Vehicle-mounted TOF module

Abstract

The embodiment of the invention provides a vehicle-mounted TOF (Time of Flight) module which comprises a shell made of a metal material, and a window is formed in the shell wall of one side of the shell; the TOF laser is assembled in the inner cavity of the shell and is arranged opposite to the window; and the glass cover plate is assembled on the shell and correspondingly covers the window, a layer of light-transmitting conductive film is plated on the surface of one side of the glass cover plate, and the light-transmitting conductive film is in conductive connection with the shell and is grounded through the shell. According to the vehicle-mounted TOF module provided by the embodiment of the invention, the light-transmitting conductive film is plated on the surface of one side of the glass cover plate, so that the problems of EMC radiation and ESD are well solved, and the anti-interference capability of the whole module and the stability of the module are effectively improved. Moreover, the coating treatment of the light-transmitting conductive film is completed when the glass cover plate is processed, and no additional assembly process is needed during subsequent assembly, so that the assembly efficiency is high, and the manufacturing cost is reduced. Only one thin layer of the light-transmitting conductive film does not need to be specially considered to reserve an installation space for the light-transmitting conductive film, thereby facilitating the subsequent further optimization of the size of the whole module.

Description

Technical Field

[0001] This invention relates to the field of vehicle sensor technology, and more particularly to a vehicle-mounted TOF module. Background Technology

[0002] A TOF (Time-of-Flight) module is a depth sensing module based on the principle of time-of-flight ranging, and it is widely used in many application devices, including automobiles and smartphones.

[0003] An existing automotive TOF module mainly includes a housing with a window on one side, a TOF laser assembled inside the housing and positioned facing the window, and a glass cover assembled on the housing and correspondingly covering the window. The TOF laser primarily uses a VCSEL (Vertical-cavity Surface-emitting Laser) in conjunction with a driver chip to achieve its laser emission function. To achieve long-range depth detection, the power of the TOF laser is very high; TOF lasers used in automobiles are typically 8W or 16W, and they emit at high frequencies, resulting in very high electromagnetic radiation that often interferes with other functional modules, affecting the overall vehicle safety performance. Therefore, existing automotive TOF modules usually incorporate a shielding cover for electromagnetic shielding.

[0004] However, existing vehicle-mounted TOF modules typically only have a shielding cover placed outside the TOF laser before being assembled inside the TOF module's housing. This shielding cover must also have openings to allow for viewing through external light, resulting in less than ideal electromagnetic shielding effectiveness. Electromagnetic radiation still exceeds standards, severely interfering with the normal operation of other devices / functional modules. Furthermore, as vehicle-mounted TOF modules become smaller and smaller, space becomes increasingly limited, making it difficult to find sufficient space to install the shielding cover. Even if space exists, it increases the complexity of the installation process and material costs. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a vehicle-mounted TOF module that can improve the electromagnetic shielding effect with a simple structure and low cost.

[0006] To address the aforementioned technical problems, the present invention first provides the following technical solution: a vehicle-mounted TOF module, comprising: The outer casing is made of metal, and a window is provided on one side of the casing wall; A TOF laser assembled within the cavity of the housing and positioned directly opposite the window; and A glass cover plate is assembled on the housing and correspondingly covers the window. A light-transmitting conductive film is coated on one side surface of the glass cover plate. The light-transmitting conductive film is electrically connected to the housing and grounded through the housing.

[0007] Furthermore, the light-transmitting conductive film is a silver nanofilm or an ITO film.

[0008] Furthermore, the light-transmitting conductive film is electrically connected to the outer shell via conductive adhesive.

[0009] Furthermore, the light-transmitting conductive film is disposed on the inner surface of the inner cavity of the glass cover facing the outer shell.

[0010] Furthermore, the thickness of the transparent conductive film is 10-30 nanometers.

[0011] Furthermore, the vehicle-mounted TOF module also includes a circuit board assembled in the inner cavity of the housing, and the TOF laser is assembled on the circuit board.

[0012] Furthermore, a recess is formed on the side wall of the outer shell where the window is located, the window is located in the middle of the bottom wall of the recess, and the glass cover is entirely accommodated in the recess.

[0013] After adopting the above technical solution, the embodiments of the present invention have at least the following beneficial effects: The vehicle-mounted TOF module provided by the embodiments of the present invention can effectively solve the problems of EMC (Electromagnetic Compatibility) radiation and ESD (Electro-Static Discharge) by coating a layer of light-transmitting conductive film on one side surface of the glass cover. It not only provides good shielding against high-power, high-frequency electromagnetic radiation, but also has a good ESD grounding effect, thereby effectively improving the overall anti-interference capability and stability of the module. Moreover, the coating treatment of the light-transmitting conductive film is completed during the processing of the glass cover, eliminating the need for additional assembly processes in subsequent assembly, resulting in high assembly efficiency and reduced manufacturing costs. In addition, the light-transmitting conductive film is only a thin layer, eliminating the need to reserve installation space for it, which is beneficial for further optimization of the overall module size. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an optional embodiment of the vehicle-mounted TOF module of the present invention. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0016] like Figure 1 As shown, an optional embodiment of the present invention provides a vehicle-mounted TOF module, comprising: The outer shell 1 is made of metal material, and a window 10 is provided on one side of the shell wall; A TOF laser 3 is assembled in the inner cavity 12 of the housing 1 and positioned directly opposite the window 10; and A glass cover plate 5 is assembled on the outer shell 1 and correspondingly covers the window 10. A light-transmitting conductive film 50 is coated on one side surface of the glass cover plate 5. The light-transmitting conductive film 50 is electrically connected to the outer shell 1 and grounded through the outer shell 1.

[0017] The vehicle-mounted TOF module provided in this embodiment of the invention effectively solves EMC radiation and ESD problems by coating a layer of transparent conductive film 50 on one side surface of the glass cover plate 5. It not only provides excellent shielding against high-power, high-frequency electromagnetic radiation but also exhibits good ESD grounding performance, thereby effectively improving the overall anti-interference capability and stability of the module. Furthermore, the coating process of the transparent conductive film 50 is completed during the fabrication of the glass cover plate 5, eliminating the need for additional assembly steps during subsequent assembly, resulting in high assembly efficiency and reduced manufacturing costs. In addition, the transparent conductive film 50 is only a thin layer, eliminating the need for special consideration in reserving installation space, which facilitates further optimization of the overall module size.

[0018] In an optional embodiment of the present invention, the light-transmitting conductive film 50 is a nano-silver film or an ITO film. This embodiment provides two light-transmitting conductive films 50 made of different materials, both of which can achieve the dual functions of light transmission and conductivity, and can be flexibly selected according to actual needs during specific implementation.

[0019] In an optional embodiment of the present invention, such as Figure 1 As shown, the light-transmitting conductive film 50 is electrically connected to the outer shell 1 via conductive adhesive 52. In this embodiment, the conductive adhesive 52 effectively connects the light-transmitting conductive film 50 and the outer shell 1, achieving not only conductivity but also firmly bonding the glass cover 1 to the outer shell 1, thus assembling the glass cover 1. It is understood that the light-transmitting conductive film 50 may also achieve a conductive connection to the outer shell 1 through methods such as wire connection or direct contact.

[0020] In an optional embodiment of the present invention, such as Figure 1As shown, the light-transmitting conductive film 50 is disposed on the inner surface of the inner cavity 12 of the glass cover plate 5 facing the outer shell 1. In this embodiment, by disposing the light-transmitting conductive film 50 on the inner surface of the inner cavity 12 of the glass cover plate 5 facing the outer shell 1, the light-transmitting conductive film 50 can be protected by the outer glass cover plate 5, preventing damage to the light-transmitting conductive film from external foreign objects.

[0021] In an optional embodiment of the present invention, the thickness of the light-transmitting conductive film 50 is 10-30 nanometers. This embodiment limits the thickness of the light-transmitting conductive film 50 to the nanometer level, which essentially does not affect the original assembly position relationship between the glass cover 5 and the outer shell 1, and does not significantly increase the overall thickness of the module, thus facilitating further optimization of the overall module size. It is understood that... Figure 1 For ease of representation, the thickness of the light-transmitting conductive film 50 has been significantly increased.

[0022] In an optional embodiment of the present invention, such as Figure 1 As shown, the vehicle-mounted TOF module also includes a circuit board 7 assembled in the inner cavity 12 of the housing 1, and the TOF laser 3 is assembled on the circuit board 7. In this embodiment, by setting a single circuit board 7, the TOF laser 3 and other circuit components of the TOF module can be integrated on the circuit board 7, which helps to reduce the space occupied by each component and optimize the overall size of the module.

[0023] In an optional embodiment of the present invention, such as Figure 1 As shown, a recess 14 is formed on the side wall of the outer casing 1 where the window 10 is located. The window 10 is disposed in the middle of the bottom wall of the recess 14, and the glass cover 5 is entirely accommodated within the recess 14. In this embodiment, by forming a recess 14 on the shell wall of the outer casing 1 and accommodating the glass cover 5 entirely within the recess 14, the edges of the glass cover 5 can be prevented from protruding, thus achieving a protective effect.

[0024] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many variations under the guidance of the present invention without departing from the inventive spirit and scope of protection of the claims. These variations are all within the scope of protection of the present invention.

Claims

1. A vehicle-mounted TOF module, comprising: a housing made of a metal material, a window being formed in a side wall of the housing; a TOF laser assembled in an inner cavity of the housing and arranged opposite to the window; and a glass cover plate assembled on the housing and corresponding to cover the window; characterized in that a light-transmitting conductive film is plated on a side surface of the glass cover plate, the light-transmitting conductive film being conductively connected with the housing and grounded through the housing.

2. The vehicle-mounted TOF module according to claim 1, wherein, The light-transmitting conductive film is a nano-silver film or an ITO film. 3.The vehicle-mounted TOF module according to claim 1 or 2, characterized in that, The light-transmitting conductive film is conductively connected with the housing through conductive glue. 4.The vehicle-mounted TOF module according to claim 1 or 2, wherein, The light-transmitting conductive film is arranged on an inner surface of the glass cover plate facing the inner cavity of the housing. 5.The vehicle-mounted TOF module according to claim 1 or 2, wherein, The thickness of the light-transmitting conductive film is 10-30 nanometers. 6.The vehicle-mounted TOF module according to claim 1, wherein, The vehicle-mounted TOF module further comprises a circuit board assembled in the inner cavity of the housing, and the TOF laser is assembled on the circuit board.

7. The vehicle-mounted TOF module of claim 1, wherein, The side wall of the housing corresponding to the window is formed with a recess, the window is arranged in a middle part of a bottom wall of the recess, and the glass cover plate is accommodated in the recess as a whole.

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