CN211260672U

CN211260672U - Optical system with light guide with fin-shaped structure

Info

Publication number: CN211260672U
Application number: CN201921752474.6U
Authority: CN
Inventors: 邵坤
Original assignee: Magneti Marelli Automotive Components Wuhu Co Ltd
Current assignee: Magneti Marelli Automotive Components Wuhu Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-08-14
Anticipated expiration: 2029-10-18

Abstract

The utility model provides an optical system with fin structure light guide, including LED light source module, have fin structure light guide, set up in the diffuse reflection chamber of fin structure inboard and set up the lens that has the optical diffusion effect in the light guide outside, LED light source module sets up the one end or both ends that have fin structure light guide, fin structure light guide has including the even luminous strip light guide, one side of strip light guide is provided with first light guide tooth, and the offside of first light guide tooth is provided with fin structure, and fin structure unilateral or two sides are provided with second light guide tooth, and fin structure's initiating position is provided with the internal reflection face. The LED lamp has high directivity, uses a small amount of LED particles, and is a low-cost optical system design scheme, so that the requirement of illuminating the shape of a semi-enclosed or protruding square car lamp is met, and the characteristic of high directivity of the strip-shaped light guide is utilized, and a special fin-shaped structure is combined to supplement a lateral illumination area, so that the uniform and attractive appearance illumination effect is achieved.

Description

Optical system with light guide with fin-shaped structure

Technical Field

The utility model relates to an automotive signal lamp and automotive lighting field especially relate to an optical system with fin-shaped structure light guide.

Background

With the increasing living standard of people, the demand for purchasing automobiles with beautiful appearance and excellent performance is gradually increased. The natural, dynamic, mysterious and personalized appearance shapes can attract more eyeballs of customers, and the requirements of the customers on the appearance of the automobile are met. The automobile lamp is used as a part of the expression of the automobile model and plays a key role in drawing the dragon point. The appearance and the light effect form of the lamp can give strong visual impact to consumers. In recent years, the design and modeling of the automobile tail lamp are more three-dimensional, and the light emitting surface of the lamp is gradually expanded to extend to the outer side of the tail box from the traditional layout right behind the tail part of the automobile. Thus forming a semi-enclosed form, even in the form of a somewhat convex square. The large area of the light emitting area gives the user a strong visual impact, but presents new challenges to the design of the optical system.

Aiming at new design requirements, at present, a plurality of LED light sources in an array are mainly adopted to directly irradiate a lens with a diffusion effect to illuminate a required area. However, the manufacturing cost is high due to the adoption of a large number of LED particles. Meanwhile, there is a proposal of using a diffuse reflection barrier as a surface light source lighting desired region as described in "transparent diffusion barrier and vehicular lamp using the same (CN 108136953 a)". However, the directivity of diffuse reflection is poor, so that the illumination requirement of national regulations on the automobile lamp is difficult to meet.

In view of the above problems, designing a new optical system having better directivity while using a small amount of LED particles is a key to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an optical system with fin structure light guide has high directive property, uses a small amount of LED granule simultaneously, low-cost optical system design to the demand that the car light of half encirclement or protrusion square form was moulded is illuminated in the realization, utilizes the characteristics of the high directive property of strip light guide, combines special fin structure, supplements the lateral illumination region, thereby reaches even, pleasing to the eye outward appearance illuminating effect.

The utility model provides an optical system with fin structure light guide, including LED light source module, have fin structure light guide, set up in the diffuse reflection chamber of fin structure inboard and set up the lens that has the optical diffusion effect in the light guide outside, LED light source module sets up the one end or both ends that have fin structure light guide, fin structure light guide has including the even luminous strip light guide, one side of strip light guide is provided with first light guide tooth, and the offside of first light guide tooth is provided with fin structure, and fin structure unilateral or two sides are provided with second light guide tooth, and fin structure's initiating position is provided with the internal reflection face.

A further improvement is that the diffuse reflecting cavity always has a portion of its surface opposite the second light guiding tooth.

The further improvement is that the fin-shaped structure with the fin-shaped structure light guide is divided into multiple ends, and the position and the number of the fin-shaped structures can be adjusted correspondingly according to different illumination areas. And the single side or the double sides of each fin-shaped structure are provided with second light guide teeth.

The light guide with the fin-shaped structure is further improved in that the section of the second light guide tooth is in a sawtooth shape and is sunken in or protruded out of the side face of the fin-shaped structure, the extending direction of the second light guide tooth is parallel to or perpendicular to the direction of light rays directly reflected by the first light guide tooth, and the energy emitted from the top surface of the fin-shaped structure is weakened through the light splitting effect of the second light guide tooth, so that the energy incident to the surface of the diffuse reflection cavity is increased, and the effect of adjusting the energy distribution is achieved.

The further improvement is that the second light guide tooth with the fin-shaped structure light guide is in a hemispherical shape and is sunken in or protruded out of the side face of the fin-shaped structure. The fin-shaped structure has the function of finely adjusting the proportion of the outgoing energy of the top surface of the fin-shaped structure to the outgoing energy of the side surface of the fin-shaped structure.

The light guide fin structure with the fin structure is further improved in that the pointing direction of the fin structure is the X-axis direction, or a certain included angle is formed between the pointing direction of the fin structure and the X-axis direction, so that the light reflected by the first light guide teeth can be ensured to have stronger directivity, and the uniformity of the illuminated effect of the semi-surrounding lens can be optimized by adjusting the included angle between the fin structure and the X-axis direction.

In a further improvement, the lens surface of the lens is provided with a dermatoglyph with an optical diffusion effect.

The further improvement is that the lens surface of the lens is provided with a grid-shaped pillow-shaped pattern with an optical diffusion effect.

In a further improvement, the lens material of the lens has optically diffusible fine particles dispersed therein.

The further improvement is that the light guide with the fin-shaped structure is made of polymethyl methacrylate or polycarbonate.

The teeth in the second light guide tooth extend in a direction perpendicular to the direction of light directly reflected by the first light guide tooth. The energy emitted from the top surface of the fin-shaped structure is weakened by the light splitting effect of the second light guide teeth, and the energy incident on the surface of the diffuse reflection cavity 3 is increased. Thereby achieving the effect of adjusting the energy distribution.

The utility model has the advantages that: the LED lamp has high directivity, uses a small amount of LED particles, and is a low-cost optical system design scheme, so that the requirement of illuminating the shape of a semi-enclosed or protruding square car lamp is met, and the characteristic of high directivity of the strip-shaped light guide is utilized, and a special fin-shaped structure is combined to supplement a lateral illumination area, so that the uniform and attractive appearance illumination effect is achieved. Through the design of the fin-shaped structure, the appearance of the vehicle lamp in a semi-surrounding or protruding square shape is illuminated. The requirements of national regulations on the car lamp are met while the uniform and attractive effect is realized.

Drawings

Fig. 1 is a side view of a fin structured light guide of the present invention installed in a vehicle lamp.

Fig. 2 is a side view of a fin structured light guide of the present invention.

Fig. 3 is a rear view of the fin structured light guide of the present invention.

Fig. 4 is a cross-sectional view at a-a of an optical system of the present invention having a fin structured light guide pointing in the direction of the X-axis.

Fig. 5 is a cross-sectional view at a-a of an optical system of the present invention having a fin structured light guide with a pointing direction at an angle to the X-axis.

Fig. 6 is a schematic view of the second light guide tooth extending in the vertical direction.

Fig. 7 is a schematic view of a hemispherical second light guide tooth according to the present invention.

Fig. 8 is a schematic view of the multi-section fin-shaped light guide according to the present invention.

Wherein: 1-LED light source module, 2-light guide with fin structure, 3-diffuse reflection cavity, 4-lens, 21-strip light guide, 22-first light guide tooth, 23-fin structure, 24-second light guide tooth, 25-internal reflection surface.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in detail with reference to the following embodiments, which are only used for explaining the present invention and do not limit the protection scope of the present invention.

As shown in fig. 1 to 8, the present embodiment provides an optical system with a light guide having a fin structure, including an LED light source module 1, a light guide 2 having a fin structure, a diffuse reflection cavity 3 disposed inside the fin structure, and a lens 4 disposed outside the light guide and having an optical diffusion effect, wherein the LED light source module 1 is disposed at one end or both ends of the light guide 2 having a fin structure, the light guide 2 having a fin structure includes a bar-shaped light guide 21 that uniformly emits light, a first light guide tooth 22 is disposed at one side of the bar-shaped light guide 21, a fin structure 23 is disposed at an opposite side of the first light guide tooth 22, a second light guide tooth 24 is disposed at one side or both sides of the fin structure 23, and an internal reflection surface 25 is disposed at a start position of the fin structure 23.

As shown in fig. 1, light emitted from the LED light source module 1 enters the strip light guide 21 and is totally reflected on the inner surface of the strip light guide. As shown in fig. 3, which is a rear view of the optical system, when light is reflected to the first light guiding tooth 22, the light is reflected at the surface of the light guiding tooth because the angle of the light guiding tooth is calculated precisely, and the reflected light is directed to the fin-shaped structure 23 perpendicular to the paper surface.

As shown in fig. 2, which is a side view of the optical system, part of the reflected light is reflected to the surface of the internal reflection surface 25 and is totally reflected, the reflected light travels along the inside of the fin-shaped structure 23 and is reflected to be transmitted from the surface of the fin-shaped structure 23 when being incident on the surface of the second light guide tooth 24, the transmitted light is incident on the surface of the diffuse reflection cavity 3 and is diffusely reflected, and the diffusely reflected light is scattered to a 90 ° conical area in the normal direction of the diffuse reflection surface, so as to illuminate the lens 4 in a semi-enclosed manner.

The other part of the reflected light directly enters the fin-shaped structure 23, and the propagation direction of the part of the light is parallel to the extension direction of each tooth in the second light guide tooth 24, so that the part of the light is not reflected by the teeth, and directly exits from the top surface of the fin-shaped structure 23, and has stronger directivity. Can be used for meeting the requirements of national regulations on the lighting of the car lamp.

As shown in fig. 4, which is a cross-sectional view a-a of the optical system, the fin-shaped structure 23 points in the X-axis direction. In addition, as shown in the cross-sectional view of fig. 5, the fin-shaped structure 23 is oriented at an angle with respect to the X-axis. Both forms can ensure that the part of the light reflected by the first light guiding tooth 22 has strong directivity. However, by adjusting the angle between the fin-shaped structure 23 and the X-axis direction, the uniformity of the illuminated effect of the semi-enclosed form lens 4 can be optimized.

As shown in fig. 6 and 7, there are two different structural forms of the second light guide tooth.

As shown in fig. 6, the extending direction of the teeth of the second light guide tooth 24 is perpendicular to the light directly reflected by the first light guide tooth 22 ((s))i) In the direction of (a). The energy emitted from the top surface of the fin-shaped structure 23 is attenuated by the light splitting action of the second light guide tooth 24, and the energy incident on the surface of the diffuse reflection cavity 3 is increased. Thereby achieving the effect of adjusting the energy distribution.

As shown in fig. 7, the second light guide tooth adopts a hemispherical structure. Are disposed on the sides of the fin-shaped structure 23 in a concave or convex manner. The fin-shaped structure has the function of finely adjusting the proportion of the outgoing energy of the top surface of the fin-shaped structure to the outgoing energy of the side surface of the fin-shaped structure.

As shown in fig. 8, the position and number of the fin-shaped structures can be adjusted according to different illumination areas.

Claims

1. An optical system with a fin-structured light guide, comprising an LED light source module (1), a light guide with a fin-structure (2), a diffusely reflective cavity (3) arranged inside the fin-structure, and a lens (4) with an optical diffusing effect arranged outside the light guide, the LED light source module (1) being arranged at one or both ends of the light guide with a fin-structure (2), characterized in that: the light guide (2) with the fin-shaped structure comprises a strip-shaped light guide (21) which emits light uniformly, a first light guide tooth (22) is arranged on one side of the strip-shaped light guide (21), a fin-shaped structure (23) is arranged on the opposite side of the first light guide tooth (22), second light guide teeth (24) are arranged on one side or two sides of the fin-shaped structure (23), and an internal reflection surface (25) is arranged at the starting position of the fin-shaped structure (23).

2. An optical system having a fin structured light guide as claimed in claim 1, wherein: a part of the surface of the diffuse reflection cavity (3) is opposite to the second light guide tooth (24).

3. An optical system having a fin structured light guide as claimed in claim 1, wherein: the number of the fin-shaped structures (23) with the fin-shaped structure light guide (2) is at least one, and a second light guide tooth (24) is arranged on one side or two sides of each section of the fin-shaped structure (23).

4. An optical system having a fin structured light guide as claimed in any one of claims 1 to 3, wherein: the section of the second light guide tooth (24) of the light guide (2) with the fin-shaped structure is sawtooth-shaped, and the second light guide tooth is sunken in or protrudes out of the side surface of the fin-shaped structure (23), and the extending direction of the tooth in the second light guide tooth (24) is parallel to or perpendicular to the direction of the light directly reflected by the first light guide tooth (22).

5. An optical system having a fin structured light guide as claimed in any one of claims 1 to 3, wherein: the second light guide tooth (24) on the light guide (2) with the fin-shaped structure is hemispherical and is sunken in or protruded out of the side surface of the fin-shaped structure (23).

6. An optical system having a fin structured light guide as claimed in claim 1 or 3, wherein: the pointing direction of the fin-shaped structure (23) on the light guide (2) with the fin-shaped structure is an X-axis direction, or an included angle is formed between the pointing direction of the fin-shaped structure (23) and the X-axis direction.

7. An optical system having a fin structured light guide as claimed in claim 1, wherein: the surface of the lens (4) is provided with dermatoglyph with optical diffusion effect.

8. An optical system having a fin structured light guide as claimed in claim 1, wherein: and the surface of the lens (4) is provided with a latticed pillow-shaped pattern with an optical diffusion effect.

9. An optical system having a fin structured light guide as claimed in claim 1, wherein: the lens material of the lens (4) has optically diffusible fine particles dispersed therein.

10. An optical system having a fin structured light guide as claimed in claim 1, wherein: the light guide (2) with the fin-shaped structure is made of polymethyl methacrylate or polycarbonate.