sink back cover 23 is provided with a plurality of heat sink brackets 24 arranged symmetrically in the circumferential direction. The multi-beam LED module 3 is correspondingly embedded in the rear end of each of the heat sink brackets 24.

[0009] Furthermore, each light type LED bead on the multi-beam LED module 3 is independently installed on the corresponding heat sink bracket 24 and arranged regularly around the center of the heat sink back cover 23.

[0010] Furthermore, a position light source substrate 4 with the light source facing forward is fixed on the inner wall of the heat dissipation lamp housing 1. A coaxial and parallel position light source diffuser plate 41 and position light source light guide strip 42 are also arranged in sequence along the light path direction in front of the position light source substrate 4. The position light source light guide strip 42 is disposed between the position light source diffuser plate 41 and the diffuser panel 13.

[0011] Furthermore, the position light source substrate 4 is ring-shaped, and the position light source beads 43 on the position light source substrate 4 are symmetrically distributed circumferentially.

[0012] Furthermore, the inner wall of the heat dissipation lamp housing 1 has a raised step 15 for mounting the position lamp light source diffuser plate 41 therein, and the rear end of the reflector cup 31 is also recessed with a limiting groove 311 for inserting the step 15 therein for limiting and fixing.

[0013] Furthermore, a light strip light source plate 5 is embedded on the outer side of the heat dissipation lamp housing 1, and the light strip light source plate 5 is provided with a light strip diffuser plate 51 and a lamp cover 52 in sequence along the light path direction.

[0014] Furthermore, the substrate heat sink 2 is also fitted with a decorative light source substrate 25 with the light source facing forward and a decorative cover plate 26 covering the light emission direction of the decorative light source substrate 25.

[0015] Furthermore, the heat dissipation lamp housing 1 includes a decorative face frame 16 and a lamp body rear cover 17 arranged at the front and back. A waterproof ring 18 is provided between the decorative face frame 16 and the lamp body rear cover 17. The waterproof ring 18 is recessed with an assembly groove 181 for the diffusion panel 13 to be assembled therein.

[0016] The present invention proposes a multi-source LED driving light with good heat dissipation, the advantages of which are:

[0017] In this invention, an active heat conduction architecture of "heat pipe + heat sink + housing" is introduced. The heat pipe can efficiently decouple the heat source from the final heat sink, which allows heat to be directed to areas with better heat dissipation conditions on the housing even if the housing volume is limited. This significantly improves heat dissipation efficiency and power density, and allows the use of higher power and denser LED modules while maintaining stability.

[0018] Secondly, in this invention, each (or group of) LED beads in the multi-beam LED module is matched with an independent reflector. This is a modular and customized optical design. It can maximize the luminous efficacy of each LED, precisely control the light distribution pattern of different beam patterns (such as a clear low beam cutoff line), and achieve a pure combination of multiple beam patterns, truly realizing one lamp for multiple uses and excellent optical performance in each mode. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a multi-source LED driving light with good heat dissipation proposed in this utility model.

[0020] Figure 2 for Figure 1 The diagram shown is an exploded view of the forward-looking structure of a multi-source LED driving light with good heat dissipation.

[0021] Figure 3 for Figure 1 The diagram shows an exploded view of a multi-source LED driving light with good heat dissipation.

[0022] In the diagram: 1. Heat sink housing; 11. Rotatable bracket; 12. Heat sink plate; 13. Diffuser panel; 14. Opening; 15. Step; 16. Decorative frame; 17. Back cover of the lamp body; 18. Waterproof ring; 181. Assembly slot; 2. Substrate heat sink; 21. Heat pipe; 22. Groove; 23. Back cover of the heat sink; 24. Heat sink bracket; 25. Decorative light source substrate; 26. Decorative cover plate; 3. Multi-beam LED module; 31. Reflector cup; 311. Limiting groove; 4. Position light source substrate; 41. Position light source diffuser plate; 42. Position light source light guide strip; 43. Position light source LED bead; 5. Light strip light source board; 51. Light strip diffuser plate; 52. Lampshade. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-3A multi-source LED driving light with good heat dissipation includes a heat dissipation lamp housing 1 and a rotatable bracket 11 hinged to the heat dissipation lamp housing 1. The heat dissipation lamp housing 1 achieves heat dissipation by using a heat-dissipating metal material and its heat dissipation fin structure design to dissipate internal heat into the environment. The rotatable bracket 11 allows the user to adjust the illumination pitch angle of the LED driving light according to the vehicle installation position and lighting requirements. A substrate heat sink 2 is fixedly installed in the inner cavity of the heat dissipation lamp housing 1, and a multi-source LED light source facing rearward is embedded at the rear end of the substrate heat sink 2. The multi-beam LED module 3 and the heat pipe 21 with its evaporation end attached to it are arranged in a multi-beam LED module 3. The substrate heat sink 2 can be made of a high thermal conductivity metal, which can quickly and evenly conduct the heat generated by the multi-beam LED module 3 to the heat pipe 21 connected to it, thereby preventing heat from accumulating at the LED chip. The multi-beam LED module 3 can integrate LED chips of different beam types (such as high beam, low beam, floodlight, etc.), so that a single lamp can switch or combine lighting modes according to different driving scenarios (such as highway, off-road, etc.), improving the functional integration and ease of use. The condensation end of the heat pipe 21 is connected to a heat sink 12 that is closely attached to the inner wall of the heat sink lamp housing 1. It can diffuse the received concentrated heat into a large area of ​​heat, and then transfer the heat to the housing through close contact with the inner wall of the heat sink lamp housing 1, and finally dissipate it to the outside. Each beam type LED on the multi-beam LED module 3 is equipped with a reflector 31 that is optically matched to it, so as to provide independent and precise optical control for each beam type LED. The light output direction of the reflector 31 is towards the diffuser panel 13 at the front end of the heat sink housing 1, so that the independent light spots output by multiple reflectors can be further merged to form a more uniform and visually more comfortable final lighting effect.

[0025] Specifically, after power is applied, the LED chips on the multi-beam LED module 3 convert electrical energy into light energy and waste heat. The waste heat generated is first collected by the highly thermally conductive substrate heat sink 2 and conducted to the evaporation end of the heat pipe 21 attached thereto. Subsequently, the heat pipe 21 can initiate a phase change cycle, quickly and with low loss, transferring heat to the condensation end located elsewhere in the lamp. Then, the heat sink 12 set on the condensation end of the heat pipe 21 can receive and diffuse the heat conducted on the heat pipe 21, and transfer the heat to the inner wall of the entire heat sink lamp housing 1 through close contact. Finally, the heat sink lamp housing 1 can use its large outer surface area (especially the fin structure) to dissipate the heat into the surrounding air through convection and radiation, maintaining the LED chips at a safe low temperature. At this time, the light emitted by the multi-beam LED module 3 can be precisely collected and shaped by its respective matching reflector cup 31 to form a light pattern that conforms to the design, and then pass through the front diffuser panel 13 to project a uniform and compliant beam onto the road surface in front of the vehicle.

[0026] More specifically, most common products on the market use a simple heat conduction path of "LED → aluminum substrate → aluminum alloy shell". Its heat dissipation efficiency is limited by the thermal conductivity of the metal and the volume of the shell. Under high power, heat is easily accumulated, leading to accelerated light decay and shortened lifespan. This application introduces an active heat conduction architecture of "heat pipe + heat sink + shell". The heat pipe 21 can efficiently decouple the heat source from the final heat sink. This allows heat to be directed to areas with better heat dissipation conditions on the shell even if the shell volume is limited. This significantly improves heat dissipation efficiency and power density, allowing the use of higher power and denser LED modules while maintaining stability.

[0027] More specifically, most common products on the market often use a single large reflector or lens to cover all LEDs, resulting in fixed light patterns that may interfere with each other, or simple mode switching achieved by switching different LED areas, leading to low optical efficiency and inaccurate light patterns. This application, however, matches each (or group of) LED in the multi-beam LED module 3 with an independent reflector 31. This is a modular, customized optical design. It maximizes the luminous efficacy of each LED, precisely controls the light distribution patterns of different light patterns (such as a clear low beam cutoff line), and enables pure combinations of multiple light patterns, truly achieving multi-purpose lighting with excellent optical performance in each mode. For example, each LED in the multi-beam LED module 3 can be independently driven and controlled by a circuit. Users can activate a single light pattern mode or multiple light pattern modes simultaneously as needed, achieving high flexibility and meeting lighting needs in various scenarios, from high-speed driving and outdoor exploration to slow driving in urban areas.

[0028] Furthermore, in this embodiment, as Figure 3 As shown, the rear end of the substrate heat sink 2 is recessed inward to accommodate the multi-beam LED module 3. The recess 22 provides a size-matched installation space for the multi-beam LED module 3, ensuring its precise positioning and providing some protection on the side. The evaporation end of the heat pipe 21 is located within the recess 22 and is attached to the multi-beam LED module 3, resulting in faster and more efficient heat absorption. The inner wall of the heat sink housing 1 and the heat sink plate 12 are provided with coaxially arranged openings 14 for assembling the condenser end of the heat pipe 21, allowing the condenser end of the heat pipe 21 to pass through and be fixed thereon. At the same time, the heat sink plate 12 can directly and efficiently absorb the heat transferred by the heat pipe 21 and diffuse it laterally into a large area of ​​heat plane. Then, through the tight fit between the entire plate surface and the inner wall of the housing, the heat is evenly transferred to the housing.

[0029] Furthermore, in this embodiment, as Figure 2 and Figure 3As shown, the substrate heat sink 2 includes a heat sink back cover 23 installed on the inner wall of the heat sink housing 1. It is made of a high thermal conductivity metal and can diffuse the heat transferred from the heat pipe 21 laterally to its entire plane and then conduct it to the heat sink housing 1 that is in close contact with it, reducing the local accumulation of heat in the transfer path. The heat sink back cover 23 is provided with a plurality of heat sink brackets 24 arranged symmetrically in the circumferential direction. The multi-beam LED module 3 is correspondingly embedded in the rear end of each heat sink bracket 24. The design of the heat sink bracket 24 can decompose the concentrated large heat source into multiple small heat sources to reduce the local heat density, while suspending and fixing the multi-beam LED module 3 in a preset position.

[0030] Furthermore, each type of LED bead on the multi-beam LED module 3 is independently mounted on its corresponding heat sink bracket 24 and arranged regularly around the center of the heat sink back cover 23. This application physically separates the LED beads of each type (such as high beam, low beam, and floodlight) and independently mounts them on the corresponding heat sink bracket 24, so that the heat source and light source can be decomposed into multiple regularly arranged independent units and arranged symmetrically around the center. This can provide the optimal installation position and angle for each type of LED bead, and at the same time avoid the problem of mutual thermal interference caused by multiple LED beads working at the same time on a substrate.

[0031] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, a position light source substrate 4 with the light source facing forward is fixed on the inner wall of the heat dissipation lamp housing 1. It is mostly installed on the side wall of the lamp housing and can be used as an independent signal light source. A coaxial and parallel position light source diffuser plate 41 and position light source light guide strip 42 are also arranged in front of the position light source substrate 4 along the light path direction. The position light source light guide strip 42 is disposed between the position light source diffuser plate 41 and the diffuser panel 13. The position light source diffuser plate 41 can scatter and mix the light emitted by the position light source substrate 4 for the first time, eliminating obvious graininess and creating a preliminary uniform surface light source for subsequent light guiding. At the same time, the position light source light guide strip 42 can guide the light from the position light source diffuser plate 41 to the entire strip area and make it shine out evenly from the front or a specific surface, forming a continuous, dark area-free, and uniformly bright light strip to achieve an aesthetic visual effect.

[0032] Specifically, after the position light source lamp bead 43 on the position light source substrate 4 is lit, the light is first homogenized by the position light source diffuser plate 41 in front, and then enters the position light source light guide strip 42. The light is guided by total internal reflection and microstructure inside, and is emitted evenly from the entire strip front. The uniform surface light finally passes through the corresponding area of ​​the diffuser panel 13 and is emitted.

[0033] In this embodiment, the position light source system and the multi-light source system can be controlled independently. For example, during the day, only the position light source system can be activated as a daytime running light, while at night, the multi-light source system can be activated simultaneously or switched. They can share the same structural shell and the same final light-emitting panel, but they are separate in terms of optical path design and do not interfere with each other.

[0034] Furthermore, the LED chips used in the position light source substrate 4 are mostly low-power, and their heat can be directly conducted to the inner wall of the heat dissipation lamp housing 1 to dissipate, without the need for a complex heat pipe system.

[0035] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the position light source substrate 4 is ring-shaped, which can adapt to the internal contour of the circular or square-shaped lamp housing to maximize the use of edge space. The position light source LED beads 43 on the position light source substrate 4 are symmetrically distributed in the circumference, which can achieve 360° uninterrupted uniform basic lighting, avoid the problem of uneven brightness caused by single point or a few point light sources, and at the same time facilitate the uniform dissipation of heat to the lamp housing through the entire substrate, thereby improving the life of LED light source.

[0036] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the inner wall of the heat dissipation lamp housing 1 has a raised step 15 for mounting the position lamp light source diffuser plate 41. It provides a precise axial and radial positioning surface and a support surface for the annular position lamp light source diffuser plate 41, ensuring that the position lamp light source diffuser plate 41 is fixed in an ideal position that is precisely parallel to the position lamp light source beads 43. The rear end of the reflector cup 31 is also recessed with a limiting groove 311 for the step 15 to be inserted for limiting and fixing. This groove can limit the radial and circumferential direction of the reflector cup 31 to prevent it from rotating or shifting during vibration, ensuring that the light pattern is absolutely stable.

[0037] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, a light strip light source plate 5 is embedded on the outer side of the heat dissipation lamp housing 1. It can be used as a third light source independent of the multi-light system. It is usually installed on the side or rear side of the heat dissipation lamp housing 1 to provide functions such as side auxiliary lighting, turn signals, work warning lights or rear position lights. The light strip light source plate 5 is provided with a light strip diffuser plate 51 and a lamp cover 52 in sequence along the light path direction. The light strip diffuser plate 51 can convert the point LED light emitted by the light strip light source plate 5 into uniform surface light or strip light, eliminate the graininess and improve the visual effect, while the lamp cover 52 can provide professional optical control and robust protection for the outer light strip light source plate 5.

[0038] Furthermore, in this embodiment, as Figure 2 and Figure 3As shown, the substrate heat sink 2 is also fitted with a decorative light source substrate 25 with the light source facing forward and a decorative cover plate 26 covering the light-emitting direction of the decorative light source substrate 25. The decorative light source substrate 25 is located on the heat sink, which means that it is in the visual focal area, and its light source (usually a low-power, multi-color RGB LED) is not intended to illuminate the road, but to illuminate the structure of the lamp itself, or to project specific brand light patterns for brand display, mode indication (such as different light colors corresponding to different driving modes) or pure atmosphere creation when the vehicle is static or dynamic. The decorative cover plate 26 can be semi-transparent, with a specific texture or hollowed-out logo design, to transform the point light source into a soft halo, a clear brand logo projection or delicate light guide lines, and to protect the internal light source.

[0039] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the heat dissipation lamp housing 1 includes a decorative frame 16 arranged at the front and back and a lamp body rear cover 17. The lamp body rear cover 17 is provided with heat dissipation fins, which are the final heat sinks for all internal thermal management modules such as the substrate heat sink and heat pipes, and are equipped with electrical interfaces. A waterproof ring 18 is provided between the decorative frame 16 and the lamp body rear cover 17 to form a seal and prevent moisture and dust from entering from the side. The waterproof ring 18 is recessed with an assembly groove 181 for the diffusion panel 13 to be assembled therein, so that the diffusion panel 13 is tightly wrapped by the waterproof ring 18 from the side to achieve a seal. At the same time, it can also eliminate the cumbersome process of gluing the panel or using additional pressure strips, realizing the screwless and glueless installation of the panel.

[0040] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-source LED driving light with good heat dissipation, characterized in that, The device includes a heat sink housing (1) and a rotatable bracket (11) hinged to the heat sink housing (1). The inner cavity of the heat sink housing (1) is fixed with a substrate heat sink (2). The rear end of the substrate heat sink (2) is fitted with a multi-beam LED module (3) with the light source facing the rear and a heat pipe (21) with the evaporation end attached to the multi-beam LED module (3). The condensation end of the heat pipe (21) is connected to a heat sink plate (12) that is tightly fitted to the inner wall of the heat sink housing (1). Each light type LED bead on the multi-beam LED module (3) is equipped with a reflector (31) that is optically matched with it. The light emission direction of the reflector (31) is towards the diffuser panel (13) at the front end of the heat sink housing (1).

2. The multi-source LED driving light with good heat dissipation effect according to claim 1, characterized in that: The rear end of the substrate heat sink (2) is recessed with a groove (22) for mounting the multi-beam LED module (3). The evaporation end of the heat pipe (21) is located in the groove (22) and attached to the multi-beam LED module (3). The inner wall of the heat sink housing (1) and the heat sink plate (12) are provided with coaxial openings (14) for mounting the condensation end of the heat pipe (21).

3. The multi-source LED driving light with good heat dissipation effect according to claim 1, characterized in that: The substrate heat sink (2) includes a heat sink back cover (23) installed on the inner wall of the heat sink housing (1). The heat sink back cover (23) is provided with a plurality of heat sink brackets (24) arranged symmetrically in the circumferential direction. The multi-beam LED module (3) is correspondingly embedded in the rear end of each heat sink bracket (24).

4. The multi-source LED driving light with good heat dissipation effect according to claim 3, characterized in that: Each type of LED bead on the multi-beam LED module (3) is independently installed on the corresponding heat sink bracket (24) and arranged regularly around the center of the heat sink back cover (23).

5. A multi-source LED driving light with good heat dissipation according to any one of claims 1 to 4, characterized in that: A position light source substrate (4) with the light source facing forward is fixed on the inner wall of the heat dissipation lamp housing (1). A coaxial and parallel position light source diffuser plate (41) and position light source light guide strip (42) are also arranged in sequence along the light path direction in front of the position light source substrate (4). The position light source light guide strip (42) is disposed between the position light source diffuser plate (41) and the diffuser panel (13).

6. A multi-source LED driving light with good heat dissipation effect according to claim 5, characterized in that: The position light source substrate (4) is ring-shaped, and the position light source beads (43) on the position light source substrate (4) are symmetrically distributed in the circumferential direction.

7. A multi-source LED driving light with good heat dissipation effect according to claim 5, characterized in that: The inner wall of the heat dissipation lamp housing (1) has a raised step (15) for mounting the position lamp light source diffuser plate (41). The rear end of the reflector cup (31) is also recessed with a limiting groove (311) for inserting the step (15) into it for limiting and fixing.

8. A multi-source LED driving light with good heat dissipation effect according to claim 1, characterized in that: The outer side of the heat dissipation lamp housing (1) is fitted with a light strip light source plate (5), and the light strip light source plate (5) is provided with a light strip diffuser plate (51) and a lamp cover (52) in sequence along the light path direction.

9. A multi-source LED driving light with good heat dissipation effect according to claim 1, characterized in that: The substrate heat sink (2) is also fitted with a decorative light source substrate (25) with the light source facing forward and a decorative cover plate (26) covering the light output direction of the decorative light source substrate (25).

10. A multi-source LED driving light with good heat dissipation effect according to claim 1, characterized in that: The heat dissipation lamp housing (1) includes a decorative face frame (16) arranged at the front and back and a lamp body back cover (17). A waterproof ring (18) is provided between the decorative face frame (16) and the lamp body back cover (17). The waterproof ring (18) is recessed with an assembly groove (181) for the diffuser panel (13) to be assembled therein.

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