CN110208894A - Light guide member for car light, the car light for motor vehicles and motor vehicles - Google Patents

Abstract

The present invention provides a kind of light guide members, car light and motor vehicles for car light.The light guide member includes: light incident section, and the smooth incidence position is arranged to receive incident beam in the first end of light guide member；Light-emitting face, the light-emitting face are located at the second end opposite with first end of light guide member；And mutually back to first side and second side, the first side and second side extend between the first end and the second end, being arranged with reflection will guide from the light of light incident section incidence towards the light-emitting face, wherein, photodissociation coupling region is provided at least one of the first side and second side, photodissociation coupling region is arranged to the space for facing a part of light beam from corresponding side to the second end of light guide member outgoing.

Description

Light guide member for vehicle lamp, vehicle lamp for motor vehicle and motor vehicle

technical field

The invention relates to a light guide for a vehicle lamp, a vehicle lamp for a motor vehicle and a motor vehicle.

Background technique

Lighting is an important component of motor vehicles. Car lights can provide lighting functions for motor vehicles, such as low beams, high beams, fog lights, etc., and can also provide signal indication functions for motor vehicles, such as position lights, brake lights, etc. Traffic rules and industry norms have clear requirements for the light intensity distribution of the light beams emitted by various vehicle lights. Therefore, the outgoing light beam of the car light needs to be adjusted by the optical system before leaving the car light.

In the current car lights, it is often difficult to meet the requirements of the visible range and light intensity distribution of the outgoing beam of the car lights only through the flat light guide, and it is necessary to additionally set a prism outside the light guide to rearrange the light emitted from the light guide. Modulation can form the outgoing beam of the car lamp that meets the requirements. On the one hand, this leads to a complex structure, and on the other hand, the additional prism may also cause adverse effects on the lighting effect of the vehicle lamp.

Contents of the invention

The object of the present invention is to provide a light guide component for vehicle lamps, which can be used to improve the visible range of the outgoing light beam of the light guide component.

It is also an object of the present invention to provide a vehicle lamp and a motor vehicle comprising the above-mentioned light guide member.

The present invention provides a light guide component for vehicle lamps, comprising: a light incident part, the light incident part is located at the first end of the light guide part, arranged to receive an incident light beam; a light exit surface, the light exit surface is located at a second end of the light guide member opposite to the first end; and first and second sides facing away from each other, the first and second sides being between the first and second ends extending between them, arranged to guide the light incident from the light incident portion towards the light exit surface by reflection, wherein a light decoupling area is provided on at least one of the first side and the second side, the The light decoupling regions are arranged such that a part of the light beam emerges from the corresponding side to the space facing the second end of the light guide part.

In an embodiment, the optical decoupling region is closer to the second end than to the first end.

In one embodiment, the optical decoupling region is adjacent to the second end.

In an embodiment, an optical decoupling structure is disposed in the optical decoupling region.

In an embodiment, the light decoupling structure includes a plurality of protrusions or depressions.

In an embodiment, the optical decoupling structures are distributed in the optical decoupling area in the form of dots.

In an embodiment, the optical decoupling region is provided on both the first side and the second side.

In an embodiment, the light guide component further includes a third side and a fourth side extending between the first side and the second side and facing away from each other, and on the third side and the fourth side are also provided the opto-decoupling region.

In one embodiment, the light incident part includes: a light collimating part arranged to collimate the incident light beam; and a light reflecting surface arranged to collimate the incident beam The light beam is reflected toward at least one of the first side and the second side.

In one embodiment, a plurality of prisms arranged in parallel are provided on the light reflecting surface.

In an embodiment, the light emitting surface is provided with a light distribution portion for adjusting the light intensity distribution of the outgoing light, such as light distribution protrusions or depressions.

The present invention also provides a lamp for a motor vehicle, comprising: a light source; and the light guide member according to any one of the above embodiments, wherein the light incident portion is configured to receive an incident light beam emitted from the light source.

The vehicular lamp further includes a shielding member arranged to shield the rest of the light guide member except the light exit surface and the light decoupling region.

The invention also provides a motor vehicle comprising a light guide according to the above or a vehicle light according to the above.

A light guide component according to an embodiment of the present invention is provided with a light decoupling region on at least one side thereof. By means of the light decoupling area, the light output area of the light guide component can be enlarged and the visible range of the output light beam and the lighting effect can be improved.

Description of drawings

Fig. 1 schematically shows a perspective view of a section of a light guiding component according to an embodiment of the present invention;

Fig. 2, Fig. 3 and Fig. 4 schematically show a side view of a section of a light guide component according to an embodiment of the present invention and related optical paths;

Figure 5 schematically shows a front view of a section of a light guiding component according to an embodiment of the present invention;

Figure 6 and Figure 7 schematically show the light decoupling region and the related light path diagram on a section of the light guiding component according to an embodiment of the present invention;

Fig. 8, Fig. 9 and Fig. 10 schematically show a top view and a related optical path diagram of a section of a light guide component according to an embodiment of the present invention;

Figures 11 and 12 schematically illustrate a top view and a perspective view, respectively, of a light guiding component according to an embodiment of the present invention; and

Fig. 13 schematically shows a view in which a light guide part is blocked by a blocking part according to an embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same reference numerals denote components with the same or similar functions. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, and should not be construed as a limitation of the present invention.

In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.

1 to 5 schematically illustrate a section of a light guiding component 100 according to an embodiment of the present invention. In the drawings, light is represented by dashed lines. The light guide member 100 may include a light incident part 10 , a light exit surface 20 , a first side 30 and a second side 40 . It can be clearly seen from FIGS. 1 to 4 that the light incident portion 10 and the light exiting surface 20 are respectively located at two opposite ends of the light guide component 100 . For convenience of description, hereinafter, the end where the light incident portion 10 is located is referred to as the first end, and the end where the light exiting surface 20 is located is referred to as the second end. The light entrance part 10 is arranged for receiving an incident light beam 61 . The incident light beam 61 can eg be emitted from the light source 60 . The first side 30 and the second side 40 are arranged opposite to each other, and extend between the first end and the second end, and are arranged to use reflection (such as total reflection) to emit the light incident from the light incident part 10 toward the light output. Face 20 guides. As shown in FIG. 1 , an optical decoupling region 31 is disposed on the first side 30 . The light decoupling area 31 is arranged so that a part of the light beam is directed from at least one of the first side 30 and the second side 40 to the space facing the second end of the light guide member 100 (ie towards the second end of the light guide member 100 ). The front of the two ends) emits (in Fig. 2 to Fig. 4, it emits toward the left-hand side).

The term "light guide member" refers to a light guide device that transmits light therein mainly by total reflection. It can have various shapes, such as cylindrical (can be called light guide rod), strip (can be called light guide bar, light bar), plate shape (can be called light guide plate), ring shape (can be called light guide halo) and so on. Since the total reflection method is mainly used for transmission, the optical efficiency of the light guide part is high and the light loss is small.

The function of the light decoupling region 31 is to destroy the total reflection condition of the light beam in the light guide component 100 by changing the structure (such as forming protrusions or depressions), so that the light in the light guide component 100 can exit from a designated position. The above-mentioned effect of the light decoupling region 31 can be called the light decoupling effect. The optical decoupling effect of the optical decoupling region 31 can be realized by a plurality of optical decoupling structures 32 arranged on the optical decoupling region 31 . The light decoupling structure 32 can also be arranged to reflect the light beam incident from the light incident surface 10 to the other side of the light guide component (such as the second side 40 or the first side 30) so that the light beam reflected by the light decoupling structure 32 A light beam can emerge from the light guide. However, the light decoupling structure 32 may be arranged such that a part of the light beam irradiated on the light decoupling structure 32 is directly emitted from the side of the light guiding component 100 where the light decoupling region 31 is located by refraction.

Figures 2 to 4 schematically show three beam exit paths respectively. In FIG. 2 , it is shown that part of the incident light beam is reflected by the first side surface 30 and the second side surface 40 , and finally exits from the light emitting surface 20 . In FIG. 3 , it is shown that another part of the incident light beam is reflected by the light decoupling region 31 on the first side 30 toward the second side 40 , and finally exits from the second side 40 . In FIG. 4 , it is shown that another part of the incident light beam is directly emitted from the first side 30 under the refraction effect of the light decoupling region 31 located on the first side 30 .

It can be clearly seen from FIG. 2 to FIG. 4 that after the light decoupling region 31 is set, the light beam of the light guide component 100 can not only exit from the light exit surface 20, but also exit from at least one of the first side 30 and the second side 40. Part of one shoots out. This can increase the visible range of the outgoing light beam of the light guide member 100 . Moreover, since the inside of the light guide member 100 transmits light with total reflection, it is easy to achieve relatively uniform and continuous light intensity output. A good lighting effect can be observed. In the absence of the optical decoupling area 31, only the light emitting surface 20 is used to emit the light beam, the visible range of the outgoing light beam is easily limited and cannot meet the requirements of the car lamp specification, and it is often necessary to use other components (such as Additional prisms on the outer lens) to diffuse the beam. However, the light intensity distribution of the light beam with a relatively narrow visible range may not be as uniform as the light beam directly emitted by the light guide component 100 after being expanded by such an additional prism, and therefore, the lighting effect will also be affected. It can be seen that, in the embodiment of the present invention, with the help of the light decoupling region 31, not only can the visible range of the outgoing light beam of the light guide component 100 be improved, but also the use of additional prisms on additional components can be avoided to simplify the lamp structure And improve the lighting effect of the headlights.

As an example, the light decoupling region 31 may be disposed only on the first side 30 or the second side 40 , or may be disposed on both the first side 30 and the second side 40 at the same time. The light decoupling region 31 disposed on the first side 30 and the second side 40 can expand the visible range of the outgoing light beam of the light guide component 100 in the first direction x (eg, a direction substantially perpendicular to the first side 30 ).

As an example, the first side 30 and the second side 40 may be parallel to each other. However, the embodiment of the present invention is not limited thereto, and the first side 30 and the second side 40 may also be non-parallel, such as forming a certain inclination angle with each other.

In an example, the light guide component 100 further includes a third side 50 and a fourth side 51 extending between the first side 30 and the second side 40 and facing away from each other. As shown in FIGS. 8 to 10 , the third side 50 and the fourth side 51 can also guide the incident light beam toward the second end of the light guide component 100 by reflection. As an example, the light decoupling region 31 may also be provided on the third side 50 and the fourth side 51 . The light decoupling region 31 provided on the third side 50 and the fourth side 51 can expand the output light beam of the light guide component 100 in a second direction v perpendicular to the first direction (for example, a direction approximately parallel to the first side). Visible range. As an example, the light decoupling region 31 may form a band-like region around the second end of the light guiding component 100 across the first side 30 , the second side 40 , the third side 50 and the fourth side 51 . This makes the emitted light intensity around the second end of the light guide component 100 uniform in all directions, which helps to improve the lighting effect.

As an example, the light guide component 100 may be a flat light guide, ie the surface area of the first side 30 and the second side 40 is larger than the surface area of the third side 50 and the fourth side 51 .

In an embodiment of the present invention, the light decoupling region 31 may be disposed closer to the second end of the light guide part 100 than to the first end of the light guide part 100 . This helps to improve optical efficiency. For example, the light decoupling region 31 may be adjacent to the second end of the light guiding component 100 . This is beneficial to control the area on the first side 30 and the second side 40 of the light guide member 100 near the light exit surface 20, which can better concentrate the intensity of the outgoing light beam on the area in front of the light exit surface 20, and also facilitates Improve lighting effects.

As mentioned above, an optical decoupling structure 32 may be disposed in the optical decoupling region 31 . An exemplary optical decoupling structure 32 is shown in FIGS. 6 and 7 . The optical decoupling structure 32 may include a plurality of optical microstructures of various shapes, for example, having outer surfaces in shapes such as conical surfaces, spherical surfaces, ellipsoidal surfaces, triangular pyramidal surfaces, and pentagonal pyramidal surfaces. In one embodiment, the optical microstructure may be in the form of protrusions or depressions. This is beneficial to change the angle of reflection or refraction of the light irradiated on the decoupling structure 32 so that the light exits from the first side 30 or the second side 40 at a designated position. As an example, the light decoupling structures 32 may be distributed in the light decoupling region 31 in the form of dots. As shown in Figures 6 and 7, each optical microstructure in the optical decoupling structure 32 is distributed in the form of dots in the optical decoupling area 31, and each optical microstructure can be regarded as a point in the optical decoupling area 31 . The distribution in the form of dots is beneficial for the light guide component 100 to obtain a more uniform outgoing light intensity. As an example, the optical decoupling region 31 where the optical decoupling structure 32 is located may be in various shapes, such as bar-shaped, circular, fan-shaped, and so on.

In an embodiment of the present invention, the light incident part 10 may include a light collimating part 11 and a light reflecting surface 12 . The light collimating part 11 is arranged to collimate the incident light beam so that more energy of the light beam enters the light guiding component 100 . As an example, the light collimating part 11 may include a transmission collimating part 13 located inside the light collimating part 11 and a total reflection collimating part 14 located outside the light collimating part 11 . The transmissive collimator 13 can have, for example, a convex lens surface shape, and can be used to collimate the central part of the incident light beam. The total reflection collimating part 14 is provided with a total reflection surface 15 through which the peripheral part of the incident light beam can be collimated. This structure can improve the optical coupling efficiency of the incident beam. The light reflecting surface 12 is arranged to reflect the collimated incident light beam towards the first side 30 and/or the second side 40 . The light reflection surface 12 can adjust the light intensity distribution of the light beam entering the light incident part 10. For example, the light reflection surface 12 can be provided with a plurality of prisms 16 arranged in parallel, which makes the light reflected by the light reflection surface 12 not only It can be reflected on the first side 30 and the second side 40 , and can also be reflected on other sides of the light guide component 100 (such as the third side 50 and the fourth side 51 ), as shown in FIGS. 8-10 . This is beneficial, for example, to improve the uniformity of light intensity and the spread angle range of the outgoing light beam of the light guide component 100 .

In an embodiment of the present invention, the light exit surface 20 may be provided with a plurality of light distribution parts 21 for adjusting the light intensity distribution of the exit light. The light distribution unit 21 can adjust the light intensity distribution of the outgoing light beam to a desired distribution. For example, the light intensity distribution can be made more uniform, and the light intensity distribution at different distances from the light exit surface 20 can also be adjusted to meet the requirements of motor vehicle lamp specifications (such as Chinese national standards, EU standards, etc.). For example, the surface shape of the light distribution part 21 may be a convex shape or a concave shape. It should be noted that, when the surface shape of the light distribution part 21 is convex, due to its optical properties, it may first converge the light beam, but when the converged light beam passes through the converging point, it will also become a divergent light beam, thereby also The effect of spreading the light beam can be achieved. The specific parameters of the light distribution part 21 may depend on the design requirements of different functions of the vehicle lights. For the design requirements of the different functions of the vehicle lights, please refer to relevant technical specifications in the field, and will not be repeated here. The converging or diverging effect of the light distribution part 21 on the light beam part can be realized by the refraction of the light beam part on the surface of the light distribution part 21 .

In the light guide part 100 shown in Figures 1 to 10, the light guide part 100 is shown as a long strip as a whole, however, embodiments of the present invention are not limited thereto, and the light guide part can be designed according to the internal space structure of a vehicle lamp, for example into various shapes. 11 and 12 illustrate a light guide member 100' according to an embodiment of the present invention. The light guide component 100' can be regarded as a plurality of component units of different lengths formed side by side, wherein the structure of each component unit is similar to the light guide component 100 shown in Figures 1 to 10 . As an example, a plurality of light collimating parts 11 and light reflecting surfaces 12 may also be provided correspondingly in the light guide component 100'.

In an embodiment of the present invention, the light guide member 100, 100' can be, for example, a solid structure, for example, it can be made of light-transmitting materials such as resin and plastic, for example, it can be made of polycarbonate or polymethyl methacrylate, But the embodiments of the present invention are not limited thereto.

Embodiments of the present invention also provide a lamp for a motor vehicle. The vehicle lamp comprises: a light source 60 and the light guide components 100, 100' as described in any one of the above-mentioned embodiments. The light incident part 10 is used for receiving the incident light beam 61 emitted from the light source 60 . As mentioned above, in this vehicle light, the requirements of the visible range and light intensity of the light beam emitted by the light guide member 100, 100' can be met directly by directly using the light beam emitted by the light guide member 100, 100'. In one example, the light source 60 may include a light emitting diode light source or other light sources known in the art. As an example, the light source 60 may be arranged facing the light incident part 10 . In the case of using multiple light sources, the multiple light sources can also be arranged in an array.

In an embodiment of the present invention, the light guide component 100, 100' may include one light incident portion 10, two light incident portions 10, or more light incident portions 10, for example, may be disposed at the first end of the light guide component 100 A plurality of separate light incident portions 10 .

In an embodiment of the present invention, as shown in FIG. 13 , the vehicle light may further include a shielding component 80 . The shielding member 80 is arranged to shield the rest of the light guide member 100, 100' except the light exit face 20 and the light decoupling region 31. This can suppress the influence of stray light on the outgoing light beam of the vehicle lamp. The shielding part 80 can also serve other functions in the vehicle light, such as a supporting part and the like. In this arrangement, only the light emitting surface 20 and the light decoupling region 31 of the light guide components 100, 100' need to be exposed, without exposing the entire light guide components, which is also beneficial to the spatial structure design of the vehicle lamp. .

Vehicle lights according to embodiments of the present invention may include, for example, any type of motor vehicle lighting and/or signal lights, such as headlights, fog lights, center high mounted stop lights, turn signals, position lights, rear brake lights, and the like.

Embodiments of the present invention also provide a motor vehicle, comprising the light guide member 100, 100' as described in any of the above embodiments or the vehicle lamp as described in any of the above embodiments.

Although the present invention has been described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation of the present invention. The size ratios in the drawings are only schematic and should not be construed as limiting the present invention.

While certain embodiments of the present general inventive concept have been shown and described, those of ordinary skill in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept. The scope is defined by the claims and their equivalents.

Claims (13)

1. a kind of light guide member (100,100 ') for car light, comprising:

Light incident section (10), the smooth incident section (10) are located at the first end of light guide member (100,100 '), are arranged to receive Incident beam (61)；

Light-emitting face (20), the light-emitting face (20) are located at second opposite with first end of light guide member (100,100 ') End；And

Mutually back to first side (30) and second side (40), the first side (30) and second side (40) are described Extend between first end and the second end, be arranged with reflection will be from the light of smooth incident section (10) incidence described in Light-emitting face (20) guidance,

Wherein, photodissociation coupling region (31) is provided at least one of the first side (30) and second side (40), Photodissociation coupling region (31) is arranged to make a part of light beam from corresponding side to the light guide member (100,100 ') The space outgoing that the second end is faced.

2. light guide member (100,100 ') according to claim 1, wherein photodissociation coupling region (31) is from described second End ratio is closer from the first end.

3. light guide member (100,100 ') according to claim 2, wherein photodissociation coupling region (31) and described second End is adjacent.

4. light guide member (100,100 ') according to claim 1, wherein be provided with light in photodissociation coupling region (31) Decoupling-structure (32).

5. light guide member (100,100 ') according to claim 4, wherein the smooth decoupling-structure (32) includes multiple convex It rises or is recessed.

6. light guide member (100,100 ') according to claim 4, wherein the smooth decoupling-structure (32) is in the form of site It is distributed in photodissociation coupling region (31).

7. light guide member (100,100 ') according to any one of claim 1 to 6, wherein in the first side (30) and in second side (40) it is respectively provided with photodissociation coupling region (31).

8. light guide member (100,100 ') according to claim 7, wherein the light guide member (100,100 ') further includes Third side (50) and the 4th side (51) extend between first side (30) and second side (40), away form one another, Photodissociation coupling region (31) is also provided on the third side (50) and the 4th side (51).

9. light guide member (100,100 ') according to any one of claim 1 to 6, wherein the smooth incident section (10) Include:

Light collimation portion (11), the smooth collimation portion (11) are arranged to collimate incident beam (61)；With

Light reflection surface (12), the light reflection surface (12) is arranged to will be by the incident beam (61) of collimation to first side (30) With the reflection of at least one of second side (40).

10. light guide member (100,100 ') according to claim 9, wherein the light reflection surface (12) is equipped with parallel Multiple prisms (16) of arrangement.

11. light guide member (100,100 ') according to any one of claim 1 to 6, wherein the light-emitting face (20) It is provided with the light distribution portion (21) of the light distribution for adjusting emergent light.

12. a kind of car light for motor vehicles, comprising:

Light source (60)；And

Light guide member (100,100 ') according to any one of claim 1 to 11,

Wherein, the smooth incident section (10) is used to receive the incident beam (61) issued from light source (60).

13. a kind of motor vehicles, including light guide member according to any one of claim 1 to 11 (100,100 ') or root According to the car light described in claim 12.