CN214306925U

CN214306925U - Vehicle lamp optical system

Info

Publication number: CN214306925U
Application number: CN202120540400.7U
Authority: CN
Inventors: 邱敏辉; 胡尚斌; 顾丹; 俞涛; 秦悦; 王建良
Original assignee: HASCO Vision Technology Co Ltd
Current assignee: HASCO Vision Technology Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-09-28
Anticipated expiration: 2031-03-16

Abstract

The utility model relates to a vehicle lamp optical system, which comprises a light guide, wherein the light guide is provided with a first optical coupling surface as a total reflection surface and a second optical coupling surface as a light emitting surface; the part of the first optical coupling surface, which is close to the tail end of the light guide, is coated with a colored paint layer of light color absorbed by the light guide material. The utility model provides a problem of difference on light guide head and the terminal colour, realize adjusting the function of the different position vision colours of light guide.

Description

Vehicle lamp optical system

Technical Field

The utility model relates to a vehicle lamps and lanterns optical system belongs to car light technical field.

Background

At present, more and more vehicle lamps adopt LED light sources, and the LED light sources have the advantages of obvious quick response, low energy consumption, stable chromaticity and the like. Light guide systems are used in large numbers in vehicle lights due to their advantages of low cost, low space requirements, and the like. However, due to the long overall length of the light guide system, in the process of light propagation, the material has different absorptance to light with different wavelengths, so that the color of the tail end of the light guide changes, and the color of the head part and the tail end of the light guide is greatly different.

For example, in the case of a PC light guide, the material itself has a high absorption rate for blue light, and when a vehicle lamp is turned on, the light at the head of the light guide tends to be white and the light at the tail tends to be yellow, because the blue light at the tail of the light guide is absorbed, and the light tends to be yellow.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lamp optical system for vehicle solves the problem of difference in light guide head and the terminal colour.

The utility model adopts the following technical proposal:

an optical system for a vehicle lamp includes a light guide 2, the light guide 2 having a first optical coupling surface 2c as a total reflection surface and a second optical coupling surface 2d as a light exit surface; the part of the first optical coupling surface 2c close to the tail end of the light guide 2 is coated with a colored paint layer of light color absorbed by the light guide material.

Preferably, the first optical coupling surface 2c is a tooth-shaped pattern structure, tooth-shaped pattern units are uniformly distributed along the length direction of the light guide, 1 or a plurality of tooth-shaped pattern units are used as color units, and each color unit is coated with a color paint layer with a corresponding color.

Furthermore, the end of the light guide is a third optical coupling surface 2b, and the color paint of each color unit is the same basic color and gradually becomes lighter from the third optical coupling surface 2b to the incident surface 2a.

Further, the same basic color is blue, and the light guide 2 is made of PC material.

Furthermore, the light source device also comprises a light source 1, and the light source 1 is aligned with the incident surface 2a.

Preferably, the light guide has an elongated shape.

Further, the light guide is in a straight strip shape.

Furthermore, other parts of the first optical coupling surface 2c than the parts near the end of the light guide 2 are also coated with said layer of color paint according to the division of said color units.

The beneficial effects of the utility model reside in that: the visual difference of the color of the light guide at the head and the tail end is solved.

Drawings

Fig. 1 is a front view of the vehicular lamp optical system of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

In the figure, 1 is a light source, 2 is a light guide, 2a is an incident surface, 2b is a third optical coupling surface, 2c is a first optical coupling surface, and 2d is a second optical coupling surface.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, a vehicle lamp optical system includes a light guide 2, the light guide 2 having a first optical coupling surface 2c as a total reflection surface and a second optical coupling surface 2d as a light exit surface; the part of the first optical coupling surface 2c close to the tail end of the light guide 2 is coated with a colored paint layer of light color absorbed by the light guide material.

In this embodiment, referring to fig. 2, the first optical coupling surface 2c is a tooth-like pattern structure, which has tooth-like pattern units uniformly arranged along the length direction of the light guide, and 1 or several tooth-like pattern units are used as color units, and each color unit is coated with a color paint layer with corresponding color.

In this embodiment, referring to fig. 2, the color paint of each color unit is the same basic color and gradually becomes lighter from the end of the light guide to the third optical coupling surface 2b and from the third optical coupling surface 2b to the incident surface 2a.

Specifically, the same basic color is blue, and the light guide 2 is made of PC material.

In this embodiment, referring to fig. 2, a light source 1 is further included, and the light source 1 is aligned with the incident surface 2a.

Specifically, the light guide is in the shape of a straight strip.

In this embodiment, other parts of the first optical coupling surface 2c than the parts near the end of the light guide 2 are also coated with the layer of colored paint according to the division of the color units.

The utility model provides a difference of light guide in head, terminal colour vision. The specific principle is as follows: after the light enters from the incident surface 2a, the light propagates in the light guide 2, and the absorptance of the corresponding materials of the light with different wavelengths is different, so that the head and tail colors are different. And after optical coupling surface 2c scribbles the colored paint of different colours, the absorptivity of colored paint layer itself to the same light of the colour of scribbling is lower, and is higher relatively to the absorptivity of other colours light, can balance the terminal colour change that leads to the light absorptivity inequality because of light guide own material through colored paint layer. Thereby realizing the function of adjusting the visual colors of different parts of the light guide, and the colored paint can be customized.

The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the above embodiments without departing from the general concept of the present invention, and these changes or improvements should fall within the scope of the present invention.

Claims

1. A vehicular lamp optical system characterized in that:

the device comprises a light guide (2), wherein the light guide (2) is provided with a first optical coupling surface (2c) serving as a total reflection surface and a second optical coupling surface (2d) serving as a light emitting surface;

the part of the first optical coupling surface (2c) close to the tail end of the light guide (2) is coated with a colored paint layer of light color absorbed by the light guide material.

2. A vehicular lamp optical system according to claim 1, characterized in that: the first optical coupling surface (2c) is of a tooth-shaped pattern structure, tooth-shaped pattern units are uniformly distributed along the length direction of the light guide, 1 or a plurality of tooth-shaped pattern units are used as color units, and each color unit is coated with a color paint layer with corresponding color.

3. A vehicular lamp optical system according to claim 2, characterized in that: the third optical coupling surface (2b) is arranged at the tail end of the light guide, and the color paint layers of the color units are the same basic color and gradually become lighter from the third optical coupling surface (2b) to the incident surface (2 a).

4. A vehicular lamp optical system according to claim 3, characterized in that: the same basic color is blue, and the light guide (2) is made of PC material.

5. A vehicular lamp optical system according to claim 3, characterized in that: the light source (1) is aligned with the incident surface (2 a).

6. A vehicular lamp optical system according to claim 1, characterized in that: the light guide is in the shape of a long strip.

7. A vehicular lamp optical system according to claim 6, characterized in that: the light guide is in the shape of a straight elongated bar.

8. A vehicular lamp optical system according to claim 3, characterized in that: the other parts of the first optical coupling surface (2c) are coated with the color paint layer according to the division of the color units except for the part close to the end of the light guide (2).