CN119532654B

CN119532654B - Headlamp assembly

Info

Publication number: CN119532654B
Application number: CN202510097797.XA
Authority: CN
Inventors: 傅森; 康永仁
Original assignee: Suzhou Yaoteng Photoelectric Co ltd
Current assignee: Suzhou Yaoteng Photoelectric Co ltd
Priority date: 2025-01-22
Filing date: 2025-01-22
Publication date: 2025-03-28
Anticipated expiration: 2045-01-22
Also published as: CN119532654A

Abstract

The invention provides a headlamp assembly, which comprises a light source and a light guide structure, wherein the light guide structure comprises a collecting surface, a plurality of reflecting surfaces, a multi-ellipse reflecting surface, a stop line forming surface and a lens surface, the collecting surface is used for collecting the light rays emitted by the light source and forming collimated light rays, the reflecting surfaces are used for reflecting part of the collimated light rays and finally reflecting the part of the collimated light rays to the multi-ellipse reflecting surface, the multi-ellipse reflecting surface is used for receiving the part of the light rays and reflecting the part of the light rays to the lens surface, the stop line forming surface is provided with a shading upper surface and an end part, the upper surface forms a step surface in the transverse direction of the light guide structure, the end part is arranged on one side of the step surface close to the lens surface, and the lens surface is used for projecting illumination light containing the part of the collimated light rays reflected by the multi-ellipse reflecting surface and other light rays. The invention solves the problem of difficult assembly caused by complex part structure of the front light assembly.

Description

Headlamp assembly

Technical Field

The invention relates to the technical field of automobile illumination, in particular to a headlamp assembly.

Background

In the technical field of automotive lighting, low beam lamps are used as essential lighting devices for vehicles running at night or under low visibility conditions, and the performance of the low beam lamps is directly related to driving safety and driving comfort. In order to meet the requirements of low-beam regulations of vehicles in various countries, various optical design schemes are continuously explored and adopted in the industry to realize efficient low-beam functional modules.

At present, the mainstream optical scheme mainly comprises four schemes, wherein the first scheme combines a light source, a reflector, a shading sheet and an aspheric lens, the light source, the reflector, the shading sheet and the aspheric lens, the shading effect of the reflector and the aspheric lens are combined for projection to form a dipped beam light type meeting regulations, the second scheme adopts a combination of the light source, a condenser lens, the shading sheet and the aspheric lens, the condenser lens is used for enhancing the concentration degree of the light source and redistributing light rays, the light rays are projected through the shading sheet and the aspheric lens to reach the dipped beam standard, the third scheme adopts the light source, the total reflection lens and the aspheric lens, the total reflection lens only can realize light path control, but can not effectively control the light ray distribution, and the fourth scheme adopts the combination of the light source, the reflector (the rear edge of the reflector is designed into a cut-off line shape) and the aspheric lens, and the required dipped beam effect is formed through preliminary reflection of the reflector and further adjustment of the aspheric lens.

However, these solutions have many parts, complex structures and various materials, which cause many problems of difficult assembly. The precision assembly of a plurality of parts is required, so that the processing and purchasing difficulties are increased, the production period and the cost are prolonged, meanwhile, as the number of parts is increased, the assembly precision of the module assembly is also challenging, and any small assembly error can influence the accuracy of dipped beam patterns and the compliance of regulations. Therefore, there is a need for a low beam module design that simplifies construction, improves assembly accuracy, and reduces cost.

Disclosure of Invention

The invention aims to provide a headlamp assembly, which solves the problems that the headlamp assembly in the prior art has complex part structure, various materials, difficult integration in design and difficult assembly.

In order to achieve the above object of the present invention, an embodiment of the present invention provides a head lamp assembly, including:

A light source for emitting light, and

The light guide structure is arranged on the surface of the light guide plate,

The light guide structure includes:

The light collecting surface is used for collecting the light rays emitted by the light source and forming collimated light rays;

The plurality of reflecting surfaces are used for reflecting part of light rays in the alignment straight light rays and reflecting the part of light rays to the plurality of elliptical reflecting surfaces;

The multi-ellipse reflecting surface is used for receiving part of the light rays and reflecting the part of the light rays to the lens surface;

The cut-off line forming surface is provided with an upper surface and an end part, the upper surface forms a stepped surface in the transverse direction of the light guide structure, and the end part is arranged on one side of the stepped surface close to the lens surface;

And the lens surface is used for projecting illumination light containing the part of light rays reflected by the multi-oval reflecting surface and the rest of light rays in the collimated light rays, wherein a light distribution pattern formed after the projection of the illumination light contains a cut-off line corresponding to the end shape, and a brightness enhancement part below the cut-off line is formed after the part of light rays are projected through the lens surface.

As a further improvement of an embodiment of the present invention, the light guiding structure is an optical element of an integrated structure formed of a transparent material.

As a further improvement of an embodiment of the present invention, wherein the shape of the cutoff line is a shape corresponding to the shape of the edge portion connecting the end portion and the upper surface.

As a further improvement of an embodiment of the present invention, the lens surface has an optical axis formed in a horizontal direction, the light guiding structure has a mounting end disposed opposite to the lens surface, a mounting groove is disposed on the mounting end, the mounting groove penetrates the light guiding structure in a lateral direction of the light guiding structure and has a first side wall and a second side wall located on upper and lower sides of the optical axis, a groove bottom of the mounting groove is disposed as an arc surface protruding in a direction away from the lens surface, the light collecting surface includes two light collecting side walls, the first side wall, the second side wall and the arc surface, which are disposed opposite to each other in a vertical direction, the light collecting side walls extend from the mounting end toward the lens surface and away from the optical axis, the first side wall and the second side wall are located between the two light collecting side walls, and the light source is disposed in the mounting groove and emits the light toward the first side wall, the second side wall and the arc surface.

In a further improvement of an embodiment of the present invention, the plurality of reflecting surfaces include a first reflecting surface and a second reflecting surface that are disposed opposite to each other in a vertical direction, the light of the light source is converged into a first collimated light through one light-converging side wall after being incident from the first side wall, the light of the light source is converged into a second collimated light after being incident from the arc surface, the first collimated light and the second collimated light pass through between the first reflecting surface and the second reflecting surface and are projected onto the lens surface, the light of the light source is converged into a third collimated light through the other light-converging side wall after being incident from the second side wall, and then is reflected to the first reflecting surface, then is reflected to the second reflecting surface, and finally is reflected to the multi-elliptic reflecting surface by the second reflecting surface.

As a further improvement of an embodiment of the present invention, the first reflecting surface is disposed opposite to the other light-collecting side wall in a direction parallel to the optical axis, the first reflecting surface has a first end and a second end disposed opposite to each other, the first end intersects the optical axis, and the first reflecting surface extends from the first end to the second end in a direction away from the lens surface and away from the optical axis.

As a further improvement of an embodiment of the present invention, an included angle between the first reflecting surface and the second reflecting surface and the optical axis is 42.5-50 degrees.

As a further improvement of an embodiment of the present invention, the light guiding structure further includes a light shielding surface, and one end of the light shielding surface is connected to the end portion, and the other end of the light shielding surface extends toward the lens surface and away from the optical axis.

As a further improvement of an embodiment of the present invention, the upper surface has a first step surface located at a left side and a second step surface located at a right side in a transverse direction of the light guiding structure, the first step surface and the second step surface are parallel to the optical axis, an included angle between the light shielding surface and the first step surface is a, a distance from the lens surface to a lower end of the multi-elliptical reflecting surface in a direction parallel to the optical axis is L, a distance from the lower end of the lens surface to a lower end of the second reflecting surface in a direction perpendicular to the optical axis is K, and the included angle a is not more than actan (K/L).

As a further improvement of an embodiment of the present invention, the first step surface is lower than the second step surface, and the distance between the optical axis and each of the first step surface and the second step surface is not greater than 0.6mm.

As a further development of an embodiment of the invention, all focal points of the multi-elliptical reflecting surface lie in the focal plane of the lens surface.

As a further improvement of an embodiment of the present invention, the multi-elliptical reflecting surface includes a multi-elliptical reflecting surface body formed by a portion on the side wall of the light guiding structure and a reflecting film coated on the outer side of the multi-elliptical reflecting surface body.

As a further improvement of an embodiment of the present invention, the distance between the focal point of the lens surface and the end is not greater than 0.5mm.

Compared with the prior art, the invention has the beneficial effects that:

the integrated design light guide structure is adopted, so that the problems of difficult assembly and insufficient precision caused by complex part structures and various materials of the front light assembly are effectively avoided, and the problem that the existing design in the industry is difficult to design into an integrated structure is realized.

Drawings

FIG. 1 is a schematic diagram of a headlamp assembly according to an embodiment of the present invention;

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged view of M in FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a right side view of FIG. 1;

FIG. 7 is a schematic cross-sectional view in the direction B-B in FIG. 2;

FIG. 8 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 9 is a schematic view of FIG. 7 after light is removed;

fig. 10 is a graph showing illuminance distribution of illumination light projected by the headlamp assembly of fig. 1 using a contour line display.

The above description of the drawings includes the following reference numerals:

1. a light source;

2. A light guiding structure;

21. a condensing surface;

211. A condensing sidewall;

22. a multi-elliptical reflecting surface;

23. A cut-off line forming surface;

230. an upper surface;

231. an end portion;

232. a first step surface;

233. A second step surface;

234. a connection surface;

24. a lens surface;

241. an optical axis;

25. a mounting end;

251. a mounting groove;

2511. a first sidewall;

2512. A second sidewall;

2513. An arc surface;

26. A first reflecting surface;

261. a first end;

262. a second end;

27. a second reflecting surface;

28. a light shielding surface;

3. A cutoff line;

31. a first horizontal segment;

32. a second horizontal segment;

33. And a connecting section.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, the use of orientation terms such as "upper, lower, top, bottom" are generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, vertical or gravitational direction, and likewise, for ease of understanding and description, "inner, outer" refer to inner, outer relative to the profile of the component itself, but such orientation terms are not intended to limit the invention.

In order to solve the problems of complex structure and various materials of parts of a front light assembly in the prior art, the assembly is difficult. The invention provides a headlamp assembly.

A headlamp assembly according to an embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same or similar structures are denoted by the same reference numerals. The following embodiments are merely examples, and various modifications can be made within the scope of the present invention.

In the drawings, coordinate axes of an XYZ rectangular coordinate system are shown for easy understanding of the present invention. The X-axis is a coordinate axis extending in the left-right direction (i.e., the lateral direction) of a vehicle on which the headlamp assembly is mounted. When the vehicle is directed forward, the right side is in the +X-axis direction, and the left side is in the-X-axis direction. "front" is the direction of travel of the vehicle when traveling straight ahead. That is, "forward" is the direction in which the headlamp assembly irradiates light. The Y-axis is a coordinate axis extending in the up-down direction (i.e., vertical direction) of the vehicle. The upper side is in the +Y-axis direction, and the lower side is in the-Y-axis direction. The "upper side" is a direction toward the sky, and the "lower side" is a direction toward the ground (e.g., a road surface, etc.). The Z axis is a coordinate axis extending in the traveling direction of the vehicle when traveling straight. The traveling direction when the vehicle is traveling straight ahead is the +z-axis direction, and the traveling direction when the vehicle is traveling straight behind is the-Z-axis direction. The +Z axis direction is also referred to as "forward", and the-Z axis direction is also referred to as "backward".

The ZX plane is a plane parallel to the road surface. But in an ascending slope, a descending slope, a road inclined in the width direction, or the like, the road surface is inclined. Therefore, a plane perpendicular to the gravitational direction, that is, a horizontal plane, may not be practically parallel to the road surface. In the present application, however, the ZX plane, which is a plane parallel to the road surface, is also referred to as "horizontal plane".

The headlamp assembly irradiates, for example, the front of the vehicle. The front lighting module must be capable of radiating light of a light distribution pattern that illuminates an area defined by law or the like (hereinafter referred to as "road traffic regulation"). The term "light distribution" refers to the illuminance of the lighting device in each direction, that is, the illuminance distribution. That is, the "light distribution" is a spatial intensity distribution of light emitted from the illumination device. Further, "luminosity" is a physical quantity that indicates how intense light is emitted from a light source. The luminosity is a value obtained by dividing a light beam passing through a minute solid angle in a certain direction by the minute solid angle.

Generally, road traffic regulations require that a light distribution pattern of a low beam of a headlight device for an automobile be a laterally long shape that is short in the up-down direction and long in the left-right direction. Further, road traffic regulations require that boundary lines (i.e., cutoff lines) of light on the upper side of the light distribution pattern be clear in order not to glare the driver of the opposing vehicle. By "clear" is meant that the cutoff does not produce a large color difference or a large blur, etc. That is, the road traffic regulations require that the area on the upper side of the cutoff line (i.e., the outer side of the light distribution pattern) be sufficiently dark, and the area on the lower side of the cutoff line (i.e., the inner side of the light distribution pattern) be sufficiently bright, and the cutoff line be sufficiently clear.

Here, the "cutoff line" is a dividing line of a brighter region and a darker region formed in the case where light emitted from the headlamp assembly is irradiated to a wall or a screen. In general, the cutoff line is a dividing line existing on the upper side of the light distribution pattern. That is, the cutoff line is a boundary line indicating the brightness of the light on the upper side of the light pattern. That is, the cutoff line is a boundary line between a brighter region on the upper side of the light distribution pattern (i.e., a region on the inner side of the light distribution pattern) and a darker region (i.e., a region on the outer side of the light distribution pattern). The cutoff line is a term for explaining the irradiation direction of the headlight used when the automobile is in a wrong position. The light distribution pattern of a headlight used when a car is in a wrong position is also called a low beam.

The "light distribution pattern" means a shape of a light beam and an intensity distribution of light determined by a direction of light emitted from a light source.

The "light distribution pattern" is also used as meaning an illuminance pattern on the illuminated surface. The "light distribution" means a distribution of the intensity of light emitted from the light source with respect to the direction of the light. The "light distribution" is also used as meaning an illuminance distribution on the illuminated surface.

The headlamp assembly of the embodiment is used for irradiation of a low beam or a high beam of a headlamp mounted in a vehicle.

For example, a headlamp assembly is used for a headlamp for a motorcycle. In addition, the headlamp assembly is also used for headlamps of various vehicles such as three-wheeled vehicles and four-wheeled vehicles. Three-wheeled vehicles include, for example, automatic tricycles known as gyroscopes. The automatic tricycle is a scooter with one front wheel and two rear wheels and is composed of three wheels.

In the following description, a case of forming a light distribution pattern of a low beam of a headlamp assembly for a home car will be mainly described. The light distribution pattern of the low beam of the headlamp assembly for the home car includes a cutoff line including a straight line that is horizontal in the left-right direction (i.e., X-axis direction) of the car. Further, the area below the cutoff line (i.e., inside the light distribution pattern) is brightest.

Examples

As shown in fig. 1 to 10, there is generally shown a headlamp assembly provided in this embodiment, which specifically includes a light source 1, a light guiding structure 2.

The light source 1 is configured to emit light, and the light guiding structure 2 includes a collecting surface 21, a plurality of reflecting surfaces, a multi-elliptical reflecting surface 22, a cut-off line forming surface 23, and a lens surface 24.

The collecting surface 21 is configured to collect the light emitted from the light source 1 and form a collimated light beam, "collimated light beam" means that the light beam is collected to be, for example, a substantially parallel light beam, and in this embodiment, the collimated light beam is substantially parallel to the optical axis 241.

The plurality of reflecting surfaces are configured to reflect a portion of the collimated light and reflect the portion of the light toward the multi-elliptical reflecting surface 22, and the multi-elliptical reflecting surface 22 is configured to receive the portion of the light and reflect the portion of the light toward the lens surface 24.

The cut-off line forming surface 23 has a light-shielding upper surface 230 and an end 231, the upper surface 230 forms a stepped surface in the lateral direction of the light guiding structure 2 (refer to fig. 8, i.e., in the X-axis direction), and the end 231 is provided on the side of the stepped surface close to the lens surface 24.

In this embodiment, the upper surface 230 may be configured as a light absorbing surface, where a "light absorbing surface" refers to a surface that is mostly absorbed after light is incident on the surface, and is neither refracted nor reflected, so as to achieve a light shielding effect.

Of course, in some embodiments, the upper surface 230 may also be a transparent surface, so that the shaping of the cutoff line 3 is not affected by this arrangement.

The lens surface 24 is configured to project illumination light including the part of light reflected by the multi-elliptical reflecting surface 22 and the rest of light among the collimated light, wherein a light distribution pattern formed by the projection of the illumination light includes a cutoff line 3 corresponding to the shape of the end 231, and the part of light is projected by the lens surface 24 to form a brightness enhancement portion below the cutoff line 3.

< Light Source 1>

The light source 1 is provided with a light emitting surface capable of emitting light. From the viewpoints of reducing carbon dioxide (CO 2) emissions and saving fuel consumption, and further reducing the burden on the environment, it is recommended to select a semiconductor having high luminous efficiency as the light source 1. Examples of the semiconductor light source include a Light Emitting Diode (LED) and a Laser Diode (LD). In addition, the light source 1 may also employ a conventional lamp such as a halogen lamp as the light source. The light source 1 may be a solid-state light source such as an organic electroluminescence (organic EL) light source or a type that emits light from a phosphor by irradiation with excitation light. It is noted that semiconductor light sources are one type of solid state light source.

< Movement of light >

Referring to fig. 7, after the light source 1 emits light, the light is emitted from the-Z axis side toward the Z axis side, the lens surface 24 is located at the +z axis side of the light guiding structure 2, the light emitted from the light source is converged by the converging surface 21 and forms collimated light, and part of the collimated light is reflected by the plurality of reflecting surfaces, and finally the part of the light is reflected to the multi-elliptical reflecting surface 22, the multi-elliptical reflecting surface 22 receives the part of the light and reflects the part of the light to the lens surface 24, and the "multi-elliptical reflecting surface" is one end in the major axis direction of the ellipse (in the present invention, the end of the ellipse located at the-Z axis side) and extends to form an arc surface in the direction intersecting the optical axis 241.

The multi-elliptical reflecting surface 22 has a converging effect on light and has a plurality of focal points. The portion of the light reflected by the multi-elliptical reflecting surface 22 forms first illumination light that is directed toward the lens surface 24.

Of course, the remaining light rays, except the part of the collimated light rays reflected by the plurality of reflecting surfaces, directly reach the lens surface 24, and these remaining light rays form the second illumination light which is directed to the lens surface 24. "remaining rays" refers to rays of collimated light other than the portion of rays.

The second illumination light forms an illumination region in the light distribution pattern, and the first illumination light forms a brightness enhancing portion below a cutoff line of the light distribution pattern.

In this embodiment, the light on the +y-axis side of the cut-off line forming surface 23 may reach the lens surface 24, and the light on the +y-axis side of the cut-off line forming surface 23 includes the part of the light reflected by the multi-elliptical reflecting surface and the rest of the collimated light. The light on the-Y axis side of the cut-off line forming surface 23 is reflected by the reflecting surface, and cannot directly reach the lens surface 24, and when the light is reflected by the reflecting surface, the light becomes the part of the collimated light.

As described above, the upper surface 230 of the cut-off line forming surface 23 in the present embodiment has a step, as shown with reference to fig. 2 and 8, that is, a step is formed in the X-axis direction, and the end 231 is disposed on the side of the upper surface 230 near the lens surface 24.

Further referring to fig. 8, the upper surface has a first step surface 232 and a second step surface 233 which are disposed at intervals in the Y-axis direction, and the first step surface 232 and the second step surface 233 are disposed in order in the X-axis direction, and are connected by a connection surface 234.

Further, the shape of the end 231 of the cutoff line forming surface corresponds to the cutoff line 3 in the light distribution pattern. Specifically, the upper side of the end 231 corresponds to the cutoff line 3 in the light distribution pattern.

Still referring to fig. 7, the first illumination light passes through the +z axis side of the end 231 and the second illumination light passes through the +y axis side of the end 231, so that the shape of the end 231 corresponds to the cutoff line 3 in the light distribution pattern.

Further, the light guide structure 2 is an integrated structure formed by transparent materials, and the design not only improves the overall aesthetic property of the headlamp assembly, but also optimizes the optical performance of the headlamp assembly. The light guide structure 2 is made of an optical grade material with high transparency, such as polycarbonate or acrylic resin, which has good light transmittance and weather resistance and can ensure low loss of light during transmission. The design of the integrated structure means that each part of the light guiding structure 2 (including the condensing surface 21, the plurality of reflecting surfaces, the multi-elliptical reflecting surface 22, the cut-off line forming surface 23 and the lens surface 24) is integrally formed in the manufacturing process, so that assembly errors among components are reduced, and the precision of the optical system is improved. In addition, the integrated structure is also beneficial to simplifying the assembly process of the headlamp assembly, reducing the manufacturing cost and improving the reliability of the assembly. This design allows the headlamp assembly to maintain high performance while also providing good economy and practicality.

In the present embodiment, the shape of the cutoff line of the light distribution pattern of the illumination light closely corresponds to the shape of the end 231.

Specifically, the outline of the end 231 on the upper side of the light guide structure 2 directly determines the form of the cutoff line 3 in the light distribution pattern. In practice, the upper side of the end 231 may be designed as a straight line, a curved line or other complex shape to meet different lighting requirements. Accordingly, the cut-off line 3 in the light distribution pattern will also take on a shape matching with that, ensuring that the illumination effect meets the design requirements.

Further, in the present embodiment, as shown with reference to fig. 3 to 4, the lens surface 24 has an optical axis 241 formed in the horizontal direction. I.e. in the Z-axis or in a direction parallel to the Z-axis.

As shown in fig. 4, the light guiding structure 2 has a mounting end 25 arranged with respect to the lens surface 24, which mounting end 25 is designed to facilitate mounting of the light guiding structure 2 with other parts of the headlamp assembly, such as the light source 1. On the mounting end 25, a mounting groove 251 is provided, and the mounting groove 251 penetrates the light guiding structure 2 in a lateral direction of the light guiding structure 2 (i.e., a direction of the X axis or a direction parallel to the X axis in this embodiment). The mounting groove 251 has a first side wall 2511 and a second side wall 2512 on both upper and lower sides of the optical axis 241, which provide incident surfaces on which light emitted from the light source 1 is incident.

Further, the groove bottom of the mounting groove 251 is provided as an arc-shaped surface 2513 protruding in a direction away from the lens surface 24, which design helps to optimize the converging effect of the light rays.

The condensing surface 21 includes two condensing side walls 211 disposed opposite to each other in the vertical direction, and the first side wall 2511, the second side wall 2512, and the arc-shaped surface 2513 described above. "vertical" is also the Y-axis or direction parallel to the Y-axis in this embodiment. The light-gathering side walls 211 extend from the mounting end 25 toward the lens face 24 and away from the optical axis 241, with the first side wall 2511 and the second side wall 2512 being located therebetween to ensure that light is effectively focused.

The light source 1 is disposed in the mounting groove 251, and emits light to the first side wall 2511, the second side wall 2512, and the arc surface 2513. The layout ensures that the light emitted by the light source 1 can fully utilize the structural characteristics of the collecting surface 21 to form collimated light, and then the collimated light is reflected and projected through other parts of the light guide structure 2, so that the light distribution pattern meeting the design requirement is finally formed.

Specifically, the light emitted by the light source 1 enters from the first side wall 2511 and reaches one light-condensing side wall 211 to be condensed into the collimated light, and similarly, the light emitted by the light source 1 enters from the second side wall 2512 and reaches the other light-condensing side wall 211 to be condensed into the collimated light. Furthermore, after the light emitted by the light source 1 is incident on the arc surface 2513, the light can be converged into the collimated light after being converged by the arc surface 2513.

Note that the condensing surface 21 in the present embodiment is only an example, and other equivalent structures may be adopted to realize the same function as needed in practical applications.

The plurality of reflecting surfaces plays a vital role in the light guiding structure 2, including a first reflecting surface 26 and a second reflecting surface 27, which are disposed opposite to each other in the vertical direction. The light emitted from the light source 1 is converged and reflected through different paths, and finally a desired light distribution pattern is formed.

Specifically, referring to fig. 7, after the light of the light source 1 is incident from the first side wall 2511, the light is converged by one of the converging side walls 211 to form a first collimated light. At the same time, the light from the light source, after entering from the arc 2513, also converges into a second collimated light. The two collimated light beams pass between the first reflecting surface 26 and the second reflecting surface 27 and are directly projected onto the lens surface 24.

In addition, the light of the light source may be incident from the second side wall 2512 and converged by the other condensing side wall 211 to form a third collimated light ray. The beam of light is first projected onto the first reflective surface 26, then reflected by the first reflective surface 26 to the second reflective surface 27, and finally reflected by the second reflective surface 27 to the multi-elliptical reflective surface 22. This design ensures that the light can fully utilize each part of the light guide structure 2 to form a light distribution pattern meeting the requirements. Of course, other equivalent mechanical structures may be used in practical applications to achieve the same optical path design.

The first reflecting surface 26 is carefully arranged in a position relative to the other of the light-condensing side walls 211 in a direction parallel to the optical axis 241. This arrangement ensures that light rays are smoothly projected onto the first reflecting surface 26 after being converged by the other one of the light converging side walls 211. The first reflecting surface 26 has a first end 261 and a second end 262 disposed opposite to each other, wherein the first end 261 intersects the optical axis 241 to form a limit point of light reflection.

The first reflecting surface 26 extends from the first end 261 gradually in a direction away from the lens surface 24 and away from the optical axis 241 until reaching the second end 262. This design not only ensures efficient reflection of light rays at the first reflective surface 26, but also provides sufficient space for the subsequent propagation path of the light rays. Of course, in practical applications, the specific shape and extending direction of the first reflecting surface 26 may be adjusted as required to achieve the best optical effect.

The first reflecting surface 26 and the second reflecting surface 27 are designed with particular consideration to their angle with the optical axis 241 to ensure efficient reflection and convergence of light. The included angle between the two reflecting surfaces and the optical axis is determined to be 42.5-50 degrees through accurate calculation and optimization. This range ensures that light is sufficiently reflected and avoids optical losses due to too large or too small angles. In practical application, the included angle can be adjusted within the range according to specific requirements so as to achieve the optimal optical effect.

In the light guiding structure 2, a light shielding surface 28 is also skillfully arranged to further optimize the optical performance. Referring to fig. 2 and 3, one end of the light shielding surface 28 is closely connected to the end 231, so that structural integrity and stability are ensured. The other end extends towards the lens surface 24 and away from the optical axis 241, so that stray light can be effectively shielded, optical interference is reduced, and the definition and accuracy of the light distribution pattern are improved. In practical applications, the shape and extension length of the light shielding surface 28 may be adjusted according to specific requirements.

In this embodiment, referring to fig. 8, the upper surface has a step, that is, a first step surface 232 and a second step surface 233 that are spaced apart in the Y-axis direction, and the first step surface 232 and the second step surface 233 are sequentially disposed along the X-axis direction and are connected by a connection surface 234.

Fig. 10 is a graph showing the illuminance distribution of the headlamp assembly of the present embodiment, which is obtained by simulation, using a contour line display. "contour line display" means display using a contour map. The "contour map" is a map represented by dots of the same value connected by lines.

As can be seen from fig. 10, the cutoff line 3 of the light distribution pattern is clearly projected. Further, a light distribution pattern free from uneven light distribution can be realized. In the present embodiment, the cutoff line 3 is formed substantially in the X-axis direction. Specifically, the cutoff line shown in fig. 10 includes a first horizontal segment 31 (on the-X axis side), a second horizontal segment 32 (on the +x axis side), and a connecting segment 33. The first horizontal segment 31, the second horizontal segment 32, and the connecting segment 33 correspond to an edge portion of the end 231 connected to the first step surface 232, an edge portion of the end 231 connected to the second step surface 233, and an edge portion of the end 231 connected to the connecting surface 234, respectively. The first and second horizontal sections 31, 32 are substantially straight.

Referring to fig. 9, the angle between the light shielding surface and the first step surface 232 is a, and the angle a is a key parameter that directly affects whether a portion of the light reflected from the lower side of the multi-elliptical reflecting surface 22 can be smoothly projected onto the lens surface 24. To ensure that this optical path is not obstructed, we set a specific range of angles a.

The distance from the lens surface to the lower end of the multi-elliptical reflecting surface in the direction parallel to the optical axis 241 is L, and the distance from the lower end of the lens surface to the lower end of the second reflecting surface 27 in the direction perpendicular to the optical axis is K.

In order to ensure the stability and reliability of the optical performance, the included angle a is set to be equal to or less than arctan (K/L). Such a design not only ensures that the light shielding surface 28 can effectively shield stray light, but also ensures that the function of the cut-off line forming surface is not affected, providing good performance and stability for the whole optical system.

Further, the first step surface 232 is lower than the second step surface 233, forming a distinct stepped structure. In design, it is ensured that the vertical distance of the optical axis 241 to both the first step surface 232 and the second step surface 233 is strictly controlled within 0.6mm or 0.6 mm. With this arrangement, the distance of the cutoff line with respect to the optical axis 241 can be effectively controlled.

In this embodiment, the multi-elliptical reflecting surface 22 is preferably carefully designed to ensure that the primary focus is in close proximity to the focal position of the lens surface. Specifically, the focal point of the multi-elliptical reflecting surface 22 is located within the focal plane of the lens surface, and such a design ensures the imaging quality and focusing performance of the optical system, improving the overall optical effect.

The design of the multi-elliptical reflecting surface 22 is very fine, comprising a multi-elliptical reflecting surface body formed by portions on the side walls of the light guiding structure 2. In order to enhance the reflection effect and improve the optical efficiency, a layer of high-performance reflection film is coated on the outer side of the multi-elliptical reflection surface body. The reflective film has excellent reflectivity and durability, and can ensure that light rays are reflected on the multi-elliptical reflecting surface 22 efficiently and accurately. The reflective film may be a metal-plated reflective film, a metal dielectric reflective film, or the like.

In this embodiment, the focal position of lens face 24 is precisely calculated to ensure that it is no more than 0.5mm from end 231. The design not only ensures the imaging quality of the optical system, but also improves the focusing performance. During the manufacturing process, the focal position of the lens face 24 is ensured to meet design requirements by strict quality control and technical means, thereby ensuring consistency and stability of the optical system.

In summary, the following technical effects are achieved by the embodiments of the present invention:

the light guide structure 2 is integrally arranged, so that the problems of complex part structure and various materials of the front light assembly and difficult assembly are avoided.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A headlamp assembly, comprising:

A light source for emitting light, and

The light guide structure is arranged on the surface of the light guide plate,

The light guide structure includes:

2. The headlamp assembly of claim 1 wherein the light guiding structure is an optical element of unitary construction formed of a transparent material.

3. The headlamp assembly according to claim 1, wherein the shape of the cutoff line is a shape corresponding to a shape of an edge portion where the end portion and the upper surface are connected.

4. The headlamp assembly according to claim 1, wherein the lens surface has an optical axis formed in a horizontal direction, the light guide structure has a mounting end provided with a mounting groove with a first side wall and a second side wall located on upper and lower sides of the optical axis in a lateral direction of the light guide structure, a groove bottom of the mounting groove is provided with an arc surface protruding in a direction away from the lens surface, the light collecting surface comprises two light collecting side walls, the first side wall, the second side wall and the arc surface, which are oppositely arranged in a vertical direction, the light collecting side walls extend from the mounting end toward the lens surface and away from the optical axis, the first side wall and the second side wall are located between the two light collecting side walls, and the light source is disposed in the mounting groove and emits the light toward the first side wall, the second side wall and the arc surface.

5. The head lamp assembly of claim 4 wherein the plurality of reflective surfaces includes first and second reflective surfaces disposed opposite one another in a vertical direction, wherein light from the light source is incident from the first side wall and is converged into a first collimated light beam by one of the converging side walls, wherein light from the light source is incident from the arcuate surface and is converged into a second collimated light beam, wherein the first and second collimated light beams pass between the first and second reflective surfaces and are projected onto the lens surface, wherein light from the light source is incident from the second side wall and is converged into a third collimated light beam by the other converging side wall and is projected onto the first reflective surface, and wherein the first and second reflective surfaces are reflected by the first and second reflective surfaces and the second reflective surface are reflected onto the multi-elliptical reflective surface.

6. The headlamp assembly of claim 5 wherein the first reflective surface is disposed relative to the other of the light collecting sidewalls in a direction parallel to the optical axis, the first reflective surface having oppositely disposed first and second ends, the first end intersecting the optical axis, the first reflective surface extending from the first end to the second end in a direction away from the lens face and away from the optical axis.

7. The head lamp assembly of claim 6 wherein the first and second reflective surfaces are at an angle of 42.5-50 ° to the optical axis.

8. The headlamp assembly of claim 7 wherein the light guide structure further comprises a light shielding surface having one end connected to the end and the other end extending toward the lens face and away from the optical axis.

9. The head lamp assembly of claim 8 wherein the upper surface has a first stepped surface on a left side and a second stepped surface on a right side in a lateral direction of the light guiding structure, the first stepped surface and the second stepped surface are both parallel to the optical axis, an angle a between the light shielding surface and the first stepped surface is a, a distance from the lens surface to a lower end of the multi-elliptical reflecting surface is L in a direction parallel to the optical axis, a distance from the lower end of the lens surface to a lower end of the second reflecting surface is K in a direction perpendicular to the optical axis, and the angle a is actan (K/L).

10. The headlamp assembly of claim 9, wherein the first step surface is lower than the second step surface and the optical axis is no more than 0.6mm from both the first step surface and the second step surface.

11. The headlamp assembly of claim 1 wherein all focal points of the multi-elliptical reflecting surface lie in a focal plane of the lens face.

12. The headlamp assembly of claim 1 wherein the multi-elliptical reflector comprises a multi-elliptical reflector body formed by portions on the sidewalls of the light guide structure and a reflective film coated on the outside of the multi-elliptical reflector body.

13. The headlamp assembly of claim 1 wherein the focal point of the lens face is no more than 0.5mm from the end.