Broadening light supplementing structure

Abstract

The utility model relates to the technical field of fog lamps and discloses a broadening light supplementing structure which comprises a heat dissipation support, a light source circuit board vertically arranged on the front end face of the heat dissipation support, at least one LED patch lamp bead arranged on the light source circuit board and a lens module arranged in front of the LED patch lamp bead. The lens module is provided with annular curved surface lenses which are the same as the LED patch lamp beads in number and correspond to the LED patch lamp beads in a one-to-one mode. After the fog lamp is provided with the broadening light supplementing structure, the horizontal coverage angle of light distribution beams can be effectively enlarged, the light and shade cut-off line and the uniform light spot effect can be enhanced through horizontal broadening of light rays by the annular curved surface lens, and the F3-level light distribution performance requirement of the front fog lamp is met.

Description

Technical Field

[0001] This utility model relates to the field of fog light technology, and in particular to a widening supplementary light structure. Background Technology

[0002] As a functional lighting fixture in automobiles, front fog lights are primarily used to improve road illumination in adverse weather conditions such as fog, snow, rain, or dust, where visibility is low. Front fog lights not only warn pedestrians but also provide illumination, playing a crucial role in enhancing vehicle active safety. Therefore, the design of front fog lights is an important research and development area in automotive lighting design. Traditional front fog lights typically use H1 or H3 bulbs as their light source. Due to their high radiation and low efficiency, these bulbs result in significant energy consumption and environmental pollution, failing to meet the energy-saving and environmentally friendly requirements of automotive lighting systems.

[0003] In recent years, with the improvement of LED luminous efficiency, the increasing reliability requirements of automotive lighting devices, and the maturity of LED packaging technology, the emergence of high-power chips and multi-chip solutions has effectively met the high-power requirements of automotive lighting. Therefore, LEDs will gradually replace traditional halogen bulbs as the next generation of light sources for automotive lighting. The luminous flux and light distribution performance of automotive front fog lights directly affect the safety of vehicles and pedestrians. The luminous flux of a light source characterizes its luminous efficiency and is an important indicator for evaluating light source energy efficiency, which is crucial for product quality control. Automotive front fog lights are installed relatively low and require high brightness according to regulations. The emitted light can effectively compensate for the dark areas in front of the vehicle that cannot be illuminated by low beams and high beams. At the same time, more and more front fog lights are taking on a steering assist function; that is, when turning, the front fog lights turn on to illuminate blind spots. In short, front fog lights not only improve driving safety and prevent traffic accidents in foggy or other adverse weather conditions, but also warn pedestrians and provide illumination.

[0004] The light distribution standard for vehicle lights mainly uses digital quantification to represent the lighting effect of the lights and is analyzed according to regulations and standards. The current standard adopted in China is the "Light Distribution Performance of Front Fog Lamps for Motor Vehicles" (GB4660-2016) issued in 2016. The front fog lamp standard stipulates that the light distribution beam of the front fog lamp should produce a symmetrical and roughly horizontal cutoff line of light and dark within a width of more than 5 on both sides of the VV line on the aiming screen, so as to make visual vertical adjustment. Its light distribution performance, at a distance of 25m in front of the reference center of the front fog lamp, the effective area for illuminance measurement on the light distribution screen should be contained within a square with a side length of 65mm.

[0005] The regulations are divided into Class B standards and the highest level, Class F3 standards. Compared to Class B standards, Class F3 front fog lights have a more detailed measurement range, measuring down to points and lines, with broader and more precise requirements. Testing has revealed that currently available fog lights fail to meet the Class F3 front fog light beam distribution performance requirements. The main reason is the poor beam broadening capability of these front fog lights. They not only struggle to meet the ±22° horizontal position requirements at the left and right ends of line segment 8, but also the ±35° horizontal position requirements at the left and right ends of line segment 9. Therefore, there is an urgent need to develop a beam broadening and supplementary light structure to improve the beam distribution performance of the front fog lights. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a light-broadening and supplementing structure, which aims to solve the technical problem of insufficient light-broadening performance of existing fog lights.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A widening supplementary lighting structure includes a heat dissipation bracket, a light source circuit board vertically disposed on the front end face of the heat dissipation bracket, at least one LED chip lamp bead disposed on the light source circuit board, and a lens module disposed in front of the LED chip lamp bead. The lens module is provided with annular curved lenses that are the same number as the number of LED chip lamp beads and correspond one-to-one.

[0009] As a further improvement to the above technical solution, the convex portion of the annular lens is an elliptical ring protrusion.

[0010] As a further improvement to the above technical solution, the distance between the light-emitting center of the LED chip lamp bead and the focal point of the toroidal lens is within ±1mm.

[0011] As a further improvement to the above technical solution, the widening and supplementary lighting structure also includes a reflector, which has an opening for the toroidal lens to extend out and is adapted to the shape of the toroidal lens.

[0012] As a further improvement to the above technical solution, the outer edge of the opening is chamfered and expanded.

[0013] As a further improvement to the above technical solution, two positioning protrusions are provided on the front end face of the heat dissipation bracket, and positioning holes that are inserted into the positioning protrusions are provided on both the light source circuit board and the lens module.

[0014] As a further improvement to the above technical solution, the light source circuit board and the lens module are provided with corresponding mounting holes, and the heat dissipation bracket is provided with threaded holes corresponding to the mounting holes. The screws pass through the mounting holes in sequence and are connected to the threaded holes.

[0015] As a further improvement to the above technical solution, six toroidal lenses are provided and arranged in a triangular pattern.

[0016] As a further improvement to the above technical solution, the widening supplementary lighting structure is installed in the upper part of the lamp housing.

[0017] The beneficial effects of this utility model are as follows: After the fog light is equipped with the widening and supplementary light structure provided by this utility model, the horizontal widening of the light beam through the toroidal lens can effectively expand the horizontal coverage angle of the light beam, enhance the effect of the cut-off line and uniform light spot, and specifically solve the problem that the existing fog lights cannot meet the horizontal position requirements of line segment 8 (±22°) and line segment 9 (±35°) in the F3 grade light distribution diagram, ensuring that the light distribution performance meets the F3 grade standard and improving product compliance. Attached Figure Description

[0018] Figure 1 A perspective view of the broadening and supplementary lighting structure provided by this utility model.

[0019] Figure 2 A schematic diagram of the extended lighting structure provided by this utility model after installing the reflector and lamp housing.

[0020] Figure 3 This is a schematic diagram of the extended lighting structure with the hidden lens module provided by this utility model.

[0021] Figure 4 A cross-sectional view of the widening supplementary lighting structure provided by this utility model.

[0022] Explanation of main component symbols: 1-Heat dissipation bracket, 11-Positioning protrusion, 12-Positioning hole, 13-Threaded hole, 14-Mounting hole, 15-Screw, 2-Light source circuit board, 21-LED chip lamp bead, 4-Lens module, 41-Circular curved lens, 5-Reflector, 51-Opening, 510-Chamfer, 6-Lamp housing. Detailed Implementation

[0023] This utility model provides a broadening and supplementary lighting structure. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0024] Please see Figures 1 to 4This utility model provides a widening supplementary lighting structure, including a heat dissipation bracket 1, a light source circuit board 2 vertically arranged on the front end surface of the heat dissipation bracket 1, at least one LED chip lamp bead 21 arranged on the light source circuit board 2, and a lens module 4 arranged in front of the LED chip lamp bead 21. The lens module 4 is provided with annular curved surface lenses 41 that are the same number as the LED chip lamp beads 21 and correspond one-to-one.

[0025] The LED SMD LED 21 serves as the light source, radiating light forward after being powered on. When the light shines on the lens module 4, each toroidal lens 41 corresponds to one LED SMD LED 21. Utilizing the unique asymmetric optical surface characteristics of the toroidal lens 41, the light is refracted and diffused. Through a precisely designed curvature distribution, the toroidal lens 41 broadens the initial beam emitted by the LED SMD LED 21 in the horizontal direction, allowing the light to cover a wider range in the horizontal angle. Simultaneously, the vertical light distribution is also optimized through the lens surface, ultimately achieving a light beam that meets regulatory requirements, forming a symmetrical cutoff line of specific angle and range on the illumination screen. The heat dissipation bracket 1 provides a heat dissipation path for the LED SMD LEDs, ensuring stable operation of the light source.

[0026] It should be noted that the toroidal lens 41 has two different radii of curvature and refractive power in two mutually perpendicular directions, which can respectively meet the refractive requirements of the LED light source in different directions, thereby correcting astigmatism. When light passes through the toroidal lens 41, the light rays in different directions will be refracted according to the curvature and refractive power of the lens in that direction. This allows the light rays that could not be focused on the same plane due to astigmatism to be focused in an area of ​​about ±60° horizontally and ±8° vertically after being corrected by the toroidal lens 41, forming a relatively straight cutoff line between light and dark and a uniform light spot.

[0027] After the fog light is equipped with the widening supplementary light structure provided by this utility model, the horizontal widening of the light beam through the annular curved lens 41 can effectively expand the horizontal coverage angle of the light beam. This specifically solves the problem that existing fog lights cannot meet the horizontal position requirements of line segment 8 (±22°) and line segment 9 (±35°) in the F3 grade light distribution diagram, ensuring that the light distribution performance meets the F3 grade standard and improving product compliance.

[0028] In this embodiment, the convex portion of the annular lens 41 is an elliptical ring. This design enhances the difference in curvature radii in the two vertical directions, further strengthening the asymmetric refraction capability of LED light. It allows for precise control of the horizontal beam broadening to the regulatory-required ±35° range, while simultaneously compressing the vertical beam to within ±8°, forming a sharp cutoff line that meets F3 standards and avoiding light pollution and energy loss caused by light scattering.

[0029] Based on the principles of geometric optics, the elliptical ring-shaped convex curved surface structure enables light to produce a more uniform refraction and convergence effect within a horizontal ±60° and vertical ±8° range. By adjusting the position of the light-emitting center of the LED chip lamp 21 relative to the focal point of the toroidal lens 41 (specifically, the distance between the light-emitting center of the LED chip lamp 21 and the focal point of the toroidal lens 41 is within ±1mm), a relatively straight cutoff line between light and dark and the formation of a uniform light spot can be achieved within a range greater than 45°, ensuring that the illuminance distribution on the screen meets the uniformity requirements of a 65mm square area.

[0030] When multiple elliptical ring-shaped toroidal lens units 41 are stacked, the uniformity of curvature distribution enables linear superposition enhancement of light intensity in the horizontally widened area. Without increasing the power of the light source, it effectively improves the long-distance illumination penetration in scenarios such as foggy weather, and avoids the dark areas caused by the splicing of light spots due to differences in lens units, thus meeting the wide-area illumination needs of the front fog lights when assisting with cornering.

[0031] Furthermore, the widening supplementary lighting structure also includes a reflector 5, which has an opening 51 for the toroidal lens 41 to extend from and is adapted to the shape of the toroidal lens 41. The reflector 5 effectively collects stray light emitted from the LED chips to the sides and rear, and reflects the light to the effective working area of ​​the toroidal lens 41 through the high-reflectivity coating on the inner wall. After secondary refraction by the lens, the light is incorporated into the main beam, reducing light loss and significantly improving the overall luminous flux of the front fog light under the same light source power, meeting the stringent regulatory requirements for brightness. In addition, the reflector 5 surrounds the toroidal lens 41, forming a physical protective barrier to resist vibration, dust, and moisture intrusion during vehicle operation, protecting the optical surface of the lens from damage.

[0032] Preferably, the outer edge of the opening 51 is chamfered 510. This chamfered design eliminates the physical obstruction of the light emitted from the toroidal lens 41 by the edge of the reflector 5, allowing the light to diffuse unimpeded in both horizontal and vertical directions. Compared to a traditional right-angle opening 51, this effectively widens the fog light's illumination angle boundary, ensuring the horizontal beam coverage exceeds the ±35° limit, and vertical light diffusion is also unaffected, fully releasing the widening performance of the toroidal lens 41 and meeting the stringent regulatory requirements for wide-area lighting. The chamfered structure 510 prevents stray light or shadows from being generated at the edge of the opening 51, allowing the refracted beam to transition more smoothly to the surrounding area, reducing brightness attenuation at the edge of the light spot, improving the uniformity of illuminance distribution on the aiming screen, and reducing the risk of driver visual fatigue due to uneven brightness. The chamfered 510 expands to form a smooth curved transition, which on the one hand eliminates the sharp edges at the opening 51 of the reflector 5, and on the other hand creates a visual echo with the convex elliptical ring shape of the lens, enhancing the exquisiteness and overall harmony of the lamp's appearance.

[0033] To facilitate installation, two positioning protrusions 11 are provided on the front end face of the heat dissipation bracket 1, and positioning holes 12 that interlock with the positioning protrusions 11 are provided on both the light source circuit board 2 and the lens module 4. This allows for quick alignment of components during assembly, avoiding optical axis misalignment caused by manual alignment deviations and significantly improving production efficiency.

[0034] Furthermore, both the light source circuit board 2 and the lens module 4 are provided with corresponding mounting holes 14, and the heat dissipation bracket 1 is provided with threaded holes 13 corresponding to the mounting holes 14. Screws 15 pass through the mounting holes 14 in sequence and are connected to the threaded holes 13. During installation, the screws 15 pass through the mounting holes 14 of the light source circuit board 2 and the lens module 4 in sequence and are tightened with the threaded holes 13 of the heat dissipation bracket 1, forming a multi-level rigid connection. Compared with a single positioning structure, this can withstand greater axial tensile force and lateral torque, ensuring no relative displacement between components under complex vibration conditions in automobiles, and effectively maintaining the optical coaxiality of the annular curved lens 41 and the LED chip lamp beads.

[0035] In this embodiment, six toroidal lenses 41 are arranged in a triangular pattern. This dense triangular arrangement of the six toroidal lenses 41 expands the light coverage in both the horizontal and vertical directions through optical superposition. Horizontally, they can collaboratively achieve beam broadening exceeding ±35°, while vertically, their staggered distribution fills gaps in the light field, meeting the stringent requirements of the F3 light distribution standard for long-distance, wide-angle illumination. This significantly improves the driver's field of vision, especially in low-visibility scenarios such as fog.

[0036] The symmetrical layout of the triangular array causes the light to form overlapping spots on the aiming screen, eliminating the central bright spot defect of a single point light source and achieving a more uniform illuminance distribution. At the same time, through the synergistic refraction of light between the lenses, the light intensity is superimposed and enhanced in the core illumination area (a 65mm square), improving the penetration ability and warning effect in foggy weather.

[0037] In fact, since the aforementioned widening and supplementary lighting structure is installed in the lamp housing 6, the number of annular lenses 41 is also related to the size of the lamp housing 6. The annular lenses 41 can also be configured in the following ways: 1. Four annular lenses 41 are arranged in a rectangular pattern; 2. Three annular lenses 41 are arranged in an equilateral triangle pattern; 3. Five annular lenses 41 are arranged in a staggered, quincunx pattern, i.e., one lens in the center and four lenses in the periphery arranged in a rhombus pattern, forming a staggered superimposed light path.

[0038] In practical applications, the aforementioned widening supplementary lighting structure is installed in the upper half of the lamp housing 6, while the lower half of the lamp housing 6 houses the fog lights and main lights. Placing the widening supplementary lighting structure in the upper half of the lamp housing 6 forms a vertical functional zone with the fog lights and main lights in the lower half, making full use of the longitudinal space of the lamp. The widening supplementary lighting structure in the upper half focuses on horizontal wide-area lighting (such as cornering assist and fog boundary visibility), while the main lights in the lower half focus on close-range strong light projection. The light from the two forms a complementary superposition in space, which not only meets the regulatory requirement of ±35° horizontal widening of the front fog lights, but also enhances the illuminance of the central area, eliminates blind spots, and improves overall visibility under complex road conditions.

[0039] In the simulated light intensity pattern diagram of the actual experiment, the front fog light equipped with the widening supplementary light structure provided by this utility model can be widened to a horizontal range of ±60°, which fully meets the horizontal position requirements of line segment 8 (±22°) and line segment 9 (±35°) in the F3 level light distribution diagram.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have it.

Claims

1. A light-expanding and supplementing structure, characterized in that, The device includes a heat sink bracket, a light source circuit board vertically mounted on the front end face of the heat sink bracket, at least one LED chip lamp bead mounted on the light source circuit board, and a lens module mounted in front of the LED chip lamp bead. The lens module is provided with annular curved lenses that are the same number as the number of LED chip lamp beads and correspond one-to-one.

2. The light-expanding and supplementary lighting structure according to claim 1, characterized in that, The convex portion of the toroidal lens is an elliptical ring protrusion.

3. The light-expanding and supplementary lighting structure according to claim 1, characterized in that, The distance between the light-emitting center of the LED chip lamp and the focal point of the toroidal lens is within ±1mm.

4. The light-expanding and supplementary lighting structure according to claim 1, characterized in that, The widening and supplementary lighting structure also includes a reflector, which has an opening for the toroidal lens to extend out and is adapted to the shape of the toroidal lens.

5. The light-expanding and supplementary lighting structure according to claim 4, characterized in that, The outer edge of the opening is chamfered and expanded.

6. The light-expanding and supplementary lighting structure according to claim 1, characterized in that, Two positioning protrusions are provided on the front end face of the heat dissipation bracket, and positioning holes that are inserted into the positioning protrusions are provided on both the light source circuit board and the lens module.

7. The light-expanding and supplementary lighting structure according to claim 6, characterized in that, The light source circuit board and lens module are provided with corresponding mounting holes, and the heat dissipation bracket is provided with threaded holes corresponding to the mounting holes. The screws pass through the mounting holes in sequence and are connected to the threaded holes.

8. The broadening and supplementary lighting structure according to any one of claims 1-7, characterized in that, The toroidal lenses are arranged in a triangular pattern, comprising six lenses.

9. The light-expanding and supplementary lighting structure according to any one of claims 1-7, characterized in that, The aforementioned widening supplementary lighting structure is installed in the upper part of the lamp housing.

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