Light source combined structure

Abstract

The present invention relates to the technical field of vehicle lighting fixtures, and more particularly to a light source coupling structure including an upper reflector having an incident chamber housing a light source, and a lower reflector disposed below and connected to the upper reflector. Both the upper and lower reflectors have parabolic guide lines, which collimate light emitted from the light source and then emit the parallel light. The upper reflector includes a plurality of first V-shaped reflective surfaces arranged in sequence around its circumference. The first V-shaped reflective surfaces undergo two internal total reflections, resulting in approximately parallel collimated reflection of some of the light rays that cannot be totally reflected from the focal point. This allows the light rays to satisfy the total reflection condition at any of the first V-shaped reflective surfaces. This replaces aluminum-plated reflective surfaces, avoiding the problem of unstable surface reflectivity due to the aluminum plating process. It also converts light rays diverging from the light source into parallel light, improving light efficiency. This reflective structure breaks the conventional shape of reflective surfaces, resulting in a clear and beautiful visual effect.

Description

[Technical Field]

[0001] The present invention relates to the technical field of vehicle lighting, and more particularly to a light source coupling structure. [Background technology]

[0002] Currently, with the rapid development of the automotive lighting industry, the shapes of lighting fixtures are constantly changing, but at the same time, the instability of the production process has become a problem that automotive lighting fixture manufacturers need to solve as soon as possible.In the field of optical design, aluminum-plated reflective surface structures are a commonly used method, but the instability of the aluminum plating process has led to problems such as inconsistent aluminum plating film thickness and blurred aluminum plating boundaries, which not only constantly pose difficulties to the production of automotive lighting fixtures, but also increase the design costs of the aluminum plating process itself.

[0003] Generally, the light emitted from an LED conforms to a Lambertian distribution, where the light intensity is strongest in the middle and gradually decreases as the light angle increases. Currently, when uniformity is required in many lighting fixtures, this distribution does not meet the requirements. Therefore, it is necessary to consider how to distribute the light emitted from an LED uniformly.

[0004] To address this issue, several optical structures have emerged in the industry. See Figure 1. These structures effectively solve this issue, distributing the light emitted from the LED so that it is parallel in the vertical plane and uniformly diffuses 360 degrees in the horizontal plane. However, vehicle lamps generally do not require a 360-degree distribution of light rays; a 180-degree distribution is more appropriate. Therefore, additional structures must be added to optimize the light direction.

[0005] Currently, reflective means that are not plated with aluminum are used, and the materials commonly used for such reflective means that are not plated with aluminum are PC or PMMA. The critical angle of total reflection for PC is 39°, and for PMMA it is 42°. Referring to Figure 2, most of the light rays on the left side of the y-axis are smaller than the critical angle of total reflection and do not satisfy the conditions for total reflection of the light rays. As a result, the light rays pass through the material and exit, resulting in wasted light. Summary of the Invention [Problem to be solved by the invention]

[0006] To solve the technical problems in the prior art, the present invention provides a light source coupling structure. [Means for solving the problem]

[0007] The technical means adopted by the present invention to solve the technical problem includes an upper reflective part provided with an incident chamber accommodating a light source, and a lower reflective part provided below and connected to the upper reflective part, the guidelines of the upper and lower reflective parts are both parabolic, and organize the light beams emitted from the light source into parallel beams before emitting them, the upper reflective part includes a plurality of first V-shaped reflective surfaces arranged in sequence along its circumferential direction, the first V-shaped reflective surface includes two surfaces arranged at an angle opposite to each other so that all the light beams emitted from the light source and received by the first V-shaped reflective surface satisfy the total reflection condition, and the light beams emitted from the light source are irradiated onto the first V-shaped reflective surface before being organized into parallel beams before emitting them, resulting in a light source coupling structure.

[0008] According to the light source coupling structure of the present invention, a portion of the incident light beam emitted from the light source is incident on the upper reflector and a portion is incident on the lower reflector. Since both the upper and lower reflectors have parabolic curves, the light beams that satisfy the total reflection condition can be collimated and emitted. Because the lower reflector is farther from the light source, more light beams satisfy the total reflection condition at the lower reflector. However, because the upper reflector is closer to the light source, the included angle between the lower reflector and the upper reflector does not reach the critical angle for total reflection. In this case, the light beam is first incident on one side of the first V-shaped reflecting surface and then totally reflected by the other side of the first V-shaped reflecting surface. The two internal total reflections by the first V-shaped reflecting surface allow the portion of the light beam that cannot be totally reflected from the focal point to be reflected in a nearly parallel collimated manner. Furthermore, because both sides of the first V-shaped reflecting surface are inclined, the light beam can satisfy the total reflection condition at either side of the first V-shaped total reflecting surface. This structure avoids the problem of unstable surface reflectivity caused by the aluminum plating process, and converts the light rays emitted from a point light source into parallel rays as much as possible, thereby improving light efficiency.In addition, this reflective structure breaks the mold of ordinary reflective surfaces, resulting in a clear and beautiful visual effect.

[0009] Furthermore, the upper reflecting portion is It is formed in an arc shape in plan view. .

[0010] Furthermore, the lower reflecting portion is It is formed in an arc shape in plan view. .

[0011] Furthermore, the first V-shaped reflective surface includes a first surface and a second surface, and the first surface totally reflects a portion of the received light beams onto the second surface, and then converts the light beams into parallel rays and emits them via the second surface; and the second surface totally reflects a portion of the received light beams onto the first surface, and then converts the light beams into parallel rays and emits them via the first surface.

[0012] Furthermore, the lower reflecting portion has a smoothly curved surface.

[0013] Furthermore, the lower reflecting portion includes a plurality of second V-shaped reflecting surfaces arranged in sequence along the circumferential direction thereof.

[0014] Furthermore, the included angle between the first surface and the second surface is 80-100 degrees, and the included angle between adjacent surfaces of the first V-shaped reflecting surface is 80-100 degrees.

[0015] Furthermore, the included angle between two surfaces of the second V-shaped reflecting surface is 80-100 degrees, and the included angle between adjacent surfaces of the adjacent second V-shaped reflecting surface is 80-100 degrees.

[0016] Furthermore, an entrance surface that is a semicircular curved surface and is located below the light source is provided within the entrance chamber.

[0017] Furthermore, the material of the upper and lower reflecting portions is PMMA or PC. [Effects of the Invention]

[0018] The beneficial effects of the present invention are as follows: 1. The first V-shaped reflective surface undergoes two internal total reflections, which allows a portion of the light beam that cannot be totally reflected from the focal point to be reflected in a nearly parallel, collimated form, and any surface of the first V-shaped reflective surface can cause the light beam to satisfy the total reflection conditions. This structure replaces aluminum-plated reflective surfaces, avoiding the problem of unstable surface reflectivity caused by the aluminum plating process. On the other hand, it can convert the light beam diverging from a point light source into parallel light, improving light efficiency. This reflective structure also breaks the mold of ordinary reflective surfaces, resulting in a clear and beautiful visual effect. 2. The upper and lower reflecting parts are arranged in an arc shape along their own circumferential direction, and the arc-shaped reflecting surface can reflect the light rays at various angles so that the emitted light rays form a uniform semicircular light band, thereby increasing the divergence area of ​​the light rays.

[0019] The invention will now be further described with reference to the figures and examples. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram showing a prior art in which light rays are uniformly distributed in a 360-degree diffused manner in a horizontal plane. [Figure 2] FIG. 1 is a schematic diagram showing a total reflection critical angle in the prior art. [Figure 3] FIG. 2 is a perspective view showing a light source coupling structure according to the present invention. [Figure 4] FIG. 2 is a front view showing the light source coupling structure of the present invention. [Figure 5] FIG. 2 is a top view showing a light source coupling structure according to the present invention. [Figure 6] FIG. 2 is a diagram illustrating the principle of light path, showing light reflection by an upper reflecting portion in the present invention. [Figure 7] FIG. 2 is a top view showing the path of total reflection of light by the upper reflecting portion in the present invention. [Figure 8] 3 is a schematic diagram showing an upper reflecting portion having a smoothly curved surface in the present invention. FIG. [Figure 9] FIG. 2 is a schematic diagram showing a second V-shaped total reflection surface in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will now be described in more detail with reference to the drawings, all of which are simplified schematic diagrams and merely serve to explain the basic structure of the present invention in outline, and therefore only show the components relevant to the present invention.

[0022] The present invention discloses a light source coupling structure.

[0023] 3 to 9, the light source coupling structure includes an upper reflecting part 2 and a lower reflecting part 3. An incident chamber for accommodating a light source 4 is provided in the upper reflecting part 2. An incident surface 1 is provided in the incident chamber. The incident surface 1 is a semicircular curved surface formed by rotating a single curve 180 degrees along a vertical line where the bottom connection point is located, and the incident surface 1 is located below the light source 4. The lower reflecting part 3 is provided below the upper reflecting part 2 and is connected to the upper reflecting part 2. The guide lines of the upper reflecting part 2 and the lower reflecting part 3 are both parabolic, and they organize the received light rays into parallel rays and emit them.

[0024] The upper reflecting portion 2 is arranged in an arc shape along its circumferential direction, and the lower reflecting portion 3 is arranged in an arc shape along its circumferential direction, and the arc-shaped reflecting surface can reflect light rays at various angles so that the emitted light rays form a uniform semicircular light band, thereby increasing the divergence area of ​​the light rays.

[0025] The upper reflecting portion 2 includes a plurality of first V-shaped reflecting surfaces 21 arranged in sequence along its circumferential direction. Each first V-shaped reflecting surface 21 includes a first surface 211 and a second surface 212, and the included angle between the first surface 211 and the second surface 212 is 80-100 degrees, and the included angle between adjacent surfaces of adjacent first V-shaped reflecting surfaces 21 is also 80-100 degrees. Because the first surface 211 and the second surface 212 are both inclined, the included angle between the light ray emitted from the incident surface 1 and the first surface 211 or the second surface 212 is smaller than the critical angle for total reflection, and the light ray can be totally reflected by the first surface 211 or the second surface 212. The first surface 211 totally reflects a portion of the received light rays to the second surface 212, which then converts the light rays into parallel rays and emits them via the second surface 212, while the second surface 212 totally reflects a portion of the received light rays to the first surface 211, which then converts the light rays into parallel rays and emits them via the first surface 211. Since the lower reflecting portion 3 is far from the light source 4, the requirement can be met by the lower reflecting portion 3 having a smoothly curved surface.

[0026] Referring to FIG. 5, the light reflected by the upper reflecting portion 2 and the lower reflecting portion 3 is finally directed in one direction, which allows for more efficient lighting and further increases the brightness of the vehicle lamp.

[0027] In another embodiment, the upper reflecting portion 2 is a smoothly curved surface.

[0028] In another embodiment, the lower reflecting part 3 includes a plurality of second V-shaped reflecting surfaces arranged in sequence along its circumferential direction, and the second V-shaped reflecting surfaces have the same structure as the first V-shaped reflecting surface 21. The included angle between two surfaces of the second V-shaped reflecting surfaces is 80-100 degrees, and the included angle between adjacent surfaces of adjacent second V-shaped reflecting surfaces is 80-100 degrees.

[0029] The upper reflecting portion 2 and the lower reflecting portion 3 are made of PMMA or PC.

[0030] Operating principle: Some of the incident light rays emitted from the light source 4 are incident on the upper reflecting portion 2, and some are incident on the lower reflecting portion 3. Because the guide lines of the upper reflecting portion 2 and the lower reflecting portion 3 are both parabolic, the light rays that satisfy the condition for total reflection can be organized into parallel light rays and emitted. Because the lower reflecting portion 3 is far from the light source 4, more light rays satisfy the condition for total reflection at the lower reflecting portion 3. However, because the upper reflecting portion 2 is closer to the light source 4, the included angle between the lower reflecting portion 3 and the upper reflecting portion 2 does not reach the critical angle for total reflection for most of the light rays. At this time, two internal total reflections by the first V-shaped reflecting surface 21 can be performed to reflect the portion of the light rays that cannot be totally reflected from the focus in a nearly parallel, collimated manner, and also enable the light rays to satisfy the condition for total reflection by either surface of the first V-shaped reflecting surface 21. This structure avoids the problem of unstable surface reflectivity caused by the aluminum plating process, and converts the light rays emitted by the point light source 4 into parallel rays, thereby improving light efficiency. The arc-shaped reflective surface reflects the light rays at various angles so that the emitted light rays form a uniform semicircular light band, thereby increasing the divergence area of ​​the light rays. This reflective structure also breaks the mold of ordinary reflective surfaces, resulting in a clear and beautiful visual effect.

[0031] It goes without saying that, based on the teachings of the preferred embodiments of the present invention and the above description, those skilled in the art can make various changes and modifications without departing from the scope of the technical spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, but should be determined by the scope of the claims. [Explanation of symbols]

[0032] 1 Entrance plane 2 Upper reflector 21 1st V-shaped reflective surface 211 Page 1 212 2nd page 3 Lower reflector 31 2nd V-shaped total reflection surface 4 light source

Claims

1. The upper reflecting section (2) is provided with an incident chamber that houses a light source (4), and the lower reflecting section (3) is provided below the upper reflecting section (2) and is connected to the upper reflecting section (2). The guide lines of the upper reflecting section (2) and the lower reflecting section (3) are both parabolic, and light rays emitted from the light source (4) are organized into parallel light rays and emitted. The upper reflecting section (2) includes a plurality of first V-shaped reflecting surfaces (21) arranged in order along its circumferential direction, and the first V-shaped reflecting surfaces (21) are arranged to receive light from the light source (4). a first V-shaped reflecting surface (21) that is formed of a first surface (211) and a second surface (212), the angle between the first surface (211) and the second surface (212) being 80-100 degrees, and the angle between adjacent surfaces of adjacent first V-shaped reflecting surfaces (21) being 80-100 degrees.

2. 2. The light source coupling structure according to claim 1, wherein the upper reflecting portion (2) is formed to have an arc shape in a plan view.

3. 2. The light source coupling structure according to claim 1, wherein the lower reflecting portion (3) is formed to have an arc shape in a plan view.

4. 2. The light source coupling structure according to claim 1, wherein the first surface (211) totally reflects a portion of the received light beams to the second surface (212), and then converts the light beams into parallel rays and emits them via the second surface (212); and the second surface (212) totally reflects a portion of the received light beams to the first surface (211), and then converts the light beams into parallel rays and emits them via the first surface (211).

5. 2. The light source coupling structure according to claim 1, wherein the lower reflecting portion (3) has a smoothly curved surface.

6. 2. The light source coupling structure according to claim 1, wherein the lower reflecting portion (3) includes a plurality of second V-shaped reflecting surfaces arranged in sequence along the circumferential direction of the lower reflecting portion (3).

7. 7. The light source coupling structure of claim 6, wherein the angle between two surfaces of the second V-shaped reflecting surface is 80-100 degrees, and the angle between adjacent surfaces of the adjacent second V-shaped reflecting surface is 80-100 degrees.

8. 2. The light source coupling structure according to claim 1, wherein the entrance chamber has an entrance surface (1) that is a semicircular curved surface and is located below the light source (4).

9. 2. The light source coupling structure according to claim 1, wherein the upper reflector (2) and the lower reflector (3) are made of PMMA or PC.

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