Signal lamp module and vehicle lamp

Abstract

The invention 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] The present application relates to the technical field of vehicle lights, and in particular to a signal light module and a vehicle light. Background Art

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

[0003] Currently, the main optical solutions for traffic lights include reflector solutions and thick-wall solutions. Light relies on the mirror reflection of the reflective surface or the total reflection / refraction of the thick-wall structure to form the signal light shape.

[0004] However, the aforementioned reflector solutions suffer from absorption and scattering losses from the reflective coating, while thick-wall solutions suffer from material absorption and interface reflection losses, resulting in significant loss of light efficiency. Furthermore, to maximize light collection, the reflective surfaces or thick-walled components are designed to be large, resulting in a larger light-emitting aperture. Consequently, current signal light optical solutions struggle to achieve high light efficiency within a compact design. Summary of the Invention

[0005] The embodiments of the present application provide a signal light module and a vehicle lamp, aiming to improve the problems of a large opening size and low light efficiency of the signal light module in the related art.

[0006] In a first aspect, an embodiment of the present application proposes a signal light module, comprising: a light source, which is used to emit light; a lens, which comprises a light incident surface and a light emitting surface, the light incident surface of the lens is opposite to the light source, and the light emitting surface is located on the side of the light source away from the light incident surface; wherein, the light incident surface is a regular curved surface, and the light emitting surface is a free curved surface, the light emitted by the light source is incident into the lens via the regular curved surface, and the free curved surface projects a preset light pattern in the far field, and the preset light pattern includes a reversing light pattern or a fog light pattern.

[0007] In the signal lamp module according to the embodiments of the present application, through the combined design of a light source and a lens, the light of the light source is directly projected through the lens, and a preset light pattern is formed in the far field. Compared with the related art that adopts a mirror scheme, a thick-wall scheme, etc., in the signal lamp module of the present application, the light incident surface of the lens is directly close to the light source, and the emitted light of the light source enters the lens through a refraction path, which can reduce the energy loss caused by reflection and total reflection. At the same time, the light-emitting surface adopts a free-form surface design, which can reduce the scattering waste of light, thereby being beneficial to improving the light flux utilization rate, and further being beneficial to improving the light-emitting efficiency of the signal lamp module. Further, the regular surface of the light incident surface can efficiently guide the divergent light emitted by the light source into the interior of the lens, forming a beam with controllable angles. Then, the beam is emitted through the free-form surface, and each tiny area on the free-form surface can achieve precise light distribution, complete the light pattern conversion within a short distance, with a short optical path and concentrated energy. It neither requires a large light-emitting surface nor a long optical path or large-sized optical elements, thus being also beneficial to reducing the height and width of the lens, and further being beneficial to realizing the design of a small opening size of the signal lamp module. Therefore, it is beneficial to realize the design requirements of a small opening size and high light efficiency of the signal lamp module.

[0008] In some embodiments, there are multiple lenses and multiple light sources, the lenses and the light sources correspond one by one, and two adjacent lenses are spliced 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.

[0009] Since each lens is a designed identical standard part, through the splicing method, a shaped light-emitting surface with an arbitrary opening shape can be formed. Then, by matching the light flux of the corresponding light source, it can not only adapt to different shaping requirements but also reduce the design time and cost of the signal lamp.

[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] In this way, on the one hand, it is beneficial to improve the structural compactness of the signal lamp module. On the other hand, currently, vehicles are pursuing the design of vehicle lamps with a small opening size. As the opening size becomes smaller, the signal lamp module can be better matched with the high and low beam vehicle lamp modules, thus greatly enriching the styling expression of the whole vehicle. Therefore, it is also beneficial to improve the adaptability and application scenarios of the signal lamp module on vehicles.

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

[0013] The regular surface is a concave cylindrical surface, the optical axis of the lens coincides with the light-emitting center of the light source, and along the second direction, the connection line between 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 ray 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 ray 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, through the special design of the light-incident surface of the concave cylindrical surface and the light-emitting surface of the free-form surface with offset setting, the requirements of horizontal wide coverage and vertical low elevation angle of the reverse light pattern can be achieved. On the one hand, it is beneficial to improve the structural compactness of the reverse light and realize a small-sized opening design. On the other hand, it is beneficial to improve the light efficiency of the reverse light, and the light efficiency exceeds 85%. Moreover, it is also beneficial to reduce the design cycle and production cost of the reverse light.

[0017] In some embodiments, the signal lamp 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;

[0018] Taking 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, a coordinate system is established, where:

[0019] The intersection of the first reference surface and the light-emitting surface of the lens forms a first curve, and the first curve satisfies the following formula:

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

[0021] The intersection of the second reference surface and the light-emitting surface of the lens forms a second curve, and the second curve satisfies the following formula:

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

[0023] Thus, the light-emitting surface can adjust the light-emitting angle of the light within ±50° in the first direction and within ±13° in the second direction, meeting the requirements of the reverse light pattern. In addition, through the independent design of the above two curves, the three-dimensional free surface is decomposed into the coordinated regulation of two two-dimensional curves, and then combined with the deep coupling of the light-incident surface, the full-link regulation of the light is completed within the millimeter-sized lens, which is also conducive to reducing the complexity of optical design and mold manufacturing, improving the convenience of lens manufacturing, and reducing the manufacturing cost.

[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 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 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 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 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 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] In this way, on the one hand, since the overall free surface mold requires ultra-precision polishing, which is costly and has a low yield, this design decomposes the free surface of the light-emitting surface into multiple sub-regions, and each sub-region can be independently processed, which is conducive to reducing costs and improving the yield. On the other hand, each partition of the light-emitting surface independently optimizes the light angle, which can improve the spot or hot spot problems in the related art, ensure the smooth transition of the light, and form a uniform light pattern without dark areas. On the third hand, the partition angle control can reduce the scattering of the light, and almost all the light emitted by the light source is utilized, which is conducive to further improving the light efficiency.

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

[0029] The regular surface is a convex arc 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 midpoints of the light-emitting surface and the light-incident surface coincides with the optical axis.

[0030] Among them, along the first direction, the angle between the light ray 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 ray 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, through the special design of the light-incident surface of the convex arc surface and the light-emitting surface of the free-form surface, the design of the fog lamp light pattern can be realized. The narrow-angle combination of horizontal ±1 degrees and vertical ±8 degrees forms an approximately rectangular concentrated light beam, which is beneficial to improving the penetration rate of the fog lamp light and reducing scattering. On the one hand, it is beneficial to improving the structural compactness of the fog lamp and realizing a small-sized opening design. On the other hand, it is beneficial to improving the light efficiency of the fog lamp, and the light efficiency exceeds 70%. Moreover, it is also beneficial to reducing the design cycle and production cost of the fog lamp.

[0033] In some embodiments, the signal lamp 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. The second reference surface passes through the optical axis and is parallel to the first direction.

[0034] Taking 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, a coordinate system is established, where:

[0035] The intersection of the first reference surface and the light-emitting surface of the lens forms a ninth curve, and the ninth curve satisfies the following formula:

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

[0037] The intersection of the second reference surface and the light-emitting surface of the lens forms a tenth curve, and the tenth curve satisfies the following formula:

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

[0039] Thus, the light-emitting surface can adjust the light-emitting angle of the light within ±13° in the first direction and within ±8° in the second direction, meeting the requirements of the fog lamp light pattern. In addition, through the independent design of the above two curves, the three-dimensional freeform surface is decomposed into the collaborative regulation of two two-dimensional curves, and then combined with the deep coupling with the light-incident surface, the full-link regulation of the light is completed within the millimeter-level lens size. Therefore, it is also beneficial to reduce the complexity of optical design and mold manufacturing, improve the convenience of lens manufacturing, and reduce the manufacturing cost.

[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 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 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 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 emitted from the fourth region and the optical axis is greater than or equal to -9° and less than or equal to -4.5°. The angle between the light 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°. 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, in the first aspect, since the overall free-form surface mold requires ultra-precise polishing, which is costly and has a low yield, in this design, the free-form surface of the light-emitting surface is decomposed into multiple sub-regions, and each sub-region can be processed independently, which is beneficial to reducing costs and improving the yield. In the second aspect, the light angle of each partition on the light-emitting surface is independently optimized, which can improve the problems of light spots or hot spots in the related art, ensure smooth transition of light, and form a light pattern without dark areas. Moreover, in this embodiment, in the first direction or the second direction, there is an overlap between the light distribution angles of some adjacent partitions, so that the light can achieve a natural transition, which is beneficial to further eliminating the dark areas of the light pattern and improving the far-field uniformity. In the third aspect, the partition angle control can reduce the scattering of light, and almost all the light emitted by the light source is utilized, which is beneficial to further improving the light efficiency.

[0044] In the second aspect, an embodiment of the present application provides a vehicle lamp, which is characterized by including the signal lamp module described in the first aspect.

[0045] Thus, it is beneficial to improve the light-emitting efficiency of the vehicle lamp, and at the same time, the small opening size design of the vehicle lamp can be realized, which is further beneficial to improving the aesthetics of the vehicle and reducing the energy consumption of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic structural diagram of the signal lamp module provided by an embodiment of the present application;

[0047] Figure 2 It is a schematic structural diagram of the signal lamp module provided by an embodiment of the present application from another perspective;

[0048] Figure 3 It is another schematic structural diagram of the signal lamp module provided by an embodiment of the present application;

[0049] Figure 4 It is Figure 1 One of the schematic cross-sectional structures of the signal lamp module (removing the circuit board) shown;

[0050] Figure 5 It is Figure 1 Another schematic cross-sectional structure of the signal lamp module (removing the circuit board) shown;

[0051] Figure 6 It is Figure 1 A schematic diagram of dividing the light-emitting surface of the lens of the signal lamp module along the first direction;

[0052] Figure 7 It is Figure 1 A schematic diagram of dividing the light-emitting surface of the lens of the signal lamp module along the second direction;

[0053] Figure 8 It is Figure 1Schematic diagram of the total grid division of the light-emitting surface of the lens of the signal lamp module shown;

[0054] Figure 9 is Figure 1 Schematic diagram of the principle of dividing the light-emitting surface of the lens of the signal lamp module shown along the second direction;

[0055] Figure 10 is Figure 1 Schematic diagram of the principle of dividing the light-emitting surface of the lens of the signal lamp module shown along the first direction;

[0056] Figure 11 is Figure 1 Schematic diagram of the reverse light pattern projected by the signal lamp module shown;

[0057] Figure 12 Another structural schematic diagram of the signal lamp module provided by the embodiment of the present application;

[0058] Figure 13 is Figure 12 Structural schematic diagram of the signal lamp module shown from another perspective;

[0059] Figure 14 is Figure 12 One of the sectional structural schematic diagrams of the signal lamp module shown;

[0060] Figure 15 is Figure 12 Another sectional structural schematic diagram of the signal lamp module shown;

[0061] Figure 16 is Figure 12 Schematic diagram of dividing the light-emitting surface of the lens of the signal lamp module shown along the first direction;

[0062] Figure 17 is Figure 12 Schematic diagram of dividing the light-emitting surface of the lens of the signal lamp module shown along the second direction;

[0063] Figure 18 is Figure 12 Schematic diagram of the total grid division of the light-emitting surface of the lens of the signal lamp module shown;

[0064] Figure 19 is Figure 12 Schematic diagram of the fog light pattern projected by the signal lamp module shown;

[0065] Figure 20 Another structural schematic diagram of the signal lamp module provided by the embodiment of the present application.

[0066] The descriptions of the reference numerals in the figure are as follows:

[0067] 10. Signal lamp module;

[0068] 100. Light source;

[0069] 200. Lens; 210. Light incident surface; 220. Light exit surface; 221. First zone; 222. Second zone; 223. Third zone; 224. Fourth zone; 225. Fifth zone; 226. Sixth zone; 227. Seventh zone; 228. Eighth zone; 229. Ninth zone; 230. Tenth zone; 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 mode

[0072] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0073] In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0074] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0075] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] like Figure 1 and Figure 2 As shown, in a first aspect, an embodiment of the present application provides a signal light module 10. The signal 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 a light incident surface 210 and a light emitting surface 220. The light incident surface 210 of the lens 200 is opposite to the light source 100, and the light emitting surface 220 is located on the side of the light source 100 away from the light incident surface 210. The light incident surface 210 is a regular curved surface, and the light emitting surface 220 is a free-form surface. The light emitted by the light source 100 is incident on the lens 200 via the regular curved surface, and the free-form surface projects a preset light pattern in the far field. 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, providing optical energy for the signal light. For example, the light source 100 can be an LED (light-emitting diode) chip. The power can be flexibly selected depending on the type of signal light, and it can emit white light or yellow or red light of a specific color temperature. Optionally, the signal light module 10 can 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 or ceramic substrate with high thermal conductivity, which helps 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, and optically modulate the light emitted by the light source 100 through the combination of the light incident surface 210 (regular curved surface) and the light emitting surface 220 (free curved surface) to achieve a preset light pattern.

[0079] The lens 200 can be made of materials such as polycarbonate (PC) and polymethylmethacrylate (PMMA). The light incident surface 210 is a regular curved surface. A regular curved surface refers to a surface that can be generated by moving a generatrix (generating line) along a guide curve. The movement modes include translation, rotation, scanning, etc. The regular curved surface can be accurately described by elementary functions or simple parametric equations. A regular curved surface can be a convex surface or a concave surface. When the light incident surface 210 is a convex surface, its main function is to converge light. The convex surface can initially converge the divergent light emitted by the light source 100, reduce the divergence angle of the light, and increase the concentration of the light. When the light incident surface 210 is a concave surface, it plays the role of initially diverging the light, so that the light emitted by the light source 100 is further diffused, and the coverage range of the light is expanded.

[0080] The light emitting surface 220 is a free-form surface. A free-form surface refers to an irregular optical surface without axial rotational symmetry or translational symmetry constraints. A free-form surface has a greater degree of design freedom and can more precisely control the angle and direction of light emission.

[0081] With the cooperation of the light incident surface 210 and the light emitting surface 220 , the lens 200 can directly project the light from the light source 100 to form a preset light pattern, which includes 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 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 upward light, thereby ensuring a uniform and brightly illuminated area at a certain distance behind the vehicle.

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

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

[0085] The signal lamp module 10 according to the embodiment of the present application projects the light of the light source 100 directly through the lens 200 through the combined design of the light source 100 and the lens 200 to form a preset light pattern in the far field. Compared with the related art that adopts a mirror scheme, a thick wall scheme, etc., in the signal lamp module 10 of the present application, the light incident surface 210 of the lens 200 is directly close to the light source 100, and the emitted light of the light source 100 enters the lens 200 through a refraction path, which can reduce the energy loss caused by reflection and total reflection. At the same time, the light emitting surface 220 adopts a free-form surface design, which can reduce the scattering waste of light, thereby being beneficial to improving the light flux utilization rate, and further being beneficial to improving the light emitting efficiency of the signal lamp module 10. Further, the regular surface of the light incident surface 210 can efficiently guide the divergent light emitted by the light source 100 into the lens 200 to form a beam with 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, complete the light pattern conversion within a short distance, with a short optical path and concentrated energy. Neither a large-area light emitting surface nor a long optical path or large-size optical elements are required, which is also beneficial to reducing the height and width of the lens 200, and further beneficial to realizing the small opening size design of the signal lamp module 10. Thus, it is beneficial to realize the design requirements of the small opening size and high light efficiency of the signal lamp module 10.

[0086] In addition, the signal lamp module 10 of the present application includes a light source 100 and a lens 200. First, the light source 100 and the lens 200 can be mass-produced as an independent standard component, which is suitable for large-scale application, thereby being beneficial to reducing the R & D and manufacturing costs. Second, the structure of the signal lamp module 10 is simple, the number of components is small, and the production process is relatively simple, which is beneficial to reducing the production cost and improving the manufacturing convenience. Third, by adjusting the parameters and design of the free-form surface, the development of signal lamp modules 10 with different light patterns and functions can be realized, achieving multiple functions with one module, which is beneficial to shortening the R & D cycle of the product and further reducing the cost.

[0087] As Figure 3 shown and referring to Figure 2 , in some embodiments, there are multiple lenses 200 and light sources 100, and the lenses 200 and the light sources 100 are arranged in one-to-one correspondence. Two adjacent lenses 200 are spliced along the first direction Y or the 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 lamp module 10 is installed on a 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. Denote that the third direction X is 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 is also the extending direction of the optical axis L.

[0089] In this embodiment, there are multiple lenses 200 and multiple light sources 100, and they are in a one-to-one correspondence. The light of each light source 100 is emitted through a corresponding lens 200. Further, two adjacent lenses 200 can be spliced along the first direction Y or the second direction Z. Specifically, all the lenses 200 are spliced along the first direction Y, or all the lenses 200 are spliced along the second direction Z, or some of the lenses 200 are spliced along the first direction Y and some of the lenses 200 are spliced along the second direction Z. The present application does not limit this.

[0090] Since each lens 200 is a designed identical standard part, through the splicing method, a modeling light-emitting surface with an arbitrary opening shape can be formed. Then, by matching the light flux of the corresponding light source 100, it can not only meet different modeling requirements but also reduce the design time and cost of the signal lamp. For example, in a certain vehicle model, according to the modeling requirements, the number of the light sources 100 and the lenses 200 needs to be set to N. Then, the light flux of each light source 100 can be changed to one Nth of the light flux of the light source 100 in the original signal lamp module 10.

[0091] It should be noted that in the present application, each light source 100 and a corresponding lens 200 cooperate to project a preset signal light pattern in the far field. When the number of the lenses 200 and the light sources 100 is multiple, a single lens 200 and the corresponding single light source 100 form a group, and multiple groups all project the same signal light pattern. It can be understood that since the size of a single lens 200 is small, at the millimeter level, while the size of the light pattern in the far field and the far field distance are about several meters, which is much larger than the size of a single lens 200. Therefore, after multiple lenses 200 are spliced, most of the areas of the multiple projected light patterns can overlap, and the superimposed light pattern also meets the requirements of the relevant signal light pattern. The light flux is the product of the single-group light flux 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 can be seen from the foregoing, through the combination of the light source 100 and the lens

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

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

[0096] Such as Figure 1 、 Figure 4 and Figure 5 As shown in, in some embodiments, the preset light pattern is the reverse light pattern, the regular surface is an inwardly concave cylindrical surface, the optical axis L of the lens 200 coincides with the light-emitting 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. Among them, along the first direction Y, the angle between the light rays 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°, and along the second direction Z, the angle between the light rays 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 the reverse light pattern, that is to say, the signal lamp module 10 is a reverse lamp module. Specifically, the regular surface of the light-incident surface 210 is an inwardly concave cylindrical surface, and the cylindrical surface extends in a curve along the first direction Y and extends linearly along the second direction Z. The cylindrical surface can achieve the divergence effect of light rays in the first direction Y, and there is no deflection of light rays in the second direction Z. The coincidence of the optical axis L and the light-emitting center F of the light source 100 can ensure the utilization rate of light rays and improve the luminous flux.

[0098] The optical axis L is in an offset state in the second direction Z. Such a setting can make the far-field light pattern tilt downward and avoid upward glare. Further, the light-emitting surface 220 respectively constrains the emission angles of the emitted light rays in the first direction Y and the second direction Z. In the first direction Y, the angle between the emitted light rays and the optical axis L forms a horizontal constraint angle of ±50°, meeting the "wide-angle illumination" requirement of the reverse lamp; in the second direction Z, the angle between the emitted light rays and the optical axis L forms a vertical constraint angle of ±13°, ensuring that the light rays are concentrated near the ground.

[0099] In this embodiment, through 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, the requirements of horizontal wide coverage and vertical low elevation angle of the reverse light pattern can be achieved. On the one hand, it is beneficial to improve the structural compactness of the reverse light and realize a small-sized opening design. On the other hand, it is beneficial to improve the light efficiency of the reverse light, and the light efficiency exceeds 85%. Moreover, it is also beneficial to reduce the design cycle and production cost of the reverse light.

[0100] It should be noted that in this embodiment, taking the reverse light module as an example, the light source 100 can be selected as a 0.5W - 1W white LED. As Figure 4 shown, the upper center area of the contour section of the light exit surface 220 along the second direction Z is a convex surface, which transitions downward and then rebounds into a concave surface. The central convex surface is used for the main bright spot area of the light pattern center, and the lower side is used to deflect the light downward. As Figure 4 shown, the contour section of the light exit surface 220 along the first direction Y is not a smooth circular arc surface, but has slight protrusions on both sides of the center to refract the light to both sides.

[0101] Furthermore, as Figure 4 and Figure 5 shown, in some embodiments, the signal light module 10 has a first reference plane S1 and a second reference plane S2. The first reference plane S1 passes through the optical axis L and is parallel to the second direction Z, and the second reference plane S2 passes through the optical axis L and is parallel to the first direction Y. Taking 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, a coordinate system is established, where:

[0102] The first reference plane S1 intersects the light exit surface 220 of the lens 200 to form a first curve A1, and the first curve A1 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 the light exit surface 220 of the lens 200 to form a second curve A2, and the second curve A2 satisfies the following formula:

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

[0106] In this embodiment, a specific design solution for the free-form surface 220 is further proposed when the signal lamp module 10 is a reverse lamp module. The first reference plane S1 passes through the optical axis L and is parallel to the Z-axis (the second direction Z), and the intersection line of the first reference plane S1 and the light-emitting surface 220 is the first curve A1. The first curve A1 determines the angular distribution of the light emitted in the vertical direction (Z-axis). The second reference plane S2 passes through the optical axis L and is parallel to the Y-axis (the first direction Y), and the intersection line of the second reference plane S2 and the light-emitting surface 220 is the second curve A2, which determines the angular distribution of the light emitted in the horizontal direction (Y-axis). It should be noted that in the above formula, 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, and in the second curve A2, z = 0.

[0107] Both the first curve A1 and the second curve A2 are fifth-degree polynomials. Through the above formula, the specific parameters of the contour line of the light-emitting surface 220 after the lens 200 is cut along the first reference plane S1 or the second reference plane S2 can be obtained. Thus, the light-emitting surface 220 can adjust the angular distribution of the light emitted in the first direction Y to within ±50°, and adjust the angular distribution of the light emitted in the second direction Z to within ±13°, meeting the reverse lamp light pattern requirements. In addition, through the independent design of the above two curves, the three-dimensional free-form surface is decomposed into the coordinated control of two two-dimensional curves, and then combined with the deep coupling with the light-incident surface, the full-link control of the light is completed within the millimeter-level lens size, which is also beneficial to reducing the complexity of optical design and mold manufacturing, improving the convenience of manufacturing the lens 200, and reducing the manufacturing cost.

[0108] Such as 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 in sequence. The optical axis L passes 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 in sequence. The optical axis L passes 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°. The angle between the light emitted from the third region 223 and the optical axis L is greater than or equal to -15° and less than or equal to 15°. The angle between the light emitted from the fourth region 224 and the optical axis L is greater than or equal to -35° and less than or equal to -15°. The angle between the light 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 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 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 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] In this embodiment, a specific light control scheme for the free-form surface 220 is further proposed when the signal lamp module 10 is a reverse lamp module. The light-emitting surface 220 realizes millimeter-level precise regulation of the far-field light pattern through the grid design of five regions in the first direction Y and three regions in the second direction Z, combined with differential angle constraints.

[0110] Along the first direction Y, the free-form surface is divided into five regions. The third region 223 is the middle region through which the optical axis L passes, which can control the light to cover an angular range of ±15° in the first direction Y and provide central brightness. The second region 222 and the fourth region 224 are distributed on both sides of the third region 223 along the first direction Y, covering angular ranges of 15° to 35° and -35° to -15° respectively. The first region 221 and the fifth region 225 are located at the two side edge regions along the first direction Y, covering angular ranges of 35° to 50° and -50° to -35° respectively. Thus, it can ensure that the reverse lamp light pattern provides a wide viewing angle in the first direction Y and ensure the central illumination brightness and illumination range.

[0111] Along the second direction Z, it is divided into three regions. The seventh region 227 is the middle region through which the optical axis L passes. It can control the light to cover an angular range of ±8° in the second direction Z, providing central brightness. The sixth region 226 and the eighth region 228 are arranged on both side edges of the seventh region 227 along the second direction Z, covering angular ranges of 8° to 13° and -13° to -8° respectively. Thus, it can ensure that the reverse light pattern provides a narrow viewing angle in the second direction Z, ensuring central illumination brightness and ground illumination.

[0112] Through the above grid partition design, the light pattern of the reverse light module can be realized. In this way, on the one hand, since the overall free-form surface mold requires ultra-precise polishing, which is costly and has a low yield, this design decomposes the free-form surface of the light-emitting surface 220 into multiple sub-regions, and each sub-region can be independently processed, which is beneficial to reducing costs and improving the yield. On the other hand, each partition of the light-emitting surface 220 independently optimizes the light angle, which can improve the problems of light spots or hot spots in the related art, ensure smooth transition of light, and form a uniform light pattern without dark areas. On the third hand, the partition angle control can reduce the scattering of light, and almost all the light emitted by the light source 100 is utilized. Only a lower-power LED is required to achieve high brightness, which is beneficial to further improving the light efficiency.

[0113] It can be understood that in the reverse light module of this embodiment, the light-emitting surface 220 is divided into five regions in the first direction Y and three regions in the second direction Z. There can be various bases for the boundaries of the above region divisions. Hereinafter, the present application will elaborate on one of the bases for the boundaries of the division.

[0114] As mentioned above, please refer to Figure 4 、 Figure 5 and Figures 8 to 10 , the signal light module 10 has a first reference plane S1 and a second reference plane S2. The first reference plane S1 passes through the optical axis L and is parallel to the second direction Z, and the second reference plane S2 passes through the optical axis L and is parallel to the first direction Y. Further, in the signal light module 10, a first reference axis M1 and a second reference axis M2 are defined. Both the first reference axis M1 and the second reference axis M2 pass through the light-emitting 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 describes 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 in the figure, when observing along the second direction Z, there is an angle α1 between the connecting line L1 of the light-emitting center F and the first side 201 and the optical axis L; there is an angle α2 between the connecting line L2 of the light-emitting center F and the second side 202 and the optical axis L. Then, the first reference plane S1 is rotated around the first reference axis M1 towards the direction close to the first side 201. After rotating each first angle β1, the first reference plane S1 intersects with the light-emitting surface 220 to successively form the third curve A3 and the fourth curve A4. After that, the first reference plane S1 is rotated around the first reference axis M1 towards the direction close to the second side 202. After rotating each second angle β2, the first reference plane S1 intersects with the light-emitting surface 220 to successively form the fifth curve A5 and the sixth curve A6. At this time, the area between the third curve A3 and the fifth curve A5 is the third area 223, the area between the third curve A3 and the fourth curve A4 is the second area 222, the area between the fourth curve A4 and the first side 201 is the first area 221, the area between the fifth curve A5 and the sixth curve A6 is the fourth area 224, and the area between the sixth curve A6 and the second side 202 is the fifth area 225. Among them, since the side of the first reference plane M1 close to the first side 201 is divided into three areas, the value of the first angle β1 is greater than or equal to α1 / 3 and less than α1 / 2. Similarly, the value of the second angle β2 is greater than or equal to α2 / 3 and less than α2 / 2. Optionally, α1 can be equal to α2, and the first angle β1 can be equal to the second angle β2.

[0116] The following describes the specific process of dividing the light-emitting surface 220 into three areas in the second direction Z: As Figure 8 and Figure 9 shown, first, when observing along the first direction Y, there is an angle α3 between the connecting line L3 of the light-emitting center F and the third side 203 and the optical axis L; there is an angle α4 between the connecting line L4 of the light-emitting center F and the fourth side 204 and the optical axis L. Then, the second reference plane S2 is rotated around the second reference axis M2 towards the direction close to the third side 203. After rotating the third angle β3, the second reference plane S2 intersects with the light-emitting surface 220 to form the seventh curve A7. After that, the second reference plane S2 is rotated around the second reference axis M2 towards the direction close to the fourth side 204. After rotating the fourth angle β4, the second reference plane S2 intersects with the light-emitting surface 220 to form the eighth curve A8. At this time, the area between the seventh curve A7 and the eighth curve A8 is the seventh area 227, the area between the seventh curve A7 and the third side 203 is the sixth area 226, and the area between the eighth curve A8 and the fourth side 204 is the eighth area 228. Among them, since the side of the second reference plane M2 close to the third side 203 is divided into two areas, the value of the third angle β3 is greater than or equal to α3 / 2 and less than α3. Similarly, the value of the fourth angle β4 is greater than or equal to α4 / 2 and less than α4. Since the optical axis L is in an offset state in the second direction Z, therefore, α3 is less than α4.

[0117] Thus, the mesh region division of the above freeform surface is realized, and the precise control of light is achieved.

[0118] In addition, it can be 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. In this way, the freeform surface can be divided into a total of fifteen micro-regions. As Figure 8 shown, the fifteen micro-regions are numbered 1, 2, 3, 4... respectively with the first direction Y as the row and the second direction Z as the column. As shown in Table 1 below, the exit angle ranges of the light modulation in each of the fifteen micro-regions are respectively shown.

[0119] Table 1 Exit Angle Ranges of the Exit Light in Different Regions

[0120] Region number First direction Y: Emission angle range Second direction Z: Emission angle range 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 , which is the reverse light pattern schematic diagram of the signal lamp module 10 of the embodiment of the present application designed according to the above design. From Figure 11 it can be seen that the reverse 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 offset downward along the second direction Z to ensure that most of the light shines on the ground and reduce glare.

[0122] As Figures 12 to 15 shown, in some embodiments, the preset light pattern is a fog lamp light pattern, the regular surface is a convex arc surface, the optical axis L of the lens 200 coincides with the light emitting center F of the light source 100, and along the second direction Z, the connection line between the midpoint of the light exit surface 220 and the midpoint of the light incident surface 210 coincides with the optical axis L. Among them, along the first direction Y, the angle between the light emitted from the light exit surface 220 and the optical axis L is greater than or equal to -13° and less than or equal to 13°, and along the second direction Z, the angle between the light emitted from the light exit 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 lamp light pattern, that is to say, the signal lamp module 10 is a fog lamp module. It can be understood that it can be a front fog lamp module or a rear fog lamp module. Specifically, the regular surface of the light incident surface 210 is a convex arc surface. The arc surface extends in a curve along the first direction Y and extends in a curve along the second direction Z. That is to say, the regular surface of the light incident surface 210 has bi-curvature, which can achieve the convergence effect of light in both the first direction Y and the second direction Z, thereby reducing the light scattering loss. Combining with the coincidence design of the optical axis L and the light emitting center F, the light can be efficiently introduced into the interior of the lens 200 and the luminous flux is increased.

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

[0125] In this embodiment, through the special design of the light-incident surface 210 with a convex arc surface and the light-emitting surface 220 with a free-form surface, the design of the fog lamp light pattern can be achieved. The narrow-angle combination of ±13° horizontally and ±8° vertically forms an approximately rectangular concentrated light beam, which is beneficial to improving the penetration rate of the fog lamp light and reducing scattering. On the one hand, it is beneficial to improve the structural compactness of the fog lamp and achieve a small-sized opening design. On the other hand, it is beneficial to improve the light efficiency of the fog lamp, and the light efficiency exceeds 70%. Moreover, it is also beneficial to reduce the design cycle and production cost of the fog lamp.

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

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

[0128] Taking 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, a coordinate system is established, where:

[0129] The first reference plane S1 intersects with the light-emitting surface 220 of the lens 200 to form a ninth curve A9, and the ninth curve A9 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 surface S2 intersects the light-emitting surface 220 of the lens 200 to form a tenth curve A10. The tenth curve A10 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 free-form 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 (the second direction Z). The intersection line with the light-emitting surface 220 is the ninth curve A9, which determines the distribution of the emission angles of the 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 (the first direction Y). The intersection line with the light-emitting surface 220 is the tenth curve A10, which determines the distribution of the emission angles of the light in the horizontal direction (Y axis). It should be noted that in the above formula, 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] The ninth curve A9 and the tenth curve A10 are both fifth-order polynomials. Through the above formula, the specific parameters of the contour line of the light-emitting surface 220 of the lens 200 after being cut along the first reference surface S1 or the second reference surface S2 can be obtained. As a result, the light-emitting surface 220 can adjust the light emission angle to within ±13° in the first direction Y, and adjust the light emission angle to within ±8° in the second direction Z, meeting the fog light type requirements. In addition, through the independent design of the above two curves, the three-dimensional free-form surface is decomposed into two two-dimensional curves for coordinated control, and then combined with the deep coupling with the light incident surface 210, the full-link control of light is completed within the millimeter-level lens size, which is also conducive to reducing the complexity of optical design and mold manufacturing, improving the convenience of lens 200 production, and reducing production 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. The optical axis L passes 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. The optical axis L passes through the eighth region 228. Along the first direction Y, the angle between the light rays 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 rays 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 rays 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 rays 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°. The angle between the light rays 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°. 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 5° and less than or equal to 8°. The angle between the light rays emitted from the seventh region 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 rays emitted from the eighth region 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 rays emitted from the ninth region 229 and the optical axis L is greater than or equal to -6° and less than or equal to -2°. The angle between the light rays emitted from the tenth region 230 and the optical axis L is greater than or equal to -8° and less than or equal to -5°.

[0136] In this embodiment, a specific light ray control scheme for the free-form surface 220 is further proposed when the signal lamp module 10 is a fog lamp module. The light-emitting surface 220 realizes millimeter-level precise regulation of the far-field light pattern through the grid design of five regions in the first direction Y and five regions in the second direction Z, combined with differential angle constraints.

[0137] Along the first direction Y, it is divided into five regions. The third region 223 is the middle region through which the optical axis L passes, which can control the light rays to cover an angular range of ±5° in the first direction Y and provide central brightness. The second region 222 and the fourth region 224 are distributed on both sides of the third region 223 along the first direction Y, covering angular ranges of 4.5° to 9° and -9° to -4.5° respectively, to achieve smooth transition of the light rays. The first region 221 and the fifth region 225 are located at the two side edge regions along the first direction Y, covering angular ranges of 9° to 13° and -13° to -9° respectively, to achieve wide-width supplementary lighting at the left and right edges.

[0138] Along the second direction Z, it is also divided into five regions. The eighth region 228 is the middle region through which the optical axis L passes. It can control the light to cover an angular range of ±3° in the second direction Z, providing central brightness. The seventh region 227 and the ninth region 229 are distributed on both sides of the eighth region 228 along the second direction Z, covering angular ranges of 2° to 6° and -6° to -2° respectively, realizing smooth transition of light. The sixth region 226 and the tenth region 230 are located at the two side edge regions along the second direction Z respectively, covering angular ranges of 5° to 8° and -8° to -5° respectively, ensuring the vertical emission range of light, reducing upward reflected glare in foggy weather, and improving visibility.

[0139] Through the above grid partition design, the light pattern of the fog lamp module can be realized. Thus, on the one hand, since the overall free-form surface mold requires ultra-precise polishing, which is costly and has a low yield, this design decomposes the free-form surface of the light-emitting surface 220 into multiple sub-regions, and each sub-region can be independently processed, which is conducive to reducing costs and increasing the yield. On the other hand, each partition of the light-emitting surface 220 independently optimizes the light angle, which can improve the problems of light spots or hot spots in the related art, ensure smooth transition of light, and form a uniform light pattern without dark areas. And in this embodiment, in the first direction Y or the second direction Z, there is an overlap between the light distribution angles of some adjacent two partitions, so that the light can achieve natural transition, which is conducive to further eliminating the dark areas of the light pattern and improving the far-field uniformity. On the third hand, the partition angle control can reduce the scattering of light, and almost all the light emitted by the light source 100 is utilized, and only a low-power LED is required to achieve high brightness, which is conducive to further improving the light efficiency.

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

[0141] In addition, in this embodiment, the free-form surface is divided into five regions along the first direction Y and five regions along the second direction Z. In this way, the free-form surface can be divided into a total of twenty-five tiny regions. As Figure 18 shown, the twenty-five tiny regions are numbered 1, 2, 3, 4... 25 respectively with the first direction Y as the row and the second direction Z as the column. As shown in Table 2 below, the emission angle ranges of the light modulation of each region in the twenty-five tiny regions are respectively shown.

[0142] Table 2 Emission angle ranges of the emitted light in different regions of the fog lamp module

[0143] Region number First direction Y: Emission angle range Second direction Z: Emission angle range 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 , which is the schematic diagram of the fog light pattern of the signal lamp module 10 of the embodiment of the present application after the above design. As can be seen from Figure 19 , the fog light pattern can meet the design requirements of uniform illumination, narrow beam, and high penetration.

[0145] The present application describes the specific design scheme when the signal lamp module 10 projects a reverse light pattern or a fog light pattern. It can be understood that by cooperatively designing the light-emitting surface 220 of the free-form surface and the light-incident surface 210 of the regular surface, more types of light patterns can be realized, such as a turn light pattern, a brake light pattern, etc. Therefore, the signal lamp module 10 adopting this optical scheme is not limited to being a reverse lamp module or a fog lamp module, but can also be other types of signal lamps, and the present application does not limit this.

[0146] In addition, the number of regions divided by the mesh of the free-form surface can be flexibly set according to the actual situation. 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 form the light distribution angle range of the preset light pattern along the first direction Y, and along the second direction Z, the light rays emitted from each second light-emitting region together form the light distribution angle range of the preset light pattern along the second direction Z.

[0147] As Figure 20 shown, in some embodiments, the signal lamp module 10 further includes a lamp housing 400. The lens 200 can be directly connected to the opening of the lamp housing 400, and the circuit board 300 and the light source 100 are both arranged in the accommodation cavity formed by the lamp housing 400 and the lens 200. In this way, the installation and fixation of the circuit board 300 and the light source 100 can be realized, so as to project the required 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 lamp module 10 further includes a lamp cover (not shown in the figure). The lamp cover can cover the outside of the lens 200 and be connected to the lamp housing 400. The lamp cover only plays a protective role and does not modulate the light.

[0149] In the second aspect, an embodiment of the present application provides a vehicle lamp, including the signal lamp module 10 described in the first aspect. In this way, it is beneficial to improve the light-emitting efficiency of the vehicle lamp, and at the same time, the small opening size design of the vehicle lamp can be realized, which is further beneficial to improving the aesthetics of the vehicle and reducing the energy consumption of the vehicle.

[0150] The above content is only a specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A signal lamp module, characterized in that, include: a light source, the light source being configured to emit light; a lens, the lens comprising a light incident surface and a light emitting surface, the light incident surface of the lens being opposite to the light source, and the light emitting surface being located on a side of the light source facing away from the light incident surface; Among them, the light incident surface is a regular curved surface, and the light emitting surface is a free curved surface. The light emitted by the light source is incident into the lens through the regular curved surface, and the free curved surface projects a preset light pattern in the far field. The preset light pattern includes a reversing light pattern or a fog light pattern.

2. The signal lamp module according to claim 1, characterized in that, There are multiple lenses and multiple light sources, and the lenses and the light sources correspond one to one. Two adjacent lenses are spliced along the first direction or the 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 signal lamp module according to claim 1, wherein 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 signal lamp module according to claim 1, wherein 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 emission center of the light source, and along the second direction, a 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 signal lamp 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 the light-emitting surface to form a first curve, and the first curve 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 the light-emitting surface to form a second curve, and the second curve satisfies the following formula: y = 10.25 - 21.5x + 15.3x 2 - 3.8x 3 + 0.25x 4 - 0.022x 5 。 6. The signal lamp module according to claim 4, wherein Along the first direction, the light emitting surface includes a first area, a second area, a third area, a fourth area, and a fifth area arranged in sequence, and the optical axis passes through the third area. Along the second direction, the light emitting surface includes a sixth area, a seventh area, and an eighth area arranged in sequence, and the optical axis passes through the seventh area. Along the first direction, the angle between the light emitted from the first area and the optical axis is greater than or equal to 35° and less than or equal to 50°, the angle between the light emitted from the second area and the optical axis is greater than or equal to 15° and less than or equal to 35°, the angle between the light emitted from the third area and the optical axis is greater than or equal to -15° and less than or equal to 15°, the angle between the light emitted from the fourth area and the optical axis is greater than or equal to -35° and less than or equal to -15°, and the angle between the light emitted from the fifth area 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 ray 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 ray 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 ray 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 signal lamp module according to claim 1, wherein, The preset light pattern is a fog lamp light pattern; The regular curved surface is a convex arc surface, the optical axis of the lens coincides with the light emitting 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; Among them, along the first direction, the angle between the light ray 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 ray emitted from the light emitting surface and the optical axis is greater than or equal to -8° and less than or equal to 8°. The first direction is the width direction of the lens, and the second direction is the height direction of the lens.

8. The signal lamp module according to claim 7, wherein The signal lamp 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; Taking 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, a coordinate system is established, where: The first reference surface intersects with the light emitting surface to form a ninth curve, and the ninth curve 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, and the tenth curve satisfies the following formula: y = 4732.85 - 4093.85x + 1387.03x 2 - 228.94x 3 + 16.25x 4 - 0.4022x 5 。 9. The signal lamp module according to claim 7, wherein, 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. 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. The optical axis passes through the eighth region; Along the first direction, the angle between the light ray 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 ray 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 ray 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 ray 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 ray 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 ray 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 ray 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 ray 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 ray 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 ray 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 lamp, characterized in that, Comprising the signal lamp module according to any one of claims 1-9.

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