Vehicle-mounted electronic rearview mirror
Patent Information
- Application Number
- CN202522065518.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-09-25
AI Technical Summary
然而，该设计也带来了显著的装配精度挑战：在保护镜片与镜面反射层的对位组装过程中，若两者轮廓产生可见的位置偏差（例如镜面反射层的边缘与保护镜片的边缘的距离不均、反射图案倾斜或偏移），将导致光学畸变、成像区域不对称或镜面外观瑕疵，往往会造成产品的外观不合格，严重影响产品合格率
这种车载电子后视镜通过在保护镜片的边缘轮廓外侧面周向形成边缘凸弧面，该边缘凸弧面能够对外界光产生不规则的表面反射，以掩盖镜面反射层的边缘轮廓处在保护镜片的边缘轮廓之内而形成的错位，由此可以降低镜面反射层与保护镜片对位轮廓偏差的可见性，由此降低对位要求，从而降低制造难度。
Smart Images
Figure CN224690090U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive rearview mirrors, specifically to an in-vehicle electronic rearview mirror. Background Technology
[0002] As an important safety and intelligent component of modern automobiles, in-vehicle electronic rearview mirrors have gradually evolved from traditional optical mirrors into composite systems that integrate functions such as streaming media display, anti-glare, and blind spot monitoring.
[0003] A typical structure of an automotive electronic rearview mirror includes an outer protective lens and an inner mirror reflective layer. The mirror reflective layer is specially designed to achieve functions such as streaming media and anti-glare. It is generally in the form of a semi-transparent mirror film, a polarizing mirror film, or an insulating mirror film. In specific implementations, the mirror reflective layer can be formed by: depositing a patterned reflective film on the rear side of the protective lens, attaching a polarizing reflective film to the rear side of the protective lens, or setting a reflective film on the surface of an independent carrier plate (such as a liquid crystal light valve), and then assembling it with the protective lens assembly.
[0004] Currently, in the assembly or manufacturing process of such automotive electronic rearview mirrors, the reflective layer typically requires independent processing or attachment, rather than being processed and formed simultaneously with the protective lens. Consequently, its outline often fails to perfectly align with the outer edge of the protective lens, resulting in misalignment. Therefore, the edge contour of the reflective layer often appears recessed relative to the edge contour of the protective lens, forming an independent contour shape. However, this design also presents significant challenges to assembly precision: during the alignment and assembly of the protective lens and the reflective layer, if there is a visible positional deviation in their contours (e.g., uneven distance between the edges of the reflective layer and the protective lens, tilted or offset reflection patterns), it will lead to optical distortion, asymmetrical imaging areas, or surface defects, often resulting in product appearance defects and severely impacting the product yield. Therefore, the industry has imposed extremely stringent requirements on the assembly precision of this type of electronic rearview mirror; for example, the alignment deviation between the reflective layer and the protective lens must be controlled within 0.2 mm, which greatly increases the manufacturing difficulty of this type of rearview mirror. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a vehicle-mounted electronic rearview mirror that reduces the alignment requirements between the protective lens and the reflective layer, thereby reducing its manufacturing difficulty. The technical solution adopted is as follows: A vehicle-mounted electronic rearview mirror includes a protective lens and a mirror reflective layer. The mirror reflective layer is disposed on the rear side of the protective lens, and the edge contour of the mirror reflective layer is within the edge contour of the protective lens. The protective lens is characterized by having an annular convex arc surface at the edge contour of its outer side.
[0006] The protective lens can be made of glass, and its edge contour is formed by edge processing; the protective lens can also be made of plastic, and its edge contour is formed by injection molding.
[0007] In the aforementioned vehicle electronic rearview mirror, the edge contour of the mirror reflective layer is located within the edge contour of the protective lens, resulting in a misalignment. The outer side of the edge contour of the protective lens has a convex arc surface in the circumferential direction. This convex arc surface can produce irregular surface reflection of external light to cover up the misalignment between the edge contour of the mirror reflective layer and the edge contour of the protective lens. This reduces the visibility of the misalignment between the mirror reflective layer and the protective lens, thereby reducing the alignment requirements and thus reducing the manufacturing difficulty.
[0008] As a preferred embodiment of this invention, the width of the convex arc surface at the edge of the protective lens is at least 2 mm. This allows the convex arc surface at the edge of the protective lens to cover a sufficient width, preventing local misalignment.
[0009] As a further preferred embodiment of this invention, the thickness of the protective lens is at least 1.5 mm. This allows the convex surface at the edge to have sufficient curvature, resulting in adequate imaging distortion.
[0010] As a preferred embodiment of this utility model, the distance between the edge contour of the mirror reflective layer and the edge contour of the protective lens is less than the width of the edge convex arc surface of the protective lens.
[0011] As a further preferred embodiment of this invention, the distance between the edge contour of the specular reflective layer and the edge contour of the protective lens is 0.1-0.5 mm. This allows for a more relaxed alignment requirement between the protective lens and the specular reflective layer, making it suitable for mass production.
[0012] As a further preferred embodiment of this invention, the distance between the edge contour of the specular reflective layer and the edge contour of the protective lens is 0.2-0.5 mm. This allows for a more relaxed alignment requirement between the protective lens and the specular reflective layer, making it more suitable for mass production.
[0013] As a preferred embodiment of this invention, the refractive index of the protective lens is at least 1.5. This results in higher surface reflectivity and better concealing performance.
[0014] As a preferred embodiment of this utility model, the edge convex arc surface of the protective lens is a smooth surface. This makes the transition between the edge convex arc surface of the protective lens and the middle area of the protective lens more natural and aesthetically pleasing, and it has stronger specular reflection, which can further cover up the misalignment between the edge contour of the masking specular reflection layer and the edge contour of the protective lens.
[0015] As a preferred embodiment of this utility model, the mirror reflective layer is a coating disposed on the inner surface of the protective lens.
[0016] As another preferred embodiment of this utility model, the mirror reflective layer is a reflective film (such as a polarizing reflective film) attached to the inner surface of the protective lens.
[0017] As a preferred embodiment of this utility model, a carrier plate (such as a liquid crystal light valve) is provided on the inner side of the protective lens, and the mirror reflection layer is provided on the surface of the carrier plate.
[0018] Compared with the prior art, this utility model has the following advantages: This type of vehicle electronic rearview mirror forms a convex arc surface on the outer side of the edge contour of the protective lens. This convex arc surface can produce irregular surface reflection of external light to cover the misalignment caused by the edge contour of the mirror reflective layer being within the edge contour of the protective lens. This reduces the visibility of the misalignment between the mirror reflective layer and the protective lens, thereby reducing the alignment requirements and thus reducing the manufacturing difficulty. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted electronic rearview mirror according to a preferred embodiment of this utility model.
[0020] Figure 2 yes Figure 1 The exploded view of the vehicle's electronic rearview mirror shown.
[0021] Figure 3 yes Figure 1 The image shows a partial cross-sectional view of the vehicle's electronic rearview mirror.
[0022] Figure 4 This is a partial cross-sectional view of the vehicle-mounted electronic rearview mirror according to the preferred embodiment of the present invention, Example 2. Detailed Implementation
[0023] Example 1: As Figures 1-3 As shown, this vehicle electronic rearview mirror includes a protective lens 1 and a mirror reflective layer 2. The outer edge contour of the protective lens 1 is provided with an annular edge convex arc surface 102. The mirror reflective layer 2 is disposed on the rear side of the protective lens 1, and the edge contour 201 of the mirror reflective layer 2 is within the edge contour 101 of the protective lens 1.
[0024] In this embodiment, the protective lens 1 is made of glass, and its edge contour 201 is formed by edge processing.
[0025] In this embodiment, the width of the convex arc surface 102 at the edge of the protective lens 1 is at least 2 mm. This allows the convex arc surface 102 at the edge of the protective lens 1 to cover a sufficient width, preventing local misalignment.
[0026] In this embodiment, the thickness of the protective lens 1 is at least 1.5 mm. This allows the edge convex surface 102 to have sufficient curvature, resulting in sufficient imaging distortion.
[0027] The distance between the edge contour 201 of the specular reflective layer 2 and the edge contour 101 of the protective lens 1 is less than the width 201 of the edge convex arc surface of the protective lens 1. In this embodiment, the distance between the edge contour 201 of the specular reflective layer 2 and the edge contour 101 of the protective lens 1 is 0.2-0.5 mm. This allows for a more relaxed alignment requirement between the protective lens 1 and the specular reflective layer 2, making it more suitable for mass production.
[0028] In this embodiment, the refractive index of the protective lens 1 is at least 1.5. This results in higher surface reflectivity and better masking performance.
[0029] In this embodiment, the edge convex arc surface 102 of the protective lens 1 is a smooth surface. This makes the transition between the edge convex arc surface 102 of the protective lens 1 and the middle area of the protective lens 1 more natural and aesthetically pleasing, and it has stronger specular reflection, which can further cover up the misalignment between the edge contour 201 of the masking specular reflection layer 2 and the edge contour 101 of the protective lens 1.
[0030] In this embodiment, the mirror reflective layer 2 is a reflective film (such as a polarizing reflective film) attached to the inner surface of the protective lens 1.
[0031] Example 2: Reference Figure 4 While all other parts are the same as in Embodiment 1, the difference lies in the following: In this embodiment, a carrier plate 3 (such as a liquid crystal light valve) is provided on the inner side of the protective lens 1, and the specular reflective layer 2 is disposed on the surface of the carrier plate 3. The protective lens 1 is made of plastic, and its edge contour 201 is formed by injection molding.
[0032] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles of this utility model patent are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, they should all fall within the protection scope of this utility model.
Claims
1. A vehicle-mounted electronic rearview mirror, comprising a protective lens and a specular reflective layer, wherein the specular reflective layer is disposed on the rear side of the protective lens, and the edge contour of the specular reflective layer is within the edge contour of the protective lens, characterized in that: The outer edge of the protective lens has an annular convex arc surface.
2. The vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: The width of the convex arc surface at the edge of the protective lens is at least 2 mm.
3. The vehicle-mounted electronic rearview mirror according to claim 2, characterized in that: The thickness of the protective lens is at least 1.5 mm.
4. The vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: The distance between the edge contour of the mirror reflective layer and the edge contour of the protective lens is less than the width of the edge convex arc surface of the protective lens.
5. A vehicle-mounted electronic rearview mirror according to claim 4, characterized in that: The distance between the edge contour of the mirror reflective layer and the edge contour of the protective lens is 0.1-0.5 mm.
6. A vehicle-mounted electronic rearview mirror according to claim 5, characterized in that: The distance between the edge contour of the specular reflective layer and the edge contour of the protective lens is 0.2-0.5 mm.
7. A vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: The refractive index of the protective lens is at least 1.
5.
8. A vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: The edge of the protective lens has a smooth convex arc surface.
9. A vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: The mirror-reflective layer is a coating disposed on the inner surface of the protective lens; or, the mirror-reflective layer is a reflective film attached to the inner surface of the protective lens.
10. A vehicle-mounted electronic rearview mirror according to claim 1, characterized in that: A carrier plate is provided on the inner side of the protective lens, and the mirror reflective layer is provided on the surface of the carrier plate.