CN111486411A - Light guide structure with extremely short light mixing distance and car lamp - Google Patents

Abstract

The invention relates to the technical field of light guide structures and vehicle lamps, and discloses a light guide structure with an extremely short light mixing distance. The device is through setting up the portion of mixing light at the income light end of strip light guide part, and mix the light portion and make by light diffusion material PMMA, and inside is realized the effect of even mixed light after going on reflecting many times to the light that the light source was emitted by even diffuse reflection of light granule. Therefore, the light can be uniformly mixed in a short distance through multiple reflections, and the light entering the light guide part from the light mixing part is uniformly mixed light which can be directly projected. Because the thickness of the light mixing part made of the light diffusion PMMA material is about 2mm generally, the light mixing distance is greatly reduced compared with the light mixing distance of the traditional light guide structure, and the light mixing distance of the light guide structure of the car light can be effectively reduced.

Description

A light guide structure and vehicle lamp with extremely short light mixing distance

technical field

The invention relates to the technical field of a light guide structure and a vehicle lamp, in particular to a light guide structure and a vehicle lamp with an extremely short light mixing distance.

Background technique

With the development of science and technology and the improvement of living standards, passenger cars have gradually become the main means of transportation for people to travel. In the field of vehicle lighting design and manufacturing, LED light sources have the advantages of fast response, low energy consumption, and stable chromaticity. To become the main light source used in vehicle lamps, higher light efficiency and smaller structure space occupation are the pursuit and goals in the design and manufacture of vehicle lamps and lanterns. During the propagation of light, the traditional light guide needs to perform multiple total reflections in the light guide part so that the light can be mixed more evenly, so that a better light irradiation effect can be achieved in the light guide part in the rear section. Due to the long mixing distance of the light rays, uniform light output can be achieved. However, the structure of the car light is getting more and more compact, and the traditional light guide structure needs a light mixing distance of about 20mm to achieve a better light mixing effect, which leads to an increase in the space occupied by the light structure. In particular, for the existing penetrating central position light set to increase the aesthetics of the vehicle, the two ends of the penetrating central position light need to be set with a smaller light mixing distance to reduce the luminous dark areas at both ends of the penetrating central position light and ensure its beauty. Therefore, the light mixing distance of the smaller vehicle light guide structure is now the goal of each vehicle lamp manufacturer when designing and manufacturing the light guide.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a light guide structure and a vehicle lamp with extremely short light mixing distance, the device has a short light mixing distance and can save the space occupied by the vehicle lamp.

In order to achieve the above object, the present invention provides the following technical solutions:

A light guide structure with an extremely short light mixing distance, wherein the light guide structure includes a light mixing part and a light guiding part, the light mixing part is fixedly arranged at the light entrance end of the light guiding part, and the light mixing part is uniform inside There are reflective particles dispersed, and the higher the concentration of the reflective particles, the shorter the light mixing distance.

In the present invention, preferably, the light guide portion is made of a diffusing material, the diffusing material is light diffusing PMMA, and the light guide portion is made of PP or PMMA.

In the present invention, preferably, the light diffusing PMMA is set to PMMA8NDF21 or PMMA8NDF22 or PMMA8NDF23.

In the present invention, preferably, the light guide portion is configured as a strip-shaped structure, and the three groups of sidewall surfaces of the light guide portion are configured as arc-shaped reflective surfaces. Multiple sets of optical teeth.

In the present invention, preferably, the compact arrangement of the plurality of groups of the optical teeth is such that the farther away from the light source, the more compactly arranged.

In the present invention, preferably, the light mixing portion and the light guiding portion are integrally formed by an injection molding process.

In addition, the present invention also provides a vehicle lamp structure, which is characterized in that it includes a light guide structure with an extremely short light mixing distance as described in any one of the above.

In the present invention, preferably, both ends of the light guide portion are provided with light mixing portions, and a light source is provided on the outer side of each group of the light mixing portions.

In the present invention, preferably, the light sources located on both end sides of the light guide portion have different emission colors.

Compared with the prior art, the beneficial effects of the present invention are:

In the device of the present invention, a light mixing part is arranged at the light entrance end of the strip-shaped light guide part, and the light mixing part is made of light diffusing material PMMA, and the interior of the light mixing part is made of uniformly dispersed reflective particles to reflect the light emitted by the light source multiple times. Afterwards, the effect of uniform light mixing is achieved. Therefore, the light can be uniformly mixed by multiple reflections in the light mixing part with a short distance, so that the light entering the light guide part from the light mixing part is a uniform mixed light that can be directly projected. Since the thickness of the light mixing part made of light diffusing PMMA material is usually about 2mm, the light mixing distance of the traditional light guide structure is greatly reduced, which can effectively reduce the light mixing distance of the light guide structure of the vehicle lamp.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the light guide structure in the present invention.

FIG. 2 is an enlarged schematic view of the light guide structure at the light entrance end.

FIG. 3 is a side view of the tightness of the arrangement of the optical teeth in the present invention.

FIG. 4 is a schematic diagram of the overall structure of the light mixing part in the present invention.

FIG. 5 is a schematic structural diagram of a vehicle lamp when both ends are provided with light sources according to the present invention.

In the drawings: 1. Light mixing part; 10. Arc-shaped reflecting surface; 11. Light-emitting plane; 2. Light-guiding part; 3. Optical tooth; 4. Buckle end; 5. Light source.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a co-existence of an intervening component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a co-existing centered component. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIGS. 1 to 5 at the same time. A preferred embodiment of the present invention provides a light guide structure with an extremely short light mixing distance. The light guide structure includes a light mixing portion 1 and a light guiding portion 2. The light mixing portion 1 It is fixedly arranged at the light entrance end of the light guide part 2, and the light mixing part 1 is uniformly dispersed with reflective particles. The higher the concentration of the reflective particles, the shorter the light mixing distance. This light mixing part is manufactured by injection molding of light-diffusing PPMA material. Usually, PMMA8NDF21 or PMMA8NDF22 or PMMA8NDF23 on the market are purchased as raw materials for injection molding according to the required shape. The final effect of the light mixing part is that the interior is milky white. In the state of mist dispersion, PMMA8NDF21 or PMMA8NDF22 or PMMA8NDF23 are the existing materials that can be directly purchased on the market. In the later stage, it can be molded into the desired shape by a mold. Since there are many micro-reflection particles inside the light mixing part 1, the incoming light will be reflected and mixed in various directions for many times, and then the projection angle between the light will become more disordered, thereby achieving the effect of uniform mixing of the light. The light mixing part 1 is fixed at the light incident end of the light guide part 2 by means of bonding or two-color injection molding. The light after multiple reflections by the internal light-reflecting particles enters the light guide portion 2 from the interface without leakage. The higher the concentration of scattered light-reflecting particles in the light mixing part 1 is, the smaller the thickness of the light mixing part 1 is.

The light guide part 2 is made of a diffusing material, the diffusing material is light diffusing PMMA (acrylic), and the light diffusing PMMA (acrylic) is set to PMMA8NDF21 or PMMA8NDF22 or PMMA8NDF23. DF21-DF23 are the same series of light diffusing materials. Due to the different concentrations of reflective particles inside them after injection molding, the manufacture of light mixing parts 1 with different thickness requirements can be achieved. This material can be purchased directly from manufacturers on the market, and then melted and re-molded through the injection molding process.

The light guide portion 2 is made of PP (polypropylene) or PMMA, and the surface of the light guide portion 2 is a smooth and transparent structure.

As shown in FIG. 4 , the light guide portion 2 is configured as a strip-shaped structure, and three groups of sidewall surfaces among the four groups of sidewall surfaces of the light guide portion 2 are configured as arc-shaped reflective surfaces 10 . One group of sidewall surfaces is a light exit plane 11 . , the four groups of sidewall surfaces will totally reflect the light transmitted in the inner space of the light guide part 2 to ensure that the light will not be emitted from the sidewall surface. Multiple groups of optical teeth 3 are arranged on the light exit plane 11. The optical tooth 3 will be emitted from the surface of the optical tooth 3 . The light guide portion is fixedly provided with a fixed snap terminal 4 matching the external installation structure, which is used for the later installation and fixation of the light guide structure.

As shown in FIG. 3 , the compact arrangement of the plurality of groups of the optical teeth 3 is such that the farther away from the light source 5, the more densely arranged. Increasing the closeness of the arrangement of the optical teeth 3 increases the number of the optical teeth 3, thereby increasing the amount of light transmission, thereby ensuring that the emitted light from all places is more uniform. The optical tooth 3 is a triangular protruding structure, one side of which is the light emitting surface of the light, which can project a part of the light propagating in the light guide part 2 outward, and the propagation of the light in the whole light guide part 2 and the like Unlike the propagation of light waves in the existing optical fibers, when a part of the light rays with a suitable projection angle hit the light emitting surface of the optical tooth 3, they will be emitted to the outside from there.

The light mixing portion 1 and the light guiding portion 2 are integrally formed by a two-color injection molding process.

As shown in FIG. 5 , the present invention further provides a vehicle lamp structure, which is characterized in that it includes the above-mentioned light guide structure with an extremely short light mixing distance. Both ends of the light guide portion 2 are provided with light mixing portions 1 , and a light source 5 is provided on the outer side of each group of the light mixing portions 1 . This light structure is mostly used for through-type central light bars, and its overall structure is relatively straight and long. 2 , and at the same time, the uniformity of light emission at various points of the strip-shaped light guide portion 2 will be adjusted by the tightness of the arrangement of the optical teeth 3 .

The light sources 5 located on both end sides of the light guide portion 2 have different emission colors. When the colors of the light sources 5 disposed at both ends are different, the color of the light emitted by the light guide portion 2 can be adjusted by adjusting the lighting sequence and the brightness of the two groups of light sources 5. The vehicle lights of this structure can be set as welcome lights or ambient lights , by mixing light sources 5 of different colors to produce light colors with different color effects to increase the aesthetics of the headlights.

working principle:

First, the staff fixed the light guide structure at the specific position of the lamp, then fixed the LED light source on the PCB substrate, and then fixed the PCB substrate inside the lamp placement cavity, and ensured that the LED light source was located outside the light mixing part 1. Then the lights are turned on by lighting the LED light source. The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to This invention covers the scope of the patent.

Claims (9)

1. The light guide structure with the extremely short light mixing distance is characterized by comprising a light mixing part (1) and a light guide part (2), wherein the light mixing part (1) is fixedly arranged at the light inlet end of the light guide part (2), light reflecting particles are uniformly dispersed in the light mixing part (1), and the light mixing distance is shorter as the concentration of the light reflecting particles is higher.

2. A light-guiding structure with extremely short mixing distance as defined in claim 1, characterized in that the light-guiding part (2) is made of a diffusing material, which is light-diffusing PMMA, and the light-guiding part (2) is made of PP or PMMA.

3. A light-guiding structure with extremely short light-mixing distance according to claim 2, characterized in that the light-diffusing PMMA is provided as PMMA8N DF21 or PMMA8N DF22 or PMMA8N DF 23.

4. A light guide structure with very short light mixing distance according to claim 1, characterized in that the light guide part (2) is configured as a strip structure, three sets of side wall surfaces of the light guide part (2) are configured as arc reflective surfaces (10), and one set of side wall surfaces is a light exit plane (11), and a plurality of sets of optical teeth (3) are arranged on the light exit plane (11).

5. A light-guiding structure with very short mixing distance as defined in claim 4, characterized in that the multiple sets of said optical teeth (3) are arranged more closely together the farther away from the light source (5).

6. A light guide structure with an extremely short mixing distance as claimed in claim 1, characterized in that the light mixing part (1) and the light guide part (2) are integrally manufactured by injection molding.

7. A vehicular lamp structure characterized by comprising a light guide structure having an extremely short light mixing distance as recited in any one of claims 1 to 6.

8. A light guide structure with very short light mixing distance according to claim 7, characterized in that both ends of the light guide part (2) are provided with light mixing parts (1), and the outer side of each group of light mixing parts (1) is provided with a light source (5).

9. A light-guiding structure with an extremely short mixing distance as defined in claim 8, characterized in that the luminous colors of the light sources (5) located at both end sides of the light-guiding part (2) are different.

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