Vehicle lamp light guide structure

Abstract

The utility model discloses a vehicle lamp light guide structure, which comprises a printed circuit board (PCB), a light guide body and a support, at least one light-emitting diode (LED) light source is arranged on the PCB, and the light guide body is arranged on the support. The light inlet end of the light guide body is provided with a condenser directly facing an LED light source, the end, away from the condenser and located in the collimation direction, of the light guide body is provided with a light distribution slope, the tail end of the light guide body extends in the reflection direction of the light distribution slope, and the tail end face of the light guide body is provided with light guide teeth; light emitted by the LED light source can be collimated by the condenser, enters the light guide body for conduction, is totally reflected by the light distribution slope and then is transmitted to the light guide teeth at the tail end to lighten the whole. The LED light guide is small in size and convenient to install, the light guide can be made to be in an L-shaped turning effect through a small number of LEDs, the optical utilization rate is high, and the lighting effect at the corner is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a vehicle light guide structure. Background Technology

[0002] Traditional automotive headlights typically employ a planar direct light-injection scheme, resulting in low luminous efficiency and some light rays not being effectively guided to the target tooth surface, leading to poor light distribution uniformity. Using a focusing structure can effectively ensure focused light and appropriately improve luminous efficiency. However, current automotive headlights come in various shapes and are gradually trending towards miniaturization and flattening, posing a challenge to traditional headlight guide structures.

[0003] Traditional light guide structures are currently greatly affected by their length and size. As the length increases, the brightness of the light source decreases, especially at the end of the light guide. Therefore, many light guide structures extend the optical structure at the end or increase the number of LEDs to improve the overall lighting uniformity. However, this increases energy consumption, size, and cost, makes installation more difficult, and can easily lead to localized bright spots or dark areas at the light guide head. Some light guide structures use rounded transitions in the light guide section to reduce size and facilitate installation, but dark areas still appear at the light guide bends, resulting in less than ideal overall lighting uniformity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a vehicle light guide structure that is small in size, easy to install, and can make the light guide present an L-shaped bend effect with a small number of LEDs, with high optical utilization and more uniform lighting effect at the corner.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A vehicle light guide structure includes a PCB board, a light guide body and a bracket, wherein at least one LED light source is disposed on the PCB board and the light guide body is mounted on the bracket;

[0007] The light guide body has a light-concentrating device formed at the light-inlet end, which faces the LED light source. The end of the light guide body away from the light-concentrating device and located in the collimation direction has a light-distributing inclined surface. The tail end of the light guide body extends in the reflection direction of the light-distributing inclined surface. Light guide teeth are formed on the end face of the light guide body.

[0008] The light emitted by the LED light source can be collimated by the condenser and transmitted into the light guide body. After total internal reflection by the light distribution slope, it is transmitted to the light guide teeth at the end to illuminate the whole.

[0009] Furthermore, the optical guide body has an L-shaped structure.

[0010] Furthermore, the concentrator has a composite curved surface or parabolic surface structure.

[0011] Furthermore, the angle between the light distribution slope and the collimation direction of the condenser is 30°-60°.

[0012] Furthermore, a light distribution pattern is formed on the light distribution inclined surface.

[0013] Furthermore, the light distribution pattern is a groove or a raised structure.

[0014] Furthermore, the geometric units of the light distribution pattern are rhombuses, trapezoids, or serrated shapes.

[0015] Furthermore, the size of the light distribution pattern geometric unit is 0.1-1mm.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] 1. This utility model uses a light guide structure combining a concentrator and a light distribution slope to collide the light emitted by the LED light source into the light guide body through the concentrator, and then transmit it to the light guide teeth at the end after total internal reflection by the light distribution slope to illuminate the whole. After secondary adjustment of the light distribution pattern, the utilization rate is further improved. The entire light guide can be lit with a small number of LEDs. It not only has high light efficiency, but also has the advantages of small size, simple structure and low cost.

[0018] 2. This utility model differs from existing light guide structures by using a light distribution slope as the corner of the light guide. The angle between the light distribution slope and the collimation direction of the condenser is 30°-60°. The tail end of the light guide body extends in the reflection direction of the light distribution slope and is combined with the light guide teeth formed on the end face of the light guide body, which makes the lighting effect at the corner better and avoids problems such as dark areas or bright spots, and the overall lighting is more uniform.

[0019] 3. The light guide structure of this utility model, which combines a concentrator and a light distribution bevel, can take into account both the needs of light concentration and diffusion. The light guide head is less likely to have local bright spots or dark areas, and the light distribution uniformity is good. The overall L-shaped design allows the light guide to have an L-shaped bend effect, saving lateral space and ensuring that the light-emitting area at the corner is not affected by the length of the light guide.

[0020] 4. While ensuring uniform lighting effect and improving luminous efficiency, this utility model simplifies the shape of the light guide and saves internal space, making installation more convenient. It is applicable to various types of LEDs, lamp holders, laser light sources, etc., and can be used and installed with more types of lamps. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a side view of an embodiment of the present utility model;

[0023] Figure 3 This is a cross-sectional view and optical path diagram of an embodiment of the present utility model;

[0024] Among them, 1. PCB board; 1-1. LED light source; 2. light guide body; 2-1. Concentrator; 2-2. Light distribution bevel; 2-3. Light guide teeth; 3. bracket. Detailed Implementation

[0025] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] like Figure 1-3 As shown in this embodiment, a vehicle light guide structure is provided, which mainly consists of a PCB board 1, a light guide body 2, and a bracket 3. An LED light source 1-1 is mounted on the PCB board 1, and the light guide body 2 is mounted on the bracket 3. A concentrator 2-1, facing the LED light source 1-1, is formed at the light-incident end of the light guide body 2. The concentrator 2-1 can be a composite curved surface or a parabolic surface structure, converging the divergent light emitted by the LED light source 1-1 into a parallel or quasi-parallel beam. A light distribution slope 2-2 is formed at the end of the light guide body 2 away from the concentrator 2-1 and in the collimation direction, and the tail end of the light guide body 2 extends in the reflection direction of the light distribution slope 2-2. Light guide teeth 2-3 are formed on the end face of the light guide body 2. With this design, when lit, the light emitted by the LED light source 1-1 can be collimated by the condenser 2-1 and conducted into the light guide body 2. After total internal reflection by the light distribution inclined surface 2-2, it is transmitted to the light guide teeth 2-3 at the end to light up the whole. The light guide structure of this embodiment has a higher utilization rate after secondary adjustment of the light distribution pattern. A small number of LEDs can light up the whole light guide. It not only has high light efficiency, but also has the advantages of small size, simple structure and low cost.

[0027] Specifically, in this embodiment, the light guide body 2 has an overall L-shaped structure, and the angle between the light distribution slope 2-2 and the collimation direction of the concentrator 2-1 is 30°-60°, as in this embodiment. Figure 3 The angle is 30°. It differs from the existing light guide structure by using the light distribution slope 2-2 as the corner of the light guide. The angle between the light distribution slope 2-2 and the collimation direction of the condenser 2-1 is 30°. Combined with the formed light guide teeth 2-3 on the end face of the light guide body 2, the lighting effect at the corner is better, and there will be no problems such as dark areas or bright spots. The overall lighting is more uniform.

[0028] In addition, to improve the uniformity of illumination, a light distribution pattern is formed on the light distribution slope 2-2 in this embodiment. The light distribution pattern is a groove or a raised structure, and the geometric units of the light distribution pattern are rhomboid, trapezoidal, or sawtooth-shaped, with a size of 0.1-1mm. The light distribution pattern on the light distribution slope 2-2 can adjust the light distribution through reflection or scattering, and the arrangement density of the geometric units can be varied according to the gradient of light distribution requirements to achieve the desired illumination effect.

[0029] This embodiment utilizes a light guide structure combining a concentrator 2-1 and a light distribution bevel 2-2 to balance both focusing and diffusion requirements. The light guide head is less prone to localized bright spots or dark areas, resulting in excellent light distribution uniformity. The overall L-shaped design allows the light guide to achieve an L-shaped bend, saving lateral space and ensuring that the light-emitting area at the corner is unaffected by the light guide length. This also simplifies the light guide's size and saves internal space, making installation more convenient. It is suitable for various types of light sources, including LEDs, lamp holders, and laser light sources, and can be used with a wider range of lighting fixtures.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vehicle light guide structure, characterized in that: It includes a PCB board (1), a light guide body (2) and a bracket (3). At least one LED light source (1-1) is provided on the PCB board (1), and the light guide body (2) is mounted on the bracket (3). The light guide body (2) has a light-inlet end with a light-concentrating element (2-1) facing the LED light source (1-1). The light guide body (2) has a light-distributing inclined surface (2-2) at one end away from the light-concentrating element (2-1) and in the collimation direction. The tail end of the light guide body (2) extends in the reflection direction of the light-distributing inclined surface (2-2). Light guide teeth (2-3) are formed on the end face of the light guide body (2). The light emitted by the LED light source (1-1) can be collimated by the condenser (2-1) and transmitted into the light guide body (2). After total internal reflection by the light distribution inclined surface (2-2), it is transmitted to the light guide tooth (2-3) at the end to illuminate the whole.

2. The vehicle light guide structure according to claim 1, characterized in that: The optical guide body (2) has an L-shaped structure.

3. The vehicle light guide structure according to claim 1, characterized in that: The concentrator (2-1) is a composite curved surface or parabolic surface structure.

4. The vehicle light guide structure according to claim 1, characterized in that: The angle between the light distribution slope (2-2) and the collimation direction of the condenser (2-1) is 30°-60°.

5. The vehicle light guide structure according to claim 1, characterized in that: The light distribution slope (2-2) is provided with a light distribution pattern.

6. The vehicle light guiding structure according to claim 5, characterized in that: The light distribution pattern is a groove or a raised structure.

7. A vehicle light guide structure according to claim 6, characterized in that: The geometric units of the light distribution pattern are rhombuses, trapezoids, or sawtooth shapes.

8. A vehicle light guide structure according to claim 7, characterized in that: The size of the light distribution pattern geometric unit is 0.1-1mm.

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