Car lamp module and car lamp
By using light guides in the headlight module and using total reflection and continuous curvature light-out surface technology, the problem of difficult and high cost due to excessive length of the light guide is solved, and higher production yield and lower production costs are achieved, while improving optical efficiency and lighting effects.
Patent Information
- Application Number
- CN202510357533.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-06-06
AI Technical Summary
In existing headlight modules, the length of the light guide is too long, which leads to high processing difficulty and high cost.
A light guide is adopted, wherein the light guide includes a light guide substrate and a light guide portion. By using total reflection in the first direction, the light ray is constrained into parallel light, and refracted through the light exit surface of continuous curvature in the second direction to form an emitted light with a preset divergence angle.
It reduces the processing difficulty and assembly difficulty of light guides, improves the production yield of the headlight module, and reduces the production cost by using low-cost materials, while improving optical efficiency and lighting effects.
Smart Images
Figure CN120101066A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle lamps, and in particular to a vehicle lamp module and a vehicle lamp. Background Art
[0002] With the development of smart car technology, car lighting is becoming more and more intelligent, and the adaptive high beam system (Advanced Driving Beam, ADB) that can adapt to different scenarios has gradually become a standard feature of smart cars.
[0003] In the related technology, the ADB module is composed of a light source, a collimator and an external lens. The collimator includes multiple light guides. The light from the light source is collimated in the horizontal and vertical directions through the total reflection of the light guides, and then emitted to the external lens, and then projected by the external lens to form a high beam light pattern.
[0004] However, in the above scheme, the light source is collimated in two directions through the total reflection of the light guide. In order to ensure the total reflection efficiency and the quality of the collimated light, the length of the light guide needs to be set longer, usually more than 7 mm, making the light guide slender, which makes the processing of the light guide more difficult and the processing cost higher. Summary of the invention
[0005] The embodiments of the present application provide a vehicle lamp module and a vehicle lamp, aiming to improve the problems of greater processing difficulty and higher cost caused by the excessive length of the light guide.
[0006] In a first aspect, an embodiment of the present application proposes a vehicle lamp module. The vehicle lamp module includes: a light source, including a plurality of light-emitting units arranged along a first direction, the light-emitting units being used to emit visible light; a light guide, including a light-guiding substrate and a plurality of light-guiding portions provided on a side of the light-guiding substrate close to the light source, the light-guiding portions including a first light incident surface and a first total reflection surface and a second total reflection surface provided on opposite sides of the first light incident surface along the first direction, each of the first light incident surfaces being arranged opposite to a light-emitting surface of a light-emitting unit, the light-guiding substrate including a first light-emitting surface extending linearly along the first direction, the first light-emitting surface being a free-form surface having a continuous curvature; the first A light incident surface is used to refract the visible light into the light guide, the first total reflection surface and the second total reflection surface are convex curved surfaces, the first total reflection surface and the second total reflection surface are used to collimate the visible light into parallel light along the first direction and emit it through the first light exiting surface, the first light exiting surface is configured to refract the visible light along the second direction into output light with a preset divergence angle, and the second direction is perpendicular to the first direction; and an outer lens is arranged on the side of the light guide away from the light source, the outer lens is configured to receive the output light of the first light exiting surface and project it to form a high beam light pattern.
[0007] In the vehicle light module of the present application, a light guide is used to adjust the visible light of the light source, and the light guide includes a light guide base and a light guide portion. In the first direction, the light guide portion of the light guide constrains the visible light into parallel light through total reflection; in the second direction, the light guide base constrains the visible light into outgoing light with a preset divergence angle through the refraction of the first light emitting surface with continuous curvature. Compared with the method in the related art that the light guide uses total reflection to converge light in both directions, the length of the light guide portion can be reduced, so that the light guide portion becomes a short-sized light guide. In this way, on the first hand, the processing difficulty and assembly difficulty of the light guide can be reduced, which is beneficial to improving the manufacturing yield of the vehicle light module. On the second hand, the material requirements of the light guide portion and the light guide base are reduced, and they can be made of low-cost plastic transparent materials, which is also beneficial to reducing the manufacturing cost of the vehicle light module.
[0008] In some embodiments, along the second direction, the optical axis of the outer lens coincides with the light emitting center of the light emitting unit, wherein:
[0009] The divergence angle of the first refracted light beam after the visible light is refracted by the first light incident surface is greater than or equal to -41° and less than or equal to 41°;
[0010] Along the second direction, a divergence angle of a second refracted light beam after the first refracted light beam is refracted by the first light-emitting surface is greater than or equal to -22° and less than or equal to 7.5°.
[0011] Such a configuration, on the one hand, is conducive to improving the optical efficiency of the light guide and reducing light loss. On the other hand, it allows the light to be concentrated in the area that needs to be illuminated, reducing the light scattered in unnecessary directions, thereby helping to improve the optical efficiency of the headlight module and the reliability and lighting effect of the headlight module. Furthermore, the upward divergence angle is smaller than the downward divergence angle, which can also improve the direct light to the driver of the oncoming vehicle and reduce the generation of glare, thereby also helping to improve driving safety.
[0012] In some embodiments, along the second direction, in the process that the deflection angle between the light in the first refracted light beam and the optical axis gradually increases from -8° to 41°, the deflection angle between the light in the second refracted light beam and the optical axis gradually increases from -8° to +7.5°;
[0013] In the process that the deflection angle between the light in the first refracted light beam and the optical axis gradually decreases from -8° to -41°, the deflection angle between the light in the second refracted light beam and the optical axis gradually decreases from -8° to -22°.
[0014] Based on the above light distribution, the curvature distribution of the first light emitting surface in the second direction can be designed, which is beneficial to achieve a curved surface design of the first light emitting surface while improving the optical efficiency of the light module as well as the reliability and lighting effect of the light module, thereby helping to improve the convenience and reliability of the design of the first light emitting surface.
[0015] In some embodiments, the visible light includes a first light ray and a second light ray, wherein:
[0016] Along the second direction, the angle between the first light and the optical axis is 0°, and the angle between the first light and the optical axis after being emitted through the first light-emitting surface is -6.4°;
[0017] The angle between the first refracted light ray after the second light ray is refracted through the first light incident surface and the optical axis is 18°, and the angle between the second refracted light ray after the first refracted light ray is refracted through the first light exiting surface and the optical axis is 0°.
[0018] Based on the first light and the second light, the light distribution of the emergent light from the first light emitting surface can be further enriched, thereby facilitating further improving the convenience and reliability of the design of the first light emitting surface.
[0019] In some embodiments, the light guide substrate further includes a first side surface and a second side surface provided on opposite sides of the first light emitting surface along the first direction, and the first side surface and the second side surface are provided with a leather grain structure, thereby reducing stray light and facilitating improving lighting effects.
[0020] In some embodiments, the light guide substrate further includes a first plane opposite to the first light emitting surface, the light guide portion is disposed on the first plane, the first plane has a first region that does not overlap with the light guide portion, and the first region is provided with a dermatoglyphic structure, thereby reducing stray light and facilitating improved lighting effects.
[0021] In some embodiments, the outer lens includes a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall and the second side wall are arranged on two opposite sides of the outer lens along the first direction, the third side wall and the fourth side wall are arranged on two opposite sides of the outer lens along the second direction, and the first side wall, the second side wall, the third side wall and the fourth side wall are provided with a leather grain structure, thereby reducing stray light and facilitating improving the lighting effect.
[0022] In some embodiments, the light-guiding substrate further includes a first plane opposite to the first light-emitting surface, the light-guiding portion is disposed on the first plane, and the focus of the outer lens is located in the first plane.
[0023] Such an arrangement enables all the light emitted from the first light emitting surface to be adjusted by the outer lens to form a preset high beam light pattern. On the one hand, it is beneficial to improve the utilization rate of light, thereby reducing the power consumption of the headlight module and improving the lighting effect. On the other hand, the shape of the light spot projected by the outer lens is determined by the light emitted from the first light emitting surface extending in the reverse direction to the virtual image on the first plane, which is also beneficial to improve the accuracy of the shape of the light spot emitted by the outer lens and the uniformity of illumination. In addition, the first plane of the light guide substrate is directly used as the focal plane of the outer lens, which can save the additional focusing structure, which is also beneficial to improve the assembly accuracy and reduce the assembly volume.
[0024] In some embodiments, the distance between the light emitting surface of the light emitting unit and the first light incident surface is greater than 0.5 mm. This arrangement can prevent the heat of the light emitting unit from being directly transferred to the light guide and causing the light guide to melt or deform, thereby improving the heat dissipation performance and reliability of the vehicle lamp module.
[0025] In some embodiments, the length of the light guide portion along the axial direction of the optical axis of the outer lens is less than or equal to 3 mm. This is conducive to reducing the processing difficulty of the light guide component, reducing costs, and improving yield.
[0026] In some embodiments, the outer lens includes a second light incident surface and a second light emitting surface, the second light incident surface is located between the second light emitting surface and the first light emitting surface, and along the second direction, a line connecting the midpoint of the second light incident surface and the midpoint of the second light emitting surface does not coincide with the optical axis of the outer lens.
[0027] In this embodiment, the optical axis of the outer lens is set to a deviated state. On the one hand, the initial deviation of the light beam emitted from the first light emitting surface can be compensated by asymmetric refraction, so that the light emitted from the first light emitting surface is incident on the outer lens as much as possible, reducing the problem of edge light leakage, thereby facilitating the improvement of light utilization. On the other hand, the light beam emitted from the first light emitting surface can be further precisely controlled in the second direction, thereby also facilitating the improvement of the uniformity of the light intensity distribution of the high beam light type.
[0028] In some embodiments, the second light incident surface is a plane, the second light emitting surface is a convex curved surface, and the light emitting surface of the light emitting unit, the first light incident surface, and the second light incident surface are parallel to each other. In this way, only the curved surface of the second light emitting surface can be designed, which is conducive to reducing the processing difficulty of the outer lens and improving the design convenience.
[0029] In some embodiments, the second light incident surface and the second light emitting surface are both convex curved surfaces. With such an arrangement, the light emitted from the first light emitting surface can be precisely controlled by designing the second light incident surface and the second light emitting surface, thereby facilitating improving the lighting effect of the high beam light type projected by the outer lens.
[0030] In the second aspect, the embodiment of the present application proposes a vehicle lamp, comprising the vehicle lamp module described in the first aspect. With such a configuration, the length of the light guide portion can be reduced, so that the light guide portion becomes a short-sized light guide. In this way, firstly, the processing difficulty and assembly difficulty of the light guide can be reduced, which is conducive to improving the manufacturing yield of the vehicle lamp. Secondly, the material requirements of the light guide portion and the light guide substrate are reduced, and they can be made of low-cost plastic transparent materials, which is also conducive to reducing the manufacturing cost of the vehicle lamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 A schematic diagram of the structure of a vehicle light module provided in one embodiment of the present application;
[0032] Figure 2 A schematic structural diagram of a vehicle light module provided by an embodiment of the present application from another perspective;
[0033] Figure 3 A structural schematic diagram of a vehicle light module provided in an embodiment of the present application from another perspective;
[0034] Figure 4 A schematic diagram of the structure of a light source and a light guide member provided in one embodiment of the present application;
[0035] Figure 5 A schematic structural diagram of a light source and a light guide member provided in one embodiment of the present application from another perspective;
[0036] Figure 6 A schematic diagram of light distribution emitted by a light guide member provided in an embodiment of the present application;
[0037] Figure 7 A schematic diagram of a high beam light pattern when a single light-emitting unit in a vehicle lamp module provided by an embodiment of the present application is lit;
[0038] Figure 8 A schematic diagram of a high beam light pattern when all light-emitting units in a vehicle lamp module provided by an embodiment of the present application are lit;
[0039] Fig. 9 This is a schematic diagram of the high beam light pattern after turning off the two middle light-emitting units in the vehicle lamp module provided in an embodiment of the present application.
[0040] The description of the reference numerals in the figures is as follows:
[0041] 10. Car light module;
[0042] L, optical axis, X, first direction, Z, second direction;
[0043] 100. light source, 110. light emitting unit;
[0044] 200, light guide member, 210, light guide substrate, 211, first light emitting surface, 212, first side surface, 213, second side surface, 214, first plane, 2141, first region;
[0045] 220, light guide portion, 221, first light incident surface, 222, first total reflection surface, 223, second total reflection surface;
[0046] M1, first refracted light beam, M2, second refracted light beam;
[0047] 300, outer lens, 310, first side wall, 320, second side wall, 330, third side wall, 340, fourth side wall, 350, second light incident surface, 360, second light exit surface. DETAILED DESCRIPTION
[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with 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.
[0049] In the description of the present application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying 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 the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0051] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0052] As described in the background technology, in the ADB module of the related art, the light source is collimated in both directions by total reflection of the light guide, and the light guide needs to meet the reflection path length in two dimensions. In order to ensure the total reflection efficiency and the quality of the collimated light, the length of the light guide is relatively long, usually more than 7mm, so that the light guide is slender.
[0053] When the light guide is slender, the processing and assembly difficulties are greater, resulting in the inability to guarantee the processing yield. At the same time, the slender light guide has higher material requirements, generally requiring more expensive silicone materials, and the mold opening fee of silicone materials is also high, resulting in higher production costs.
[0054] Based on the above problems, the embodiments of the present application propose a vehicle lamp module and a vehicle lamp, aiming to improve the problems of high processing difficulty and high processing cost of the vehicle lamp module.
[0055] In a first aspect, the present application provides a vehicle lamp module 10. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the vehicle lamp module 10 includes a light source 100, a light guide 200 and an outer lens 300. The light source 100 includes a plurality of light-emitting units 110 arranged along a first direction X, and the light-emitting units 110 are used to emit visible light. The light guide 200 includes a light guide substrate 210 and a plurality of light guide portions 220 disposed on a side of the light guide substrate 210 close to the light source 100. The light guide portion 220 includes a first light incident surface 221 and a first total reflection surface 222 and a second total reflection surface 223 disposed on opposite sides of the first light incident surface 221 along the first direction X. Each first light incident surface 221 is disposed opposite to a light-emitting surface of a light-emitting unit 110. The light guide substrate 210 includes a first light emitting surface 211 extending linearly along the first direction X, and the first light emitting surface 211 is a free-form surface with a continuous curvature. The first light incident surface 221 is used to refract the visible light into the light guide 200, the first total reflection surface 222 and the second total reflection surface 223 are used to collimate the visible light into parallel light along the first direction X and emit it through the first light exit surface 211, and the first light exit surface 211 is configured to refract the visible light into an exit light with a preset divergence angle along the second direction Z, and the second direction Z is perpendicular to the first direction X. The outer lens 300 is disposed on a side of the light guide 200 away from the light source 100, and the outer lens 300 is configured to receive the exit light of the first light exit surface 211 and project it into a high beam light type.
[0056] The light source 100 includes a plurality of light emitting units 110, and the light emitting units 110 may be, for example, LED (Light Emitting Diode) chips. The plurality of light emitting units 110 are arranged in a single row along the first direction X, thereby forming a linear light source. It is understood that the control unit may control the opening and closing of each light emitting unit 110 individually, thereby realizing the dynamic light type switching of the ADB. For example, when meeting a vehicle, one or more light emitting units 110 may be turned off, so that the corresponding area in the high beam light type forms a dark area to avoid glare.
[0057] The light guide 200 is used to perform a first adjustment on the visible light of the light source 100. Specifically, Figure 2 and Figure 4 As shown, the light guide 200 includes a light guide base 210 and a light guide portion 220. The light guide portion 220 includes a first light incident surface 221, a first total reflection surface 222, and a second total reflection surface 223. The first light incident surface 221 can refract all visible light from the light source 100 into the light guide 200. The refraction angle depends on the refractive index of the material of the light guide 200. Figure 5 As shown, the light beam after the visible light enters the light guide member 200 is referred to as the first refracted light beam M1.
[0058] The light guide substrate 210 and the light guide portion 220 can realize the decoupling control of the light pattern of the first refracted light beam in the first direction X and the second direction Z. Figure 3 As shown, in the first direction X, the first total reflection surface 222 and the second total reflection surface 223 of the light guide portion 220 can totally reflect the first refracted light beam M1, and constrain the first refracted light beam M1 to be parallel light in the first direction X. Since the first light emitting surface 211 of the light guide substrate 210 extends linearly along the first direction X, the first light emitting surface 211 can be regarded as a cylinder, and the first light emitting surface 211 has no convergence or divergence effect on the parallel light in the first direction X, and the parallel light in the first direction X can be directly emitted through the first light emitting surface 211.
[0059] It should be noted that parallel light refers to a light beam that maintains a consistent direction, does not diverge or converge during propagation after total reflection, and has a divergence angle of 0°. However, in practice, it may not be possible to achieve complete parallelism due to installation errors, processing errors, etc. Therefore, light beams with extremely small divergence angles, such as light beams with divergence angles less than or equal to 5°, 4°, 3°, 2°, 1°, etc., can be approximately regarded as parallel light. The smaller the divergence angle, the better the light type control of the first refracted light beam M1 by the first total reflection surface 222 and the second total reflection surface 223 in the first direction X, but the higher the processing accuracy requirement. Optionally, the first total reflection surface 222 and the second total reflection surface 223 can be symmetrically arranged convex curved surfaces, so as to improve processing convenience while realizing the collimation control of the first refracted light beam M1 in the first direction X.
[0060] Furthermore, the first light-emitting surface 211 is a free-form surface with continuous curvature, and is a cylindrical surface in the first direction X. A free-form surface with continuous curvature means that the curvature of the first light-emitting surface 211 in the second direction Z changes continuously, and there are no other rough microstructures such as joint marks, folds, steps, etc. on the surface. Therefore, the first light-emitting surface 211 can only regulate the first refracted light beam M1 in the second direction Z. Figure 1 As shown, in the second direction Z, the first light exit surface 211 refracts the first refracted light beam M1 into an outgoing light with a preset divergence angle through a change in curvature. In this way, after the first refracted light beam M1 is emitted from the first light exit surface 211, it remains collimated in the first direction X, and the divergence angle is controlled in the second direction Z through the free-form surface, thereby converting the linear diffused light of the light source 100 into a light spot of a preset shape, and then incident on the outer lens 300.
[0061] The outer lens 300 is used to perform a second adjustment on the visible light of the light source 100. The outer lens 300 receives the light emitted from the first light emitting surface 211 and converges the light for a second time to form a uniformly distributed high beam pattern, thereby realizing the basic function of the vehicle lamp module 10.
[0062] Based on the above description, it can be known that in the vehicle lamp module 10 of the present application, a light guide 200 is used to adjust the visible light of the light source 100, and the light guide 200 includes a light guide substrate 210 and a light guide portion 220. In the first direction X, the light guide portion 220 of the light guide 200 constrains the visible light to parallel light through total reflection; in the second direction Z, the light guide substrate 210 constrains the visible light to emergent light with a preset divergence angle through the refraction of the first light emitting surface 211 of continuous curvature. Compared with the method in the related art that the light guide uses total reflection to converge light in both directions, the length of the light guide portion 220 can be reduced, so that the light guide portion 220 becomes a short-sized light guide. In this way, on the first aspect, the processing difficulty and assembly difficulty of the light guide 200 can be reduced, which is conducive to improving the manufacturing yield of the vehicle lamp module 10. Secondly, the light guide portion 220 and the light guide substrate 210 have lower material requirements and can be made of relatively low-cost transparent plastic materials such as polymethacrylimide (PMMI), polycarbonate (PC), etc., thereby also helping to reduce the production cost of the vehicle lamp module 10.
[0063] In addition, since the first light emitting surface 211 is a free-form surface with continuous curvature and has no other rough microstructures such as joint marks, folds, steps, etc., the problem of light spot breakage can be avoided, which is also beneficial to improving the uniformity of the emitted light and the lighting effect.
[0064] In some embodiments, Figure 1 As shown, along the second direction Z, the optical axis L of the outer lens 300 coincides with the light emitting center of the light emitting unit 110, wherein, please refer to Figure 5 , the divergence angle of the first refracted light beam M1 after the visible light is refracted through the first light incident surface 221 is greater than or equal to -41° and less than or equal to 41°. That is, the divergent light of the light-emitting unit 110 is refracted into a light cone of ±41° by the first light incident surface 221. Such an arrangement can ensure that as much of the first refracted light beam M1 as possible is totally reflected on the first total reflection surface 222 and the second total reflection surface 223, and is refracted on the first light emitting surface 211, which is beneficial to improving the optical efficiency of the light guide 200 and reducing light loss.
[0065] In some embodiments, Figure 1 , Figure 5 and Figure 6 As shown, along the second direction Z, the divergence angle of the second refracted light beam M2 after the first refracted light beam M1 is refracted by the first light exiting surface 211 is greater than or equal to -22° and less than or equal to 7.5°.
[0066] This embodiment defines the specific range of the divergence angle of the first refracted light beam M1 after being refracted through the first light-emitting surface 211 in the second direction Z. The divergence angle of the second refracted light beam M2 in the second direction Z is set to be greater than or equal to -22° and less than or equal to 7.5°. On the one hand, the downward divergence angle of -22° becomes the light in the upward direction after passing through the outer lens 300, which can take into account long-distance lighting, so that the light can be irradiated to the far area ahead, and enhance the driver's ability to predict the road conditions ahead. The upward divergence angle of 7.5° becomes the light in the downward direction after passing through the outer lens 300, so that the light can better cover the road ahead and provide the driver with a clear road view. As a result, the light can be concentrated in the area that needs to be illuminated, reducing the light scattered in unnecessary directions, which is beneficial to improving the optical efficiency of the lamp module 10 and the reliability and lighting effect of the lamp module 10. On the other hand, the size of the upward divergence angle is smaller than the size of the downward divergence angle, which can also effectively improve the direct light to the eyes of the driver of the oncoming vehicle, reduce the generation of glare, and thus also help improve driving safety.
[0067] It should be noted that, among the positive and negative values of the divergence angle, a positive value represents the angle at which the light in the second direction Z is deflected toward the side away from the ground relative to the optical axis L of the outer lens 300, and a negative value represents the angle at which the light in the second direction Z is deflected toward the side close to the ground relative to the optical axis L of the outer lens 300.
[0068] In addition, the control of the divergence angle of the first refracted light beam M1 in the second direction Z by the first light emitting surface 211 is achieved by designing the continuous curvature of the free-form surface. Specifically, the continuous curvature of the first light emitting surface 211 in the second direction Z can be precisely designed, and optical simulation software such as Zemax, LightTools, etc. can be used for simulation and optimization, so that the first refracted light beam M1 forms a light spot with a preset diffusion angle after being refracted by the first light emitting surface 211 in the second direction Z. For example, the curvature of the free-form surface can be adjusted according to the light rays at different positions and different deviation angles incident on the first light emitting surface 211 in the second direction Z, so as to achieve precise control of the refraction direction of the first refracted light beam M1 by the first light emitting surface 211.
[0069] In some embodiments, Figure 5 As shown, along the second direction Z, in the process that the deflection angle of the light in the first refracted light beam M1 and the optical axis L gradually increases from -8° to 41°, the deflection angle of the light in the second refracted light beam M2 and the optical axis L gradually increases from -8° to +7.5°; in the process that the deflection angle of the light in the first refracted light beam M1 and the optical axis L gradually decreases from -8° to -41°, the deflection angle of the light in the second refracted light beam M2 and the optical axis L gradually decreases from -8° to -22°.
[0070] This embodiment proposes a light control method for the first light emitting surface 211 to the first refracted light beam M1 in the second direction Z. Among them, in the first refracted light beam M1, the light with a deflection angle of -8° with the optical axis L does not refract after passing through the first light emitting surface 211, that is, the straight line where the light with a deflection angle of -8° with the optical axis L is located can be similarly regarded as the "optical axis" of the first light emitting surface 211. When the incident angle of the first refracted light beam M1 to the first light emitting surface 211 changes from -8° to +41°, the exit angle of the second refracted light beam M2 gradually increases from -8° to +7.5°; when the incident angle of the first refracted light beam M1 to the first light emitting surface 211 changes from -8° to -41°, the exit angle of the second refracted light beam M2 changes from -8° to -22°. Based on the above light distribution, the curvature distribution of the first light emitting surface 211 in the second direction Z can be designed, which is beneficial to improving the optical efficiency of the lamp module 10 as well as the reliability and lighting effect of the lamp module 10, while realizing the curved surface design of the first light emitting surface 211, thereby helping to improve the convenience and reliability of the design of the first light emitting surface 211.
[0071] In some embodiments, Figure 5As shown, the visible light includes a first light ray S1 and a second light ray S2, wherein, along the second direction Z, the angle between the first light ray S1 and the optical axis L is 0°, the angle between the first light ray S1 and the optical axis L after being emitted through the first light emitting surface 211 is -6.4°, the angle between the first refracted light ray S21 and the optical axis L after the second light ray S2 is emitted through the first light incident surface 221 is 18°, and the angle between the second refracted light ray S22 and the optical axis L after the first refracted light ray S21 is emitted through the first light emitting surface 211 is 0°.
[0072] This embodiment further defines the light distribution of the two incident light rays of the light source 100 in the second direction Z after passing through the first light incident surface 221 and the first light emitting surface 211. The angle between the first light ray S1 and the optical axis L is 0°, so it does not refract after passing through the first light incident surface 221, but only refracts after passing through the first light emitting surface 211, and the angle between the first light ray S1 and the optical axis L after refraction is -6.4°.
[0073] The second light ray S2 will be refracted into a first refracted light ray S21 after passing through the first light incident surface 221, and the first refracted light ray S21 will be refracted into a second refracted light ray S22 after passing through the first light emitting surface 211, the angle between the first refracted light ray S21 and the optical axis L is 18°, and the angle between the second refracted light ray S22 and the optical axis L is 0°. That is to say, in the second direction Z, the refracted light with an incident angle of 18° to the first light emitting surface 211 will form a light ray parallel to but not colinear with the optical axis L of the outer lens 300 after passing through the first light emitting surface 211.
[0074] Based on the first light S1 and the second light S2 , the light distribution of the light emitted from the first light emitting surface 211 can be further enriched, thereby facilitating further improving the convenience and reliability of the design of the first light emitting surface 211 .
[0075] Optionally, light rays at more positions and angles may be added, and their deflection angles after being emitted from the first light emitting surface 211 may be limited, thereby more finely controlling the curved shape of the first light emitting surface 211 and further improving the convenience and reliability of the design of the first light emitting surface 211.
[0076] For example, Figure 5As shown, the visible light also includes a third light ray S3, a fourth light ray S4 and a fifth light ray S5. Along the second direction Z, the angle between the third refracted light ray S31 after the third light ray S3 is emitted through the first light incident surface 221 and the optical axis L is 41°, and the angle between the fourth refracted light ray S32 after the third refracted light ray S31 is emitted through the first light exiting surface 211 and the optical axis L is +7.5°. Along the second direction Z, the angle between the fifth refracted light ray S41 after the fourth light ray S4 is emitted through the first light incident surface 221 and the optical axis L is -18°, and the angle between the sixth refracted light ray S42 after the fifth refracted light ray S41 is emitted through the first light exiting surface 211 and the optical axis L is -9°. Along the second direction Z, the angle between the seventh refracted light ray S51 of the fifth light ray S5 after it is emitted through the first light incident surface 221 and the optical axis L is -41°, and the angle between the eighth refracted light ray S52 of the seventh refracted light ray S51 after it is emitted through the first light exiting surface 211 and the optical axis L is -22°. It can be understood that the third light ray S3 and the fourth light ray S4 are two boundary light rays of the light source 100 entering the first light incident surface 221 in the second direction Z.
[0077] In some embodiments, Figure 4 As shown, the first total reflection surface 222 and the second total reflection surface 223 of two adjacent light guides 220 are connected by an arc surface, and the radius of the arc surface is greater than 0.2mm. In this way, it can be ensured that there is a certain gap between the two adjacent light guides 220, which is conducive to ensuring that the transmission light spots of the two adjacent light-emitting units 110 have a suitable overlapping area in the first direction X, which is conducive to improving the illumination of the high beam light type of the vehicle lamp module 10 while ensuring that the irradiation angle range of the high beam light type in the first direction X is appropriate. Optionally, the radius of the arc surface can be 0.3mm, 0.4mm, 0.5mm, etc., and can be flexibly designed according to actual conditions.
[0078] In some embodiments, Figure 2 and Figure 4 As shown, the light guide substrate 210 also includes a first side surface 212 and a second side surface 213 provided on opposite sides of the first light emitting surface 211 along the first direction X, and the first side surface 212 and the second side surface 213 are provided with a leather grain structure. The leather grain structure refers to a surface treatment structure with a micro texture, which usually presents a grain feature similar to that of a leather surface. The leather grain structure can generate diffuse reflection on the light of the light source 100, so that the light originally leaked directly from the first side surface 212 and the second side surface 213 changes direction due to the scattering effect of the leather grain structure, thereby reducing stray light, which is beneficial to improving the lighting effect.
[0079] In some embodiments, Figure 2 and Figure 4As shown, the light guide substrate 210 further includes a first plane 214 opposite to the first light emitting surface 211, the light guide portion 220 is disposed on the first plane 214, the first plane 214 has a first region 2141 that does not overlap with the light guide portion 220, and the first region 2141 is provided with a leather grain structure. Such a configuration can further reduce stray light of the light guide substrate 210, thereby facilitating further improving the lighting effect.
[0080] In some embodiments, Figure 2 As shown, the outer lens 300 includes a first side wall 310, a second side wall 320, a third side wall 330 and a fourth side wall 340. The first side wall 310 and the second side wall 320 are arranged on opposite sides of the outer lens 300 along the first direction X, the third side wall 330 and the fourth side wall 340 are arranged on opposite sides of the outer lens 300 along the second direction Z, and the first side wall 310, the second side wall 320, the third side wall 330 and the fourth side wall 340 are provided with a leather grain structure. Such an arrangement can further reduce the stray light of the outer lens 300, thereby facilitating further improving the lighting effect of the vehicle lamp module 10.
[0081] In some embodiments, Figure 1 As shown, the focus of the outer lens 300 is located in the first plane 214. The high beam light pattern formed by the outer lens 300 in the second direction Z is a virtual image formed by the light emitted from the first light emitting surface 211 extending in the reverse direction to the first plane 214. In this way, in combination with the collimation of the visible light of the light source 100 by the light guide 220 in the first direction X, a high beam light pattern with a long strip of light spot is projected.
[0082] Such an arrangement enables all the light emitted from the first light emitting surface 211 to be adjusted by the outer lens 300 to form a preset high beam light type. On the one hand, it is beneficial to improve the utilization rate of light, thereby reducing the power consumption of the lamp module 10 and improving the lighting effect. On the other hand, the shape of the light spot projected by the outer lens 300 is determined by the virtual image on the first plane 214 that is extended in the reverse direction from the light emitted from the first light emitting surface 211, which is also beneficial to improve the accuracy of the light spot shape and the uniformity of illumination of the outer lens 300 to meet road requirements. In addition, the first plane 214 of the light guide substrate 210 directly serves as the focal plane of the outer lens 300, which can omit an additional focusing structure, which is also beneficial to improve assembly accuracy and reduce assembly volume.
[0083] like Figure 7 , which is a schematic diagram of the high beam light type when a single light emitting unit 110 in the vehicle lamp module 10 of the present application is lit. When one of the light emitting units 110 is lit, the light spot projected by the outer lens 300 is a long rectangular light spot extending along the second direction Z.
[0084] like Figure 8As shown, it is a schematic diagram of the high beam light type when all the light-emitting units 110 in the vehicle lamp module 10 of the present application are lit. When all the light-emitting units 110 are lit, the light spots corresponding to the multiple light-emitting units 110 overlap, so that the light spot finally projected by the outer lens 300 is a long rectangular light spot extending along the first direction X.
[0085] like Fig. 9 As shown, it is a schematic diagram of the high beam light pattern after the two middle light-emitting units 110 in the headlight module 10 of the present application are turned off. When the two middle light-emitting units 110 are turned off, a dark area will be formed in the high beam light pattern, and the dark area has clear boundaries and regular shapes, so that the headlight module 10 can achieve better adaptive anti-glare function.
[0086] In some embodiments, Figure 4 As shown, the distance between the light-emitting surface of the light-emitting unit 110 and the first light-entering surface 221 is greater than 0.5 mm. Since the light guide 200 can be made of plastic transparent materials such as polymethacrylimide (PMMI), polycarbonate (PC), etc., therefore, setting the distance between the light-emitting surface of the light-emitting unit 110 and the first light-entering surface 221 to be greater than 0.5 mm can prevent the heat of the light-emitting unit 110 from being directly transferred to the light guide 200 and causing the light guide 200 to melt or deform, thereby helping to improve the heat dissipation performance and reliability of the vehicle lamp module 10. Optionally, the distance between the light-emitting surface of the light-emitting unit 110 and the first light-entering surface 221 can be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc., and can be flexibly designed according to the specific situation.
[0087] In some embodiments, Figure 4 As shown, the length of the light guide portion 220 along the axial direction of the optical axis L of the outer lens 300 is less than or equal to 3 mm. Since the light guide portion 220 only collimates the visible light by total reflection in the first direction X, the divergence angle of the visible light is controlled by the first light exit surface 211 in the second direction Z. Therefore, the length of the light guide portion 220 can be reduced. In this way, it is helpful to reduce the processing difficulty of the light guide 200, reduce the cost, and improve the yield. Optionally, the length of the light guide portion 220 can be 3 mm, 2.9 mm, 2.8 mm, 2.7 mm, 2.6 mm, etc.
[0088] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the outer lens 300 includes a second light incident surface 350 and a second light emitting surface 360. The second light incident surface 350 is located between the second light emitting surface 360 and the first light emitting surface 211. In the second direction Z, a line connecting the center of the second light incident surface 350 and the center of the second light emitting surface 360 does not coincide with the optical axis L of the outer lens 300.
[0089] Since the first light-emitting surface 211 of the light guide 200 is a free-form surface, it collimates the light in the first direction X and forms a light with a preset divergence angle in the second direction Z, so that the light beam emitted by the first light-emitting surface 211 has a center offset. In this embodiment, the optical axis L of the outer lens 300 is also set to a deviated state. On the one hand, the initial deviation of the light beam emitted by the first light-emitting surface 211 can be compensated by asymmetric refraction, so that as much light as possible emitted from the first light-emitting surface 211 is incident on the outer lens 300, reducing the problem of edge light leakage, which is conducive to improving the utilization rate of light. On the other hand, the light beam emitted by the first light-emitting surface 211 can be further precisely controlled in the second direction Z, which is also conducive to improving the uniformity of the light intensity distribution of the high beam light type.
[0090] In some embodiments, Figure 3 As shown, the second light incident surface 350 is a plane, the second light emitting surface 360 is a convex curved surface, and the light emitting surface of the light emitting unit 110, the first light incident surface 221, and the second light incident surface 350 are parallel to each other. In this way, only the curved surface of the second light emitting surface 360 can be designed, which is conducive to reducing the processing difficulty of the outer lens 300 and improving the design convenience.
[0091] In other embodiments, the second light incident surface 350 and the second light emitting surface 360 are both convex curved surfaces. With such a configuration, the light emitted from the first light emitting surface 211 can be precisely controlled by designing the second light incident surface 350 and the second light emitting surface 360, thereby facilitating improving the lighting effect of the high beam light type projected by the outer lens 300.
[0092] In some embodiments, the width of the outer lens 300 in the first direction X is greater than 50 mm, and the height in the second direction Z is greater than 25 mm. This arrangement can ensure that the outer lens 300 has a certain size and can receive all the outgoing light from the first light-emitting surface 211, so that the light intensity and luminous flux of the projected high-beam light type meet the lighting requirements.
[0093] In some embodiments, a microstructure pattern is provided on the second light-emitting surface 360 of the outer lens 300, wherein the edge shape of the microstructure pattern may be a rectangle, a rhombus, or other polygonal shapes, and each microstructure pattern may be an outer convex surface, an inner concave surface, or a plane. This is conducive to further improving the uniformity of the emitted high-beam light pattern.
[0094] In the second aspect, the embodiment of the present application proposes a vehicle lamp, comprising the vehicle lamp module 10 described in the first aspect. With such a configuration, the length of the light guide portion 220 can be reduced, so that the light guide portion 220 becomes a short-sized light guide. In this way, firstly, the processing difficulty and assembly difficulty of the light guide 200 can be reduced, which is conducive to improving the manufacturing yield of the vehicle lamp. Secondly, the material requirements of the light guide portion 220 and the light guide substrate 210 are reduced, and they can be made of low-cost plastic transparent materials, which is also conducive to reducing the manufacturing cost of the vehicle lamp.
[0095] In some embodiments, the headlight generally further includes a housing for accommodating the headlight module 10. It is understood that in order to make the high beam light type projected by the headlight module 10 meet the lighting requirements of the vehicle, the installation angle of the headlight module 10 in the housing can also be adjusted. For example, if the high beam projected by the headlight module 10 deviates from the horizontal plane too much upward, resulting in poor lighting effect on the ground, the entire headlight module 10 can be rotated downward by a certain angle, such as 1°, 2°, etc., relative to the housing with the first direction X as the axis. Similarly, if the high beam projected by the headlight module 10 deviates from the horizontal plane too much downward, resulting in poor lighting effect at a distance, the entire headlight module 10 can be rotated upward by a certain angle, such as 1°, 2°, etc., relative to the housing with the first direction X as the axis. Thus, the lighting effect of the headlight meets the regulatory requirements. Among them, the upper direction is the direction away from the ground, the lower direction is the direction close to the ground, the first direction X can be the left and right direction of the vehicle, and the second direction Z can be the height direction of the vehicle.
[0096] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A vehicle light module, characterized in that: include: A light source, comprising a plurality of light emitting units arranged along a first direction, wherein the light emitting units are used to emit visible light; A light guide, comprising a light guide base and a plurality of light guide portions arranged on a side of the light guide base close to the light source, wherein the light guide portion comprises a first light incident surface and a first total reflection surface and a second total reflection surface arranged on opposite sides of the first light incident surface along the first direction, each of the first light incident surfaces is arranged opposite to a light emitting surface of a light emitting unit, and the light guide base comprises a first light emitting surface extending linearly along the first direction, wherein the first light emitting surface is a free-form surface having a continuous curvature; The first light incident surface is used to refract the visible light into the light guide member, the first total reflection surface and the second total reflection surface are convex curved surfaces, the first total reflection surface and the second total reflection surface are used to collimate the visible light into parallel light along the first direction and emit it through the first light exiting surface, the first light exiting surface is used to refract the visible light into output light with a preset divergence angle along the second direction, and the second direction is perpendicular to the first direction; The outer lens is arranged on a side of the light guide member away from the light source, and is used for receiving the light emitted from the first light emitting surface and projecting it into a high beam light pattern.
2. The vehicle light module according to claim 1, characterized in that: Along the second direction, the optical axis of the outer lens coincides with the light emitting center of the light emitting unit, wherein: The divergence angle of the first refracted light beam after the visible light is refracted by the first light incident surface is greater than or equal to -41° and less than or equal to 41°; Along the second direction, a divergence angle of a second refracted light beam after the first refracted light beam is refracted by the first light-emitting surface is greater than or equal to -22° and less than or equal to 7.5°.
3. The vehicle light module according to claim 2, characterized in that: Along the second direction, in the process that the deflection angle between the light in the first refracted light beam and the optical axis gradually increases from -8° to 41°, the deflection angle between the light in the second refracted light beam and the optical axis gradually increases from -8° to +7.5°; In the process that the deflection angle between the light in the first refracted light beam and the optical axis gradually decreases from -8° to -41°, the deflection angle between the light in the second refracted light beam and the optical axis gradually decreases from -8° to -22°.
4. The vehicle light module according to claim 3, characterized in that: The visible light includes a first light and a second light, wherein: Along the second direction, the angle between the first light and the optical axis is 0°, and the angle between the first light and the optical axis after being emitted through the first light-emitting surface is -6.4°; The angle between the first refracted light ray after the second light ray is refracted through the first light incident surface and the optical axis is 18°, and the angle between the second refracted light ray after the first refracted light ray is refracted through the first light exiting surface and the optical axis is 0°.
5. The vehicle light module according to claim 1, characterized in that: The light guide substrate further comprises a first side surface and a second side surface provided on opposite sides of the first light emitting surface along the first direction, and the first side surface and the second side surface are provided with a leather grain structure; And / or, the light guide substrate further comprises a first plane opposite to the first light emitting surface, the light guide portion is arranged on the first plane, the first plane has a first area which does not overlap with the light guide portion, and the first area is provided with a dermatoglyphic structure; And / or, the outer lens includes a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall and the second side wall are arranged on opposite sides of the outer lens along the first direction, the third side wall and the fourth side wall are arranged on opposite sides of the outer lens along the second direction, and the first side wall, the second side wall, the third side wall and the fourth side wall are provided with a leather grain structure.
6. The vehicle lamp module according to claim 1, characterized in that: The light guide substrate further includes a first plane opposite to the first light emitting surface, the light guide portion is arranged on the first plane, and the focus of the outer lens is located in the first plane.
7. The vehicle lamp module according to claim 1, characterized in that: The distance between the light-emitting surface of the light-emitting unit and the first light-incident surface is greater than 0.5 mm; And / or, the length of the light guiding portion along the axial direction of the optical axis of the outer lens is less than or equal to 3 mm.
8. The vehicle light module according to claim 1, characterized in that: The outer lens includes a second light incident surface and a second light emitting surface, the second light incident surface is located between the second light emitting surface and the first light emitting surface, and along the second direction, a line connecting a midpoint of the second light incident surface and a midpoint of the second light emitting surface does not coincide with the optical axis of the outer lens.
9. The vehicle light module according to claim 8, characterized in that: The second light incident surface is a plane, the second light emitting surface is a convex curved surface, and the light emitting surface of the light emitting unit, the first light incident surface and the second light incident surface are parallel to each other; Alternatively, both the second light incident surface and the second light emitting surface are convex curved surfaces.
10. A vehicle lamp, characterized in that: It comprises the vehicle light module as described in any one of claims 1-9.