Light guide piece, lighting device and vehicle
By designing light guides with tangential connection and light-guiding structures in vehicle lighting devices, the problem of uneven light emission of the annular shaped lighting devices is solved, and a more uniform and efficient light transmission and luminous effect is achieved.
Patent Information
- Application Number
- CN202420817742.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-18
AI Technical Summary
Existing vehicle lighting devices, especially those with ring-shaped shapes, have poor luminous effects, resulting in uneven light and may have bright spots or dark spots.
A light guide member is designed, including an annular light guide body and a light inlet part. The exit end of the light inlet part is connected to the tangent direction of the annular light guide body, and a tangential connection and light guidance structure (such as the first and second light guidance structures) are used to improve the uniformity of light and transmission efficiency of light.
Through the design of tangential connection and light guidance structure, light can enter the annular light guide body more directly, reducing deflection and energy loss, improving the uniformity and directionality of light emission, and enhancing the optical performance of the lighting device.
Smart Images
Figure CN222651120U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and specifically provides a light guide component, a lighting device and a vehicle. Background Art
[0002] Headlights are key components of vehicles. The popularity of LED technology in automotive lighting has led to an increasingly diverse shape and light-emitting form of headlights. However, there is usually a mutual restriction between the shape of headlights and the uniformity of light emission.
[0003] In the related art, in order to improve the uniformity of the light emission of annular or closed-shaped headlights, the method of increasing the longitudinal length of the annular thick-walled part or entering the light from the two ports of the annular light guide is usually adopted. This can improve the conduction and distribution of light, thereby achieving a more uniform lighting effect. However, this will also put more demands on the installation space of the headlight. In addition, since the light input end of the LED cannot be completely hidden, this may cause the light to be unevenly distributed, and may even produce bright spots or dark spots in the light-emitting area.
[0004] Accordingly, the art requires a new vehicle lighting device to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing vehicle lighting devices, especially the ring-shaped lighting devices, have poor lighting effects.
[0006] In a first aspect, the utility model provides a light guide, comprising:
[0007] Ring-shaped light guide body;
[0008] The light inlet portion has an incident end and an output end, wherein the incident end is used to introduce light, and the output end is connected to the annular light guide body along the tangent direction of the annular light guide body so that the light enters the annular light guide body from the output end along the tangent direction.
[0009] Optionally, along the axial direction of the annular light-guiding body, the annular light-guiding body has a light-emitting direction, and the annular light-guiding body includes a light-emitting part facing the light-emitting direction and a backlight part away from the light-emitting direction, and the backlight part is provided with a first light-guiding structure along the circumference, and at least part of the light can be emitted toward the light-emitting direction after being reflected by the first light-guiding structure.
[0010] Optionally, a second light guiding structure is provided at the emission end, and at least part of the light can be emitted toward the light emission direction after being reflected by the second light guiding structure.
[0011] Optionally, the first light guiding structure and / or the second light guiding structure are grooves arranged at intervals.
[0012] In a second aspect, the utility model provides a lighting device, comprising:
[0013] Support frame;
[0014] The light guide as described in any one of the first aspects, wherein the light guide is arranged on the support frame;
[0015] A light source is arranged at the incident end.
[0016] Optionally, the support frame includes a main body and a cover plate connected to the main body, a receiving space is formed between the cover plate and the main body, the annular light guide body is arranged on the main body, and the light inlet portion is accommodated in the receiving space.
[0017] Optionally, the lighting device further includes:
[0018] An annular thick-walled member is arranged on the main body, and is provided with a light input end and a light output end along the axial direction, wherein the light input end faces the annular light-guiding body.
[0019] Optionally, the light output end is provided with a third light guiding structure.
[0020] Optionally, the light input end is provided with a fourth light guiding structure.
[0021] In a third aspect, the utility model provides a vehicle, comprising: a lighting device as described in any one of the second aspects.
[0022] In the case of adopting the above technical solution, the output end of the light inlet of the light guide of the utility model is connected to the annular light guide body along the tangent direction, so that after the light is emitted from the output end, it can directly enter the annular light guide body along the tangent direction. The design of the tangential connection allows the light to enter the annular light guide body more directly and propagate therein when passing through the connection between the light inlet and the annular light guide body, so as to avoid energy loss caused by excessive deflection of light due to imperfect or loose connection. In this way, the uniform luminous effect of the light can be improved, and the directionality and transmission efficiency of light propagation can be maintained. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:
[0024] Figure 1 It is a structural schematic diagram of the light-emitting side view of the light guide provided by an embodiment of the utility model;
[0025] Figure 2It is a structural schematic diagram of the backlight side view of the light guide provided by an embodiment of the utility model;
[0026] Figure 3 yes Figure 2 A schematic diagram of the structure enlargement at the center A;
[0027] Figure 4 is a schematic diagram of the propagation path of light in the light guide provided in this embodiment;
[0028] Figure 5 It is a schematic diagram of the exploded structure of the lighting device provided by the embodiment of the utility model;
[0029] Figure 6 It is a structural schematic diagram of the light-incoming end of the annular thick-walled member provided in an embodiment of the utility model;
[0030] Figure 7 yes Figure 6 A magnified schematic diagram of the structure at point B in the middle.
[0031] Figure 8 It is a structural schematic diagram of the light-emitting end of the annular thick-walled member provided in an embodiment of the utility model;
[0032] Fig. 9 yes Figure 8 A schematic diagram of the structure enlarged at C in the middle;
[0033] List of reference numerals:
[0034] 1-light guide, 11-light inlet, 111-incident end, 112-exit end, 113-second light guiding structure, 12-annular light guide body, 121-light exit part, 122-backlight part, 123-first light guiding structure, 13-mounting plate, 2-support frame, 21-main body, 22-cover plate, 23-light source, 230-circuit board, 3-annular thick-walled part, 31-light inlet end, 311-fourth light guiding structure, 32-light exit end, 321-third light guiding structure. DETAILED DESCRIPTION
[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.
[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, ordinal numbers such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0038] Please refer to Figures 1 to 4 The utility model provides a light guide 1, which is made of a light-conducting material. Figure 1 As shown, the light guide 1 includes an annular light guide body 12 and a light inlet portion 11 connected to the annular light guide body 12 .
[0039] The main function of the light inlet 11 is to guide the light from the light source 23 into the light guide 1. Specifically, the two ends of the light inlet 11 are the incident end 111 and the exit end 112. The light enters through the incident end 111, and after multiple total reflections inside the light inlet 11, it is emitted through the exit end 112. This process can guide the light from the external medium (such as air) into the light guide material, and enable the light to propagate effectively in the light guide 1.
[0040] The annular light guide body 12 is the core component of the light guide 1, and its function is to control and shape the propagation path of the light to form a specific light beam shape. In other words, the annular light guide body 12 can make the light emitted from the light source 23 propagate along the expected path inside it and finally form the desired light beam shape.
[0041] Furthermore, the emission end 112 of the light inlet 11 is connected to the annular light guide body 12 along the tangent direction thereof, so that after the light is emitted from the emission end 112 , it can directly enter the annular light guide body 12 along the tangent direction.
[0042] The design of the tangential connection allows the light to pass through the connection between the light inlet portion 11 and the annular light guide body 12, and can enter the annular light guide body 12 more directly and propagate therein. Such a design effectively avoids excessive deflection of light due to imperfect or loose connections, and reduces light energy loss. Thus, the uniform lighting effect of the light guide 1 is improved, and the directionality and transmission efficiency of light propagation are maintained.
[0043] In one embodiment, the light inlet 11 is a cylindrical component. The cylindrical light inlet 11 is conducive to forming a tangential connection with the annular light guide body 12. In addition, the cylindrical light inlet 11 is also helpful to reduce the scattering and refraction of light, thereby reducing the energy loss of light.
[0044] Furthermore, in the axial direction of the annular light guide body 12, the annular light guide body 12 is divided into a light-emitting portion 121 and a backlight portion 122. The light-emitting portion 121 faces the light-emitting direction, while the backlight portion 122 faces away from the light-emitting direction. The light-emitting direction refers to the direction of the light emitted along the axial direction, which can be referred to Figure 5 Direction of arrow shown in .
[0045] Figure 1 The figure is viewed from the side of the light emitting portion 121 , and the direction of the arrow is the propagation direction of the light in the light guide 1 . Figure 2 The figure is viewed from the side of the backlight part 122 , and the direction of the arrow is the propagation direction of the light in the light guide 1 .
[0046] Specifically, after the light enters the light inlet 11 from the incident end 111, it undergoes multiple total reflections in the light inlet 11 and then enters the annular light guide body 12 along the tangential direction, and undergoes multiple total reflections along the circumferential direction in the annular light guide body 12 to form an annular light beam.
[0047] Through this design, light can effectively enter and propagate inside the annular light guide body 12, thereby achieving uniform light emission of the headlight. This design can achieve better optical performance in a smaller space, which helps to improve the uniformity of light emission and space utilization efficiency of closed-loop or annular headlights.
[0048] In one embodiment, the backlight portion 122 is provided with a first light guiding structure 123 along the circumference, and at least part of the light can be emitted toward the light emitting direction after being reflected by the first light guiding structure 123 .
[0049] Specifically, if Figure 3 and 4As shown, the first light guiding structure 123 adopts a step-like patterned tooth structure. The "patterned tooth structure" can also be understood as a groove structure set on the surface of the backlight part 122. The groove structure can be arranged at intervals or continuously to form a step-like structure, wherein the specific form of the groove structure is related to the specific form of the light guide 1 and the path change of the light, which can be simulated and analyzed according to relevant software.
[0050] The tooth-shaped light guiding structure can make the light totally reflected in the circumferential direction, and part of the light can be projected onto the inclined surface of the step structure, and then projected along the axial direction after total reflection, thus forming an output light beam. Such a structure helps to control the propagation direction and output angle of light.
[0051] Specifically, when the light enters the annular light guide body 12, Figure 4 As shown by the dotted arrow, part of the light will hit the plane of the patterned tooth structure. After total reflection occurs in the annular light guide body 12, this part of the light will return to the inside of the annular light guide body 12 again and propagate along the circumferential direction inside the annular light guide body 12 without propagating outward.
[0052] like Figure 4 As shown by the solid arrow, a part of the light is incident on the inclined surface of the patterned tooth structure, and after being totally reflected on the inclined surface, the part of the light is then emitted along the axial direction of the annular light guide body 12 to form an outgoing light beam.
[0053] In one embodiment, the emission end 112 is provided with a second light guiding structure 113 , and at least part of the light can be emitted in the light emission direction after being reflected by the second light guiding structure 113 .
[0054] Specifically, since the light inlet 11 and the annular light guide body 12 are two components, there may be uneven distribution of light-guiding materials, rough surfaces, or imperfect geometric shapes at the connection and intersection between them, which may cause the light to be scattered, refracted or partially absorbed during the reflection process, thereby causing energy loss and affecting the transmission of light and the uniformity of luminescence.
[0055] In order to compensate for the loss of imperfect connection, the light guide 1 provided in the embodiment of the utility model is further provided with a second light guiding structure 113 at the connection between the light inlet portion 11 and the annular light guiding body 12, and the second light guiding structure 113 is a tooth-shaped structure arranged at intervals. The "tooth-shaped structure" can also be understood as a groove structure arranged at intervals on the surface of the backlight portion 122 at the connection.
[0056] Specifically, the tooth-shaped structure can change the reflection angle of the light multiple times, causing the light to be reflected multiple times at this point, increasing the number of times the light interacts with the surface of the backlight part 122 at the connection, allowing more light to be emitted in the light-emitting direction, enhancing the reflection effect, and making the light beam present a more uniform distribution on the light-emitting part or the light-emitting surface.
[0057] The utility model also provides a lighting device, such as Figure 5 As shown, the light guide 1 as described above is included. The lighting device also includes a light source 23, and the light emitted by the light source 23 enters the light guide 1 through the light inlet 11 of the light guide 1, so that the light guide 1 becomes the light-emitting body of the lighting device. The light guide 1 is installed on the support frame 2 of the lighting device.
[0058] Specifically, if Figure 5 As shown, the incident end 111 is provided with a mounting plate 13 and a circuit board 230, and the light guide 1 is mounted on the support frame 2 of the lighting device through the mounting plate 13. A light source 23 is provided on the circuit board 230, and the light source 23 can be a light emitting diode (LED), a fluorescent tube or other types of light sources. Its function is to input light into the light guide 1, and the light is evenly transmitted and emitted after passing through the light guide 1, so as to realize the lighting function.
[0059] Furthermore, the light source 23 is directly opposite to the center of the incident end 111 of the light input portion 11, which can reduce light loss and help to achieve uniform transmission of light.
[0060] In one embodiment, the support frame 2 includes a main body 21 and a cover plate 22 connected to the main body 21, a receiving space is formed between the cover plate 22 and the main body 21, the annular light guide body 12 is arranged on the main body 21, and the light inlet portion 11 is accommodated in the receiving space.
[0061] Specifically, the main body 21 and the cover plate 22 are in a split form, and they are connected in a detachable manner to facilitate the installation of the light guide 1. On the main body 21, a cylindrical support portion is designed to match the shape of the annular light guide body 12. When installing the light guide 1, first install the annular light guide body 12 on the cylindrical support portion, then place the light inlet portion 11 in the accommodating space, and fix it on the main body 21 through the mounting plate 13, and finally snap the cover plate 22 onto the main body 21.
[0062] Furthermore, the cover plate 22 is also used to block the light emitted by the light inlet 11. The edge of the cover plate 22 at one end close to the annular light guide body 12 is adapted to the shape of the annular light guide body 12, so that when observing from the side of the light-emitting part of the light guide 1, only the light emitted by the annular light guide body 12 can be seen, but the light emitted by the light inlet 11 cannot be seen. This shielding design helps to improve the focusing effect and visual effect of the annular light beam.
[0063] In one embodiment, the light inlet portion 11 is an arc-shaped column, and the shapes of the accommodating space formed by the cover plate 22 and the main body 21 are adapted to each other, so that the light inlet portion 11 can be stably supported.
[0064] In one embodiment, if Figure 5 As shown, the lighting device further includes an annular thick-walled member 3 .
[0065] Specifically, the annular thick-walled member 3 is arranged on the cylindrical support portion of the main body 21, and is generally in the form of a cylindrical thick-walled member. Further, the annular thick-walled member 3 is usually made of a transparent material. The main function of the annular thick-walled member 3 is to make the light-emitting part of the headlight more uniform and soft, thereby increasing the overall aesthetics of the headlight.
[0066] In addition, the annular thick-walled member 3 can also effectively absorb external impact force, thereby protecting the light guide member 1 and other components inside the vehicle lamp.
[0067] In one embodiment, if Figures 5 to 9 As shown, the annular thick-walled member 3 is provided with a light inlet end 31 and a light outlet end 32 along the axial direction, and the light inlet end 31 and the light outlet end 32 are two ends of the annular thick-walled member 3. Further, the light inlet end 31 faces the annular light guide body 12, or in other words, the light inlet end 31 is close to the annular light guide body 12, and the light outlet end 32 is far away from the annular light guide body 12.
[0068] Furthermore, if Figure 6 and 7 As shown, the light incident end 31 of the annular thick-walled member 3 is provided with a fourth light guiding structure 311. The fourth light guiding structure 311 is formed by a plurality of step-shaped structures uniformly arranged on the surface of the light incident end 31 and connected to each other, or the shape can be understood as the fourth light guiding structure 311 being a "corn-like" structure.
[0069] Specifically, the fourth light guiding structure 311 can cause the light to refract at the light incident end 31, thereby increasing the angle of light diffusion and making the light softer, thereby ensuring that the light complies with relevant legal provisions and improving the uniformity of the light to a certain extent.
[0070] Furthermore, if Figure 8 and 9 As shown, the light output end 32 of the annular thick-walled member 3 is provided with a third light guiding structure 321. Specifically, the third light guiding structure 321 is similar to the fourth light guiding structure 311, and is formed by a plurality of step-shaped structures uniformly arranged on the surface of the light output end 32 and connected to each other. It can also be understood that the third light guiding structure 321 is a structure similar to "corn kernels".
[0071] Similarly, when light is incident from the light input end 31 to the light output end 32, the third light guiding structure 321 can cause the light to be refracted again at the light output end 32, so that the angle of light diffusion is increased again, and the light becomes softer, thereby ensuring that the light complies with relevant legal provisions and at the same time improving the uniformity of the light to a certain extent.
[0072] In combination with the above scheme, the light emitted from the light guide 1 enters the light input end 31, and then is refracted multiple times by the fourth light guide structure 311 and the third light guide structure 321 in sequence, and then is emitted from the light output end 32. Such a lighting device can make the light emitted from the light source undergo repeated reflection and refraction, so that the uniformity and diffusion of the light are improved to a certain extent. In this way, the light output end 32 can produce a softer and more uniform light output effect, thereby improving the light uniformity and lighting quality of the lighting system.
[0073] It should be understood that as the length of the annular thick-walled member 3 increases, the distance between the light-emitting end 32 and the LED light source becomes farther, and the brightness of the LED light source or bright spot seen by the human eye becomes much weaker. This method can improve the uniformity of the light on the light-emitting surface. Therefore, in some related technologies, in order to improve the uniformity of light and the effect of light output, the size of the annular thick-walled member 3 along the light-emitting direction is increased.
[0074] The lighting device provided by the utility model is provided with a light guiding structure for improving uniformity at the light source of the lighting device, that is, the light guide member 1, so that the light is uniformly processed in the initial transmission stage, thereby reducing the length of the annular thick-walled member 3 along the light emitting direction. In this way, the length of the annular thick-walled member 3 along the light emitting direction can be reduced, which is beneficial to the spatial layout of the entire lighting device.
[0075] The utility model provides a vehicle, comprising the lighting device as described above. Since the lighting device has the above characteristics and advantages, the lighting system of the vehicle can provide a more uniform and soft lighting effect, thereby enhancing the driver's sense of security and comfort. In addition to improving the lighting effect, the optimization of the spatial layout of the lighting device also helps to improve the appearance design of the entire vehicle, thereby enhancing the overall image and market competitiveness of the vehicle.
[0076] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A light guide, characterized in that: include: Ring-shaped light guide body; The light inlet portion has an incident end and an output end, wherein the incident end is used to introduce light, and the output end is connected to the annular light guide body along the tangent direction of the annular light guide body so that the light enters the annular light guide body from the output end along the tangent direction.
2. The light guide according to claim 1, characterized in that: In the axial direction along the annular light-guiding body, the annular light-guiding body has a light-emitting direction, and the annular light-guiding body includes a light-emitting part facing the light-emitting direction and a backlight part away from the light-emitting direction, and the backlight part is provided with a first light-guiding structure along the circumference, and at least part of the light can be emitted toward the light-emitting direction after being reflected by the first light-guiding structure.
3. The light guide according to claim 2, characterized in that: The emission end is provided with a second light guiding structure, and at least part of the light can be emitted toward the light emission direction after being reflected by the second light guiding structure.
4. The light guide according to claim 3, characterized in that: The first light guiding structure and / or the second light guiding structure are grooves arranged at intervals.
5. A lighting device, characterized in that: include: Support frame; The light guide according to any one of claims 1 to 4, wherein the light guide is arranged on the support frame; A light source is arranged at the incident end.
6. The lighting device according to claim 5, characterized in that: The support frame includes a main body and a cover plate connected to the main body, a receiving space is formed between the cover plate and the main body, the annular light guide body is arranged on the main body, and the light inlet portion is accommodated in the receiving space.
7. The lighting device according to claim 6, characterized in that: The lighting device further comprises: An annular thick-walled member is arranged on the main body, and is provided with a light input end and a light output end along the axial direction, wherein the light input end faces the annular light-guiding body.
8. The lighting device according to claim 7, characterized in that: The light output end is provided with a third light guiding structure.
9. The lighting device according to claim 7 or 8, characterized in that: The light input end is provided with a fourth light guiding structure.
10. A vehicle, characterized in that: include: A lighting device as claimed in any one of claims 5 to 9.