CN218510788U

CN218510788U - Light guide, lighting device and vehicle

Info

Publication number: CN218510788U
Application number: CN202222329386.3U
Authority: CN
Inventors: 邬斯华; 张冰; 巴欣·皮埃尔
Original assignee: Valeo Lighting Hubei Technical Center Co Ltd
Current assignee: Valeo Lighting Hubei Technical Center Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-02-21
Anticipated expiration: 2032-08-30

Abstract

The utility model provides a light guide, including entering light district section, leaded light district section and light-emitting district section, wherein: the light inlet section is configured to receive light from a light source and guide the light to the light guide section; in a first direction transverse to the main exit direction of the light guide, the light exit section comprises a first area abutting the light guide section and a second area located on at least one side of the first area and extending beyond the light guide section; a first part of light from the light inlet section is configured to be guided to a first area of the light outlet section through the inside of the light guide section; the second part of light from the light inlet section is configured to be emitted from the light guide section and is guided to the second area of the light outlet section through the outside of the light guide section. The utility model discloses still relate to a lighting device and vehicle.

Description

Light guide, lighting device and vehicle

Technical Field

The utility model relates to a car light technical field, concretely relates to light guide, lighting device and vehicle.

Background

Lighting devices are used to provide light for lighting and/or optical indicating functions, and are widely used in various fields, for example, in motor vehicles to secure safe driving using a lighting device such as a lamp. Various types of vehicle lights are often required on motor vehicles to perform different functions, including automotive headlamps, fog lights, tail lights, turn signals, brake lights, side marker lights, parking lights, and the like.

Light guides are commonly used in lighting devices to guide light in a desired manner. With the development of automotive lamp technology, some host manufacturers desire a light guide with an enlarged light exit area to enhance the illumination and/or optical indication functions, or to fulfill styling requirements, in which case the area of the light exit area of the light guide is often larger than the area of the light entrance area and/or the light guide area of the light guide, and therefore, there is a problem that the light exit area of the light guide cannot be fully lit.

SUMMERY OF THE UTILITY MODEL

Therefore, it is an object of the present invention to provide a light guide, a lighting device and a vehicle, which are capable of at least partially solving the above mentioned problems.

According to an aspect of the present invention, there is provided a light guide, including an incident light section, a light guide section, and an outgoing light section, wherein:

the light inlet section is configured to receive light from a light source and guide the light to the light guide section;

in a first direction transverse to the main exit direction of the light guide, the light exit section comprises a first region abutting the light guide section and a second region located on at least one side of the first region and extending beyond the light guide section;

a first part of light from the light inlet section is configured to be guided to a first area of the light outlet section through the inside of the light guide section;

the second part of the light from the light inlet section is configured to be emitted from the light guide section and guided to the second area of the light outlet section through the outside of the light guide section.

According to the utility model discloses an embodiment, through drawing forth light guide section with some light that comes from light guide section, make it outside leaded to the second region that surpasss the extension of light guide section at light guide section or light guide, can make the second region also lighted to make whole light guide section lighted.

In some embodiments, at least one first refractive surface is formed on the light guiding section, the first refractive surface extends transversely to the main exit direction and is configured to guide the second part of the light from the light entrance section to the second region of the light exit section.

In an embodiment of the present invention, the first refractive surface is configured to guide a portion of light from the light incident section to the outside of the light guiding section, so as to reach the second region of the light emitting section.

In some embodiments, in the first direction, two of the second regions are respectively formed on two sides of the first region, and at least two of the first refraction surfaces are respectively formed on two sides of the light guide section.

In some embodiments, the second region of the light-exiting section includes a second refraction surface facing the first refraction surface, and light from the first refraction surface is configured to be incident on the second region of the light-exiting section via the second refraction surface, wherein at least one of the first refraction surface, the second refraction surface, and the exit surface of the light-exiting section is provided with a light scattering structure. Through setting up light scattering structure, can make the effect of lighting more even.

In some embodiments, the light entrance section comprises a collimating structure for substantially collimating light rays from the light source to the light guiding section to improve optical efficiency and uniformity of the lighting effect.

In some embodiments, the collimating structure comprises a collimator, or at least one reflector, or a combination of a collimator and at least one reflector.

In some embodiments, the collimating structure comprises a first reflector disposed facing the light guiding section, configured to reflect light rays from the light source to the light guiding section;

at least one pillow-shaped protrusion is formed on the base surface of the first reflector, the pillow-shaped protrusion comprises a middle arc surface part and side wing parts on two sides of the middle arc surface part, and an included angle between each side wing part and the base surface is larger than an included angle between an extension surface of the arc surface part and the base surface. In this way, a part of the light from the light source is reflected at a large angle at the wing portion and is more deviated from the main exit direction when finally exiting, and a part of the light from the light source is reflected at a relatively small angle at the cambered portion and is less deviated from the main exit direction when finally exiting, which is very advantageous in the case where the light function realized by the light guide is required to have a large angle exit range by the regulations.

In some embodiments, the collimating structure further comprises a second reflector and a third reflector, wherein:

the second reflector comprises a parabolic reflector configured to reflect light rays from the light source substantially collimated to the third reflector;

the third reflector comprises a planar reflector configured to reflect light rays from the second reflector substantially collimated to the first reflector.

In some embodiments, the parabolic reflector has a focal point disposed proximate the light source and selected such that light rays from the light source are reflected substantially parallel by the parabolic reflector.

According to another aspect of the present invention, there is also provided a lighting device comprising any one of the light guides described above, and a light source that emits light toward the light guide.

According to still another aspect of the present invention, there is provided a vehicle including the above lighting device.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further explained in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings, wherein,

fig. 1 shows a perspective view of a light guide 1 according to an embodiment of the invention;

fig. 2 shows a left side view of the light guide 1 according to an embodiment of the invention in fig. 1 and a schematic view of the light path within the light guide 1;

fig. 3 shows a top view of the light guide 1 according to an embodiment of the invention in fig. 1 and a schematic illustration of the light path within the light guide 1;

fig. 4 shows a bottom view of the light guide 1 of fig. 1 according to an embodiment of the invention.

Detailed Description

Embodiments of the present invention are exemplarily described below. As those skilled in the art will appreciate, the illustrated embodiments may be modified in various different ways without departing from the inventive concept. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the following, the same reference numbers generally indicate functionally identical or similar elements.

Fig. 1 to 4 schematically show a light guide 1 according to an exemplary embodiment of the present invention, as shown, the light guide 1 has a main outgoing direction X, for example, a horizontal direction, and comprises a light entrance section 10, a light guide section 20 and a light exit section 30 sequentially arranged in the main outgoing direction X, wherein the light entrance section 10 receives light from a light source 40 and guides the light to the light guide section 20, the light guide section 20 guides the light from the light entrance section 10 to the light exit section 30, and finally the light exits through an exit surface 630 of the light exit section 30.

As shown in fig. 2, in a first direction Z transverse to the main exit direction X of the light guide 1, e.g. the vertical direction, the size of the light exit section 30 is larger than the size of the light guide section 20, i.e. comprises a portion extending beyond the light guide section 20, in particular, the light exit section 30 comprises a first region 610 abutting the light guide section 20, and a second region 620 located at least one side of the first region 610 in the first direction Z, the second region 620 not abutting the light guide section 20 but extending away from the light guide section in the first direction Z. The light-exiting section 30 is shown to include two second regions 620 respectively formed on both sides of the first region 610 in the first direction Z, but the light-exiting section 30 may include only one second region 520 formed on one side of the first region 610 in the first direction Z. Here, although fig. 2 shows the first direction Z as the vertical direction Z, it is understood that the first direction Z may be a direction perpendicular to the paper surface in fig. 2 or may be another direction transverse to the main emission direction Z.

In the prior art, light from the light source is generally directly guided to the first region 610 of the light-emitting section 30 through the inside of the light-guiding section 20, so that only the first region 610 can be lighted up, and the second region 620 where no light reaches becomes a dark region.

In the embodiment of the present invention, as shown in fig. 2, the first portion of light r1 from the light-entering section 10 is guided to the first region 610 of the light-exiting section 30 through the inside of the light-guiding section 20, and exits through the exit surface 630 of the light-exiting section 30. The second portion of the light r2 from the light-entering section 10 exits from the light-guiding section 20 and is guided to the second region 620 of the light-exiting section 30 through the outside of the light-guiding section 20.

In the embodiment of the present invention, by leading a part of the light from the light-in section 10 out of the light-guiding section 20, the light is guided to the second region 620 of the light-out section 30 outside the light-guiding section 20 or the light guide 1, which is extended beyond the light-guiding section 20, so that the second region 620 is also lighted, thereby lighting the whole light-out section 30.

As an example of the light guiding section 20 guiding a portion of the light from the light entering section 10 out of the light guiding section 20, a first refraction surface 510 is formed on the light guiding section 20, extending transversely to the main exiting direction X, for guiding a second portion of the light r2 from the light entering section 10 to a second region 620 of the light exiting section 30 through refraction of light. As shown in fig. 1, the second region 620 of the light-exiting section 30 includes a second refraction surface 520, and the light from the first refraction surface 510 enters the second region 620 via the second refraction surface 520 and finally exits from the exit surface 630 of the light-exiting section 30. The first and second incidence faces 510 and 520 constitute two side walls of a recess 50 formed on the light guide 1, wherein the recess 50 is recessed in the first direction Z.

As shown in the figure, the light guiding section 20 includes two first refraction surfaces 510 disposed on two sides of the light guiding section 20 in the first direction Z, respectively, for guiding the second portion of light r2 from the light entering section 10 to the corresponding second region 620. It is understood that the embodiments of the present invention are not limited thereto, and corresponding to the second region 620, the light guide section 20 may be formed with the first refraction surface 510 only on one side in the first direction Z, and on any one side of the light guide section 20, it may be formed with a plurality of first refraction surfaces 510, and the plurality of first refraction surfaces 510 may be formed in a step shape, for example, to avoid mutual interference.

As shown, a light scattering structure 530 is disposed on at least one of the first refraction surface 510 and the second refraction surface 520 to scatter light, so that the lighting effect is more uniform.

In an embodiment of the present invention, the light incident section 10 includes a collimating structure for substantially collimating and guiding the light from the light source 40 to the light guiding section 20, so as to improve the optical efficiency and improve the uniformity of the lighting effect. In one example, the collimating structure comprises a collimator (not shown), e.g. relatively oriented with respect to the light source 40 in the primary exit direction X, which directs light rays from the light source 40 directly, substantially collimated, into the interior of the light guiding section 20.

In another example, the collimating structure may comprise at least one reflector, for example, a parabolic reflector, a planar reflector, or a combination of both. Illustratively, as shown, the collimating structure includes a first reflector 400, a second reflector 200, and a third reflector 300, and the collimating structure may include a combination of a plurality of sets of three, for example, two sets as shown. Wherein the second reflector 200 comprises a parabolic reflector, the light from the light source 40 is incident to the parabolic reflector via the incident surface 100 of the light incident section 10, and the focal point of the parabolic reflector is disposed near the light source 40 and is selected to enable the light from the light source 40 to be reflected by the parabolic reflector in a substantially parallel manner. In determining the focal point of the parabolic reflector, the refraction effect of the incident surface 100 needs to be considered, for example, when the incident surface 100 comprises a plane, the virtual focal point of the light rays of the light source 40 refracted by the incident surface 100 is at the same position or near to the focal point of the parabolic reflector, so that the parabolic reflector reflects the light rays to the third reflector 300 in a substantially collimated manner.

The third reflector 300 comprises a planar reflector configured to reflect light rays from the second reflector 200 substantially collimated to the first reflector 400.

The first reflector 400 is disposed facing the light guide section 20, and is configured to reflect the light from the light source 40 reflected by the third reflector 300 to the light guide section 20. As shown in fig. 1 and 3, at least one pincushion protrusion 410 is formed on the base surface of the first reflector 400, the pincushion protrusion 410 includes a middle arc-shaped portion 420 and side wing portions 430 at both sides thereof, and an included angle between the side wing portions 430 and the base surface is larger than an included angle between an extension surface of the arc-shaped portion 420 and the base surface, so that a part of light rays r4 and r5 from the third reflector 300 are reflected at large angles at the side wing portions 430, respectively, and are more deviated from the main emission direction X when finally emitted, and a part of light rays r3 from the third reflector 300 are reflected at a relatively small angle at the arc-shaped portion 420, and are less deviated from the main emission direction X when finally emitted, which is very advantageous in a case where the light function realized by the light guide 1 is required to have a large angular light-emitting range.

In yet another example, the collimating structure may comprise a combination of a collimator and at least one reflector, wherein the collimator is oriented opposite the light source, configured to direct light rays from the light source substantially collimated to the at least one reflector, which further directs light rays substantially collimated to the light guiding section 20.

According to an embodiment of the present invention, there is also provided a lighting device comprising any one of the light guides 1 and the light source 40 as described above.

According to the utility model discloses an embodiment still includes a vehicle, includes lighting device as above.

The present invention is not limited to the above configuration, and various other modifications may be adopted. While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the present invention should be limited only by the attached claims.

Claims

1. A light guide (1) comprising a light entry section (10), a light guide section (20), and a light exit section (30), wherein:

the light inlet section (10) is configured to receive light from a light source (40) and guide the light to the light guide section (20);

-in a first direction (Z) transverse to a main exit direction (X) of the light guide (1), the light exit section (30) comprises a first region (610) interfacing with the light guide section (20), and a second region (620) located at least on one side of the first region (610) extending beyond the light guide section (20);

a first part of light from the light inlet section (10) is configured to be guided to a first area (610) of the light outlet section (30) through the inside of the light guide section (20);

a second part of the light from the light inlet section (10) is configured to exit from the light guide section (20) and is guided to a second area (620) of the light outlet section (30) through the outside of the light guide section (20).

2. The light guide (1) according to claim 1, wherein at least one first refractive surface (510) is formed on the light guiding section (20), the first refractive surface (510) extending transversely to the main exit direction (X) and being configured to guide the second portion of light rays from the light entry section (10) to a second region (620) of the light exit section (30).

3. The light guide (1) according to claim 2, wherein, in the first direction (Z), two of the second regions (620) are formed on both sides of the first region (610), respectively, and at least two of the first refraction surfaces (510) are formed on both sides of the light guide section (20), respectively.

4. The light guide (1) according to claim 2, wherein the second region (620) of the light exit section (30) comprises a second refractive surface (520) facing the first refractive surface (510), light rays from the first refractive surface (510) being configured to be incident via the second refractive surface (520) to the second region (620) of the light exit section (30), wherein a light scattering structure (530) is provided on at least one of the first refractive surface (510), the second refractive surface (520), the exit surface of the light exit section (30).

5. The light guide (1) according to any one of claims 1 to 4, wherein the light entry section (10) comprises collimating structures for guiding light rays from the light source (40) to the light guiding section (20) substantially collimated.

6. A light guide (1) according to claim 5, characterized in that the collimating structure comprises a collimator or at least one reflector or a combination of a collimator and at least one reflector.

7. The light guide (1) according to claim 5, wherein the collimating structure comprises a first reflector (400), the first reflector (400) being arranged facing the light guiding section (20) and configured to reflect light rays from the light source (40) to the light guiding section (20);

at least one pillow-shaped protrusion (410) is formed on a base surface of the first reflector (400), the pillow-shaped protrusion (410) comprises a middle cambered surface portion (420) and side wing portions (430) on two sides of the middle cambered surface portion, and an included angle between each side wing portion (430) and the base surface is larger than an included angle between an extension surface of the cambered surface portion (420) and the base surface.

8. A light guide (1) according to claim 7, characterized in that the collimating structure further comprises a second reflector (200) and a third reflector (300), wherein:

the second reflector (200) comprises a parabolic reflector configured to reflect light rays from the light source (40) substantially collimated to the third reflector (300);

the third reflector (300) comprises a planar reflector configured to reflect light rays from the second reflector (200) substantially collimated to the first reflector (400).

9. The light guide (1) according to claim 8, characterized in that the focal point of the parabolic reflector is arranged in the vicinity of the light source (40) and is selected such that the light rays from the light source (40) are reflected substantially parallel by the parabolic reflector.

10. An illumination device, comprising:

the light guide (1) according to any of claims 1 to 9;

a light source (40) emitting light towards the light guide (1).

11. A vehicle characterized by comprising a lighting device according to claim 10.