Optical fiber tail lamp with stereoscopic display effect

Abstract

The utility model discloses an optical fiber tail lamp with a stereoscopic display effect. The optical fiber tail lamp comprises a shell, a lampshade, a support and at least three light guide plates, wherein the shell and the lampshade are connected; the support is arranged in the shell; a light-emitting part which emits light upwards is arranged below each light guide plate, an optical fiber unit is integrally arranged at the upper end of each light guide plate, and a laser etching pattern area is formed on the back face, away from the lampshade, of each light guide plate. All the light guide plates are arranged at equal intervals and are arranged from high to low in the direction from the shell to the lampshade. According to the utility model, the laser etching pattern is used for replacing the traditional microstructure, and the optical fiber unit is used for supplementing brightness, so that the lighting uniformity under large curvature can be ensured, part of luminous flux is saved, and the stereoscopic visual effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamp production, in particular to an optical fiber tail lamp with a three-dimensional display effect. Background Art

[0002] In order to keep up with the changing trend of the public aesthetic, the shape evolution of automobiles is gradually moving towards three-dimensionalization and thinning. The light-emitting uniformity and novel shape, especially the automotive signal lamps with surface micro-structure characteristics, are preferred by some vehicle manufacturers due to their delicate and thin characteristics. As a thin optical solution, the light guide plate is mostly used for lighting large-area patterns because of its convenient installation and relatively good uniformity. The main method of the light guide plate for guiding light is to change the light path by adding micro-structures on its surface, and the diffusion effect of light is realized through the leather grain micro-structures on the side end face of the light guide plate, so as to finally make the overall light guide structure achieve a uniform lighting effect.

[0003] However, this method of adding micro-structures on the surface often has a large amount of data in design, there will be bright lines when lighting at the edge of a large curvature, the uniformity in irregular areas is poor, the injection molding process is complex, more LED luminous flux is required, and the lighting does not have a strong three-dimensional visual impact effect. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an optical fiber tail lamp with a three-dimensional display effect. It replaces the traditional micro-structure with a laser-engraved pattern and uses an optical fiber unit for brightness compensation, which can ensure the lighting uniformity under a large curvature, save part of the luminous flux, and has a three-dimensional visual effect.

[0005] In order to solve the above technical problem, the technical solution of the utility model is as follows:

[0006] An optical fiber tail lamp with a three-dimensional display effect, which includes a housing and a lamp cover connected to each other, a bracket arranged in the housing, and at least three light guide plates mounted on the bracket;

[0007] Below each of the light guide plates, there is a light-emitting component that emits light upward. At the upper end of each light guide plate, an optical fiber unit is integrally arranged. On the back of each light guide plate away from the lamp cover, a laser-engraved pattern area is formed;

[0008] All the light guide plates are arranged at equal intervals and are arranged from high to low from the housing to the lamp cover direction.

[0009] Further, the optical fiber unit is a whole side-emitting optical fiber that emits light 360 degrees.

[0010] Further, the laser-engraved pattern area is provided with leather grains for destroying total reflection.

[0011] Further, the light-emitting element is an LED light source, and the LED light source is mounted on the bracket through a PCB board.

[0012] Further, the material of the light guide plate is transparent acrylic.

[0013] Further, the light-emitting surface of the light guide plate close to the lamp shade is provided with patterns or leather grains.

[0014] Further, the depth of the laser-engraved pattern area is 0.01 - 0.03 mm, and the thickness of the light guide plate is 2.5 - 3.5 mm.

[0015] Further, the distance between the light-emitting element and the lower end of the light guide plate is 0.5 - 1 mm.

[0016] Further, each light guide plate has a patternless area below the laser-engraved pattern area.

[0017] Further, the vertical width of the patternless area is 8 - 9.5 mm.

[0018] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0019] 1. By using the laser-engraved pattern process to replace the traditional micro-structure injection molding process, the utility model can achieve technical substitution in processing and has the characteristics of high-efficiency production. At the same time, an optical fiber unit is integrally arranged at the upper end of the light guide plate, and the characteristic of 360-degree light emission of the side-emitting optical fiber is utilized to supplement the brightness of the lower laser-engraved pattern area, thereby saving some light flux.

[0020] 2. Through the design of the laser-engraved pattern area of the light guide plate in cooperation with the upper-end optical fiber unit, the utility model can make full use of the characteristic that the optical fiber optical-grade glass can be bent three times to facilitate the shape design. In the design, a single long optical fiber can be directly used to realize the closed-loop design of the pattern area in the entire bending area, saving costs and improving production efficiency. And relying on the brightness supplement effect and the bending characteristic of the optical fiber unit, the uniformity of lighting can be ensured even at a large curvature.

[0021] 3. Multiple light guide plates of the utility model are arranged in equal intervals from high to low, so that the brightness of the front light guide plate is greater than that of the rear one in turn. Different brightness differences and equal-spacing gaps exist between each light guide plate, and the height differences are different, thus forming a floating three-dimensional effect visually and bringing a good visual experience to people.

[0022] 4. When laser processing is carried out in the laser-engraved pattern area of the utility model, leather grains are generated, which can destroy the total reflection of the light in the light guide plate transmitting upward, so that the luminous laser-engraved pattern area can be observed here. It is integrally formed and there is no need to repeatedly add leather grain settings in the subsequent design, simplifying the design.

[0023] 5. The utility model reserves a patternless area below the laser-engraved pattern area, which can be used for light guiding and blocking LED bright spots. Description of the Drawings

[0024] Figure 1 It is a front schematic view of an embodiment of the utility model;

[0025] Figure 2 It is a schematic cross-sectional structure view of an embodiment of the utility model;

[0026] Figure 3 It is a schematic cross-sectional structure view of another perspective of an embodiment of the utility model;

[0027] Figure 4 It is a schematic view of the back details of the light guide plate of an embodiment of the utility model;

[0028] Figure 5 It is an optical schematic diagram of an embodiment of the utility model;

[0029] Figure 6 It is a schematic view of the details of the light incident end of the light guide plate of an embodiment of the utility model;

[0030] Figure 7 It is a specific design drawing of the patternless area of an embodiment of the utility model;

[0031] Among them, 1. housing; 2. lamp shade; 3. bracket; 4. light guide plate; 40. laser-engraved pattern area; 41. patternless area; 5. LED light source; 50. PCB board; 6. optical fiber unit. Detailed Embodiment

[0032] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments and in conjunction with the drawings.

[0033] As Figure 1-7 shown, in this embodiment, an optical fiber taillight with a three-dimensional display effect is provided, which mainly consists of components such as a housing 1, a lamp shade 2, and three light guide plates 4. The lamp shade 2 is smoky gray, and the housing 1 is ultrasonically welded to the lamp shade 2. A bracket 3 is arranged inside the housing 1, and the three light guide plates 4 are installed on the bracket 3 and are equally spaced and arranged from high to low from the housing 1 to the lamp shade 2. The three light guide plates 4 are arranged in an equally spaced and decreasing height order, so that the brightness of the front light guide plate 4 is greater than that of the rear one in turn. The different brightness differences and the equal-spacing gaps between each light guide plate 4 result in different height drops, thus forming a floating three-dimensional effect visually and bringing a good visual experience to people.

[0034] Specifically, a light-emitting component that emits light upward is provided below each light guide plate 4. In this embodiment, the light-emitting component is a plurality of LED light sources 5, and the LED light sources 5 are mounted on the bracket 3 through the PCB board 50. Of course, the light-emitting component is for providing incident light perpendicular to the light guide plate 4. Therefore, the type of light source is not limited as long as it is a light-emitting form that can emit light upward. So it doesn't necessarily have to be a light source, and it may also be a combined light emission of optical forms such as a light guide structure or a reflector bowl.

[0035] In order to supplement the brightness of the light guide plate 4 in this embodiment, a fiber optic unit 6 is integrally provided at the upper end of each light guide plate 4. At the same time, a laser engraving pattern area 40 is formed by opening on the back of each light guide plate 4 away from the lamp shade 2. The depth of the laser engraving pattern area 40 is 0.01 mm, and the thickness of the light guide plate 4 is 2.5 mm. The laser engraving pattern area 40 is processed by laser engraving. During the processing, depressions and roughness will be generated on its surface. The laser engraving pattern area 40 leaves a skin texture after processing. Due to the skin texture on the back of the light guide plate 4, the total reflection here can be damaged, changing the light path and allowing the light to pass through the lamp shade 2 and emit forward. The specific light path principle can be referred to Figure 5 As shown, the light emitted by the LED light source 5 enters the light guide plate 4 and undergoes total internal reflection. The light path can be changed by the skin texture of the laser engraving pattern area 40 and emit from the light-emitting surface, and then emit through the lamp shade 2.

[0036] Specifically, the fiber optic unit 6 in this embodiment is a side-emitting optical fiber. According to the emission length, single-sided light input is selected, and the side-emitting optical fiber emits light 360 degrees, which has a light supplement effect on the light guide plate 4. At the same time, the optical fibers on the three light guide plates 4 are bent to meet their minimum curvature and use a whole optical fiber. In this embodiment, the laser engraving pattern process is used to replace the traditional micro-structure injection molding process, which can achieve technical substitution in processing and has the characteristics of high-efficiency production. At the same time, the fiber optic unit 6 is integrally provided at the upper end of the light guide plate 4, and the characteristic of the 360-degree light emission of the side-emitting optical fiber is used to supplement the brightness of the lower laser engraving pattern area 40. Furthermore, part of the light flux of the LED light source 5 can be saved, which is beneficial to heat dissipation.

[0037] In this embodiment, through the design of the laser engraving pattern area 40 on the light guide plate 4 cooperating with the upper fiber optic unit 6, the characteristic of the fiber optic optical-grade glass that can be bent 3 times can be fully utilized to facilitate the styling design. In the design, a single long optical fiber can be directly used to realize the closed-loop design of the entire bent area pattern area, saving costs and improving production efficiency. And relying on the brightness supplement effect and the bending characteristic of the fiber optic unit 6, the lighting uniformity can be ensured even at a large curvature.

[0038] The light guide plate 4 in this embodiment can be made of transparent acrylic material, and patterns or skin textures are added to the light-emitting surface of the light guide plate 4 close to the lamp shade 2 to improve the lighting uniformity. Of course, the material of the light guide plate 4 can also be other light-guiding materials such as glass, PC, and silicone.

[0039] In addition, in order to facilitate light guiding and block the bright spots of the LEDs, in this embodiment, a patternless area 41 is left below the laser engraving pattern area 40 of each light guide plate 4. Refer to Figure 6 , 7 As shown in

[0040] , the distance h from the LED light source 5 to the lower end of the light guide plate 4 is 0.5 - 1 mm, the vertical width H of the patternless area 41 is 8 - 9.5 mm. Let the distance between every two LED light sources 5 be L. Then, the maximum light-emitting half angle of the LED light source 5 and the included angle with the y-axis is θ1. When the light enters the light guide plate 4, refraction occurs, and the included angle with the interface normal is θ2. According to the law of refraction, it satisfies:

[0041] Wherein,

[0042] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] Through the above specific embodiments, the technical problems solved, technical solutions and beneficial effects of the present utility model have been further elaborated in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fiber optic taillight with a three-dimensional display effect, characterized in that: It comprises a housing (1) and a lampshade (2) connected to each other, a bracket (3) arranged in the housing (1), and at least three light guide plates (4) mounted on the bracket (3); A light-emitting member for emitting light upward is arranged below each light guide plate (4), an optical fiber unit (6) is integrated at the upper end of each light guide plate (4), and a laser-engraved pattern area (40) is formed on the back side of each light guide plate (4) away from the lampshade (2); All the light guide plates (4) are arranged at equal intervals and are arranged from high to low in a direction from the housing (1) to the lampshade (2).

2. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The optical fiber unit (6) is a whole side-emitting optical fiber that emits light at 360 degrees.

3. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The laser engraved pattern area (40) is provided with skin grains for destroying total reflection.

4. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The light-emitting component is an LED light source (5), and the LED light source (5) is mounted on the bracket (3) via a PCB board (50).

5. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The light guide plate (4) is made of transparent acrylic.

6. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The light-emitting surface of the light guide plate (4) close to the lampshade (2) is additionally provided with patterns or leather grains.

7. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The depth of the laser engraved pattern area (40) is 0.01-0.03 mm, and the thickness of the light guide plate (4) is 2.5-3.5 mm.

8. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: The distance between the light emitting element and the lower end of the light guide plate (4) is 0.5-1 mm.

9. The optical fiber taillight with a three-dimensional display effect according to claim 1, characterized in that: Each of the light guide plates (4) has a non-patterned area (41) below the laser-engraved patterned area (40).

10. The optical fiber taillight with a three-dimensional display effect according to claim 9, characterized in that: The upper and lower widths of the non-patterned area (41) are 8-9.5 mm.

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