Active defogging structure of a vehicle lamp
By setting a superhydrophobic structure and water guide groove on the inner surface of the vehicle's light distribution lens, the problem of headlight fogging is solved, ensuring the lighting effect and driving safety of the headlights.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BMW BRILLIANCE AUTOMOTIVE
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-10
Smart Images
Figure CN224479549U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle lighting manufacturing technology, and specifically to an active defogging structure for vehicle lighting. Background Technology
[0002] With the continuous development of society, there are more and more types of vehicle lights. However, some vehicle lights have defects in use. For example, the problem of fogging in vehicle headlights has become a common problem in the industry. In humid air or in cases of large temperature differences, small water droplets easily condense on the inner surface of the light fixture, affecting the appearance and optical effect of the headlight, thereby affecting the driver's visibility and driving safety.
[0003] Furthermore, because vehicle headlights are often designed with an open structure to maintain the balance of internal and external air pressure, when the temperature changes, humid air enters the headlights and forms water mist, further exacerbating the safety hazards caused by headlight fogging. Utility Model Content
[0004] This utility model provides an active defogging structure for vehicle lights to solve the problems of fogging caused by humid air, large temperature difference between inside and outside, or open structure of existing vehicle lights.
[0005] According to an embodiment of the present invention, an active defogging structure for a vehicle lamp is provided. The active defogging structure for the vehicle lamp includes a lamp, the lamp including a housing and a light distribution lens, the light distribution lens being connected to the housing.
[0006] At least one superhydrophobic structure is provided on the inner surface of the lens, the superhydrophobic structure including grooves and / or protrusions, the superhydrophobic structure prevents water droplets from staying on the lens, thereby achieving a defogging effect.
[0007] In some embodiments, the superhydrophobic structure is a lattice, and the spacing between two adjacent points of the lattice ranges from 0.03 to 0.26 μm.
[0008] In some implementations, the cross-section of each point in the dot matrix is circular or polygonal.
[0009] In some embodiments, the diameter of the circle or the side length of the polygon ranges from 0.01 to 0.1 μm.
[0010] In some embodiments, the superhydrophobic structure is a line matrix, wherein the spacing between adjacent lines of the line matrix is 0.03-0.26 μm.
[0011] In some implementations, the width of each line in the line matrix ranges from 0.01 to 0.1 μm.
[0012] In some embodiments, the superhydrophobic structure is located in the central region of the lens.
[0013] In some embodiments, the superhydrophobic structure is located in the edge region of the lens.
[0014] In some embodiments, the superhydrophobic structure is positioned and sized such that it is disposed on a fogging area of the lens determined experimentally.
[0015] In some embodiments, the housing is provided with a water guide groove; and / or,
[0016] The active defogging structure of the vehicle lights also includes a moisture absorption device or a moisture removal device.
[0017] Compared with the prior art, the embodiments of this utility model have the following advantages:
[0018] The active defogging structure for vehicle lights provided in this embodiment of the invention achieves a defogging effect by providing at least one superhydrophobic structure on the inner surface of the lens. This superhydrophobic structure includes grooves or protrusions, preventing water droplets from remaining on the lens. The above technical solution effectively solves the problem of fogging in automotive headlights, ensuring the lighting effect and thus guaranteeing nighttime driving safety. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model.
[0020] Figure 1 This is a schematic diagram of the active defogging structure for vehicle headlights provided in some embodiments of this utility model;
[0021] Figure 2 This is a schematic diagram showing the location of the superhydrophobic structure provided in some embodiments of this utility model;
[0022] Figure 3 This is a schematic diagram illustrating the defogging principle of the superhydrophobic structure provided in some embodiments of this utility model;
[0023] Figure 4 This is a schematic diagram of the lattice structure in the superhydrophobic structure provided in some embodiments of this utility model;
[0024] Figure 5 This is a schematic diagram of the linear array in the superhydrophobic structure provided in some embodiments of this utility model.
[0025] Attached image annotations:
[0026] 1. Housing; 2. Lens; 3. Superhydrophobic structure; 31. Groove; 32. Dot matrix; 33. Linear matrix; 4. Water molecule structure; 5. Position of marker light or brake light. Detailed Implementation
[0027] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0030] In the description of this utility model, the reference to terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.
[0031] See Figure 1-5 As shown, an embodiment of this utility model discloses an active defogging structure for vehicle lights, the active defogging structure for vehicle lights comprising:
[0032] The lamp includes a housing 1 and a lens 2, the lens 2 being connected to the housing 1.
[0033] The innovation of this utility model embodiment lies in the combination of Figure 1 As shown, at least one superhydrophobic structure 3 is provided on the inner surface of the optical lens 2. The superhydrophobic structure 3 includes grooves or protrusions, combined with... Figure 2 As shown, the superhydrophobic structure 3 prevents water droplets from remaining on the lens, thereby achieving a defogging effect.
[0034] Specifically, the superhydrophobic structure 3 is provided on the entire or partial area of the light distribution lens 2, so that no water droplets or water mist are formed at the location where the superhydrophobic structure 3 is provided. In particular, no water droplets or water mist are formed in the optical area where the light from the lamp is emitted by the light distribution lens 2, further reducing the impact of water mist on the light.
[0035] Therefore, according to the embodiments of this utility model, by providing at least one superhydrophobic structure on the inner surface of the lens, the superhydrophobic structure including grooves or protrusions, water droplets cannot remain in the optical area of the lens, thereby achieving a defogging effect, effectively solving the problem of fogging of car headlights, ensuring the lighting effect of the headlights, and thus ensuring nighttime driving safety.
[0036] It should be noted that the aforementioned vehicle lights can be either headlights or taillights.
[0037] Specifically, the superhydrophobic structure is disposed at any location on the lens that is prone to fogging; optionally, it is combined with... Figure 2 As shown, the superhydrophobic structure can be set on the lens 2 at a position corresponding to the bulb, such as the position of the marker light or brake light.
[0038] Combination Figure 3 As shown, when the superhydrophobic structure is Figure 3 When the groove structure is shown, the diameter of the groove is smaller than the diameter of the water molecule structure 4. The water molecule structure is a water molecule cluster or a single water molecule, so that water mist cannot adhere to the light distribution mirror surface at that location. According to some other embodiments, when the superhydrophobic structure is a protrusion, the distance between each protrusion is also smaller than the diameter of the water molecule structure, so that water mist cannot be retained.
[0039] The groove or protrusion can be as follows: Figure 4 The dotted structure shown can also be based on Figure 5 The linear structure shown.
[0040] In some implementations, the inner surface of the automotive headlight lens is treated using an ultrashort pulse laser or an ultrafast laser to create a superhydrophobic structure. Specifically, the pre-treated lens is placed on the laser's worktable, the laser operation software is set to draw a dot matrix or line matrix pattern, the lens is placed within the laser area, and the laser is activated for processing. After processing, a high-performance, stable superhydrophobic structure with a micro-roughness is obtained.
[0041] It should be noted that the lasers that can emit ultrashort pulse lasers or ultrafast lasers are generally composed of an ultrashort pulse oscillator, a harmonic generator, a power amplifier, a grating, etc. They can be lasers from existing technologies, which will not be described in detail here.
[0042] In summary, according to the embodiments of this utility model, by providing at least one superhydrophobic structure on the inner surface of the lens, the superhydrophobic structure including grooves or protrusions, water droplets cannot remain in the optical area of the lens, thereby achieving a defogging effect, effectively solving the problem of fogging of car headlights, ensuring the lighting effect of the headlights, and thus ensuring nighttime driving safety.
[0043] In some embodiments, combined with Figure 4 As shown, the superhydrophobic structure is a lattice, and the spacing between two adjacent points of the lattice ranges from 0.03 to 0.26 μm.
[0044] Preferably, the distance between the two adjacent points is 0.05-0.15 μm.
[0045] It should be noted that the points in the dot matrix actually have a certain cross-sectional shape, which includes, but is not limited to, circles, ellipses, polygons, and other irregular shapes. Furthermore, the aforementioned spacing refers to the shortest distance between the edges of the shapes of two adjacent points.
[0046] In some alternative embodiments, the cross-section of each point in the lattice is circular or polygonal. The aforementioned circular and polygonal shapes are easy to form or manufacture, thereby reducing the difficulty and cost of forming superhydrophobic structures.
[0047] In some embodiments, the diameter of the circle or the side length of the polygon ranges from 0.01 to 0.1 μm.
[0048] According to this embodiment, a hydrophobic layer at the micron or even nanometer scale is formed on the inner surface of the light-transmitting lens, so that water mist cannot adhere to the surface, and the small water droplets formed after the water mist condenses on the inner surface can fall more smoothly.
[0049] In some embodiments, combined with Figure 5 As shown, the superhydrophobic structure is a matrix of lines, with the spacing between adjacent lines being 0.03-0.26 μm. Specifically, the resulting matrix can also be rectangular, rhomboid, triangular, or other shapes; no specific limitations are imposed here.
[0050] The spacing between the two lines mentioned above refers to the distance between the line boundaries. Preferably, the spacing ranges from 0.05 to 0.15 μm.
[0051] In some optional embodiments, the width of each line in the line matrix ranges from 0.01 to 0.1 μm.
[0052] Specifically, the value of the line width should take into account factors such as the diameter of the laser spot, the difficulty of processing, and the material of the lens.
[0053] In some alternative embodiments, the superhydrophobic structure is located in the central region of the lens. Positioning the superhydrophobic structure in the central region prevents water mist formation there.
[0054] Furthermore, by setting a superhydrophobic structure in the central area, the light from the lamp can be avoided by the concave and convex shape of the superhydrophobic structure, thus reducing the change in the direction of the light in the central area of the lens, thereby achieving the purpose of this utility model.
[0055] In some alternative embodiments, combined with Figure 2 As shown, the superhydrophobic structure is located in the edge region of the light distribution lens. Placing the superhydrophobic structure in the edge region of the light distribution lens allows water droplets to flow quickly into the water-guiding grooves on the housing.
[0056] In some embodiments, the location and size of the superhydrophobic structure are configured to be disposed on a fogging area of the lens determined experimentally.
[0057] Because different lamps have different structures, the locations where water mist is likely to form also differ. Therefore, a superhydrophobic structure is designed according to the locations where water mist is likely to form, which improves the targeted nature of the structure design and thus avoids the formation of water mist on the inner surface of the lens.
[0058] In some embodiments, a water channel (not shown) is provided on the housing. The water channel is located close to the superhydrophobic structure and is capable of receiving water flowing out from the superhydrophobic structure.
[0059] In addition, the active defogging structure of the vehicle lights also includes a moisture absorption device or a moisture exhaust device (not shown in the figure). Preferably, the moisture absorption device or moisture exhaust device can be a sponge cloth, a fan, etc., used to discharge or absorb the water mist generated inside the lights.
[0060] In summary, the vehicle lighting lens and active defogging structure disclosed in this embodiment of the present invention can achieve the following beneficial effects:
[0061] The active defogging structure for vehicle lights provided in this embodiment of the invention achieves a defogging effect by providing at least one superhydrophobic structure on the inner surface of the lens. This superhydrophobic structure includes grooves or protrusions, preventing water droplets from remaining in the optical area of the lens. The above technical solution effectively solves the problem of fogging in automotive headlights, ensuring the lighting effect of the headlights and thus guaranteeing nighttime driving safety.
[0062] It should be noted that although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.
Claims
1. An active defogging structure for a vehicle lamp, the active defogging structure comprising a lamp, the lamp comprising a housing and a lens, the lens being connected to the housing; characterized in that, At least one superhydrophobic structure is provided on the inner surface of the lens, the superhydrophobic structure including grooves and / or protrusions, the superhydrophobic structure prevents water droplets from staying on the lens, thereby achieving a defogging effect.
2. The active defogging structure for vehicle lights according to claim 1, characterized in that, The superhydrophobic structure is a lattice, and the spacing between two adjacent points of the lattice ranges from 0.03 to 0.26 μm.
3. The active defogging structure for vehicle lights according to claim 2, characterized in that, The cross-section of each point in the dot matrix is either circular or polygonal.
4. The active defogging structure for vehicle lights according to claim 3, characterized in that, The diameter of the circle or the side length of the polygon ranges from 0.01 to 0.1 μm.
5. The active defogging structure for vehicle lights according to claim 1, characterized in that, The superhydrophobic structure is a line matrix, and the spacing between two adjacent lines in the line matrix is 0.03-0.26 μm.
6. The active defogging structure for vehicle lights according to claim 5, characterized in that, The width of each line in the line matrix ranges from 0.01 to 0.1 μm.
7. The active defogging structure for vehicle lights according to any one of claims 1-6, characterized in that, The superhydrophobic structure is located in the central region of the optical lens.
8. The active defogging structure for vehicle lights according to any one of claims 1-6, characterized in that, The superhydrophobic structure is located in the edge region of the optical lens.
9. The active defogging structure for vehicle lights according to any one of claims 1-6, characterized in that, The position and size of the superhydrophobic structure are configured such that it is located on the fogging area of the lens as determined experimentally.
10. The active defogging structure for vehicle lights according to any one of claims 1-6, characterized in that, The housing is provided with a water guide groove; and / or, The active defogging structure of the vehicle lights also includes a moisture absorption device or a moisture removal device.