CN218032953U

CN218032953U - Multi-angle uniform light-emitting thick-wall light guide structure

Info

Publication number: CN218032953U
Application number: CN202222191908.8U
Authority: CN
Inventors: 张珂; 范明璐
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-13
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a multi-angle evenly luminous thick wall light guide structure, it includes thick wall light guide, collimation structure, LED secondary light source and light emitting structure, the thick wall light guide has the back lateral wall, and thick wall light guide one side adjacent with the back lateral wall is the initiating terminal, and the thick wall light guide opposite side relative with the initiating terminal is the end, the thick wall light guide end has optical surface, the thick wall light guide is the plain noodles with the relative one side of back lateral wall, light emitting structure sets up in thick wall light guide rear side, the collimation structure sets up in the initiating terminal of thick wall light guide, LED secondary light source is located the focus position of collimation structure; light rays emitted by the LED secondary light source can be coupled into the thick-wall light guide after being collimated by the collimating structure, and are transmitted to the optical surface in the thick-wall light guide to be totally internally reflected, and then are emitted out through the light emitting surface. The utility model discloses can solve the dark space problem that traditional thick wall light guide structure end exists, realize the effect that the multi-angle evenly lightened.

Description

Multi-angle thick wall light guide structure capable of uniformly emitting light

Technical Field

The utility model relates to an automobile light signal and lighting technology field especially relate to a thick wall light guide structure that multi-angle evenly gives out light.

Background

With the development of the car lamp technology, the car lamp has higher requirements on shape and appearance, and particularly focuses on lighting uniformity and spatial stereoscopic impression. The thick-wall light guide optical system is a common optical scheme and can bring lighting space stereoscopic impression, delicacy and technological feeling to the car lamp.

At present, most of thick-wall light guide optical systems only arrange a light source light-emitting structure at the rear side of the thick-wall light guide, and lighting schemes have various options, including a reflector, a condenser, a light guide and the like. However, the above conventional scheme structures all have lighting defects, which can be seen from fig. 1 and 4, that is, when viewed from a left large viewing angle, the right end of the thick-walled part has a significant dark area, thereby affecting the overall lighting uniformity. This dark space problem is particularly apparent in automotive signal corner lamp applications.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art not enough, provide a multi-angle thick wall light guide structure that evenly gives out light, it can solve the dark space problem that traditional thick wall light guide structure end exists, realizes the effect that the multi-angle was evenly lighted.

In order to solve the technical problem, the technical scheme of the utility model is that:

a multi-angle uniform light-emitting thick-wall light guide structure comprises a thick-wall light guide, a collimation structure, an LED secondary light source and a light-emitting structure, wherein the thick-wall light guide is provided with a rear side wall, one side of the thick-wall light guide adjacent to the rear side wall is a starting end, the other side of the thick-wall light guide opposite to the starting end is a tail end, the tail end of the thick-wall light guide is provided with an optical surface, one side of the thick-wall light guide opposite to the rear side wall is a light-emitting surface, the light-emitting structure is arranged on the rear side of the thick-wall light guide, the collimation structure is arranged at the starting end of the thick-wall light guide, and the LED secondary light source is positioned at a focus position of the collimation structure;

the light emitting structure is used for emitting light and coupling the light into the thick-walled light guide from the rear side wall; light rays emitted by the LED secondary light source can be coupled into the thick-wall light guide after being collimated by the collimating structure, and are transmitted to the optical surface in the thick-wall light guide to be totally internally reflected, and then are emitted out through the light emitting surface.

Further, the collimating structure is a condenser or a collimating lens or a reflector.

Further, the condenser is a circular condenser or a special-shaped condenser.

Further, the collimating structure and the thick-wall light guide are of an integrated structure or a split structure.

Furthermore, step-shaped stripes are arranged on the rear side wall.

Furthermore, the surface of the optical surface is additionally provided with decorative patterns or dermatoglyphs.

Furthermore, the surface of the light-emitting surface is provided with patterns.

Furthermore, the thick-wall light guide is made of transparent PC or PMMA.

Further, the light emitting structure comprises a main LED light source and a collimating element, the collimating element is arranged on the rear side of the thick-wall light guide, and the main LED light source is located at the focal position of the collimating element.

Further, the collimating element is a mirror or a light guide or a condenser.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses on the basis of traditional thick wall light guide structure, alignment structure and corresponding LED secondary light source have been add at the initiating terminal of thick wall light guide again, through light total internal reflection principle, have supplemented the terminal luminance in thick wall light guide right side, and then have solved the dark space problem of lightening the existence, have realized the even luminous effect of multi-angle.

Drawings

FIG. 1 is a schematic optical path diagram of a conventional reflective thick-walled light guide structure;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is a schematic diagram of an optical path according to an embodiment of the present invention;

FIG. 4 is a diagram of the lighting effect of a 45 degree viewing angle on the left side of a conventional reflective thick-walled light guide structure;

fig. 5 is a lighting effect diagram of the left 45-degree viewing angle of the embodiment of the present invention;

therein, 1. Thick-walled light guide; 10. a rear sidewall; 11. a starting end; 12. an optical surface; 13. a light-emitting surface; 2. a condenser; LED secondary light source; LED primary light source; 5. a mirror; 6. a terminal dark region; 7. a thick-walled member.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

Fig. 1 shows a schematic optical path diagram of a conventional reflective thick-walled light guide structure in the prior art, which includes a conventional thick-walled member 7, a primary LED light source 4 and a reflector 5 located behind the thick-walled member 7. The LED main light source 4 is located at the focal point of the reflector 5, the surface of the reflector 5 is provided with diffusion patterns, light emitted by the light source is collimated and diffused by the reflector 5 and then coupled into the thick-wall part 7 from the rear side wall 10, and the light is transmitted, totally reflected and refracted in the thick-wall part 7 and finally emitted out through the light emitting surface 13. From a large left-side perspective, for example, 45 ° to the left, the end of the thick-walled member 7 would appear as a dark region at the right-side end region, i.e., the end dark region 6 shown in the figure, due to the lack of the corresponding large-angle light from the reflector 5, and the observation effect can be seen with reference to fig. 4.

As shown in fig. 2 and fig. 3, in order to solve the above problem, in the present embodiment, a multi-angle uniform light emitting thick-wall light guide structure is provided, which mainly comprises a thick-wall light guide 1, a collimating structure, an LED secondary light source 3, and a light emitting structure. Wherein the thick-wall light guide 1 is provided with a rear side wall 10, and step-shaped stripes are formed on the rear side wall 10 to improve the uniformity of incident light; one side of the thick-wall light guide 1 adjacent to the rear side wall 10 is a starting end 11, and the starting end 11 is thickened and is thicker than a conventional light guide, so that the entering light can be better transmitted; the other side of the thick-wall light guide 1 opposite to the starting end 11 is a tail end, the tail end of the thick-wall light guide 1 is provided with an optical surface 12, the surface of the optical surface 12 is additionally provided with patterns or dermatoglyphs so as to enable the lighting effect to be more uniform, and the patterns can be vertical stripes, horizontal stripes, corn grain patterns, pyramid-shaped patterns, irregular patterns and the like; the surface of the thick-wall light guide 1 opposite to the rear side wall 10 is a light-emitting surface 13, and patterns are formed on the surface of the light-emitting surface 13 so as to enable the emergent light to be more uniform, wherein the patterns can be stripes, corn grain patterns and the like. The light emitting structure is arranged at the rear side of the thick-wall light guide 1, the collimating structure is arranged at the starting end 11 of the thick-wall light guide 1, the collimating structure and the thick-wall light guide 1 can be of an integrated structure or a split structure, and the LED secondary light source 3 is positioned at the focal position of the collimating structure.

Specifically, the light emitting structure in this embodiment includes a primary LED light source 4 and a collimating element, where the collimating element is disposed at the rear side of the thick-wall light guide 1, the primary LED light source 4 is located at the focal point of the collimating element, and the collimating element may be a specific collimating structure such as a reflector 5 or a light guide or a condenser, and the reflector 5 is selected as the collimating element in this embodiment. The surface of the reflector 5 is provided with diffusion patterns to improve the lighting uniformity, and under normal conditions, light rays emitted by the LED main light source 4 are collimated and diffused by the reflector 5, then coupled into the thick-wall light guide 1 from the rear side wall 10, transmitted, totally reflected and refracted in the thick-wall light guide 1, and finally emitted in parallel through the light emitting surface 13.

Specifically, the collimating structure may be a specific collimating structure such as a condenser 2 or a collimating lens or a mirror. In this embodiment, the collimating structure is a condenser 2, and the condenser 2 may be a commonly used circular condenser or a special-shaped condenser, such as an asymmetric condenser, a stretching condenser, or a nesting condenser. In this embodiment, the condenser 2 is a circular condenser, and the condenser 2 and the thick-walled light guide 1 are of an integrated structure.

Specifically, the thick-walled light guide 1 may be made of a transparent PC or PMMA material, and the thick-walled light guide 1 in the present embodiment is made of a PC material.

Through the above design of this embodiment, in addition to the LED main light source 4 emitting light normally and being lit from the light exit surface 13, the light emitted by the LED sub-light source 3 is also collimated by the condenser 2 and then coupled into the thick-walled light guide 1 from the start end 11, and is transmitted in the transparent thick-walled light guide 1, and is totally internally reflected at the optical surface 12, so that the light is deflected in the direction and finally exits through the light exit surface 13. Emergent light mainly follows the left side angle, can compare the light path schematic diagram of referring to fig. 3 and fig. 1, and the lower right corner light path of fig. 3 has just supplemented the terminal luminance at the left side visual angle of thick wall light guide 1, has lighted the terminal dark space 6 of the terminal right side of thick wall light guide 1, and then makes whole thick wall light guide 1 can both present the effect of evenly lighting at a plurality of angles, and the observation effect can refer to fig. 5 and show.

Fig. 4 is a lighting effect diagram of a 45-degree viewing angle on the left side of the conventional reflective thick-walled light guide structure, and fig. 5 is a lighting effect diagram of a 45-degree viewing angle on the left side of the present embodiment. In contrast, fig. 4 and 5 respectively show the lighting effect of the thick-walled light guide optical system before and after the improvement of the present invention, and it can be seen that the right-side end dark area in fig. 4 is obviously improved in fig. 5.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments further describe the technical problems, technical solutions and advantageous effects of the present invention in detail, it should be understood that the above only are the embodiments of the present invention, and are not intended to limit the present invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a multi-angle uniform lighting thick wall light guide structure which characterized in that: the LED light guide comprises a thick-wall light guide (1), a collimation structure, an LED secondary light source (3) and a light emitting structure, wherein the thick-wall light guide (1) is provided with a rear side wall (10), one side of the thick-wall light guide (1) adjacent to the rear side wall (10) is a starting end (11), the other side of the thick-wall light guide (1) opposite to the starting end (11) is a tail end, the tail end of the thick-wall light guide (1) is provided with an optical surface (12), one surface of the thick-wall light guide (1) opposite to the rear side wall (10) is a light emitting surface (13), the light emitting structure is arranged on the rear side of the thick-wall light guide (1), the collimation structure is arranged at the starting end (11) of the thick-wall light guide (1), and the LED secondary light source (3) is located at a focus position of the collimation structure;

the light emitting structure is used for emitting light and coupling light into the thick-walled light guide (1) from the rear side wall (10); light rays emitted by the LED secondary light source (3) can be collimated by the collimating structure and then coupled into the thick-wall light guide (1), and the light rays are transmitted to the optical surface (12) in the thick-wall light guide (1) to be subjected to total internal reflection and then emitted out through the light emitting surface (13).

2. The multi-angle uniform light-emitting thick-walled light guide structure of claim 1, wherein: the collimating structure is a condenser (2) or a collimating lens or a reflector.

3. The multi-angle uniform light-emitting thick-wall light guide structure of claim 2, wherein: the condenser (2) is a circular condenser or a special-shaped condenser.

4. The multi-angle uniform light-emitting thick-walled light guide structure of claim 1, wherein: the collimation structure and the thick-wall light guide (1) are of an integrated structure or a split structure.

5. The multi-angle uniform light-emitting thick-wall light guide structure of claim 1, wherein: the rear side wall (10) is provided with step-shaped stripes.

6. The multi-angle uniform light-emitting thick-wall light guide structure of claim 1, wherein: the surface of the optical surface (12) is additionally provided with patterns or dermatoglyphs.

7. The multi-angle uniform light-emitting thick-walled light guide structure of claim 1, wherein: the surface of the light emitting surface (13) is provided with patterns.

8. The multi-angle uniform light-emitting thick-walled light guide structure of claim 1, wherein: the thick-walled light guide (1) is made of transparent PC or PMMA.

9. The multi-angle uniform light-emitting thick-wall light guide structure of claim 1, wherein: the light emitting structure comprises an LED main light source (4) and a collimating part, wherein the collimating part is arranged on the rear side of the thick-wall light guide (1), and the LED main light source (4) is located at the focal position of the collimating part.

10. The multi-angle uniform light-emitting thick-wall light guide structure of claim 9, wherein: the collimating element is a mirror (5) or a light guide or a light collector.