CN108626691B

CN108626691B - Rear combined lamp capable of realizing uniform light emission through light guide of two-way side light

Info

Publication number: CN108626691B
Application number: CN201810440943.4A
Authority: CN
Inventors: 齐廷胜
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2018-05-10
Filing date: 2018-05-10
Publication date: 2024-04-19
Anticipated expiration: 2038-05-10
Also published as: CN108626691A

Abstract

The invention discloses a rear combination lamp capable of realizing uniform light emission through a light guide with two-way side light inlet, and relates to the field of vehicle lamp illumination. The LED lamp comprises an outer lamp shade, a decorative ring, an inner lamp shade, a light guide bracket, an LED module and a shell, wherein the outer lamp shade is welded on the shell to form a closed cavity; the decorative ring, the inner lampshade, the light guide bracket and the LED module are all arranged in the closed cavity; the inner lampshade, the light guide and the LED module are all arranged on the light guide bracket, and the light guide is a light guide with two-way side light feeding; light rays emitted by a side-emitting LED light source in the LED module are transmitted in the light guide through the total reflection principle, and the light rays emitted from the light guide are emitted through the inner lampshade. The LED module is combined with the light guide of the two-way side light, so that the problem that the position lamp emits light uniformly when the space of the lamp is narrow and the optical system cannot be arranged is solved, and the cost of the lamp is reduced greatly.

Description

Rear combined lamp capable of realizing uniform light emission through light guide of two-way side light

Technical Field

The invention relates to the field of illumination of vehicle lamps, in particular to a rear combination lamp capable of realizing uniform light emission through a light guide with two-way side light inlet.

Background

Along with the rapid development and popularization of the automotive industry in China, in order to meet the continuous improvement of the requirements of customers on the appearance of automobiles, the appearance models of all automobile manufacturers are more and more cool, especially on the models of the lamps, and the lighting effect of the lamps can be directly influenced by the light distribution schemes adopted for different models of the lamps.

At present, the LED light source reflection type position lamp light distribution scheme is widely adopted, and has the defects that: the transition area between each LED reflecting surface has obvious dark area, when the car lamp is long and narrow, a plurality of LED light sources are needed to meet the requirement of uniformity of lighting of the lamp, and the cost is high. The divergence angle of the LED light source is usually single-sided 60 degrees, so when the combination of the light guide and the LEDs is used for meeting various modeling requirements, the LED light source is required to be shielded, bright spots are avoided, the light guide, the LED light source and the LED circuit board are required to be arranged in enough space, and if the space in a lamp cavity is narrow, an optical system cannot be arranged.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the rear combination lamp for realizing uniform light emission through the light guide of the two-way side light, and the LED module is combined with the light guide of the two-way side light, so that the problem of uniform light emission of the position lamp when the space of the lamp is narrow and the optical system cannot be arranged is effectively solved, meanwhile, the uniformity of the light emitting effect of the light guide of the two-way side light is better, the number of required LED light sources is less, and the cost of the lamp is greatly reduced.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

A rear combination lamp capable of realizing uniform light emission through a light guide with two-way side light inlet comprises an outer lampshade, a decorative ring, an inner lampshade, a light guide support, an LED module and a shell, wherein the outer lampshade is welded on the shell to form a closed cavity; the decorative ring, the inner lampshade, the light guide bracket and the LED module are all arranged in the closed cavity; the inner lampshade, the light guide and the LED module are all arranged on the light guide bracket, and the light guide is a light guide with two-way side light feeding; light rays emitted by a side-emitting LED light source in the LED module are transmitted in the light guide through the total reflection principle, and the light rays emitted from the light guide are emitted through the inner lampshade.

Further, the inner lampshade comprises an inner lampshade pattern surface and inner lampshade clamping feet, the inner lampshade pattern surface breaks up and shoots out light rays emitted from the light guide, and the shape and the wall thickness of the inner lampshade can be adjusted according to the space of the lamp.

The light guide comprises a light guide input surface, light guide teeth and a light guide pattern surface, the light guide input surface extends light rays, the light rays are polished upwards through the light guide teeth, the light rays are emitted through the light guide pattern surface, and the shape and the wall thickness of the light guide can be adjusted according to the space of the lamp.

Further, the distance L between the side-emitting LED light source and the light guide input surface is controlled within 2mm, and the light emitting direction is consistent with the direction of the guide line of the light guide.

Further, the light guide is a transparent PMMA material; the light guide holder is of an opaque material.

The beneficial effects are that:

1. The LED module and the light guide combination of the two-way side light are adopted to realize uniform light emission of the position lamp, the required number of LEDs is fewer, and the cost is lower.

2. Different from the traditional light emitting mode of the LED light source, the invention adopts the side light emitting LED light source, solves the limitation of insufficient space, realizes the transmission of light in the light guide through the total reflection principle by effectively combining the side light emitting LED light source with the light guide, shields the LED area by the decorative ring, avoids bright spots and realizes the uniform lighting of the whole position lamp through the diffusion function of the pattern surface of the inner lampshade.

3. According to the invention, the distance between the side-emitting LED light source and the light guide input surface is controlled within 2mm, the light emitting direction is consistent with the direction of the light guide line, and the problem that an optical system cannot be arranged due to the limitation of the space of the lamp is effectively solved.

Drawings

FIG. 1 is a front view of an inner globe, light guide bracket and LED module combination according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a schematic exploded view of a rear combination lamp according to an embodiment of the present invention;

In the figure: the LED lamp comprises a lamp shade 1, a decorative ring 2, an inner lamp shade 3, a light guide 4, a light guide support 5, an LED module 6, a shell 7, a pattern surface of the inner lamp shade 31, a clamping foot of the inner lamp shade 32, an input surface of the light guide 41, a tooth of the light guide 42, a pattern surface of the light guide 43 and a side-emitting LED light source 61.

Detailed Description

The invention will be further described with reference to the drawings and examples.

The embodiment provides a rear combination lamp for realizing uniform light emission through a light guide with two-way side light, as shown in figures 1, 2 and 3, which comprises an outer lampshade 1, a decorative ring 2, an inner lampshade 3, a light guide 4 with two-way side light, a light guide bracket 5, an LED module 6 and a shell 7, wherein the outer lampshade 1 is welded on the shell 7 to form a closed cavity; the decorative ring 2, the inner lampshade 3, the light guide 4 for two-way side light feeding, the light guide bracket 5 and the LED module 6 are all arranged in the closed cavity; the inner lampshade 3, the light guide 4 for two-way side light feeding and the LED module 6 are all arranged on the light guide bracket 5; the inner lampshade 3 comprises an inner lampshade pattern surface 31 and an inner lampshade clamping foot 32; the light guide 4 comprises a light guide input face 41, light guide teeth 42 and a light guide patterned face 43.

In this embodiment, the light guide 4 and the LED module 6 are fixed on the light guide bracket 5 by screwing and positioning, the inner lampshade 3 is fixed on the light guide bracket 5 by screwing, then the fixed assembly is mounted on the housing 7 by clamping, the decorative ring 2 is fixed on the housing 7 by screwing, and finally the lampshade 1 is fixed on the housing 7 by welding.

In the present embodiment, the light emitted by the side-emitting LED light source 61 in the LED module 6 passes through the light guide input surface 41, and the light is extended by utilizing the principle of total reflection of the light; light in the light guide 4 is polished upwards through the light guide teeth 42 on the surface of the light guide, then the light is emitted through the light guide pattern surface 43, the light emitted from the light guide 4 enters the inner lampshade 3, and finally the light is scattered and emitted through the inner lampshade pattern surface 31, so that the problem of uniformity of the position lamp is effectively solved.

In the present embodiment, as shown in fig. 2, the distance L between the side-emitting LED light source 61 and the light guide input surface 41 is controlled within 2mm, and the light emitting direction coincides with the light guide line direction, effectively solving the problem that the optical system cannot be arranged due to the limitation of the space of the lamp.

It should be apparent to those skilled in the art that various modifications or variations can be made in the present invention without requiring any inventive effort by those skilled in the art based on the technical solutions of the present invention.

Claims

1. A rear combination lamp capable of realizing uniform light emission through a light guide with two-way side light inlet comprises an outer lampshade (1), a decorative ring (2), an inner lampshade (3), a light guide (4), a light guide bracket (5), an LED module (6) and a shell (7), wherein the outer lampshade (1) is welded on the shell (7) to form a closed cavity; the decorative ring (2), the inner lampshade (3), the light guide (4), the light guide bracket (5) and the LED module (6) are all arranged in the closed cavity; the inner lampshade (3), the light guide (4) and the LED module (6) are all installed on the light guide support (5), and the LED module is characterized in that: the light guide (4) comprises a light guide input surface (41), light guide teeth (42) and a light guide pattern surface (43), wherein the light guide input surface (41) extends light rays, the light rays are polished upwards through the light guide teeth (42), and the light rays are emitted through the light guide pattern surface (43); the light guide (4) is a bi-directional side-entry light guide; light rays emitted by a side-emitting LED light source (61) in the LED module (6) are transmitted in the light guide (4) through the total reflection principle, and the light rays emitted from the light guide (4) are emitted through the inner lampshade (3); the inner lampshade (3) comprises an inner lampshade pattern surface (31) and inner lampshade clamping feet (32), and the inner lampshade pattern surface (31) breaks up and emits light emitted from the light guide (4).

2. The rear combination lamp of claim 1 wherein uniform light emission is achieved by a bi-directional side entry light guide, wherein: the distance L between the side-emitting LED light source (61) and the light guide input surface (41) is controlled within 2mm, and the light emitting direction is consistent with the direction of the light guide line.

3. The rear combination lamp of claim 1 wherein uniform light emission is achieved by a bi-directional side entry light guide, wherein: the light guide (4) is a transparent PMMA material; the light guide support (5) is of an opaque material.