CN107893971A - The aplanatism heavy section casting of automobile tail light - Google Patents

Abstract

The purpose of the present invention is to provide a thick-walled part with equal optical path for automobile taillights. The light from the first LED light source is collimated by the first collimator and injected into the main body, then exits the main body, and then enters through the stepped light-emitting surface. The light from the second LED light source is collimated by the second collimator and then shoots into the body, and then exits through the rear reflective surface and the light-emitting surface; the two light rays are emitted The optical path to the front reference surface is equal, so that a uniform lighting effect can be obtained; the angle between the rear reflective surface and the upper surface of the two collimators increases the utilization of effective light; the stepped light exit surface is used in the The weight and volume of the thick-walled parts are reduced in the case of realizing equal optical paths, making the thick-walled parts lighter.

Description

Equal optical path thick-walled parts for automobile tail lights

technical field

The invention relates to the field of thick-walled automobile taillights, in particular to a thick-walled equi-optical path of automobile taillights with efficient and uniform lighting effect.

Background technique

With the rapid development of automobile lamp technology, in addition to the design of lamps that can strictly meet the requirements of regulations, vehicle customers are paying more and more attention to the appearance requirements of lamps, especially the lighting effect. To a certain extent , a beautiful appearance of headlights can quickly improve the visual experience of a car. For car tail lights, customers like the novel design of the position lights and the perfect lighting effect. Therefore, more and more thick-walled parts are used in automobile taillights, which have reached the requirements of transparency, uniformity and changeable shapes.

Although the existing thick-walled parts can meet the requirements of vehicle customers for the shape and appearance of taillights, most of the thick-walled parts have the phenomenon of large volume, low efficiency, heavy weight and uneven lighting effect. The thick-walled parts themselves are related to the design of total reflection.

Contents of the invention

In order to solve the above problems, the present invention provides a thick-walled part with equal optical path for automobile taillights. The first LED light source is collimated by the first collimator and injected into the body, then emitted out of the body, and then injected into the body through the stepped light-emitting surface. The light from the second LED light source is collimated by the second collimator and then shoots into the body, and then exits through the rear reflective surface and the light-emitting surface; the two light rays are emitted The light paths before reaching the reference surface are equal, so that a uniform lighting effect can be obtained, which solves the problems in the background technology.

The object of the present invention is to provide a thick-walled part of equal optical path for automobile taillights, which includes a body, and the bottom of the body is a first collimator and a second collimator arranged side by side, the first collimator and the second collimator The first LED light source and the second LED light source are respectively arranged under the collimator; the rear wall of the body is a rear reflection surface, and the front end of the body is a stepped light-emitting surface; the rear reflection surface is connected with the first collimator and the second collimator The upper surface is at an angle of 45°.

The light of the first LED light source is collimated by the first collimator and injected into the main body, then exits the main body, then enters the main body through the stepped light exit surface, and then exits through the rear reflection surface and the light exit surface; The light from the second LED light source is collimated by the second collimator and then enters the body, and then exits through the rear reflection surface and the light exit surface.

The further improvement is that: the front side of the body has a front reference surface, the light from the first LED light source and the second LED light source hits the front reference surface, and the light from the first LED light source and the second LED light source hits the front reference surface The process is equal.

A further improvement is that: the light paths of the light rays reaching the front reference surface of the first LED light source and the second LED light source are equal in the part inside the body, and the light paths in the part outside the body are equal.

A further improvement is that: the rear reflection surface is an equally bisected paraboloid.

A further improvement is that: the bottoms of the first collimator and the second collimator are concentrating surfaces, and the side walls are paraboloids.

A further improvement is that: the edge distance between the first collimator and the second collimator is 1mm.

A further improvement is: the body is made of polycarbonate or polymethyl methacrylate.

Beneficial effects of the present invention: the light of the first LED light source in the present invention is collimated by the first collimator and then enters the body, then exits the body, enters the body through the stepped light-emitting surface, and then passes through the back reflection The light from the second LED light source is collimated by the second collimator and then enters the main body, and then is emitted through the rear reflection surface and the light-emitting surface; the optical distances of the two light rays reaching the front reference surface are equal , so that a uniform lighting effect can be obtained; the angle between the rear reflective surface and the upper surface of the two collimators is 45° to increase the utilization rate of effective light; The weight and volume of the thick-walled parts are reduced, making the thick-walled parts lighter.

Description of drawings

Fig. 1 is a structural diagram of the present invention.

Among them: 1-body, 2-first collimator, 3-second collimator, 4-first LED light source, 5-second LED light source, 6-back reflective surface, 7-light emitting surface, 8-front Reference surface, 9-first ray, 10-second ray.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

As shown in Figure 1, this embodiment provides a thick-walled part of equal optical path for automobile taillights, which includes a body 1, the bottom of which is a first collimator 2 and a second collimator 3 arranged side by side in front and behind, and the second collimator 3 A first LED light source 4 and a second LED light source 5 are arranged below a collimator 2 and a second collimator 3; the rear wall of the body 1 is a rear reflection surface 6, and the front end of the body 1 is a stepped light-emitting surface 7; The above-mentioned rear reflection surface 6 forms an angle of 45° with the upper surfaces of the first collimator 2 and the second collimator 3 . The light from the first LED light source 4 is collimated by the first collimator 2 and then enters the body 1, then exits the body 1, enters the body 1 through the stepped light-emitting surface 7, and then passes through the back reflection The light from the second LED light source 5 is collimated by the second collimator 3 and then enters the body 1 , and then exits through the rear reflection surface 6 and the light-emitting surface 7 . There is a front reference surface 8 on the front side of the body 1, the light from the first LED light source 4 and the second LED light source 5 hits the front reference surface 8, and the first LED light source 4 and the second LED light source 5 hit the front reference surface The light paths on 8 are equal. The light paths of the first LED light source 4 and the second LED light source 5 reaching the front reference surface 8 are equal in the part inside the main body 1 and equal in the part outside the main body 1 . The rear reflection surface 6 is an equally divided paraboloid. The bottoms of the first collimator 2 and the second collimator 3 are converging surfaces, and the side walls are parabolic surfaces. The edge distance between the first collimator 2 and the second collimator 3 is 1 mm. The body 1 is made of polycarbonate or polymethyl methacrylate.

The refractive index of the thick-walled part in this embodiment is set to n, and the first light 9 and the second light 10 are selected to be emitted from the same position of the first collimator 2 and the second collimator 3 respectively. The first light 9 is the light emitted by the first LED light source 4, the optical path of the first light 9 is L4, L5, L6, L7, L8, wherein L4, L6 and L7 are the internal paths of the thick-walled part, and L5 and L8 are the external air paths of thick-walled parts, so the total optical path sum is n*(L4+L6+L7)+L5+L8. Similarly, the light emitted by the second light ray 10 from the second LED light source 5, the optical path of the second light 10 is L1, L2, L3, wherein L1 and L2 are the internal paths of the thick-walled part, and L3 is the outside of the thick-walled part Air path, so the total optical path sum is n*(L1+L2)+L3. By designing the height and width of the stepped light-emitting surface 7, L1+L2=L4+L6+L7, L3=L5+L8 to obtain n*(L1+L2)+L3 = n*(L4+L6+L7) +L5+L8, that is, the optical distances of the first light 9 and the second light 10 are equal. Then all light losses reaching the front reference surface 8 are the same, that is, the distribution of light intensity is equal, and the effect of uniform lighting is realized.

The light from the first LED light source 4 is collimated by the first collimator 2 and then enters the body 1, then exits the body 1, enters the body through the stepped light-emitting surface 7, and then passes through the rear reflection surface 6 and The light from the light-emitting surface 7 is emitted; the light of the second LED light source 5 is collimated by the second collimator 3 and then injected into the body 1, and then emitted through the rear reflection surface 6 and the light-emitting surface 7; the two light rays are emitted to reach the front reference surface The optical paths of 8 are equal, so that a uniform lighting effect can be obtained; the angle between the rear reflective surface 6 and the upper surfaces of the two collimators is 45°, which increases the utilization rate of effective light; In the case of equal optical path, the weight and volume of the thick-walled parts are reduced, making the thick-walled parts lighter.

Claims (8)

1. An equal optical path thick-walled part of an automobile tail light, characterized in that it includes a body (1), and the bottom of the body (1) is a first collimator (2) and a second collimator ( 3), the first LED light source (4) and the second LED light source (5) are respectively arranged under the first collimator (2) and the second collimator (3); the rear wall of the body (1) is a rear reflection surface (6), the front end of the body (1) is a stepped light-emitting surface (7); the rear reflective surface (6) is 45° from the upper surface of the first collimator (2) and the second collimator (3) ° angle. 2. The equal optical path thick-walled part of the automobile tail light according to claim 1, characterized in that: the light of the first LED light source (4) is collimated by the first collimator (2) and then enters the body (1) , and then projected out of the body (1), and then injected into the body (1) through the stepped light-emitting surface (7), and then emitted through the rear reflective surface (6) and the light-emitting surface (7); the second LED light source (5 ) is collimated by the second collimator (3) and then enters the body (1), and then exits through the rear reflection surface (6) and the light exit surface (7). 3. The equal optical path thick-walled part of the automobile tail light according to claim 2, characterized in that: the front side of the body (1) has a front reference surface (8), the first LED light source (4) and the second LED light source (5 ) light rays impinge on the front reference surface (8), and the light paths of the first LED light source (4) and the second LED light source (5) impinging on the front reference surface (8) are equal. 4. The equal optical path thick-walled part of the automobile tail light according to claim 3, characterized in that: the light rays of the first LED light source (4) and the second LED light source (5) reaching the front reference surface (8) are in the body ( 1) The optical path of the inner part is equal, and the optical path of the part outside the body (1) is equal. 5. The thick-walled part with equal optical path of the automobile tail light according to claim 1, characterized in that: the rear reflective surface (6) is an equally divided paraboloid. 6. The thick-walled part with equal optical path of the automobile tail light according to claim 1, characterized in that: the bottoms of the first collimator (2) and the second collimator (3) are concentrating surfaces, and the side walls are parabolic surfaces. 7 . The thick-walled part of equal optical path for automobile tail lights according to claim 1 , characterized in that: the edge distance between the first collimator ( 2 ) and the second collimator ( 3 ) is 1 mm. 8 . The equal optical path thick-walled part of an automobile tail light according to claim 1 , characterized in that: the body ( 1 ) is made of polycarbonate or polymethyl methacrylate.