Light guide structure and vehicle lamp

Abstract

The utility model provides a light guide structure and an automobile lamp, and relates to the technical field of automobile lighting. The light guide structure comprises a first light guide section and a second light guide section which are connected with each other, the first light guide section comprises a first body and a dodging part, and the second light guide section comprises a second body and a reflecting part; the dodging part and the reflecting part are arranged in the first direction, and the first direction is parallel to the arrangement direction of the first light guide section and the second light guide section. According to the light guide structure, the head lighting defect of the light guide structure can be overcome, and the lighting uniformity of the light guide structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lighting, in particular to a light guide structure and an automobile lamp. Background Art

[0002] With the continuous development of automobile lighting technology and the ever-changing appearance of automobile lighting, more and more consumers and vehicle customers have put forward unprecedented higher requirements for automobile lighting, especially the lighting effect of automobile lighting is becoming more and more stringent, requiring the overall lighting uniformity to be more beautiful and consistent. Compared with traditional reflector-type automobile lights, light guides have become the first choice for automobile lighting design due to their advantages such as small space occupation, low cost, long light guide distance and ability to improve the uniformity of light distribution.

[0003] Although the light guide structure of the existing optical system can meet the basic requirements of optical light efficiency and uniformity, as the shape of car lights becomes more and more complex and varied, the OEMs have higher and higher requirements for the uniformity of optical lighting, and the current light guide structure can no longer meet the higher requirements. In particular, due to the transmission form of light in the light guide, the number of light collisions at the head (i.e., the light input end) of the light guide structure is small, and the light collision angle is single, which leads to poor uniformity of the light guide structure at its head, which is not conducive to uniform lighting of the light guide. Therefore, how to provide a new light guide structure to improve the lighting uniformity of the light guide structure is important and meaningful. Utility Model Content

[0004] The utility model aims to provide a light guide structure and a vehicle lamp, which can improve the head lighting defects of the light guide structure and improve the lighting uniformity of the light guide structure.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In one aspect of the utility model, a light guide structure is provided, the light guide structure comprising a first light guide segment and a second light guide segment connected to each other, the first light guide segment comprising a first body and a light homogenizing portion, the second light guide segment comprising a second body and a reflecting portion; the light homogenizing portion and the reflecting portion are arranged along a first direction, the first direction is parallel to the arrangement direction of the first light guide segment and the second light guide segment. The light guide structure can improve the head lighting defect of the light guide structure and improve the lighting uniformity of the light guide structure.

[0007] Optionally, the first light guide segment is arranged at an end of the light guide structure close to the light source.

[0008] Optionally, the light homogenizing portion and the light emitting surface of the first light guide segment are arranged opposite to each other, and the reflecting portion and the light emitting surface of the second light guide segment are arranged opposite to each other.

[0009] Optionally, the light homogenizing portion and the reflecting portion are connected to each other in the first direction.

[0010] Optionally, a size of the light homogenizing portion along a first direction is greater than or equal to four times the diameter of the first light guide segment, and the first direction is parallel to an arrangement direction of the first light guide segment and the second light guide segment.

[0011] Optionally, the light homogenizing portion is any one of a white paint layer, a reflection layer and a scattering layer arranged on the first light guide segment.

[0012] Optionally, the light homogenizing portion is a pattern structure arranged on the first light guide segment.

[0013] Optionally, a surface of the pattern structure away from the light-emitting surface of the first light-guiding segment is a curved surface.

[0014] Optionally, the reflecting part is a light guiding tooth.

[0015] Another aspect of the present invention provides a vehicle lamp, which comprises the above-mentioned light guide structure.

[0016] The beneficial effects of the utility model include:

[0017] The light guide structure provided by the present application includes a first light guide segment and a second light guide segment connected to each other, the first light guide segment includes a first body and a light homogenizing portion, and the second light guide segment includes a second body and a reflecting portion; the light homogenizing portion and the reflecting portion are arranged along a first direction, and the first direction is parallel to the arrangement direction of the first light guide segment and the second light guide segment. The present application sets a light homogenizing portion on the first light guide segment, so that when the light passes through the first light guide segment into the light guide structure, the light irradiated on the light homogenizing portion of the first light guide segment can be homogenized and reflected, so that this part of the light can be homogenized and then emitted from the light emitting surface of the first light guide segment. The present application can improve the uniformity of the light emitting light of the first light guide segment through the above-mentioned setting, thereby improving the head lighting defect of the light guide structure and improving the lighting uniformity of the light guide structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of the light guide structure provided in the embodiment of the utility model;

[0020] Figure 2 The second structural schematic diagram of the light guide structure provided by the embodiment of the utility model;

[0021] Figure 3 for Figure 2A partial enlarged view of point A in the middle.

[0022] Icon: 10 - first optical waveguide segment; 11 - first main body; 12 - light homogenizing portion; 20 - second optical waveguide segment; 21 - second main body; 22 - reflecting portion; a - first direction; 30 - light source. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figure 1 and Figure 2 The present embodiment provides a light guide structure, which includes a first light guide segment 10 and a second light guide segment 20 connected to each other, wherein the first light guide segment 10 includes a first body 11 and a light homogenizing portion 12, and the second light guide segment 20 includes a second body 21 and a reflecting portion 22. The light homogenizing portion 12 and the reflecting portion 22 are arranged along a first direction a, and the first direction a is parallel to the arrangement direction of the first light guide segment 10 and the second light guide segment 20.

[0030] Among them, the first body 11 and the second body 21 can be used for total reflection of light, respectively, the light homogenizing part 12 is used to reflect and homogenize the light, and the reflecting part 22 is used to reflect the light; the light enters the light guide structure through the first light guide segment 10. The first light incident on the first light guide segment 10 is transmitted through the first body 11 and the second body 21 in turn through total reflection. The second light incident on the first light guide segment 10 is homogenized by the light homogenizing part 12 and then emitted from the light emitting surface of the first light guide segment 10. The third light incident on the first light guide segment 10 is reflected by the light homogenizing part 12, and then emitted from the light emitting surface of the second light guide segment 20 through total reflection of the second body 21 and / or reflection of the reflecting part 22 of the second body 21. The fourth light incident on the first light guide segment 10 is emitted from the light emitting surface of the second light guide segment 20 after total reflection of the first body 11 and reflection of the reflecting part 22. The light guide structure can improve the head lighting defects of the light guide structure and improve the lighting uniformity of the light guide structure.

[0031] The light guide structure provided in the present application includes a first light guide segment 10 and a second light guide segment 20. Figure 1 and Figure 2 As shown, the first optical fiber segment 10 and the second optical fiber segment 20 are connected to each other, that is, the first optical fiber segment 10 and the second optical fiber segment 20 are continuously arranged.

[0032] The first optical waveguide segment 10 includes a first body 11 and a light homogenizing portion 12, wherein the first body 11 is used for guiding light (furthermore, the first body 11 can also fully reflect light), and the light homogenizing portion 12 is used for homogenizing and reflecting light. Exemplarily, the light homogenizing portion 12 can homogenize light by diffuse reflection or by diffusion, and the present application does not limit the specific way in which the light homogenizing portion 12 homogenizes light. In addition, the present application does not limit the specific structure of the light homogenizing portion 12 for achieving light homogenization and reflection, and those skilled in the art can choose a suitable method according to actual needs, as long as the function of homogenizing and reflecting light can be achieved.

[0033] For example, in a feasible implementation, the light homogenizing portion 12 can be implemented by plating a corresponding optical layer. For example, optionally, the light homogenizing portion 12 is any one of a white paint layer, a reflective layer, and a scattering layer disposed on the first light guide segment 10. Wherein, when the light homogenizing portion 12 is a reflective layer, for example, the reflective layer can be an aluminum-plated reflective layer. In this embodiment, the light homogenizing portion 12 does not need to be provided with light guide teeth, thereby reducing the manufacturing process of the light guide teeth.

[0034] Of course, when the light homogenizing portion 12 is a reflective layer, the reflective layer may further include a plurality of sub-reflective portions 22, each of which may be used to reflect light, and different sub-reflective portions 22 may have different reflection angles for light. In this way, the light homogenizing effect may be achieved by adjusting the reflection angles of each sub-reflective portion 22.

[0035] Furthermore, when the light homogenizing portion 12 realizes light homogenization by diffuse reflection, in addition to the above-mentioned white paint layer, other methods such as enamel, plastic or fabric can also be used to realize diffuse reflection. Technical personnel in this field can choose appropriate materials according to actual needs. The white paint layer of this application is only one example.

[0036] In another feasible implementation, the light homogenizing portion 12 can also be implemented by providing a corresponding optical structure. For example, optionally, the light homogenizing portion 12 is a pattern structure provided on the first light guide segment 10, such as Figure 2 and Figure 3 shown.

[0037] That is to say, the light homogenizing portion 12 of the present application can also achieve the functions of light homogenization and light reflection through the pattern structure.

[0038] When the light homogenizing portion 12 is a pattern structure, optionally, a side of the pattern structure away from the light emitting surface of the first light guide segment 10 is a curved surface. In this way, the curved surface can diffuse the light and also homogenize the light.

[0039] The second light guide segment 20 includes a second body 21 and a reflective portion 22, wherein the second body 21 is used for guiding light (furthermore, the second body 21 can also fully reflect light), and the reflective portion 22 is used for reflecting light. It should be noted that the present application does not limit the specific structural form and material type of the reflective portion 22, and those skilled in the art can select a suitable method according to actual needs, as long as the function of reflecting light can be achieved.

[0040] Exemplarily, the reflective portion 22 may be a light guide tooth. Thus, the tooth-shaped structure of the light guide tooth can reflect the light, so that the total reflection of the light incident on the light guide tooth is destroyed, and thus, the part of the light can be directly emitted from the light emitting surface of the second light guide segment 20 after being reflected by the light guide tooth.

[0041] Optionally, the tooth structure of the above-mentioned light guide tooth can be a plane structure without diffusion function, or can be set to a curved surface structure with diffusion function (similar to the light homogenizing portion 12 using a pattern structure, and the side of the pattern structure away from the light emitting surface of the first light guide segment 10 is a curved surface). It should be noted that when a plane structure without diffusion function is adopted, the preparation process is more convenient and the cost is lower, and the basic uniform lighting function can also be met; when a curved surface structure with diffusion function is adopted, the uniformity of the light guide structure is better, which is more conducive to application scenarios with higher requirements.

[0042] Furthermore, the first body 11 is the first light guide segment 10 except the light homogenizing portion 12 , and the second body 21 is the second light guide segment 20 except the reflecting portion 22 . Both the first body 11 and the second body 21 can be used to fully reflect light.

[0043] In addition, the first light guide segment 10 can be located between the light source 30 and the second light guide segment 20, that is, in this embodiment, the first light guide segment 10 is the head of the light guide structure, and the second light guide segment 20 is the tail of the light guide structure. Since the number of light rays that collide at the light guide light source is small and the light rays collide at a single angle, it is easy to cause the light guide structure to have poor uniformity at its head, which is not conducive to uniform lighting of the light guide. Therefore, the first light guide segment 10 is preferably arranged at the end of the light guide structure close to the light source 30.

[0044] In some specific embodiments, light enters the light guide structure through the first light guide segment 10, wherein the light irradiated on the first body 11 enters the second light guide segment 20 after total reflection of the first body 11, and is transmitted through the second body 21 of the second light guide segment 20 through total reflection; the light irradiated on the first body 11 enters the second light guide segment 20 after total reflection of the first body 11, and after passing through the reflecting portion 22 of the second light guide segment 20, the total reflection in the second light guide segment 20 is destroyed, and this part of the light is directly emitted from the light emitting surface of the second light guide segment 20 under the reflection action of the reflecting portion 22; the light irradiated on the first body 11 is irradiated on the light homogenizing portion 12 after total reflection of the first body 11, and the total reflection in the first light guide segment 10 is destroyed, and this part of the light is directly emitted from the light emitting surface of the first light guide segment 10 and / or the second light guide segment 20 under the homogenizing and reflection action of the homogenizing portion 12.

[0045] In summary, the light guide structure provided by the present application includes a first light guide segment 10 and a second light guide segment 20 connected to each other, the first light guide segment 10 includes a first body 11 and a light homogenizing portion 12, and the second light guide segment 20 includes a second body 21 and a reflecting portion 22; the light homogenizing portion 12 and the reflecting portion 22 are arranged along a first direction a, and the first direction a is parallel to the arrangement direction of the first light guide segment 10 and the second light guide segment 20. The present application sets the light homogenizing portion 12 on the first light guide segment 10, so that when the light passes through the first light guide segment 10 into the light guide structure, the light irradiated on the light homogenizing portion 12 of the first light guide segment 10 can be homogenized and reflected, so that the part of the light can be homogenized and emitted from the light emitting surface of the first light guide segment 10. The present application can improve the uniformity of the light emitted by the first light guide segment 10 through the above-mentioned setting, thereby improving the head lighting defect of the light guide structure and improving the lighting uniformity of the light guide structure.

[0046] Furthermore, in the present embodiment, in order to facilitate the light reflected by the light homogenizing portion 12 to be emitted from the light emitting surface of the first light guide segment 10, the light reflected by the reflecting portion 22 to be emitted from the light emitting surface of the second light guide segment 20, optionally, the light homogenizing portion 12 and the light emitting surface of the first light guide segment 10 are arranged relative to each other, and the reflecting portion 22 and the light emitting surface of the second light guide segment 20 are arranged relative to each other.

[0047] That is, the light homogenizing portion 12 and the light emitting surface of the first light guide segment 10 are located on opposite sides of the central axis of the first light guide segment 10 , and the reflecting portion 22 and the light emitting surface of the second light guide segment 20 are located on opposite sides of the central axis of the second light guide segment 20 .

[0048] Optionally, the light homogenizing portion 12 and the reflecting portion 22 are connected to each other in the first direction a. That is, the light homogenizing portion 12 and the reflecting portion 22 are continuous without a gap therebetween, thus improving the lighting uniformity at the junction of the first light guide segment 10 and the second light guide segment 20 .

[0049] In addition, in this embodiment, the size of the light homogenizing portion 12 along the first direction a can be the same as the size of the first light guide segment 10 along the first direction a, and the size of the reflecting portion 22 along the first direction a can be the same as the size of the second light guide segment 20 along the first direction a, wherein the first direction a is parallel to the arrangement direction of the first light guide segment 10 and the second light guide segment 20, such as Figure 1 and Figure 2 shown.

[0050] Since the head of the light-guiding structure in the prior art is usually unable to evenly illuminate the light within the first dimension in the first direction a (the first dimension is approximately equal to four times the diameter of the light-guiding structure), in order to solve the above problem, in this embodiment, optionally, the dimension of the light-homogenizing portion 12 along the first direction a is greater than or equal to four times the diameter of the first light-guiding segment 10, and the first direction a is parallel to the arrangement direction of the first light-guiding segment 10 and the second light-guiding segment 20.

[0051] Another aspect of the present invention provides a vehicle lamp, which includes the above-mentioned light guide structure. Since the specific structure and technical effects of the light guide structure have been described and explained in detail above, this application will not repeat them here.

[0052] It should be noted that the vehicle lamp of the present application may also include a light source 30, and the light source 30 is located at one end of the first light guide segment 10 away from the second light guide segment 20, so that the light emitted by the light source 30 can enter the light guide structure through the first light guide segment 10. The vehicle lamp of the present application is provided with the light guide structure, so that when the light passes through the first light guide segment 10 into the light guide structure, the light irradiated on the light homogenizing portion 12 of the first light guide segment 10 can be homogenized and reflected, so that this part of the light can be homogenized and emitted from the light emitting surface of the first light guide segment 10, which can improve the uniformity of the light emitted by the first light guide segment 10, thereby improving the head lighting defect of the light guide structure, improving the lighting uniformity of the light guide structure, and further improving the lighting uniformity of the vehicle lamp.

[0053] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A light guide structure, characterized in that: It includes a first light guide segment and a second light guide segment connected to each other, the first light guide segment includes a first body and a light homogenizing portion, the second light guide segment includes a second body and a reflecting portion, the light homogenizing portion and the reflecting portion are arranged along a first direction, and the first direction is parallel to the arrangement direction of the first light guide segment and the second light guide segment.

2. The light guide structure according to claim 1, characterized in that: The first light guide segment is arranged at an end of the light guide structure close to the light source.

3. The light guide structure according to claim 2, characterized in that: The light homogenizing portion and the light emitting surface of the first light guide segment are arranged opposite to each other, and the reflecting portion and the light emitting surface of the second light guide segment are arranged opposite to each other.

4. The light guide structure according to claim 2, characterized in that: The light homogenizing unit and the reflecting unit are connected to each other in the first direction.

5. The light guide structure according to claim 1, characterized in that: A size of the light homogenizing portion along a first direction is greater than or equal to four times a diameter of the first light guide segment, and the first direction is parallel to an arrangement direction of the first light guide segment and the second light guide segment.

6. The light guide structure according to any one of claims 1 to 5, characterized in that: The light homogenizing portion is any one of a white paint layer, a reflection layer and a scattering layer arranged on the first light guide segment.

7. The light guide structure according to any one of claims 1 to 5, characterized in that: The light homogenizing portion is a pattern structure arranged on the first light guide segment.

8. The light guide structure according to claim 7, characterized in that: A surface of the pattern structure away from the light-emitting surface of the first light-guiding segment is a curved surface.

9. The light guide structure according to claim 1, characterized in that: The reflecting part is a light guide tooth.

10. A vehicle lamp, characterized in that: The light guide structure comprises the light guide structure as claimed in any one of claims 1 to 9.

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