CN107893971B - Aplanatic thick-wall part of automobile tail lamp - Google Patents

Abstract

The purpose of the present invention is to provide an equal optical path thick-walled component for a car taillight, wherein light from a first LED light source is collimated by a first collimator and then incident on a main body, then incident on the main body through a stepped light-emitting surface, and then incident on the main body through a rear reflective surface and the light-emitting surface; light from a second LED light source is collimated by a second collimator and then incident on the main body, then incident on the rear reflective surface and the light-emitting surface; the optical paths of the two light rays incident to a front reference surface are equal, so that a uniform lighting effect can be obtained; the rear reflective surface and the upper surfaces of the two collimators form an angle of 45°, thereby increasing the utilization rate of effective light; the use of a stepped light-emitting surface reduces the weight and volume of the thick-walled component while achieving equal optical paths, thereby making the thick-walled component lighter.

Description

Iso-optical path thick-walled parts for automobile taillights

Technical field

The invention relates to the field of thick-walled parts for automobile taillights, and in particular to an equal-optical-path thick-walled part for automobile taillights with efficient and uniform lighting effects.

Background technique

With the rapid development of automobile lighting technology, in addition to the need for designed lights to strictly meet regulatory requirements, vehicle customers are paying more and more attention to the appearance of lights, especially the lighting effect. To some extent, a beautiful appearance of lights can quickly improve the visual experience of a car. For car taillights, customers like position lights with novel designs and perfect lighting effects. Therefore, more and more thick-walled parts are used in car taillights, which have met the requirements of transparency, uniformity, and varied shapes.

Although existing thick-walled parts can meet vehicle customers' requirements for taillight shape and appearance, most thick-walled parts are larger in size, less efficient, heavier and have uneven lighting effects, which is inconsistent with The thick-walled parts themselves are designed to utilize total reflection.

Contents of the invention

In order to solve the above problems, the present invention provides an equal-optical-path thick-walled component of a car taillight. The first LED light source is collimated by the first collimator and then injected into the body, and then emitted out of the body, and then injected through the stepped light-emitting surface. into the main body, and then emitted through the back reflective surface and the light emitting surface; the light of the second LED light source is collimated by the second collimator and then emitted into the main body, and then emitted through the back reflective surface and the light emitting surface; the two light rays emit The optical path to the front reference surface is 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 an equal optical path thick-walled member for a car taillight, which includes a body, the bottom of which is a first collimator and a second collimator arranged side by side, the first collimator and the second collimator A first LED light source and a second LED light source are respectively provided below the straightener; the rear wall of the body is a rear reflective surface, and the front end of the body is a stepped light-emitting surface; the rear reflective surface is in contact with the first collimator and the second collimator The upper surface is at a 45° angle.

The light from the first LED light source is collimated by the first collimator and then injected into the body, and then emitted out of the body, and then injected into the body through the stepped light-emitting surface, and then emitted through the rear reflective surface and the light-emitting surface; The light of the second LED light source is collimated by the second collimator and then injected into the body, and then emitted through the rear reflective surface and the light exit surface.

A further improvement is that: the front side of the main body has a front reference surface, and the light from the first LED light source and the second LED light source are projected onto the front reference surface, and the optical paths of the first LED light source and the second LED light source onto the front reference surface are equal.

A further improvement is that the light path of the first LED light source and the second LED light source that reaches the front reference surface is equal to the part inside the body, and the light path is equal to the part outside the body.

A further improvement is that: the rear reflection surface is an equally divided parabola.

A further improvement is that the bottoms of the first collimator and the second collimator are light-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 1 mm.

A further improvement is that the body is made of polycarbonate or polymethylmethacrylate.

Beneficial effects of the present invention: The light from the first LED light source of the present invention is collimated by the first collimator and then injected into the body, and then emitted out of the body, and then injected into the body through the stepped light-emitting surface, and then passed through the back reflection The light emitted from the second LED light source is collimated by the second collimator and then emitted into the body, and then emitted through the rear reflective surface and the light emitting surface; the optical path lengths of the two light rays emitted to reach the front reference surface are equal , in this way, a uniform lighting effect can be obtained; the back reflection surface and the upper surface of the two collimators are at an angle of 45°, which increases the utilization rate of effective light; the use of a stepped light exit surface reduces the light emission while achieving equal optical path lengths. The weight and volume of thick-walled parts are reduced, making thick-walled parts lighter.

Description of drawings

Figure 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-rear 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 in detail below with reference to examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

As shown in Figure 1, this embodiment provides an equal optical path thick-walled component for a car taillight, which includes a body 1. The bottom of the body 1 is a first collimator 2 and a second collimator 3 arranged side by side in front and back. A first LED light source 4 and a second LED light source 5 are respectively provided below a collimator 2 and a second collimator 3; the rear wall of the body 1 is a rear reflective surface 6, and the front end of the body 1 is a stepped light-emitting surface 7; so The back reflective 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 injected into the body 1, and then emitted out of the body 1, and then injected into the body 1 through the stepped light-emitting surface 7, and then passed through the back reflection. The light from the second LED light source 5 is collimated by the second collimator 3 and then emitted into the body 1 , and then emitted through the rear reflective surface 6 and the light exit 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 is incident on the front reference surface 8. The first LED light source 4 and the second LED light source 5 are incident on the front reference surface. The optical path lengths on 8 are equal. The light path of the first LED light source 4 and the second LED light source 5 reaching the front reference surface 8 is equal to the part inside the body 1 and the light path is equal to the part outside the body 1 . The back reflective surface 6 is an equally divided paraboloid. The bottoms of the first collimator 2 and the second collimator 3 are light-concentrating surfaces, and the side walls are paraboloids. The edge distance between the first collimator 2 and the second collimator 3 is 1 mm. The body 1 is made of polycarbonate or polymethylmethacrylate.

Set the refractive index n of the thick-walled part in this embodiment, and select the first light 9 and the second light 10 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 paths traveled by the first light 9 are L4, L5, L6, L7, and L8, where L4, L6, and L7 are the internal paths of the thick-walled parts, 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. In the same way, the light path of the second light 10 emitted by the second LED light source 5 is L1, L2, and L3, where L1 and L2 are the internal paths of the thick-walled component, and L3 is the external path of the thick-walled component. 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 is obtained, thus n*(L1+L2)+L3 = n*(L4+L6+L7) +L5+L8, that is, the optical path lengths of the first light 9 and the second light 10 are equal. Then the loss of all light reaching the front reference surface 8 is the same, that is, equal light intensity distribution, achieving a uniform lighting effect.

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 , and then enters the body through the stepped light-emitting surface 7 , and then passes through the rear reflective surface 6 and The light emitted from the light exit surface 7; 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 reflective surface 6 and the light exit surface 7; the two light rays emit and reach the front reference surface 8 have the same optical path, so that a uniform lighting effect can be obtained; the rear reflective surface 6 is at a 45° angle with the upper surfaces of the two collimators, which increases the utilization of effective light; the step-shaped light exit surface 7 is used to achieve Under the condition of equal optical path length, the weight and volume of thick-walled parts are reduced, making thick-walled parts lighter.

Claims (5)

1. A thick-walled member with equal optical path length for automobile taillights, characterized in that: it includes a body (1), and the bottom of the body (1) is a first collimator (2) and a second collimator (2) arranged side by side at the front and back. 3), the first LED light source (4) and the second LED light source (5) are respectively provided below the first collimator (2) and the second collimator (3); the rear wall of the body (1) is a rear reflective surface (6), the front end of the body (1) is a stepped light-emitting surface (7); the back reflection surface (6) is at an angle of 45° to the upper surfaces of the first collimator (2) and the second collimator (3). ° angle; The light from the first LED light source (4) is collimated by the first collimator (2) and then injected into the body (1), and then emitted out of the body (1), and then emitted through the stepped light-emitting surface (7). Enters the body (1), and then exits through the rear reflective surface (6) and the light exit surface (7); the light from the second LED light source (5) is collimated by the second collimator (3) and then enters the body (1) ), and then emit through the rear reflective 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) is incident on the front reference surface (8). The first LED light source (4) ) is equal to the optical path of the second LED light source (5) hitting the front reference surface (8); The optical path lengths of the light beams from the first LED light source (4) and the second LED light source (5) reaching the front reference surface (8) inside the body (1) are equal, and the optical path lengths of the light beams outside the body (1) are equal. . 2. The thick-walled member with equal optical path length for automobile taillight according to claim 1, characterized in that: the rear reflective surface (6) is an equally divided paraboloid. 3. The equal optical path thick-walled member of the automobile taillight according to claim 1, characterized in that: the bottoms of the first collimator (2) and the second collimator (3) are light-concentrating surfaces, and the side walls are paraboloids. 4. The equal-optical path thick-walled member of the automobile taillight according to claim 1, characterized in that: the edge distance between the first collimator (2) and the second collimator (3) is 1 mm. 5. The iso-optical path thick-walled part of the automobile taillight according to claim 1, characterized in that: the body (1) is made of polycarbonate or polymethylmethacrylate.