Light guide structure and vehicle lamp
By setting a light blocking structure with a reflection area at the light inlet end of the light guide structure, the problem of uneven lighting caused by stray light in the light guide structure is solved, and higher optical uniformity is achieved.
Patent Information
- Application Number
- CN202421373632.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing light guide structure has stray light problems in the car light, resulting in uneven lighting and cannot meet the higher optical uniformity requirements.
A light blocking structure is provided at the light inlet end of the light guide structure. The light blocking structure has a reflection area for reflecting light that has not been incident through the light inlet end and preventing stray light from entering.
The light that has not been incident through the light blocking structure is effectively reflected through the reflection area of the light blocking structure, which improves the lighting uniformity of the light guide structure and avoids the problem of stray light.
Smart Images
Figure CN222503596U_ABST
Abstract
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 existing optical system's light guide structure 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 higher requirements. In particular, the head of the light guide structure (i.e., the light input end) is prone to uneven lighting due to the presence of stray light, which needs to be solved urgently. 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 stray light problem existing at the light input end of the light guide structure, thereby improving 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, which includes a light blocking structure and a light guide body; the light blocking structure is arranged at the light input end of the light guide body, and the light blocking structure has a reflection area, and the reflection area is used to reflect light; the light enters the light guide structure from the light input end, wherein the light entering the light guide body from the light input end is emitted from its light output side, and part of the light that is not incident from the light input end into the light guide body can be reflected by the reflection area of the light blocking structure. The light guide structure can improve the stray light problem existing at the light input end of the light guide structure, thereby improving the lighting uniformity of the light guide structure.
[0007] Optionally, the light blocking structure and the light emitting surface of the light guide body are located on the same side of the central axis of the light guide body.
[0008] Optionally, the angle between the light blocking structure and the light incident surface of the light guide body is between a first angle and 180°; the first angle is the angle between the light incident to the edge of the light incident surface of the light guide body and the light incident surface of the light guide body.
[0009] Optionally, the light blocking structure includes a first surface and a second surface that are arranged opposite to each other, and the reflective area is located on the first surface and / or the second surface.
[0010] Optionally, the first surface and / or the second surface is a curved surface.
[0011] Optionally, the reflective area is provided with patterns or leather textures.
[0012] Optionally, the reflective area is coated with white paint.
[0013] Optionally, the area of the reflection region is greater than or equal to a first area, and the first area is an area on the light shielding structure irradiated by part of the light that is not incident from the light incident end into the light guide body.
[0014] Optionally, the light guide body has a light guide tooth, which is arranged opposite to the light emitting side of the light guide body, and is used to reflect the light in the light guide body so as to emit it from the light emitting side of the light guide body.
[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 light blocking structure and a light guide body; the light blocking structure is arranged at the light input end of the light guide body, and the light blocking structure has a reflection area, and the reflection area is used to reflect light; the light enters the light guide structure from the light input end, wherein the light incident from the light input end into the light guide body exits from its light output side, and part of the light that does not enter the light guide body from the light input end can be reflected by the reflection area of the light blocking structure. The present application arranges a light blocking structure with a reflection area at the light input end of the light guide body, so that the reflection area can reflect the light that does not enter the light guide body through the light input end, thereby avoiding stray light from being incident on the light output side of the light guide body, thus improving the stray light problem existing at the light input end of the light guide structure in the prior art, thereby 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 2The second structural schematic diagram of the light guide structure provided by the embodiment of the utility model;
[0021] Figure 3 The third structural schematic diagram of the light guide structure provided by the embodiment of the utility model;
[0022] Figure 4 This is a fourth structural schematic diagram of the light guide structure provided in an embodiment of the utility model.
[0023] Icon: 10 - light blocking structure; 11 - first surface; 12 - second surface; 121 - reflection area; 20 - light guide body; 21 - light incident surface; 22 - light exiting surface; 23 - light guide tooth; 30 - light source; α - first angle; β - second angle. DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] Please refer to Figures 1 to 3 As shown, this embodiment provides a light guide structure, which includes a light blocking structure 10 and a light guide body 20; the light blocking structure 10 is arranged at the light incident end of the light guide body 20, and the light blocking structure 10 has a reflection area 121, and the reflection area 121 is used to reflect light; the light is incident from the light incident end of the light guide body 20 into the light guide structure, wherein the light incident from the light incident end of the light guide body 20 into the light guide body 20 is emitted from its light exit side, and part of the light that is not incident from the light incident end into the light guide body 20 can be reflected by the reflection area 121 of the light blocking structure 10. The light guide structure can improve the stray light problem existing at the light incident end of the light guide structure, thereby improving the lighting uniformity of the light guide structure.
[0031] The light guide structure provided in the present application includes a light blocking structure 10 and a light guide body 20. In some specific embodiments, the light incident into the light guide body 20 can be totally reflected and propagated in the light guide body 20. During the propagation process, part of the light can be incident into the light emitting surface 22 of the light guide body 20, so that the light is emitted through the light emitting surface 22 to illuminate the light guide body 20. In this way, the light emitted through the light emitting surface 22 of the light guide body 20 can be seen by vehicles traveling around.
[0032] In order to allow part of the light to be emitted from the light emitting surface 22 of the light guide body 20 when the light is transmitted in the light guide body 20, optionally, as Figure 1 and Figure 3 As shown, the light guide body 20 has a light guide tooth 23 , which is arranged opposite to the light emitting side of the light guide body 20 . The light guide tooth 23 is used to reflect the light in the light guide body 20 so that it is emitted from the light emitting side of the light guide body 20 .
[0033] That is, the light incident on the light guide teeth 23 will be reflected by the light guide teeth 23 and emitted from the light emitting surface 22 of the light guide body 20 ; and the remaining light can continue to be transmitted by total reflection in the light guide teeth 23 .
[0034] The above-mentioned light guide teeth 23 include a plurality of light guide teeth 23, and the plurality of light guide teeth 23 are spaced and evenly arranged on the light guide body 20. The specific number and arrangement position of the light guide teeth 23 can be set by those skilled in the art as needed, and this application does not impose any specific restrictions. Of course, using the light guide teeth 23 to make the light reflected so as to be emitted from the light exit surface 22 of the light guide body 20 is only an example. In other embodiments, other methods can also be used to destroy the total reflection of the light in the light guide body 20, as long as the light can be reflected so as to be emitted from the light exit surface 22 of the light guide body 20.
[0035] It should be noted that the light guide body 20 has a light incident surface 21 and a light emitting surface 22 , and the light guide teeth 23 are disposed on a side of the light guide body 20 opposite to the light emitting surface 22 .
[0036] The light blocking structure 10 is disposed at the light incident end of the light guide body 20. Figure 2 and Figure 3 As shown, the light incident end of the light guide body 20 is an end of the light guide body 20 provided with a light incident surface 21. In this embodiment, the light blocking structure 10 has a reflective region 121, and the reflective region 121 is used to reflect light.
[0037] In the present embodiment, when light is incident into the light guide structure, a part of the light will be directly incident into the light guide body 20 through the light incident surface 21 of the light guide structure. This part of the light can be emitted from the light emitting surface 22 of the light guide body 20 through the light guide body 20, thereby realizing the lighting of the light guide body 20; because there is a gap between the light source 30 and the light incident end, there is still a part of the light that will not enter the light guide body 20 from the light incident end. At this time, the present application sets a light blocking structure 10, so that part of the light that is not incident into the light guide body 20 through the light incident end can be reflected by the reflection area 121 of the light blocking structure 10, so that the part of the light can be reflected back, thereby preventing the part of the light from directly emitting from the gap between the light source 30 and the light guiding end. In this way, the generation of stray light near the light incident end of the light guide structure can be avoided, thereby improving the lighting uniformity of the light guide structure.
[0038] In summary, the light guide structure provided by the present application includes a light blocking structure 10 and a light guide body 20; the light blocking structure 10 is arranged at the light incident end of the light guide body 20, and the light blocking structure 10 has a reflective area 121, and the reflective area 121 is used to reflect light; light is incident into the light guide structure, wherein the light incident into the light guide body 20 passes through the light guide body 20 and is emitted from its light emitting side, and part of the light that is not incident into the light guide body 20 from the light incident end can be reflected by the reflective area 121 of the light blocking structure 10. The present application arranges the light blocking structure 10 having the reflective area 121 at the light incident end of the light guide body 20, so that the reflective area 121 can reflect part of the light that is not incident into the light guide body 20 from the light incident end, thereby preventing the part of the light from being directly emitted from the gap between the light source 30 and the light inlet end of the light guide, and thus, the stray light problem existing at the light incident end of the light guide structure in the prior art can be improved, thereby improving the lighting uniformity of the light guide structure. In addition, since the light blocking structure 10 of the present application blocks the emission of stray light by reflection, it can also avoid the dark area near the light incident end of the light guide body 20, and the lighting effect is better.
[0039] To achieve a better blocking effect of the light blocking structure 10, the light blocking structure 10 and the light exit surface 22 of the light guide body 20 are optionally located on the same side of the central axis of the light guide body 20. In this way, the light blocking structure 10 can effectively block the light directly incident on the light exit side of the light guide body 20.
[0040] For further information, please refer to Figure 4 As shown, optionally, the angle between the light blocking structure 10 and the light incident surface 21 of the light guide body 20 is between a first angle α and 180°; the first angle α is the angle between the light incident to the edge of the light incident surface 21 of the light guide body 20 and the light incident surface 21 of the light guide body 20.
[0041] It should be noted that the first angle α can refer to Figure 4 As shown, when the light blocking structure 10 and the light incident surface 21 of the light guide body 20 are at a first angle α, the light incident on the edge of the light incident surface 21 of the light guide body 20 is just blocked by the light blocking structure 10, and the setting of the light blocking structure 10 will not affect the normal light emitted by the light source 30.
[0042] Of course, the angle between the light blocking structure 10 and the light incident surface 21 of the light guide body 20 can be between the first angle α and the second angle β, wherein the second angle β is 180°, that is, the maximum angle between the light blocking structure 10 and the light incident surface 21 of the light guide body 20 is 180°. Figure 4 As shown, in this way, the light blocking structure 10 can block the light directly incident on the light emitting side of the light guide body 20 , and can also prevent the setting of the light blocking structure 10 from affecting the normal light emitting of the light guide body 20 .
[0043] Those skilled in the art can freely choose between the first angle α and the second angle β according to actual application requirements, and this application does not impose any specific limitation on this.
[0044] Please refer to Figure 3 Optionally, the light-blocking structure 10 includes a first surface 11 and a second surface 12 that are arranged opposite to each other, and the reflective area 121 is located on the first surface 11 and / or the second surface 12. The first surface 11 and / or the second surface 12 are curved surfaces. In some specific embodiments, the reflective area 121 is located on the second surface 12; part of the light that is not incident from the light-incident end into the light-guiding body 20 is incident into the light-blocking structure 10 through the first surface 11, and is reflected by the reflective area 121 of the second surface 12 and then emitted from the first surface 11.
[0045] In this way, part of the light that has not been incident into the light guide body 20 from the light incident end can be incident into the light blocking structure 10 through the first surface 11, and then will be reflected by the reflective area 121 on the second surface 12 of the light blocking structure 10, so that the part of the light is reflected back, thus preventing stray light from being directly emitted from the gap between the light source 30 and the light guide end.
[0046] In order to enable the light-blocking structure 10 to have a blocking effect and reduce the overall volume of the light-blocking structure 10, the second surface 12 may be a curved surface, such as Figure 3 Compared with the second surface 12 set in a plane, the second surface 12 set in an arc surface can reflect more light and reduce the volume of the light-blocking structure 10, so that the light-guiding structure can be miniaturized. Of course, in other embodiments, the second surface 12 set in a plane can also be used according to actual application needs.
[0047] It should be noted that there are many ways to implement the light action in the reflective area 121 of the present application, and those skilled in the art can select any feasible way as needed.
[0048] For example, in a feasible implementation, optionally, a pattern or leather grain is provided on the reflection area 121. That is to say, the present application may use a pattern or leather grain structure to reflect light. Among them, when a pattern is provided on the reflection area 121, it may be a stripe pattern, and the reflection effect of the stripe pattern is better. Of course, the stripe pattern is only an example, and other patterns may also be used. In the embodiment using a pattern or leather grain structure, part of the light is reflected by the reflection area 121, and part of the light is emitted from the reflection area 121, and the pattern or leather grain structure of the reflection area 121 can diffuse the light emitted from the reflection area 121, avoid the light source 30 directly emitting directly from the gap between the light guide and the light source 30, and at the same time uniformize the light, and to a certain extent can widen the light emitting surface 22 of the light guide body 20. Of course, the above method is only an example, and is not a limitation of the present application. Those skilled in the art may also use other feasible methods to realize the function of the reflection area 121 that enables the light to be scattered and emitted. Furthermore, in a preferred embodiment, the striped pattern and the light guide extend in the same direction to obtain better reflection and diffusion effects.
[0049] For another example, in another feasible implementation, optionally, white paint is coated on the reflective area 121. That is, white paint can also be used to reflect light.
[0050] Of course, in other embodiments, a reflective film may also be coated on the reflective area 121 .
[0051] In order to completely block the part of the light emitted by the light source 30 that is not incident from the light incident end of the light guide body 20, optionally, the area of the reflection region 121 is greater than or equal to the first area, and the first area is the area of the part of the light that is not incident from the light incident end of the light guide body 20 that is irradiated on the light blocking structure 10.
[0052] That is to say, the area of the reflection area 121 must at least cover part of the light that is not incident from the light incident end of the light guide body 20. In this way, part of the light that is not incident from the light incident end of the light guide body 20 can be completely blocked, so that the light guide structure can effectively avoid the emission of stray light and improve the lighting uniformity of the light guide structure.
[0053] Another aspect of the present invention provides a vehicle lamp, which includes the above-mentioned light guide structure. The specific structure and technical effects of the light guide structure have been described in detail above, so this application will not repeat them here.
[0054] Of course, the above-mentioned vehicle lamp may include a light source 30 and other optical elements in addition to the light guide structure, and the present application does not limit this. The vehicle lamp provided by the present application adopts a light guide structure with a light blocking structure 10, so that the stray light problem existing at the light input end of the light guide structure in the prior art can be improved, thereby improving the lighting uniformity of the light guide structure.
[0055] 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.
[0056] 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 comprises a light blocking structure and a light guide body; the light blocking structure is arranged at the light incident end of the light guide body, the light blocking structure has a reflection area, and the reflection area is used to reflect light; The light is incident from the light incident end into the light guide structure, wherein the light incident from the light incident end into the light guide body is emitted from its light emitting side, and part of the light that is not incident from the light incident end into the light guide body can be reflected by the reflective area of the light blocking structure.
2. The light guide structure according to claim 1, characterized in that: The light blocking structure and the light emitting surface of the light guide body are located on the same side of the central axis of the light guide body.
3. The light guide structure according to claim 1, characterized in that: The angle between the light blocking structure and the light incident surface of the light guide body is between the first angle and 180°; the first angle is the angle between the light incident to the edge of the light incident surface of the light guide body and the light incident surface of the light guide body.
4. The light guide structure according to claim 1, characterized in that: The light blocking structure comprises a first surface and a second surface which are arranged opposite to each other, and the reflective area is located on the first surface and / or the second surface.
5. The light guide structure according to claim 4, characterized in that: The first surface and / or the second surface is a curved surface.
6. The light guide structure according to claim 4 or 5, characterized in that: The reflective area is provided with patterns or leather grains.
7. The light guide structure according to claim 4 or 5, characterized in that: The reflective area is coated with white paint.
8. The light guide structure according to claim 1, characterized in that: The area of the reflection region is greater than or equal to a first area, and the first area is an area on which part of the light that is not incident from the light incident end into the light guide body is irradiated on the light blocking structure.
9. The light guide structure according to claim 1, characterized in that: The light guide body has a light guide tooth, which is arranged opposite to the light emitting side of the light guide body and is used for reflecting the light in the light guide body so as to emit the light from the light emitting side of the light guide body.
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.