CN109990243A - Lighting device for motor vehicle and motor vehicle - Google Patents

Abstract

The present invention provides a light-emitting device (100) for a motor vehicle, comprising a light source (1), the light-emitting device (100) further comprising a light guide element and a light shielding part (5), the light guide element being configured as The light beam (B) emitted by the light source (1) is guided to exit from the light emitting device (100), and the light shielding portion (5) is configured to at least partially shield the light source (1) and the light guide element. The present invention also provides a motor vehicle including the lighting device. With the light emitting device for a motor vehicle of the present invention, richer modeling designs can be provided, the light source and its electrical components can be hidden, and the aesthetics can be improved.

Description

Lighting device for motor vehicle and motor vehicle

technical field

The present invention relates to the technical field of motor vehicles and lighting devices, and in particular, to a lighting device for motor vehicles and a motor vehicle including the lighting device.

Background technique

Lighting devices of motor vehicles include various lighting and/or signaling devices, such as vehicle headlights, fog lights, turn signals, brake lights, position lights, daytime running lights, and the like. In order to obtain a luminous effect, usually, the inner lens is placed directly in front of the light source (eg LED), however, this leads to limited styling, and in today's increasingly developed motor vehicles, the personalization of lighting and/or signaling devices There are more and more needs for styling design, so solutions that enrich the styling design of headlights are needed.

For the aforementioned solution in which the inner lens is directly arranged in front of the light source, the light source and its electrical components are directly viewed by the user, which is easy to cause dazzling on the one hand, and affects the aesthetics of the light-emitting device on the other hand. In addition, the uniformity of light emission of such a light-emitting device is poor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to at least partially overcome the defects of the prior art, and to provide a light-emitting device for a motor vehicle that is suitable for richer styling designs.

Another object of the present invention is to provide a lighting device for a motor vehicle with improved aesthetics.

Another object of the present invention is to provide a lighting device for motor vehicles with more uniform lighting and better visual effects.

In order to achieve the above-mentioned purpose or one of the purposes, the technical solution of the present invention is as follows:

A light emitting device for a motor vehicle, comprising a light source, the light emitting device further comprising a light guide element and a light shielding portion, the light guide element being configured to guide a light beam emitted by the light source to be emitted from the light emitting device, and the The light shielding portion is configured to at least partially shield the light source and the light guide element.

According to a preferred embodiment of the present invention, the light guide element includes a first light guide part and a second light guide part, the first light guide part is arranged adjacent to the light source, and the second light guide part is along the light beam The propagation path is arranged in front of the first light guide part,

Wherein, the cross-sectional area of the second light guide portion perpendicular to the light beam propagation path is smaller than the cross-sectional area of the first light guide portion perpendicular to the light beam propagation path, and

The second light guide portion is sandwiched between the light shielding portion and the housing of the light emitting device in a form-fitting manner.

According to a preferred embodiment of the present invention, the first light guide portion and/or the second light guide portion has a cross-sectional area perpendicular to the light beam propagation path that gradually narrows along the light beam propagation path.

According to a preferred embodiment of the present invention, the light shielding portion has an extension portion extending along the outer surface of the second light guiding portion, so that at least part of the side surface of the second light guiding portion is shielded by the light shielding portion.

According to a preferred embodiment of the present invention, the first light guide portion has a first light incident surface and a first light exit surface opposite to the first light incident surface, the first light incident surface is a concave surface forming an inner concave portion, and the The light source is accommodated in or adjacent to the inner recess.

According to a preferred embodiment of the present invention, the first light guide part has a first light incident surface, a first light emitting surface and a reflective surface, the reflective surface is opposite to the first light emitting surface, and the first light incident surface is located on the reflective surface and the side of the first light-emitting surface, and the light source faces the first light-incident surface.

According to a preferred embodiment of the present invention, the second light guide portion has a second light incident surface and a second light exit surface opposite to the second light incident surface, wherein the second light incident surface and the first light exit surface face each other .

According to a preferred embodiment of the present invention, a light diffusing structure is provided on the second light emitting surface for diffusing the light beams emitted through the second light emitting surface.

According to a preferred embodiment of the present invention, the extension portion of the light shielding portion extending along the outer surface of the second light guide portion extends to the second light emitting surface of the second light guide portion.

According to a preferred embodiment of the present invention, the first light guide portion and the second light guide portion are configured as elements independent of each other.

According to a preferred embodiment of the present invention, the first light guide portion and the second light guide portion are configured as integrally formed elements connected together by a connecting portion.

According to another aspect of the present invention, there is provided a motor vehicle comprising the lighting device for a motor vehicle according to any one of the preceding embodiments.

According to the light emitting device for a motor vehicle provided by an embodiment of the present invention, a first light guide portion and a second light guide portion are provided on the propagation path of the light beam, and the first light guide portion has a larger cross section than the second light guide portion Therefore, a combination of a thick-walled light guide and a thin-walled light guide (or an inner lens) is formed. Such a combination enables the light guide element to have a narrowed or gradually narrowed cross-sectional area along the propagation path of the light beam. With a light-shielding portion extending along the outer surface of the second light-guiding portion, such a design allows the light source and its electrical components as well as the first light-guiding portion to be hidden in a simple manner, so that external observers will not be dazzled by the light beam emitted by the light source , and no redundant components will be seen, which ensures the aesthetics of the light-emitting device. Moreover, this light-emitting device can be applied to more vehicle lamp shapes.

In addition, a light diffusion structure is arranged on the light incident surface, light exit surface, and reflection surface (especially the second light exit surface), so that the light beam is more uniform, and the intensity of the light beam emitted by the second light exit surface seen by external observers is consistent, and from different The viewing angle is also consistent in brightness, so the visual effect is better.

Description of drawings

FIG. 1 is a schematic diagram of a lighting device for a motor vehicle according to a first embodiment of the present invention;

2 is a light path diagram of a light emitting device for a motor vehicle according to a first embodiment of the present invention;

Fig. 3 is the enlarged view of area A in Fig. 1;

4 is a schematic diagram of a lighting device for a motor vehicle according to a second embodiment of the present invention;

5 is a schematic diagram of a lighting device for a motor vehicle according to a third embodiment of the present invention;

6 is a schematic diagram of a lighting device for a motor vehicle according to a fourth embodiment of the present invention;

7 is a schematic diagram of a first example of a light diffusing structure according to the present invention;

8 is a schematic diagram of a second example of a light diffusing structure according to the present invention; and

9 is a schematic diagram of a third example of a light diffusing structure according to the present invention.

Detailed ways

Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements. Furthermore, in the following detailed description, for convenience of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. Obviously, however, one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagram form in order to simplify the drawings.

According to the general inventive concept of the present invention, there is provided a light emitting device for a motor vehicle, including a light source, the light emitting device further comprising a light guide member and a light shielding portion, the light guide member being configured to guide light emitted by the light source The light beam is emitted from the light-emitting device, and the light shielding portion is configured to at least partially shield the light source and the light guide element; the light guide element includes a first light guide portion and a second light guide portion, the first light guide portion The second light guide portion is arranged adjacent to the light source, and the second light guide portion is arranged in front of the first light guide portion along the light beam propagation path, wherein the cross-sectional area of the second light guide portion perpendicular to the light beam propagation path is smaller than that of the first light guide portion The cross-sectional area of the portion perpendicular to the light beam propagation path, and the second light guide portion is sandwiched between the light shielding portion and the housing of the light emitting device in a form-fitting manner.

FIG. 1 shows a lighting device for a motor vehicle according to a first embodiment of the present invention. As shown in FIG. 1 , a lighting device 100 for a motor vehicle includes a light source 1 , a first light guide 2 , a second light guide The light guide part 3 , the casing 4 and the light shielding part 5 . Wherein, the light source 1 can be an LED light source, a halogen bulb and other light sources known in the prior art, and can be a point light source, a line light source or a light source array, and the light source 1 and its electrical components (not shown) are arranged and fixed on the light-emitting device In 100, the first light guide portion 2 is arranged adjacent to the light source 1, and the second light guide portion 3 is arranged in front of the first light guide portion 2 along the light beam propagation path. The two light guide parts 3 are configured to guide the light beam B emitted by the light source 1 to exit from the light emitting device 100 . The casing 4 is used to accommodate and fix each element of the light-emitting device 100 , and the casing 4 may also exist in the form of a transition plate in the light-emitting device, so the casing in the present invention includes a transition plate.

In order to better hide the light source 1 and its electrical components, the cross-sectional area of the second light guide portion 3 perpendicular to the light beam propagation path is smaller than the cross-sectional area of the first light guide portion 2 perpendicular to the light beam propagation path. A light guide portion 2 and/or the second light guide portion 3 has a cross-sectional area perpendicular to the light beam propagation path that gradually narrows along the light beam propagation path. Alternatively, the first light guide portion 2 and/or the second light guide portion 3 may also have a cross-sectional area perpendicular to the light beam propagation path that decreases stepwise along the light beam propagation path. In the embodiment of FIG. 1 , the second light guide 3 is shown as having a cross-sectional area perpendicular to the beam propagation path that gradually narrows along the beam propagation path, wherein the upper surface of the second light guide 3 remains horizontal, while The lower surface of the second light guide portion 3 is gradually inclined upward from left to right. In the embodiment of FIG. 1 , the upper surface and the lower surface of the first light guide portion 2 are kept horizontal and parallel to each other, that is to say, the first light guide portion 2 has a substantially constant perpendicular to the light beam propagation path along the light beam propagation path. cross-sectional area.

The first light guide part 2 and the second light guide part 3 may be made of transparent glass, resin or plastic material, such as PC or PMMA (polymethyl methacrylate). The first light guide portion 2 is a thick-walled light guide, and the second light guide portion 3 is a thin-walled light guide or a flat light guide, which can be molded by injection molding. Wherein, the pressure holding time of the thick-walled light guide during injection molding is longer than that of the thin-walled light guide during injection molding.

Preferably, the second light guide portion 3 is sandwiched between the light shielding portion 5 and the housing 4 of the light emitting device 100 in a form-fitting manner, so that the light shielding portion 5 is configured to at least partially shield the light source 1 and the light guide element, the light shielding portion 5 has an extension extending along the outer surface of the second light guiding portion 3, so that at least part of the side surface of the second light guiding portion 3 is shielded by the light shielding portion 5. The extension portion extending along the outer surface of the second light guide portion 3 extends to the light exit surface of the second light guide portion 3 (ie, the second light exit surface 32 which will be described later). As shown in FIG. 1 , the light-shielding portion 5 also has a vertical section and a connecting section between the vertical section and the extending portion, and the upper surface of the second light-guiding portion 3 is parallel to the casing 4 (or the transition disk) and can be connected to the The housing 4 is in contact, and the lower surface of the second light guide portion 3 may be in contact with the extension portion. A first limiting portion 41 is provided on the housing 4, and a second limiting portion 51 is provided on the shading portion 5. The first limiting portion 41 and the second limiting portion 51 are used for positioning and supporting the second guide. Light part 3.

The light-shielding portion 5 can be formed of any material that can play a light-shielding role. Advantageously, it can be integrally formed with the same material as the housing 4 or the transition disk in the light-emitting device 100, and can be laid on the outer surface of the light-shielding portion 5. An anti-reflection coating is provided, and an anti-reflection coating is also provided on the outside of the housing 4 .

According to the light emitting device for a motor vehicle provided by an embodiment of the present invention, a first light guide portion and a second light guide portion are provided on the propagation path of the light beam, and the first light guide portion has a larger cross section than the second light guide portion Therefore, a combination of a thick-walled light guide and a thin-walled light guide (or an inner lens) is formed. Such a combination enables the light guide element to have a narrowed or gradually narrowed cross-sectional area along the propagation path of the light beam. With a light-shielding portion extending along the outer surface of the second light-guiding portion, such a design allows the light source and its electrical components as well as the first light-guiding portion to be hidden in a simple manner, so that external observers will not be dazzled by the light beam emitted by the light source , and no redundant components will be seen, which ensures the aesthetics of the light-emitting device. Moreover, this light-emitting device can be applied to more vehicle lamp shapes.

In the embodiment of FIG. 1 , the first light guide portion 2 has a first light incident surface 21 , a first light exit surface 22 and a reflection surface 23 . The reflection surface 23 is opposite to the first light exit surface 22 . The light surface 21 is located beside the reflection surface 23 and the first light exit surface 22 , and the light source 1 faces the first light incident surface 21 . The second light guide portion 3 has a second light incident surface 31 and a second light emitting surface 32 opposite to the second light incident surface 31 , wherein the second light incident surface 31 and the first light emitting surface 22 face each other. From the perspective of FIG. 1 , the light source 1 is arranged on the lower side of the first light guide portion 2 , and the first light guide portion 2 and the second light guide portion 3 are arranged in front of each other. It should be noted that, since the shading part 5 includes an extension part, a vertical section and a connecting section between the vertical section and the extension part, the shading part 5 can completely block the light source 1 and the first light guide part 2 arranged up and down, so that they cannot be observed from the outside.

The light beam propagation path of the light emitting device for a motor vehicle according to the first embodiment of the present invention will be described below with reference to FIG. 2 . First, the light source 1 emits light beam B toward the first light incident surface 21 , the light beam B is refracted by the first light incident surface 21 and then enters the first light guide portion 2 and is directed to the reflective surface 23 , and then the light beam B is reflected by the reflective surface 23 to the first light guide portion 23 . At the light exit surface 22 , the light beam B is refracted on the first light exit surface 22 , and then goes toward the second light incident surface 31 and enters the second light guide portion 3 , and then the light beam B exits on the second light exit surface 32 .

As an example, the reflective surface 23 may have an outwardly convex convex surface, so that the light beam B incident on the reflective surface 23 will have a certain converging effect on the reflective surface 23, so the divergent (non-parallel) light emitted by the point-shaped light source 1 The light beam can be converted into a parallel light beam by the reflection of the reflection surface 23 .

In the first embodiment, the second light emitting surface 32 is provided with a light diffusing structure 33 , as shown in FIG. 3 , for diffusing the light beams emitted through the second light emitting surface 32 . Additionally, the light diffusing structure 33 may also be disposed on the first light incident surface 21 , the first light exit surface 22 , the reflection surface 23 , and the second light incident surface 31 .

A light diffusion structure is arranged on the light incident surface, light exit surface, and reflection surface (especially the second light exit surface), so that the light beam is more uniform, and the intensity of the light beam emitted by the second light exit surface seen by external observers is consistent, and it can be observed from different angles. Brightness is also consistent, so the visuals are better.

In order to change the cross section of the light guide element, the first embodiment adopts the scheme of combining the first light guide part 2 and the second light guide part 3. Further, the light guide element may also include a third light guide part, so The third light guide portion is arranged between the first light guide portion 2 and the second light guide portion 3, and the cross-sectional area of the third light guide portion perpendicular to the beam propagation path is larger than that of the second light guide portion perpendicular to the beam propagation path. The cross-sectional area of the path is smaller than the cross-sectional area of the first light guide portion 2 perpendicular to the beam propagation path, that is to say, the change of the cross-section of the light guide element can be realized through the three light guide portions. In this way, it is possible to achieve A larger change ratio of cross-sectional area, so a richer modeling design can be achieved, and the area at the light-emitting surface of the light-emitting device (ie, the second light-emitting surface 32 of the second light guide portion 3) can be smaller, and even lines can be formed luminous pattern. Similarly, the third light guide portion may have a cross-sectional area perpendicular to the light beam propagation path that gradually narrows along the light beam propagation path, or the third light guide portion may also have a stepwise decrease along the light beam propagation path The cross-sectional area perpendicular to the beam propagation path.

Further, in the first embodiment of the present invention, a reflective layer is provided on and only on the portion of the housing 4 located between the first light guide portion 2 and the second light guide portion 3 to avoid light loss, so that The portion of the light beam emitted from the first light exit surface 22 that strikes the casing 4 can be reflected to the second light incident surface 31 of the second light guide portion 3 .

4 is a schematic diagram of a light-emitting device for a motor vehicle according to a second embodiment of the present invention, which shows a technical solution different from that of the first embodiment of the present invention, the difference is that the first light guide The part 2 has a first light incident surface 21 and a first light exit surface 22 opposite to the first light incident surface 21, the first light incident surface 21 is a concave surface forming an inner recess, and the light source 1 is accommodated in the inner recess or arranged adjacent to the inner recess. The concave surface of the first light incident surface 21 gathers the light beams emitted by the light source 1 to improve the light efficiency.

Further, a light collimator may also be included between the light source 1 and the first light guide portion 2 for collimating the light beam B emitted by the light source 1 . The arrangement of the light collimator can play the role of expanding the light emitting area of the light source 1. For example, when the light source 1 is a point light source, the light collimator can convert it into a surface light source. This is beneficial for the light beam to enter the first light guide portion 2 and improves the light utilization efficiency. As an example, the light collimator 50 may be a lens or any suitable device in the art capable of achieving optical collimation.

5 is a schematic diagram of a light emitting device for a motor vehicle according to a third embodiment of the present invention. In the first embodiment shown in FIG. 1 , the first light guide portion 2 and the second light guide portion 3 are configured as elements independent of each other. In contrast, in the third embodiment, the first light guide portion 2 and the second light guide portion 3 are configured as integrally formed elements connected together by a connecting portion 6 . The connecting portion 6 may be in the shape of a plate or a bar, and its cross-sectional area perpendicular to the light beam propagation path is significantly smaller than the cross-sectional areas of the first light guide portion 2 and the second light guide portion 3 perpendicular to the light beam propagation path. In this way, a gap is formed between the first light guide portion 2 and the second light guide portion 3 to form two refractions on the first light exit surface 22 and the second light entrance surface 31 .

Further, a reflective layer may be provided on the upper surface of the connecting portion 6, in this way, the portion of the light beam emitted from the first light exit surface 22 that strikes the upper surface of the connecting portion 6 can be reflected to the second light guide portion 3 on the second light incident surface 31 to avoid light loss. The connecting portion 6 may also be configured with a plurality of through holes or slots to reduce weight.

Alternatively, the first light guide portion 2 and the second light guide portion 3 may also be connected to each other in other ways known in the prior art.

6 is a schematic diagram of a light emitting device for a motor vehicle according to a fourth embodiment of the present invention. In the fourth embodiment, the second light guide portion 3 is configured to have a hollow portion 35 that opens toward the first light exit surface 22 of the first light guide portion 2 , and the inner wall of the hollow portion 35 forms the second light incident surface 31 . The second light guide portion 3 includes an extension portion 34 extending downward from the lower surface of the second light guide portion 3 . The extension portion 34 can cooperate with the corresponding element of the light shielding portion 5 to fix the second light guide portion 3 . Using the second light guide portion 3 in this form can also achieve the effect of the present invention.

7-9 respectively show schematic diagrams of the first example, the second example and the third example of the light diffusing structure of the present invention. In the first example, the light diffusing structure 33 is a plurality of convex strips parallel to each other, alternatively, it can also be a concave strip; in the second example, the light diffusing structure 33 is a plurality of square protrusions arranged in a matrix form, instead of ground, can also be a concave block; in the third example, the light diffusing structure 33 is a plurality of circular protrusions arranged in a matrix form, alternatively, can also be a pit. Using the microstructures shown in Figures 7-9, the emitted light beam can be made more uniform.

According to another aspect of the present invention, there is provided a motor vehicle comprising the lighting device 100 for a motor vehicle according to any one of the preceding embodiments.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that changes may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of applicability of the present invention is defined by the appended claims and their equivalents.

List of reference numbers:

100 light-emitting devices

1 light source

2 The first light guide

3 The second light guide

4 shells

5 shades

6 connections

21 The first light incident surface

22 The first light-emitting surface

23 reflective surfaces

31 The second light incident surface

32 Second light-emitting surface

33 Light Diffusion Structure

34 Extensions

35 hollow part

41 The first limit part

51 Second limit part

B beam.

Claims (12)

1. A light-emitting device (100) for a motor vehicle, comprising a light source (1), characterized in that: the light-emitting device (100) further comprises a light guide element and a light shielding portion (5), the light guide element being The light beam (B) emitted by the light source (1) is configured to be guided out of the light emitting device (100), and the light shielding portion (5) is configured to at least partially shield the light source (1) and the light guide element. 2. The light-emitting device (100) for a motor vehicle according to claim 1, wherein the light guide element comprises a first light guide part (2) and a second light guide part (3), the The first light guide portion (2) is arranged adjacent to the light source (1), and the second light guide portion (3) is arranged in front of the first light guide portion (2) along the light beam propagation path, Wherein, the cross-sectional area of the second light guide portion (3) perpendicular to the light beam propagation path is smaller than the cross-sectional area of the first light guide portion (2) perpendicular to the light beam propagation path, and The second light guide portion (3) is sandwiched between the light shielding portion (5) and the housing (4) of the light emitting device (100) in a form-fitting manner. 3. The light-emitting device (100) for a motor vehicle according to claim 2, characterized in that: the first light guide portion (2) and/or the second light guide portion (3) have along the light beam The propagation path is the cross-sectional area perpendicular to the propagation path of the beam that is tapered. 4. The light-emitting device (100) for a motor vehicle according to claim 3, wherein the light shielding portion (5) has an extension portion extending along the outer surface of the second light guide portion (3), such that At least part of the side surface of the second light guide portion (3) is shielded by the light shielding portion (5). 5. The light-emitting device (100) for a motor vehicle according to claim 4, wherein the first light guide portion (2) has a first light incident surface (21) and a first light incident surface (21) The opposite first light-emitting surface (22), the first light-incident surface (21) is a concave surface forming a concave portion, and the light source (1) is accommodated in the concave portion or arranged adjacent to the concave portion . 6. The light-emitting device (100) for a motor vehicle according to claim 4, wherein the first light guide portion (2) has a first light incident surface (21) and a first light exit surface (22). ) and a reflective surface (23), the reflective surface (23) is opposite to the first light-emitting surface (22), and the first light-incident surface (21) is located beside the reflective surface (23) and the first light-emitting surface (22) , and the light source (1) faces the first light incident surface (21). 7. The light-emitting device (100) for a motor vehicle according to claim 6, wherein the second light guide portion (3) has a second light incident surface (31) and a second light incident surface (31) Opposing second light-emitting surfaces (32), wherein the second light-incident surface (31) and the first light-emitting surface (22) face each other. 8. The light-emitting device (100) for a motor vehicle according to claim 7, wherein a light diffusing structure (33) is provided on the second light-emitting surface (32) for illuminating the second light-emitting surface (32). The light beam emitted from the light emitting surface (32) is diffused. 9. The light-emitting device (100) for a motor vehicle according to claim 7, wherein the extension portion of the light shielding portion (5) extending along the outer surface of the second light guide portion (3) extends to the second The second light emitting surface (32) of the light guide part (3). 10. The light-emitting device (100) for a motor vehicle according to any one of claims 2 to 9, wherein the first light guide portion (2) and the second light guide portion (3) are Constructed as elements independent of each other. 11. The light-emitting device (100) for a motor vehicle according to any one of claims 2 to 9, wherein the first light guide portion (2) and the second light guide portion (3) are Constructed as integrally formed elements connected together by connecting portions (6). 12. A motor vehicle, characterized in that the motor vehicle comprises a lighting device (100) for a motor vehicle according to any one of claims 1 to 11.