Light in-coupling structure
By designing multiple parabolic refractive and reflective surfaces, the light source is uniformly positioned at the focal point, solving the problems of low light efficiency and structural congestion caused by multiple light sources sharing a single collimation structure, thus improving the optical system efficiency and light uniformity of the vehicle headlight.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU XINGYU AUTOMOTIVE LIGHTING SYST CO LTD
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-04
AI Technical Summary
When multiple light sources share a collimation structure in existing vehicle lights, they cannot all be at the focal point, resulting in reduced light efficiency, affecting the lighting effect, heat generation, and power consumption of the lights. At the same time, the structure is crowded and space is wasted.
By employing multiple parabolic first and second refractive surfaces, combined with a first reflective surface, an optical coupling structure is designed so that all light sources are positioned at the focal point. Through refraction and total internal reflection, efficient light emission is achieved, improving light uniformity and efficiency.
This achieves uniform placement of the light source at the focal point, improving light efficiency and the overall efficiency of the optical system, reducing power consumption and heat, and minimizing structural congestion and space waste.
Smart Images
Figure CN224593111U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive lighting technology, specifically relating to light-incident coupling structures. Background Technology
[0002] As vehicle headlights become increasingly compact and integrated, they also offer a wider range of functions and colors. Typically, white light is used for daytime running, yellow light for turning, and red light for braking. Different colors of light require different light sources, and multiple light sources share a single collimation structure at the light input end, such as a condenser or reflector.
[0003] However, since a collimation structure at the light-incident end has only one focal point, and multiple light sources cannot all be at the focal point, the overall efficiency of the optical system is reduced, which affects the lighting effect of the car lights and issues such as heat, power consumption, and cost. Furthermore, equipping each light source with a collimation structure at the light-incident end results in structural congestion and wasted space. Utility Model Content
[0004] The purpose of this invention is to provide an incident light coupling structure to solve the technical problem that multiple light sources sharing a collimation structure cannot all be at the focal point, resulting in reduced light efficiency. This invention aims to increase the focal point and ensure that all light sources are positioned at the focal point, thereby improving light efficiency.
[0005] To solve the above-mentioned technical problems, this utility model provides an optical coupling structure, including:
[0006] A first refractive surface is provided, and multiple first refractive surfaces are horizontally connected to each other; each of the multiple first refractive surfaces is parabolic in shape and has a focal point, and a light source is provided at the focal point.
[0007] The second refractive surface is connected to both ends of the plurality of first refractive surfaces;
[0008] A first reflecting surface, and the end of the second refracting surface away from the first refracting surface is connected to the first reflecting surface;
[0009] Of these, a portion of the light rays strikes the first refracting surface and is refracted by the first refracting surface before being emitted horizontally;
[0010] Another portion of the light rays strikes the second refracting surface, is refracted by the second refracting surface, and then strikes the first reflecting surface. The light rays undergo total internal reflection on the first reflecting surface and then emerge horizontally.
[0011] Furthermore, the adjacent first refractive surfaces are symmetrically arranged with respect to the light emission direction;
[0012] The second refracting surface extends in a direction close to the focal point, and the first reflecting surface extends in a direction away from the focal point.
[0013] Furthermore, multiple second refracting surfaces and first reflecting surfaces are provided, and the end of the first reflecting surface away from the second refracting surface is sequentially connected to the second refracting surface and the first reflecting surface.
[0014] Furthermore, the two ends of the plurality of first reflective surfaces are connected by horizontal light-emitting surfaces.
[0015] Furthermore, a second reflective surface is inclinedly provided at the end of the light-emitting surface that is away from the first refractive surface;
[0016] In this process, the light rays exit through the light-emitting surface and strike the second reflective surface, where they undergo total internal reflection and then exit horizontally.
[0017] Furthermore, the first refracting surface, the second refracting surface, the first reflecting surface, and the light-emitting surface are all transparent.
[0018] Furthermore, the light source has multiple colors.
[0019] The beneficial effects of this utility model are:
[0020] This invention sets up a first refractive surface, and a light source is placed at the focal point of multiple first refractive surfaces, so that the light source emits light from the focal point. The light efficiency is high, different colors of the car headlights are emitted and emitted at the focal point, the light uniformity is high, and the optical system efficiency is high.
[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the optical coupling structure of this utility model;
[0024] Figure 2 This is an optical path diagram of the optical coupling structure of this utility model;
[0025] Figure 3This is a schematic diagram of the light-incident coupling structure and the second reflective surface of this utility model.
[0026] In the picture:
[0027] 1. First refractive surface; 2. Second refractive surface; 3. First reflecting surface; 4. Second reflecting surface; 5. Light-emitting surface. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] Example 1:
[0030] like Figures 1 to 3 As shown, the light-coupled structure includes: a first refractive surface 1, a second refractive surface 2, and a first reflective surface 3. The two ends of the first refractive surface 1 are connected to the second refractive surface 2 and the first reflective surface 3 in sequence. The first refractive surface 1 and the second refractive surface 2 are both used for light refraction, and the first reflective surface 3 is used for total internal reflection of light.
[0031] The system comprises multiple first refractive surfaces 1, which are horizontally connected and connected at their ends. Adjacent first refractive surfaces 1 are symmetrically arranged about the light emission direction. Each first refractive surface 1 is parabolic and has a focal point. A light source is located at each focal point, and the light source has multiple colors, which can be monochromatic or a combination of two colors. The light source can be a dual-core LED. This structure uses dual light multiplexing and has dual focal points. Each light source is not defocused, reducing power consumption, heat generation, and cost reduction. It also reduces the number of collimation structures, thereby avoiding overcrowding and wasted space in the headlight.
[0032] In this embodiment, both ends of the plurality of first refractive surfaces 1 are connected to second refractive surfaces 2, and the end of the second refractive surface 2 away from the first refractive surface 1 is connected to a first reflective surface 3; the plurality of first refractive surfaces 1 are connected to form a whole, and both ends of the whole are sequentially connected to second refractive surfaces 2 and first reflective surfaces 3, the second refractive surfaces 2 extend in the direction close to the focal point, the first reflective surfaces 3 extend in the direction away from the focal point, and the second refractive surfaces 2 and the first reflective surfaces 3 are sequentially disposed on the outside of the first refractive surfaces 1.
[0033] In this system, the light source emits light at the focal point. Part of the light is refracted by the first refractive surface 1 and then emitted horizontally. The other part of the light is refracted by the second refractive surface 2 and then emitted by the first reflective surface 3. The light undergoes total internal reflection on the first reflective surface 3 and then is emitted horizontally. The two parts of the emitted light are parallel light rays in the same direction, making the light more uniform and improving the lighting effect of the headlights.
[0034] Example 2:
[0035] Based on Embodiment 1, multiple second refractive surfaces 2 and first reflective surfaces 3 are provided. The end of the first reflective surface 3 away from the second refractive surface 2 is connected to the second refractive surface 2 and the first reflective surface 3 in sequence. That is, the two ends of the first refractive surface 1 can be connected to the second refractive surface 2 and the first reflective surface 3 multiple times. The second refractive surface 2 and the first reflective surface 3 are arranged alternately. Increasing the number of second refractive surfaces 2 and first reflective surfaces 3 can make large-angle light rays shine on the second refractive surface 2, and then shine on the first reflective surface 3 and then be emitted horizontally, thereby improving the light utilization rate.
[0036] In this embodiment, the two ends of multiple first reflective surfaces 3 are connected by horizontal light-emitting surfaces 5, and multiple second refracting surfaces 2 and first reflective surfaces 3 are connected as a whole. The two ends of this whole are connected by horizontal light-emitting surfaces 5. Light rays pass through the first refracting surface 1, the second refracting surface 2, and the first reflective surface 3 and are emitted from the light-emitting surface 5. The end of the light-emitting surface 5 away from the first refracting surface 1 is provided with a second reflective surface 4 at an angle. The second reflective surface 4 can also be other optical structures. After the light rays are emitted from the light-emitting surface 5, they strike the second reflective surface 4. The light rays undergo total internal reflection on the second reflective surface 4 and are emitted horizontally. By setting the second reflective surface 4, the light rays are emitted from the desired direction, and the uniformity of the light rays is improved.
[0037] Example 3:
[0038] Based on Example 2, the first refractive surface 1, the second refractive surface 2, the first reflective surface 3, and the light-emitting surface 5 are all transparent, and the first refractive surface 1, the second refractive surface 2, the first reflective surface 3, and the light-emitting surface 5 are made of transparent materials such as PMMA, PC, or glass.
[0039] Among them, the first refractive surface 1, the second refractive surface 2, and the first reflective surface 3 can be designed with light distribution patterns according to requirements to make the lighting effect more uniform, and the second reflective surface 4 can be added with patterns or textures according to actual needs.
[0040] The axes of the first refractive surface 1, the second refractive surface 2, and the first reflecting surface 3 can be straight lines, curves, or arcs.
[0041] In summary, the light source emits light at the focal point. Part of the light strikes the first refractive surface 1 and is refracted by the first refractive surface 1 before exiting horizontally. Another part of the light strikes the second refractive surface 2 and is refracted by the second refractive surface 2 before striking the first reflecting surface 3. The light then undergoes total internal reflection on the first reflecting surface 3 and exits horizontally. The two parts of the light emitted are parallel rays in the same direction, making the light more uniform and improving the lighting effect of the headlights. Multiple colored light sources are all set at different focal points, and the light emitted by the light sources is refracted and totally reflected at the focal points, resulting in high uniformity and efficiency of the light, thereby improving the efficiency of the overall optical system.
[0042] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0043] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An optical coupling structure, characterized in that, include: A first refractive surface (1) is provided, and multiple first refractive surfaces (1) are horizontally connected to each other; Each of the first refractive surfaces (1) is parabolic and has a focal point, and a light source is disposed at the focal point; The second refractive surface (2) is connected to both ends of the plurality of first refractive surfaces (1); The first reflecting surface (3) is connected to the second refracting surface (2) at the end away from the first refracting surface (1); Among them, a portion of the light rays strikes the first refracting surface (1), is refracted by the first refracting surface (1), and then exits horizontally; Another portion of the light rays strikes the second refractive surface (2), and after being refracted by the second refractive surface (2), they strike the first reflective surface (3). The light rays undergo total internal reflection on the first reflective surface (3) and then emerge horizontally.
2. The optical coupling structure as described in claim 1, characterized in that, The adjacent first refractive surfaces (1) are symmetrically arranged with respect to the light emission direction; The second refracting surface (2) extends in a direction close to the focal point, and the first reflecting surface (3) extends in a direction away from the focal point.
3. The optical coupling structure as described in claim 1, characterized in that, Multiple second refractive surfaces (2) and first reflective surfaces (3) are provided. The end of the first reflective surface (3) away from the second refractive surface (2) is connected to the second refractive surface (2) and the first reflective surface (3) in sequence.
4. The optical coupling structure as described in claim 3, characterized in that, The two ends of the plurality of first reflective surfaces (3) are connected by a horizontal light-emitting surface (5).
5. The optical coupling structure as described in claim 4, characterized in that, The light-emitting surface (5) is provided with a second reflective surface (4) at an angle away from the first refractive surface (1); The light rays are emitted from the light-emitting surface (5) and then strike the second reflective surface (4). The light rays undergo total internal reflection on the second reflective surface (4) and then exit horizontally.
6. The optical coupling structure as described in claim 4, characterized in that, The first refracting surface (1), the second refracting surface (2), the first reflecting surface (3), and the light-emitting surface (5) are all transparent.
7. The optical coupling structure as described in claim 1, characterized in that, The light source has multiple colors.