Signal lamp module and vehicle lamp

Abstract

The utility model provides a signal lamp module and a vehicle lamp. The signal lamp module comprises a light source used for emitting light; the lens comprises a light inlet face and a light outlet face, the light inlet face of the lens is opposite to the light source, and the light outlet face is located on the side, away from the light inlet face, of the light source; wherein the light-in surface is a regular curved surface, the light-out surface is a free-form curved surface, light emitted by the light source enters the lens through the regular curved surface, a preset light type is projected by the free-form curved surface in a far field, and the preset light type comprises a back-up lamp light type or a fog lamp light type. Therefore, the design requirements of small opening size and high luminous efficiency of the signal lamp module are met.

Description

Technical Field

[0001] This application relates to the field of vehicle lighting technology, and in particular to a signal light module and vehicle lighting. Background Technology

[0002] With the continuous development of vehicle lighting technology, higher requirements have been placed on the design, performance, and cost of signal lights.

[0003] Currently, the main optical solutions for traffic lights include reflector solutions and thick-walled solutions. The light relies on the specular reflection of the reflective surface or the total internal reflection / refraction of the thick-walled structure to form the traffic light pattern.

[0004] However, the aforementioned reflector solutions suffer from absorption and scattering losses due to the reflective coating, while the thick-walled solutions experience material absorption and interface reflection losses, resulting in significant light efficiency losses. Furthermore, to collect as much light as possible, the reflective surface or thick-walled component is typically large, leading to a larger light-emitting aperture. In other words, current signal light optical solutions struggle to achieve the high light efficiency design requirements within a small footprint. Utility Model Content

[0005] This application provides a signal light module and vehicle light, aiming to improve the problems of large opening size and low luminous efficiency of signal light modules in related technologies.

[0006] In a first aspect, embodiments of this application propose a signal light module, comprising: a light source for emitting light; and a lens, the lens including an incident surface and an exit surface, the incident surface of the lens being opposite to the light source, and the exit surface being located on the side of the light source away from the incident surface; wherein the incident surface is a regular curved surface, the exit surface is a free-form curved surface, and the light emitted by the light source is incident into the lens via the regular curved surface, and a preset light pattern is projected in the far field by the free-form curved surface, the preset light pattern including a reversing light pattern or a fog light pattern.

[0007] The traffic light module of this application, through a combination design of a light source and a lens, directly projects the light from the light source through the lens to form a preset light pattern in the far field. Compared with related technologies that use reflector solutions or thick-walled solutions, in the traffic light module of this application, the light-incident surface of the lens is directly close to the light source, and the light emitted from the light source enters the lens through a refraction path, which can reduce energy loss caused by reflection and total internal reflection. At the same time, the light-emitting surface adopts a free-form surface design, which can reduce the scattering and waste of light, thereby improving the luminous flux utilization rate and thus improving the light output efficiency of the traffic light module. Furthermore, the regular curved surface of the light-incident surface can efficiently guide the divergent light emitted by the light source into the interior of the lens to form a beam with a controllable angle. Then, the beam is emitted through the free-form surface, and each tiny area on the free-form surface can achieve precise light distribution, completing the light pattern conversion within a short distance. The optical path is short and the energy is concentrated, which eliminates the need for a large-area light-emitting surface, a long optical path, or large-size optical components. This also helps to reduce the height and width of the lens, and further facilitates the design of a small opening size for the traffic light module. This facilitates the achievement of the design requirements for small opening size and high luminous efficiency in traffic light modules.

[0008] In some embodiments, there are multiple lenses and multiple light sources, and each lens and light source corresponds to another lens. Adjacent lenses are spliced ​​together along a first direction or a second direction, where the first direction is the width direction of the lens and the second direction is the height direction of the lens.

[0009] Since each lens is a pre-designed standard component, it can be spliced ​​together to form a light-emitting surface with any opening shape. Then, by matching the luminous flux of the corresponding light source, it can adapt to different shape requirements and reduce the design time and cost of the signal light.

[0010] In some embodiments, the height of the lens is less than or equal to 10 mm, and the width of the lens is less than or equal to 14 mm.

[0011] This approach has two advantages. First, it improves the structural compactness of the signal light module. Second, current vehicle designs are trending towards smaller openings in the headlights; smaller openings allow the signal light module to better integrate with the high and low beam headlight modules, significantly enriching the overall vehicle aesthetics. This also enhances the adaptability and application scenarios of the signal light module across vehicles.

[0012] In some embodiments, the preset light pattern is a reversing light pattern;

[0013] The regular curved surface is a concave cylindrical surface. The optical axis of the lens coincides with the light-emitting center of the light source. Along the second direction, the line connecting the midpoint of the light-emitting surface and the midpoint of the light-incident surface does not coincide with the optical axis.

[0014] Wherein, along the first direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -50° and less than or equal to 50°;

[0015] Along the second direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -13° and less than or equal to 13°.

[0016] In this embodiment, the special design of the light-incident surface of the concave cylindrical surface and the light-exit surface of the offset free-form surface enables the reversing light pattern to achieve the required horizontal wide coverage and vertical low elevation angle. On the one hand, this improves the structural compactness of the reversing light and enables a miniaturized opening design; on the other hand, it improves the luminous efficacy of the reversing light, exceeding 85%. Furthermore, it also helps to reduce the design cycle and production cost of the reversing light.

[0017] In some embodiments, the signal light module has a first reference surface and a second reference surface, the first reference surface passing through the optical axis and parallel to the second direction, and the second reference surface passing through the optical axis and parallel to the first direction;

[0018] A coordinate system is established with the light-emitting center as the origin, the optical axis as the X-axis, the first direction as the Y-axis, and the second direction as the Z-axis, wherein:

[0019] The first reference surface intersects with the light-emitting surface of the lens to form a first curve, which satisfies the following formula:

[0020] z=10.122-12.346x+4.566x2-0.779x 3 +0.135x 4 +0.075x 5 ;

[0021] The second reference plane intersects with the light-emitting surface of the lens to form a second curve, which satisfies the following formula:

[0022] y = 10.25 - 21.5x + 15.3x 2 -3.8x 3 +0.25x 4 -0.022x 5 .

[0023] This allows the light-emitting surface to adjust the light emission angle to within ±50° in the first direction and within ±13° in the second direction, meeting the requirements of reversing lights. Furthermore, by independently designing the two curves, the three-dimensional freeform surface is decomposed into the coordinated control of two two-dimensional curves. Combined with deep coupling with the incident light surface, end-to-end light control is achieved within a millimeter-scale lens size. This also helps reduce the complexity of optical design and mold manufacturing, improves the convenience of lens production, and lowers manufacturing costs.

[0024] In some embodiments, along the first direction, the light-emitting surface includes a first region, a second region, a third region, a fourth region, and a fifth region arranged in sequence, and the optical axis passes through the third region; along the second direction, the light-emitting surface includes a sixth region, a seventh region, and an eighth region arranged in sequence, and the optical axis passes through the seventh region.

[0025] Along the first direction, the angle between the light rays emitted from the first region and the optical axis is greater than or equal to 35° and less than or equal to 50°; the angle between the light rays emitted from the second region and the optical axis is greater than or equal to 15° and less than or equal to 35°; the angle between the light rays emitted from the third region and the optical axis is greater than or equal to -15° and less than or equal to 15°; the angle between the light rays emitted from the fourth region and the optical axis is greater than or equal to -35° and less than or equal to -15°; and the angle between the light rays emitted from the fifth region and the optical axis is greater than or equal to -50° and less than or equal to -35°.

[0026] Along the second direction, the angle between the light emitted from the sixth region and the optical axis is greater than or equal to 8° and less than or equal to 13°, the angle between the light emitted from the seventh region and the optical axis is greater than or equal to -8° and less than or equal to 8°, and the angle between the light emitted from the eighth region and the optical axis is greater than or equal to -13° and less than or equal to -8°.

[0027] Thus, firstly, since the overall freeform surface mold requires ultra-precision polishing, resulting in high cost and low yield, this design decomposes the freeform surface of the light-emitting surface into multiple sub-regions, each of which can be processed independently, thereby helping to reduce costs and improve yield. Secondly, optimizing the light angle independently for each zone of the light-emitting surface can improve the spot or hotspot problems in related technologies, ensuring a smooth light transition and forming a uniform light pattern without dark areas. Thirdly, controlling the zone angle can reduce light scattering, ensuring that almost all the light emitted by the light source is utilized, thereby further improving luminous efficiency.

[0028] In some embodiments, the preset light pattern is a fog light pattern;

[0029] The regular curved surface is an outwardly convex arc surface, the optical axis of the lens coincides with the light emission center of the light source, and along the second direction, the line connecting the midpoint of the light-emitting surface and the midpoint of the light-incident surface coincides with the optical axis;

[0030] Wherein, along the first direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -13° and less than or equal to 13°;

[0031] Along the second direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -8° and less than or equal to 8°.

[0032] In this embodiment, the fog light pattern can be designed through the special design of the light-incident surface of the convex arc surface and the light-exit surface of the free-form surface. The combination of narrow angles of ±13° horizontally and ±8° vertically forms an approximately rectangular concentrated beam, which helps to improve the transmittance of the fog light and reduce scattering. On the one hand, it helps to improve the structural compactness of the fog light and realize a miniaturized opening design; on the other hand, it helps to improve the luminous efficacy of the fog light, exceeding 70%. Furthermore, it also helps to reduce the design cycle and production cost of the fog light.

[0033] In some embodiments, the signal light module has a first reference surface and a second reference surface, the first reference surface passing through the optical axis and parallel to the second direction, and the second reference surface passing through the optical axis and parallel to the first direction;

[0034] A coordinate system is established with the light-emitting center as the origin, the optical axis as the X-axis, the width direction of the lens as the Y-axis, and the height direction of the lens as the Z-axis, wherein:

[0035] The first reference surface intersects with the light-emitting surface of the lens to form a ninth curve, which satisfies the following formula:

[0036] z=19563.54-19206.62x+7430.03x 2 -1430.81x 3 +131.13x 4 -4.41x 5 ;

[0037] The second reference plane intersects with the light-emitting surface of the lens to form a tenth curve, which satisfies the following formula:

[0038] Y = 4732.85 - 4093.85x + 1387.03x 2 -228.94x 3 +16.25x 4 -0.4022x 5 .

[0039] This allows the light-emitting surface to adjust the light emission angle to within ±13° in the first direction and within ±8° in the second direction, meeting the requirements of fog light patterns. Furthermore, through the independent design of these two curves, the three-dimensional freeform surface is decomposed into the coordinated control of two two-dimensional curves. Combined with deep coupling with the incident light surface, end-to-end light control is achieved within a millimeter-scale lens size. This also helps reduce the complexity of optical design and mold manufacturing, improves the convenience of lens production, and lowers manufacturing costs.

[0040] In some embodiments, along the first direction, the light-emitting surface includes a first region, a second region, a third region, a fourth region, and a fifth region arranged in sequence, and the optical axis passes through the third region; along the second direction, the light-emitting surface includes a sixth region, a seventh region, an eighth region, a ninth region, and a tenth region arranged in sequence, and the optical axis passes through the eighth region.

[0041] Along the first direction, the angle between the light rays emitted from the first region and the optical axis is greater than or equal to 9° and less than or equal to 13°; the angle between the light rays emitted from the second region and the optical axis is greater than or equal to 4.5° and less than or equal to 9°; the angle between the light rays emitted from the third region and the optical axis is greater than or equal to -5° and less than or equal to 5°; the angle between the light rays emitted from the fourth region and the optical axis is greater than or equal to -9° and less than or equal to -4.5°; and the angle between the light rays emitted from the fifth region and the optical axis is greater than or equal to -13° and less than or equal to -9°.

[0042] Along the second direction, the angle between the light emitted from the sixth region and the optical axis is greater than or equal to 5° and less than or equal to 8°; the angle between the light emitted from the seventh region and the optical axis is greater than or equal to 2° and less than or equal to 6°; the angle between the light emitted from the eighth region and the optical axis is greater than or equal to -3° and less than or equal to 3°; the angle between the light emitted from the ninth region and the optical axis is greater than or equal to -6° and less than or equal to -2°; and the angle between the light emitted from the tenth region and the optical axis is greater than or equal to -8° and less than or equal to -5°.

[0043] Thus, firstly, since the overall freeform surface mold requires ultra-precision polishing, resulting in high cost and low yield, this design decomposes the freeform surface of the light-emitting surface into multiple sub-regions, each of which can be processed independently, thereby helping to reduce costs and improve yield. Secondly, optimizing the light angle independently for each zone of the light-emitting surface can improve the spot or hotspot problems in related technologies, ensuring a smooth light transition and forming a uniform light pattern without dark areas. Furthermore, in this embodiment, there is overlap between the light distribution angles of some adjacent zones in the first or second direction, which allows for a natural light transition, thereby further eliminating dark areas in the light pattern and improving far-field uniformity. Thirdly, controlling the zone angle can reduce light scattering, ensuring that almost all the light emitted by the light source is utilized, thereby further improving luminous efficiency.

[0044] Secondly, embodiments of this application provide a vehicle light, characterized in that it includes the signal light module described in the first aspect.

[0045] This not only improves the luminous efficiency of the headlights but also allows for a smaller opening size design, which in turn enhances the vehicle's aesthetics and reduces energy consumption. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of the traffic light module provided in the embodiments of this application;

[0047] Figure 2 This is a structural schematic diagram of the traffic light module provided in an embodiment of this application from another perspective;

[0048] Figure 3 This is another structural schematic diagram of the signal light module provided in the embodiments of this application;

[0049] Figure 4 for Figure 1 A schematic diagram of one cross-sectional structure of the signal light module (with the circuit board removed);

[0050] Figure 5 for Figure 1 Another cross-sectional view of the signal light module (with the circuit board removed) is shown.

[0051] Figure 6 for Figure 1 A schematic diagram showing the light-emitting surface of the lens of the signal light module divided into regions along the first direction;

[0052] Figure 7 for Figure 1 A schematic diagram showing the light-emitting surface of the lens of the signal light module divided into regions along the second direction;

[0053] Figure 8 for Figure 1A schematic diagram of the overall grid division of the light-emitting surface of the lens of the signal light module shown;

[0054] Figure 9 for Figure 1 The diagram shows the principle of dividing the light-emitting surface of the lens of the signal light module into regions along the second direction;

[0055] Figure 10 for Figure 1 The diagram shows the principle of dividing the light-emitting surface of the lens of the signal light module into regions along the first direction.

[0056] Figure 11 for Figure 1 A schematic diagram of the reversing light pattern projected by the signal light module shown;

[0057] Figure 12 This is another structural schematic diagram of the signal light module provided in the embodiments of this application;

[0058] Figure 13 for Figure 12 A schematic diagram of the traffic light module from another perspective;

[0059] Figure 14 for Figure 12 A schematic diagram of one cross-sectional structure of the signal light module shown;

[0060] Figure 15 for Figure 12 Another cross-sectional structural diagram of the signal light module shown;

[0061] Figure 16 for Figure 12 A schematic diagram showing the light-emitting surface of the lens of the signal light module divided into regions along the first direction;

[0062] Figure 17 for Figure 12 A schematic diagram showing the light-emitting surface of the lens of the signal light module divided into regions along the second direction;

[0063] Figure 18 for Figure 12 A schematic diagram of the overall grid division of the light-emitting surface of the lens of the signal light module shown;

[0064] Figure 19 for Figure 12 A schematic diagram of the fog light pattern projected by the signal light module shown;

[0065] Figure 20 This is another structural schematic diagram of the signal light module provided in the embodiments of this application.

[0066] The annotations in the attached figures are explained as follows:

[0067] 10. Traffic light module;

[0068] 100. Light source;

[0069] 200. Lens; 210. Incident surface; 220. Exit surface; 221. Zone 1; 222. Zone 2; 223. Zone 3; 224. Zone 4; 225. Zone 5; 226. Zone 6; 227. Zone 7; 228. Zone 8; 229. Zone 9; 230. Zone 10; 201. First side; 202. Second side; 203. Third side; 204. Fourth side;

[0070] A1, First Curve; A2, Second Curve; A3, Third Curve; A4, Fourth Curve; A5, Fifth Curve; A6, Sixth Curve; A7, Seventh Curve; A8, Eighth Curve; A9, Ninth Curve; A10, Tenth Curve;

[0071] 300, circuit board; 400, lamp housing. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0073] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] like Figure 1 and Figure 2 As shown, in a first aspect, this application provides a traffic light module 10. The traffic light module 10 includes a light source 100 and a lens 200. The light source 100 is used to emit light. The lens 200 includes an incident light surface 210 and an exit light surface 220. The incident light surface 210 of the lens 200 is opposite to the light source 100, and the exit light surface 220 is located on the side of the light source 100 away from the incident light surface 210. The incident light surface 210 is a regular curved surface, and the exit light surface 220 is a free-form curved surface. The light emitted by the light source 100 is incident into the lens 200 through the regular curved surface, and a preset light pattern is projected in the far field by the free-form curved surface. The preset light pattern includes a reversing light pattern or a fog light pattern.

[0077] The light source 100 is used to emit visible light to provide light energy for the traffic lights. The light source 100 can be, for example, an LED (light-emitting diode) chip, and its power can be flexibly selected according to the type of traffic lights. It can emit white light or yellow or red light with a specific color temperature. Optionally, the traffic light module 10 may also include a circuit board 300, with each light source 100 mounted on a corresponding circuit board 300. The circuit board 300 can be an aluminum substrate or a ceramic substrate, which has a high thermal conductivity and helps to improve the heat dissipation effect of the light source 100.

[0078] The lens 200 can directly project the light emitted by the light source 100. By combining the light-incident surface 210 (regular curved surface) and the light-outceasing surface 220 (free curved surface), the light emitted by the light source 100 is optically modulated to achieve the preset light pattern.

[0079] Lens 200 can be made of materials such as polycarbonate (PC) or polymethyl methacrylate (PMMA). The incident surface 210 is a regular curved surface. A regular curved surface is a surface that can be generated by moving along a guide curve via a generatrix (generating line). The movement can include translation, rotation, and scanning. A regular curved surface can be accurately described by elementary functions or simple parametric equations. A regular curved surface can be convex or concave. When the incident surface 210 is convex, its main function is to converge light rays. A convex surface can initially converge the diverging light rays emitted by the light source 100, reducing the divergence angle and increasing the concentration of the light. When the incident surface 210 is concave, it serves to initially diverge the light rays, further spreading the light emitted by the light source 100 and expanding the coverage area.

[0080] The light-emitting surface 220 is a freeform surface. A freeform surface is an irregular optical surface that does not have axial rotational symmetry or translational symmetry constraints. Freeform surfaces have greater design freedom and can more precisely control the emission angle and direction of light.

[0081] With the cooperation of the light-incident surface 210 and the light-outceasing surface 220, the lens 200 can directly project the light from the light source 100 to form a preset light pattern, which may include a reversing light pattern or a fog light pattern.

[0082] In the reversing light scenario, the free-form surface design of the light-emitting surface 220 further modulates the light that has been initially modulated by the light-incident surface 210, forming a wide-angle light distribution in the horizontal direction and controlling the light angle in the vertical direction to avoid glare caused by the light shining upward, ensuring a uniform and bright lighting area at a certain distance behind the vehicle.

[0083] In fog light scenarios, the freeform surface of the light-emitting surface 220 modulates the light into a low-angle, slightly wider horizontal diffusion pattern. By precisely controlling the angle and distribution of the light, the fog light can be concentrated, reducing light scattering in the air and improving light penetration.

[0084] Of course, the preset light pattern can also be other types of signal light patterns, such as turn signal light pattern, brake light pattern, etc., and this application does not limit this.

[0085] The traffic light module 10 of this application embodiment, through the combined design of the light source 100 and the lens 200, directly projects the light from the light source 100 through the lens 200 to form a preset light pattern in the far field. Compared with related technologies that use reflector solutions or thick-walled solutions, in the traffic light module 10 of this application, the light-incident surface 210 of the lens 200 is directly close to the light source 100, and the light emitted from the light source 100 enters the lens 200 through a refraction path, which can reduce energy loss caused by reflection and total internal reflection. At the same time, the light-emitting surface 220 adopts a free-form surface design, which can reduce the scattering and waste of light, thereby improving the luminous flux utilization rate and thus improving the light output efficiency of the traffic light module 10. Furthermore, the regular curved surface of the light-incident surface 210 can efficiently guide the divergent light emitted by the light source 100 into the interior of the lens 200 to form a beam with a controllable angle. Subsequently, the beam exits through a freeform surface. Each tiny region on the freeform surface allows for precise light distribution, completing beam pattern conversion over a short distance. This results in a short optical path and concentrated energy, eliminating the need for a large emitting surface, long optical paths, or large optical components. This also helps reduce the height and width of the lens 200, further facilitating the design of a small aperture in the signal light module 10. Therefore, it is beneficial to meet the design requirements of a small aperture and high luminous efficiency for the signal light module 10.

[0086] Furthermore, the signal light module 10 of this application includes a light source 100 and a lens 200. Firstly, the light source 100 and lens 200 can be mass-produced as independent standard parts, suitable for large-scale applications, thereby reducing R&D and manufacturing costs. Secondly, the signal light module 10 has a simple structure, few parts, and a relatively simple manufacturing process, thus reducing production costs and improving manufacturing convenience. Furthermore, by adjusting the parameters and design of the freeform surface, different light patterns and functions of the signal light module 10 can be developed, achieving multi-purpose functionality and shortening the product development cycle, further reducing costs.

[0087] like Figure 3 As shown and referenced Figure 2 In some embodiments, there are multiple lenses 200 and light sources 100, and the lenses 200 and light sources 100 are arranged in a one-to-one correspondence. Two adjacent lenses 200 are spliced ​​along a first direction Y or a second direction Z. The first direction Y is the width direction of the lens 200, and the second direction Z is the height direction of the lens 200.

[0088] When the signal light module 10 is installed on the vehicle, the first direction Y is also the left-right direction of the vehicle, and the second direction Z is the height direction of the vehicle. Let the third direction X be perpendicular to the first direction Y and the second direction Z respectively. The third direction X is the thickness direction of the lens 200. Similarly, the third direction X is the front-back direction of the vehicle, and also the extension direction of the optical axis L.

[0089] In this embodiment, there are multiple lenses 200 and light sources 100, and they are in a one-to-one correspondence. The light from each light source 100 is emitted through a corresponding lens 200. Furthermore, adjacent lenses 200 can be joined together along a first direction Y or a second direction Z. Specifically, all lenses 200 can be joined together along the first direction Y, or all lenses 200 can be joined together along the second direction Z, or some lenses 200 can be joined together along the first direction Y and some lenses 200 can be joined together along the second direction Z. This application does not impose any restrictions on this.

[0090] Since each lens 200 is a pre-designed, identical standard component, it can be spliced ​​together to form a light-emitting surface with any opening shape. Then, by matching the luminous flux of the corresponding light source 100, it can adapt to different styling requirements and reduce the design time and cost of the signal lights. For example, in a certain vehicle model, according to styling requirements, the number of light sources 100 and lenses 200 needs to be set to N. In this case, the luminous flux of each light source 100 can be reduced to one-Nth of the luminous flux of the original light source 100 in the signal light module 10.

[0091] It should be noted that in this application, each light source 100, in conjunction with a corresponding lens 200, can project a preset signal light pattern in the far field. When there are multiple lenses 200 and light sources 100, a single lens 200 and its corresponding single light source 100 form a group, and multiple groups project the same signal light pattern. It is understandable that, since the size of a single lens 200 is relatively small, on the millimeter scale, while the size of the light pattern and the far-field distance are several meters, much larger than the size of a single lens 200, multiple lenses 200, when spliced ​​together, can achieve a large overlap in the projected light patterns. The superimposed light pattern also meets the requirements of the relevant signal light pattern, and the luminous flux is the product of the luminous flux of a single group and the total number of groups.

[0092] In some embodiments, the height of the lens 200 is less than or equal to 10 mm, and the width of the lens 200 is less than or equal to 14 mm.

[0093] As described above, this application achieves a small aperture size and high luminous efficiency optical design for the signal light through the combination of the light source 100 and the lens 200. Therefore, the lens 200 of the signal light module 10 achieves ultra-narrow aperture height and ultra-narrow aperture width. Specifically, the height of the lens 200 can be less than or equal to 10mm, and the width can be less than or equal to 14mm. This improves the structural compactness of the signal light module 10. Furthermore, given the current trend of vehicle headlight designs with small aperture sizes, a smaller aperture allows the signal light module 10 to better integrate with high and low beam headlight modules, greatly enriching the overall vehicle aesthetics. This also enhances the adaptability and application scenarios of the signal light module 10 in vehicles.

[0094] Optionally, the height of the lens 200 can be 10mm, 9.5mm, 9mm, 8.5mm, 8mm, etc., and can be flexibly designed according to the actual situation.

[0095] Optionally, the width of the lens 200 can be 14mm, 13.5mm, 13mm, 12.5mm, 12mm, 11.5mm, 11mm, 10.5mm, 10mm, etc., and can be flexibly designed according to the actual situation.

[0096] like Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments, the preset light pattern is a reversing light pattern, the regular curved surface is a concave cylindrical surface, the optical axis L of the lens 200 coincides with the light emission center F of the light source 100, and along the second direction Z, the line connecting the midpoint of the light-emitting surface 220 and the midpoint of the light-incident surface 210 does not coincide with the optical axis L. Specifically, along the first direction Y, the angle between the light ray emitted from the light-emitting surface 220 and the optical axis L is greater than or equal to -50° and less than or equal to 50°; along the second direction Z, the angle between the light ray emitted from the light-emitting surface 220 and the optical axis L is greater than or equal to -13° and less than or equal to 13°.

[0097] In this embodiment, the preset light pattern is a reversing light pattern, meaning that the signal light module 10 is a reversing light module. Specifically, the regular curved surface of the light-incident surface 210 is a concave cylindrical surface, which extends along a curve in the first direction Y and a straight line in the second direction Z. The cylindrical surface can achieve light divergence in the first direction Y, and the light is not deflected in the second direction Z. The optical axis L coincides with the light-emitting center F of the light source 100, which can ensure the utilization rate of light and improve the luminous flux.

[0098] The optical axis L is offset in the second direction Z. This setting allows the far-field light pattern to tilt downwards, avoiding upward glare. Furthermore, the light-emitting surface 220 constrains the emission angle of the emitted light in the first direction Y and the second direction Z, respectively. In the first direction Y, the angle between the emitted light and the optical axis L forms a horizontal constraint angle of ±50°, meeting the "wide illumination" requirement of the reversing light. In the second direction Z, the angle between the emitted light and the optical axis L forms a vertical constraint angle of ±13°, ensuring that the light is concentrated near the ground.

[0099] In this embodiment, the special design of the light-incident surface 210 of the concave cylindrical surface and the light-exit surface 220 of the offset free-form surface enables the design to meet the requirements of wide horizontal coverage and low vertical elevation angle of the reversing light pattern. On the one hand, it helps to improve the structural compactness of the reversing light and realize a miniaturized opening design; on the other hand, it helps to improve the luminous efficacy of the reversing light, exceeding 85%. Furthermore, it also helps to reduce the design cycle and production cost of the reversing light.

[0100] It should be noted that this embodiment uses a reversing light module as an example, and the light source 100 can be a single 0.5W-1W white LED. For example... Figure 4 As shown, the upper central region of the cross-section of the light-emitting surface 220 along the second direction Z is convex, transitioning downwards and then springing back to a concave surface. The central convex surface is used for the main bright spot area at the center of the light pattern, while the lower side is used to refract the light downwards. Figure 4 As shown, the outline of the light-emitting surface 220 along the first direction Y is not a smooth arc surface, but has tiny protrusions on both sides of the center, which refract the light to both sides.

[0101] Furthermore, such as Figure 4 and Figure 5 As shown, in some embodiments, the traffic light module 10 has a first reference surface S1 and a second reference surface S2. The first reference surface S1 passes through the optical axis L and is parallel to the second direction Z. The second reference surface S2 passes through the optical axis L and is parallel to the first direction Y. A coordinate system is established with the light-emitting center F as the origin O, the optical axis L as the X-axis, the first direction Y as the Y-axis, and the second direction Z as the Z-axis, wherein:

[0102] The first reference plane S1 intersects with the light-emitting surface 220 of the lens 200 to form a first curve A1, which satisfies the following formula:

[0103] z=10.122-12.346x+4.566x2-0.779x 3 +0.135x 4 +0.075x 5 ;

[0104] The second reference plane S2 intersects with the light-emitting surface 220 of the lens 200 to form a second curve A2, which satisfies the following formula:

[0105] y = 10.25 - 21.5x + 15.3x 2 -3.8x 3 +0.25x 4 -0.022x 5 .

[0106] This embodiment further proposes a specific design scheme for the freeform surface 220 when the signal light module 10 is a reversing light module. The first reference surface S1 passes through the optical axis L and is parallel to the Z-axis (second direction Z). Its intersection with the light-emitting surface 220 is the first curve A1, which determines the emission angle distribution of light in the vertical direction (Z-axis). The second reference surface S2 passes through the optical axis L and is parallel to the Y-axis (first direction Y). Its intersection with the light-emitting surface 220 is the second curve A2, which determines the emission angle distribution of light in the horizontal direction (Y-axis). It should be noted that in the above formulas, x represents the coordinate value on the X-axis, y represents the coordinate value on the Y-axis, and z represents the coordinate value on the Z-axis. It can be understood that in the first curve A1, y = 0, while in the second curve A2, z = 0.

[0107] Both the first curve A1 and the second curve A2 are fifth-order polynomials. Using these formulas, the specific parameters of the light-emitting surface 220 contour line after the lens 200 is cut along the first reference surface S1 or the second reference surface S2 can be obtained. This allows the light-emitting surface 220 to adjust the light emission angle within ±50° in the first direction Y and within ±13° in the second direction Z, meeting the requirements of reversing light patterns. Furthermore, through the independent design of these two curves, the three-dimensional freeform surface is decomposed into the coordinated control of two two-dimensional curves. Combined with deep coupling with the incident light surface, end-to-end light control is achieved within a millimeter-scale lens size. This also helps reduce the complexity of optical design and mold manufacturing, improves the ease of lens 200 fabrication, and reduces manufacturing costs.

[0108] like Figure 6 and Figure 7As shown, in some embodiments, along the first direction Y, the light-emitting surface 220 includes a first region 221, a second region 222, a third region 223, a fourth region 224, and a fifth region 225 arranged sequentially, with the optical axis L passing through the third region 223. Along the second direction Z, the light-emitting surface 220 includes a sixth region 226, a seventh region 227, and an eighth region 228 arranged sequentially, with the optical axis L passing through the seventh region 227. Along the first direction Y, the angle between the light emitted from the first region 221 and the optical axis L is greater than or equal to 35° and less than or equal to 50°; the angle between the light emitted from the second region 222 and the optical axis L is greater than or equal to 15° and less than or equal to 35°; and the angle between the light emitted from the third region 223 and the optical axis L... The angle between the light rays emitted from the fourth region 224 and the optical axis L is greater than or equal to -15° and less than or equal to 15°. The angle between the light rays emitted from the fifth region 225 and the optical axis L is greater than or equal to -50° and less than or equal to -35°. Along the second direction Z, the angle between the light rays emitted from the sixth region 226 and the optical axis L is greater than or equal to 8° and less than or equal to 13°. The angle between the light rays emitted from the seventh region 227 and the optical axis L is greater than or equal to -8° and less than or equal to 8°. The angle between the light rays emitted from the eighth region 228 and the optical axis L is greater than or equal to -13° and less than or equal to -8°.

[0109] This embodiment further proposes a specific light control scheme for the freeform surface 220 when the signal light module 10 is a reversing light module. The light-emitting surface 220 achieves millimeter-level precise control of the far-field light pattern through a grid design of five zones in the first direction Y and three zones in the second direction Z, combined with differentiated angle constraints.

[0110] Along the first direction Y, the freeform surface is divided into five regions. Region 223, the central region, is traversed by the optical axis L, allowing control over the light's coverage within a ±15° angle range along the first direction Y, providing central brightness. Regions 222 and 224 are located on either side of Region 223 along the first direction Y, covering angle ranges of 15° to 35° and -35° to -15° respectively. Regions 221 and 225 are located at the outer edges along the first direction Y, covering angle ranges of 35° to 50° and -50° to -35° respectively. This ensures the reversing light pattern provides a wide viewing angle along the first direction Y, guaranteeing both central illumination brightness and coverage.

[0111] Along the second direction Z, the beam is divided into three zones. Zone 7 (227) is the central zone, through which the optical axis L passes. It can control the light beam to cover an angle range of ±8° in the second direction Z, providing central brightness. Zones 6 (226) and 8 (228) are located on the two sides of Zone 7 (227) along the second direction Z, covering angle ranges of 8° to 13° and -13° to -8° respectively. This ensures that the reversing light provides a narrow viewing angle in the second direction Z, guaranteeing both central illumination brightness and ground illumination.

[0112] Through the aforementioned grid-based partitioning design, the light pattern of the reversing light module can be achieved. Firstly, since the overall freeform surface mold requires ultra-precision polishing, resulting in high cost and low yield, this design decomposes the freeform surface of the light-emitting surface 220 into multiple sub-regions, each of which can be processed independently, thereby reducing costs and improving yield. Secondly, each partition of the light-emitting surface 220 independently optimizes the light angle, which can improve the light spot or hot spot problems in related technologies, ensuring a smooth light transition and forming a uniform light pattern without dark areas. Thirdly, partition angle control can reduce light scattering, ensuring that almost all the light emitted by the light source 100 is utilized, requiring only lower-power LEDs to achieve high brightness, thus further improving luminous efficiency.

[0113] It is understood that in the reversing light module of this embodiment, the light-emitting surface 220 is divided into five regions in the first direction Y and into three regions in the second direction Z. There can be multiple criteria for dividing the regions. The following application will describe in detail one of the criteria for dividing the regions.

[0114] As mentioned above, please refer to Figure 4 , Figure 5 as well as Figures 8 to 10 The signal light module 10 has a first reference surface S1 and a second reference surface S2. The first reference surface S1 passes through the optical axis L and is parallel to the second direction Z. The second reference surface S2 passes through the optical axis L and is parallel to the first direction Y. Further, a first reference axis M1 and a second reference axis M2 are defined in the signal light module 10. Both the first reference axis M1 and the second reference axis M2 pass through the light emission center F. The first reference axis M1 is parallel to the second direction Z, and the second reference axis M2 is parallel to the first direction Y. The lens 200 has a first side 201 and a second side 202 opposite to each other along the first direction Y, and a third side 203 and a fourth side 204 opposite to each other along the second direction Z.

[0115] The following explains the specific process of dividing the light-emitting surface 220 into five regions in the first direction Y: First, as Figure 8 and Figure 10As shown, when viewed along the second direction Z, the line L1 connecting the luminous center F and the first side 201 has an angle α1 with the optical axis L; the line L2 connecting the luminous center F and the second side 202 has an angle α2 with the optical axis L. Then, the first reference surface S1 is rotated about the first reference axis M1 towards the first side 201. After each rotation by a first angle β1, the first reference surface S1 intersects with the light-emitting surface 220, forming the third curve A3 and the fourth curve A4 in sequence. Afterwards, the first reference surface S1 is rotated about the first reference axis M1 towards the second side 202. After each rotation by a second angle β2, the first reference surface S1 intersects with the light-emitting surface 220, forming the fifth curve A5 and the sixth curve A6 in sequence. At this point, the region between the third curve A3 and the fifth curve A5 is designated as the third region 223; the region between the third curve A3 and the fourth curve A4 is designated as the second region 222; the region between the fourth curve A4 and the first edge 201 is designated as the first region 221; the region between the fifth curve A5 and the sixth curve A6 is designated as the fourth region 224; and the region between the sixth curve A6 and the second edge 202 is designated as the fifth region 225. Since the side of the first reference surface M1 closest to the first edge 201 is divided into three regions, the value of the first angle β1 is greater than or equal to one-third of α1 and less than one-half of α1. Similarly, the value of the second angle β2 is greater than or equal to one-third of α2 and less than one-half of α2. Optionally, α1 can be equal to α2, and the first angle β1 can be equal to the second angle β2.

[0116] The following explains the specific process of dividing the light-emitting surface 220 into three regions in the second direction Z: (e.g.) Figure 8 and Figure 9 As shown, firstly, observing along the first direction Y, the line L3 connecting the luminous center F and the third side 203 has an angle α3 with the optical axis L; the line L4 connecting the luminous center F and the fourth side 204 has an angle α4 with the optical axis L. Then, the second reference surface S2 is rotated around the second reference axis M2 towards the direction closer to the third side 203. After rotating by a third angle β3, the second reference surface S2 intersects with the light-emitting surface 220 to form the seventh curve A7. Next, the second reference surface S2 is rotated around the second reference axis M2 towards the direction closer to the fourth side 204. After rotating by a fourth angle β4, the second reference surface S2 intersects with the light-emitting surface 220 to form the eighth curve A8. At this time, the region between the seventh curve A7 and the eighth curve A8 is the seventh region 227, the region between the seventh curve A7 and the third side 203 is the sixth region 226, and the region between the eighth curve A8 and the fourth side 204 is the eighth region 228. Since the second reference plane M2 is divided into two regions on the side closest to the third side 203, the value of the third angle β3 is greater than or equal to half of α3 and less than α3. Similarly, the value of the fourth angle β4 is greater than or equal to half of α4 and less than α4. Since the optical axis L is in an offset state in the second direction Z, α3 is less than α4.

[0117] This achieves the grid region division of the freeform surface, enabling precise control of light.

[0118] Furthermore, it is understood that in this embodiment, the freeform surface is divided into five regions along the first direction Y and three regions along the second direction Z, thus dividing the freeform surface into a total of fifteen micro-regions. For example... Figure 8 As shown, fifteen tiny regions are numbered 1, 2, 3, 4, ..., with the first direction Y as the row and the second direction Z as the column. Table 1 below illustrates the range of light emission angles modulated in each of these fifteen tiny regions.

[0119] Table 1. Range of emission angles of emitted light rays in different regions.

[0120] Area code First direction Y: Range of emission angle Second direction Z: Range of emission angle 1 35°～50° 8°～13° 2 15°～35° 8°～13° 3 -15°～15° 8°～13° 4 -35°～-15° 8°～13° 5 -50°～-35° 8°～13° 6 35°～50° -8°～8° 7 15°～35° -8°～8° 8 -15°～15° -8°～8° 9 -35°～-15° -8°～8° 10 -50°～-35° -8°～8° 11 35°～50° -13°～-8° 12 15°～35° -13°～-8° 13 -15°～15° -13°～-8° 14 -35°～-15° -13°～-8° 15 -50°～-35° -13°～-8°

[0121] Please refer to Figure 11 This is a schematic diagram of the reversing light pattern of the signal light module 10 according to the above design in an embodiment of this application. Figure 11 As can be seen, the reversing light pattern can meet the design requirements of uniform illumination, wide horizontal coverage, and low vertical elevation angle. The center point of the light pattern is shifted downward along the second direction Z to ensure that most of the light shines on the ground and reduce glare.

[0122] like Figures 12 to 15 As shown, in some embodiments, the preset light pattern is a fog light pattern, the regular curved surface is an outwardly convex arc surface, the optical axis L of the lens 200 coincides with the light emission center F of the light source 100, and along the second direction Z, the line connecting the midpoint of the light-emitting surface 220 and the midpoint of the light-incident surface 210 coincides with the optical axis L. Specifically, along the first direction Y, the angle between the light ray emitted from the light-emitting surface 220 and the optical axis L is greater than or equal to -13° and less than or equal to 13°; along the second direction Z, the angle between the light ray emitted from the light-emitting surface 220 and the optical axis L is greater than or equal to -8° and less than or equal to 8°.

[0123] In this embodiment, the preset light pattern is a fog light pattern, meaning that the signal light module 10 is a fog light module. It can be understood that it can be a front fog light module or a rear fog light module. Specifically, the regular curved surface of the light-incident surface 210 is a convex arc surface. The arc surface extends along the first direction Y curve and along the second direction Z curve. That is, the regular curved surface of the light-incident surface 210 has a double curvature, which can achieve a converging effect on light in both the first direction Y and the second direction Z, thereby reducing light scattering loss. Combined with the coincidence of the optical axis L and the light-emitting center F, this allows light to be efficiently guided into the interior of the lens 200, increasing the luminous flux.

[0124] The optical axis L is in a non-biased state, ensuring that the far-field light pattern is symmetrically distributed around the optical axis. Furthermore, the light-emitting surface 220 constrains the emission angle of the emitted light in the first direction Y and the second direction Z, respectively. In the first direction Y, the angle between the emitted light and the optical axis L forms a horizontal constraint angle of ±13°, ensuring a horizontal narrow beam and reducing the scattering of light by the fog. In the second direction Z, the angle between the emitted light and the optical axis L forms a vertical constraint angle of ±8°, preventing the light from shining on the upper layer of fog and causing glare.

[0125] In this embodiment, the fog light pattern can be designed through the special design of the light-incident surface 210 with its convex arc surface and the light-exit surface 220 with its free-form surface. The narrow angle combination of ±13° horizontally and ±8° vertically forms an approximately rectangular concentrated beam, which helps to improve the transmittance of the fog light and reduce scattering. On the one hand, it helps to improve the structural compactness of the fog light and realize a miniaturized opening design; on the other hand, it helps to improve the luminous efficacy of the fog light, exceeding 70%. Furthermore, it also helps to reduce the design cycle and production cost of the fog light.

[0126] It should be noted that, in this embodiment, a fog light module is used as an example. The light source 100 can be a 1W to 2W red LED with a luminous flux of 50Lm. The light-emitting surface 220 has a convex profile along the second direction Z, with the center of the convex surface used for the main bright spot area of ​​the light pattern center. The two sides of the light-emitting surface 220 along the first direction Y have shallow concave surfaces, and the center has a convex surface. The concave surfaces on both sides are smoothly connected to the central convex surface.

[0127] Furthermore, such as Figure 14 and Figure 15 As shown, in some embodiments, the signal light module 10 has a first reference surface S1 and a second reference surface S2. The first reference surface S1 passes through the optical axis L and is parallel to the second direction Z, and the second reference surface S2 passes through the optical axis L and is parallel to the first direction Y.

[0128] A coordinate system is established with the light-emitting center F as the origin O, the optical axis L as the X-axis, the first direction Y as the Y-axis, and the second direction Z as the Z-axis, wherein:

[0129] The first reference plane S1 intersects with the light-emitting surface 220 of the lens 200 to form the ninth curve A9, which satisfies the following formula:

[0130] Z=19563.54-19206.62x+7430.03x 2 -1430.81x 3 +131.13x 4 -4.41x 5 ;

[0131] The second reference plane S2 intersects with the light-emitting surface 220 of the lens 200 to form the tenth curve A10, which satisfies the following formula:

[0132] Y = 4732.85 - 4093.85x + 1387.03x 2 -228.94x 3 +16.25x 4 -0.4022x 5 .

[0133] This embodiment further proposes a specific design scheme for the freeform surface 220 when the signal light module 10 is a fog light module. The first reference surface S1 passes through the optical axis L and is parallel to the Z-axis (second direction Z). Its intersection with the light-emitting surface 220 is the ninth curve A9, which determines the emission angle distribution of light in the vertical direction (Z-axis). The second reference surface S2 passes through the optical axis L and is parallel to the Y-axis (first direction Y). Its intersection with the light-emitting surface 220 is the tenth curve A10, which determines the emission angle distribution of light in the horizontal direction (Y-axis). It should be noted that in the above formulas, x represents the coordinate value on the X-axis, y represents the coordinate value on the Y-axis, and z represents the coordinate value on the Z-axis. It can be understood that in the ninth curve A9, y = 0, and in the tenth curve A10, z = 0.

[0134] Both curve A9 (ninth degree) and curve A10 (tenth degree) are fifth-degree polynomials. Using these formulas, the specific parameters of the contour line of the light-emitting surface 220 of lens 200 after being cut along the first reference surface S1 or the second reference surface S2 can be obtained. This allows the light-emitting surface 220 to adjust the light emission angle within ±13° in the first direction Y and within ±8° in the second direction Z, meeting the requirements of fog light patterns. Furthermore, through the independent design of these two curves, the three-dimensional freeform surface is decomposed into the coordinated control of two two-dimensional curves. Combined with deep coupling with the incident surface 210, end-to-end light control is achieved within a millimeter-scale lens size. This also helps reduce the complexity of optical design and mold manufacturing, improves the ease of lens 200 fabrication, and reduces manufacturing costs.

[0135] like Figures 14 to 17As shown, in some embodiments, along the first direction Y, the light-emitting surface 220 includes a first region 221, a second region 222, a third region 223, a fourth region 224 and a fifth region 225 arranged in sequence, with the optical axis L passing through the third region 223. Along the second direction Z, the light-emitting surface 220 includes a sixth region 226, a seventh region 227, an eighth region 228, a ninth region 229 and a tenth region 230 arranged in sequence, with the optical axis L passing through the eighth region 228. Along the first direction Y, the angle between the light ray emitted from the first region 221 and the optical axis L is greater than or equal to 9° and less than or equal to 13°; the angle between the light ray emitted from the second region 222 and the optical axis L is greater than or equal to 4.5° and less than or equal to 9°; the angle between the light ray emitted from the third region 223 and the optical axis L is greater than or equal to -5° and less than or equal to 5°; the angle between the light ray emitted from the fourth region 224 and the optical axis L is greater than or equal to -9° and less than or equal to -4.5°; and the angle between the light ray emitted from the fifth region 225 and the optical axis L is greater than or equal to -13° and less than or equal to -9°. 9°; along the second direction Z, the angle between the light ray emitted from the sixth zone 226 and the optical axis L is greater than or equal to 5° and less than or equal to 8°; the angle between the light ray emitted from the seventh zone 227 and the optical axis L is greater than or equal to 2° and less than or equal to 6°; the angle between the light ray emitted from the eighth zone 228 and the optical axis L is greater than or equal to -3° and less than or equal to 3°; the angle between the light ray emitted from the ninth zone 229 and the optical axis L is greater than or equal to -6° and less than or equal to -2°; and the angle between the light ray emitted from the tenth zone 230 and the optical axis L is greater than or equal to -8° and less than or equal to -5°.

[0136] This embodiment further proposes a specific light control scheme for the freeform surface 220 when the signal light module 10 is a fog light module. The light-emitting surface 220 achieves millimeter-level precise control of the far-field light pattern through a grid design of five zones in the first direction Y and five zones in the second direction Z, combined with differentiated angle constraints.

[0137] Along the first direction Y, the system is divided into five regions. Region 223 is the central region, through which the optical axis L passes, allowing control over the light's coverage within a ±5° angle range along the first direction Y, providing central brightness. Regions 222 and 224 are located on either side of Region 223 along the first direction Y, covering angle ranges of 4.5° to 9° and -9° to -4.5° respectively, achieving a smooth light transition. Regions 221 and 225 are located on the two edge regions along the first direction Y, covering angle ranges of 9° to 13° and -13° to -9° respectively, achieving wide-area supplementary lighting on the left and right edges.

[0138] Along the second direction Z, the light is also divided into five regions. Region 8 (228) is the central region, through which the optical axis L passes. It can control the light's coverage within an angle range of ±3° in the second direction Z, providing central brightness. Regions 7 (227) and 9 (229) are located on either side of Region 8 (228) along the second direction Z, covering angle ranges of 2° to 6° and -6° to -2° respectively, achieving a smooth transition of light. Regions 6 (226) and 10 (230) are located on the two edge regions along the second direction Z, covering angle ranges of 5° to 8° and -8° to -5° respectively, ensuring the vertical emission range of light, reducing upward reflection glare in foggy weather, and improving visibility.

[0139] Through the aforementioned gridded partitioning design, the light pattern of the fog light module can be realized. Firstly, since the overall freeform surface mold requires ultra-precision polishing, resulting in high cost and low yield, this design decomposes the freeform surface of the light-emitting surface 220 into multiple sub-regions, each of which can be processed independently, thereby reducing costs and improving yield. Secondly, each partition of the light-emitting surface 220 independently optimizes the light angle, which can improve the light spot or hot spot problems in related technologies, ensuring a smooth light transition and forming a uniform light pattern without dark areas. Furthermore, in this embodiment, in the first direction Y or the second direction Z, there is overlap between the light distribution angles of some adjacent partitions, which allows for a natural light transition, further eliminating dark areas in the light pattern and improving far-field uniformity. Thirdly, partition angle control can reduce light scattering, ensuring that almost all the light emitted by the light source 100 is utilized, requiring only low-power LEDs to achieve high brightness, thus further improving luminous efficiency.

[0140] It is understood that in the fog light module of this embodiment, the light-emitting surface 220 is divided into five regions in the first direction Y and also in the second direction Z. The boundary criteria for the above-mentioned region division can be the same as the boundary criteria for the free-form surface mesh division of the light-emitting surface 220 of the aforementioned reversing light module, which will not be repeated here.

[0141] Furthermore, in this embodiment, the freeform surface is divided into five regions along the first direction Y and five regions along the second direction Z, thus dividing the freeform surface into a total of twenty-five micro-regions. For example... Figure 18 As shown, twenty-five tiny regions are numbered 1, 2, 3, 4...25, with the first direction Y as the row and the second direction Z as the column. Table 2 below illustrates the range of light modulation exit angles for each of these twenty-five tiny regions.

[0142] Table 2. Range of emission angles of emitted light from different areas in the fog light module.

[0143] Area code First direction Y: Range of emission angle Second direction Z: Range of emission angle 1 9°～13° 5°～8° 2 4.5°～9° 5°～8° 3 -5°～5° 5°～8° 4 -9°～-4.5° 5°～8° 5 -13°～-9° 5°～8° 6 9°～13° 2°～6° 7 4.5°～9° 2°～6° 8 -5°～5° 2°～6° 9 -9°～-4.5° 2°～6° 10 -13°～-9° 2°～6° 11 9°～13° -3°～3° 12 4.5°～9° -3°～3° 13 -5°～5° -3°～3° 14 -9°～-4.5° -3°～3° 15 -13°～-9° -3°～3° 16 9°～13° -6°～-2° 17 4.5°～9° -6°～-2° 18 -5°～5° -6°～-2° 19 -9°～-4.5° -6°～-2° 20 -13°～-9° -6°～-2° 21 9°～13° -8°～-5° 22 4.5°～9° -8°～-5° 23 -5°～5° -8°～-5° 24 -9°～-4.5° -8°～-5° 25 -13°～-9° -8°～-5°

[0144] Please refer to Figure 19 This is a schematic diagram of the fog light pattern of the signal light module 10 according to the above design in an embodiment of this application. Figure 19 It is evident that fog light patterns can meet the design requirements of uniform illumination, narrow beam, and high penetration.

[0145] This application describes a specific design scheme for the signal light module 10 to project a reversing light pattern or a fog light pattern. It is understood that by designing the light-emitting surface 220 of the free-form surface and the light-incident surface 210 of the regular surface in combination, more types of light patterns can be realized, such as turn signal patterns and brake light patterns. Thus, the signal light module 10 using this optical scheme is not limited to a reversing light module or a fog light module, but can also be other types of signal lights. This application does not impose any restrictions on this.

[0146] Furthermore, the number of regions divided by the grid on the freeform surface can be flexibly set according to actual conditions. That is, along the first direction Y, the light-emitting surface 220 can be divided into multiple first light-emitting regions, and along the second direction Z, the light-emitting surface 220 can be divided into multiple second light-emitting regions. The optical axis L passes through the middle first light-emitting region along the first direction Y and the middle second light-emitting region along the second direction Z. Along the first direction Y, the light rays emitted from each first light-emitting region together constitute the preset light pattern's light distribution angle range along the first direction Y, and along the second direction Z, the light rays emitted from each second light-emitting region together constitute the preset light pattern's light distribution angle range along the second direction Z.

[0147] like Figure 20 As shown, in some embodiments, the signal light module 10 further includes a lamp housing 400, and the lens 200 can be directly connected to the opening of the lamp housing 400. The circuit board 300 and the light source 100 are both disposed within the receiving cavity formed by the lamp housing 400 and the lens 200. In this way, the circuit board 300 and the light source 100 can be installed and fixed, thereby projecting the desired preset light pattern in the far field.

[0148] Of course, in this case, the lens 200 is directly exposed, which is not conducive to improving its service life. Therefore, in some other embodiments, the signal light module 10 also includes a lamp cover (not shown in the figure), which can be placed over the lens 200 and connected to the lamp housing 400. The lamp cover only serves a protective function and does not modulate the light.

[0149] Secondly, embodiments of this application propose a vehicle light including the signal light module 10 described in the first aspect. This not only improves the luminous efficacy of the vehicle light but also allows for a smaller opening size design, thereby enhancing the vehicle's aesthetics and reducing energy consumption.

[0150] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A traffic light module, characterized in that, include: A light source, which is used to emit light; A lens, comprising an incident light surface and an exit light surface, wherein the incident light surface of the lens is opposite to the light source, and the exit light surface is located on the side of the light source opposite to the incident light surface; The light-incident surface is a regular curved surface, and the light-exiting surface is a free-form curved surface. The light emitted by the light source is incident into the lens through the regular curved surface, and a preset light pattern is projected in the far field by the free-form curved surface. The preset light pattern includes a reversing light pattern or a fog light pattern.

2. The traffic light module according to claim 1, characterized in that, There are multiple lenses and light sources, and each lens and light source corresponds to another lens. Adjacent lenses are spliced ​​together along a first direction or a second direction. The first direction is the width direction of the lens, and the second direction is the height direction of the lens.

3. The traffic light module according to claim 1, characterized in that, The height of the lens is less than or equal to 10 mm, and the width of the lens is less than or equal to 14 mm.

4. The traffic light module according to claim 1, characterized in that, The preset light pattern is a reversing light pattern; The regular curved surface is a concave cylindrical surface. The optical axis of the lens coincides with the light-emitting center of the light source. Along the second direction, the line connecting the midpoint of the light-emitting surface and the midpoint of the light-incident surface does not coincide with the optical axis. Wherein, along the first direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -50° and less than or equal to 50°; Along the second direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -13° and less than or equal to 13°, the first direction is the width direction of the lens, and the second direction is the height direction of the lens.

5. The traffic light module according to claim 4, characterized in that, The signal light module has a first reference surface and a second reference surface. The first reference surface passes through the optical axis and is parallel to the second direction, and the second reference surface passes through the optical axis and is parallel to the first direction. A coordinate system is established with the light-emitting center as the origin, the optical axis as the X-axis, the first direction as the Y-axis, and the second direction as the Z-axis, wherein: The first reference surface intersects with the light-emitting surface to form a first curve, which satisfies the following formula: z=10.122-12.346x+4.566x2-0.779x 3 +0.135x 4 +0.075x 5 ; The second reference surface intersects with the light-emitting surface to form a second curve, which satisfies the following formula: y=10.25-21.5x+15.3x 2 -3.8x 3 +0.25x 4 -0.022x 5 。 6. The traffic light module according to claim 4, characterized in that, Along the first direction, the light-emitting surface includes a first region, a second region, a third region, a fourth region, and a fifth region arranged in sequence, and the optical axis passes through the third region. Along the second direction, the light-emitting surface includes a sixth region, a seventh region, and an eighth region arranged in sequence, and the optical axis passes through the seventh region. Along the first direction, the angle between the light rays emitted from the first region and the optical axis is greater than or equal to 35° and less than or equal to 50°; the angle between the light rays emitted from the second region and the optical axis is greater than or equal to 15° and less than or equal to 35°; the angle between the light rays emitted from the third region and the optical axis is greater than or equal to -15° and less than or equal to 15°; the angle between the light rays emitted from the fourth region and the optical axis is greater than or equal to -35° and less than or equal to -15°; and the angle between the light rays emitted from the fifth region and the optical axis is greater than or equal to -50° and less than or equal to -35°. Along the second direction, the angle between the light emitted from the sixth region and the optical axis is greater than or equal to 8° and less than or equal to 13°, the angle between the light emitted from the seventh region and the optical axis is greater than or equal to -8° and less than or equal to 8°, and the angle between the light emitted from the eighth region and the optical axis is greater than or equal to -13° and less than or equal to -8°.

7. The traffic light module according to claim 1, characterized in that, The preset light pattern is a fog light pattern; The regular curved surface is an outwardly convex arc surface, the optical axis of the lens coincides with the light emission center of the light source, and along the second direction, the line connecting the midpoint of the light-emitting surface and the midpoint of the light-incident surface coincides with the optical axis; Wherein, along the first direction, the angle between the light emitted from the light-emitting surface and the optical axis is greater than or equal to -13° and less than or equal to 13°; Along the second direction, the angle between the light rays emitted from the light-emitting surface and the optical axis is greater than or equal to -8° and less than or equal to 8°, where the first direction is the width direction of the lens and the second direction is the height direction of the lens.

8. The traffic light module according to claim 7, characterized in that, The signal light module has a first reference surface and a second reference surface. The first reference surface passes through the optical axis and is parallel to the second direction, and the second reference surface passes through the optical axis and is parallel to the first direction. A coordinate system is established with the light-emitting center as the origin, the optical axis as the X-axis, the first direction as the Y-axis, and the second direction as the Z-axis, wherein: The first reference surface intersects with the light-emitting surface to form a ninth curve, which satisfies the following formula: z=19563.54-19206.62x+7430.03x 2 -1430.81x 3 +131.13x 4 -4.41x 5 ; The second reference surface intersects with the light-emitting surface to form a tenth curve, which satisfies the following formula: y=4732.85-4093.85x+1387.03x 2 -228.94x 3 +16.25x 4 -0.4022x 5 。 9. The traffic light module according to claim 7, characterized in that, Along the first direction, the light-emitting surface includes a first region, a second region, a third region, a fourth region, and a fifth region arranged in sequence, and the optical axis passes through the third region. Along the second direction, the light-emitting surface includes a sixth region, a seventh region, an eighth region, a ninth region, and a tenth region arranged in sequence, and the optical axis passes through the eighth region. Along the first direction, the angle between the light rays emitted from the first region and the optical axis is greater than or equal to 9° and less than or equal to 13°; the angle between the light rays emitted from the second region and the optical axis is greater than or equal to 4.5° and less than or equal to 9°; the angle between the light rays emitted from the third region and the optical axis is greater than or equal to -5° and less than or equal to 5°; the angle between the light rays emitted from the fourth region and the optical axis is greater than or equal to -9° and less than or equal to -4.5°; and the angle between the light rays emitted from the fifth region and the optical axis is greater than or equal to -13° and less than or equal to -9°. Along the second direction, the angle between the light emitted from the sixth region and the optical axis is greater than or equal to 5° and less than or equal to 8°; the angle between the light emitted from the seventh region and the optical axis is greater than or equal to 2° and less than or equal to 6°; the angle between the light emitted from the eighth region and the optical axis is greater than or equal to -3° and less than or equal to 3°; the angle between the light emitted from the ninth region and the optical axis is greater than or equal to -6° and less than or equal to -2°; and the angle between the light emitted from the tenth region and the optical axis is greater than or equal to -8° and less than or equal to -5°.

10. A vehicle light, characterized in that, Includes the signal light module as described in any one of claims 1-9.

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