Vehicle-mounted TOF module

Abstract

The utility model discloses an on -vehicle TOF module, including substrate, TOF laser, annular support and diffusion plate, TOF laser with the annular support is assembled in the same side board surface of substrate and the annular support surrounds TOF laser setting, the diffusion plate is assembled on the one end of annular support away from substrate and covers TOF laser correspondingly, the annular support adopts metal material to make, still be equipped with the ground connection of ground part of external grounding circuit electricity respectively with annular support on the substrate and. This embodiment sets up the ground part of connecting external grounding circuit on the substrate, and the corresponding annular support adopts metal to make and is connected with ground part electricity, thereby can utilize the electromagnetic shielding of ground annular support to the TOF laser of working time, and the radiation interference of TOF laser working to outside is reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of vehicle sensor technology, and in particular 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 devices, including automobiles and smartphones.

[0003] A traditional Time-of-Flight (TOF) module mainly includes a substrate, a TOF laser, a ring-shaped support, and a diffuser plate. The TOF laser and the ring-shaped support are assembled on the same side of the substrate, with the ring-shaped support surrounding the TOF laser. The diffuser plate is assembled at the end of the support away from the substrate, correspondingly covering the TOF laser. The TOF laser typically uses a VCSEL (Vertical-cavity Surface-emitting Laser) in conjunction with a driver chip to emit laser light.

[0004] To achieve medium- to long-range depth detection, Time-of-Flight (TOF) lasers require extremely high power. Furthermore, automotive TOF modules typically emit light at high frequencies, resulting in significant electromagnetic radiation. The ring-shaped support of traditional TOF modules is usually made of plastic, which cannot shield against this radiation. This often causes electromagnetic interference to other functional modules during operation, affecting the overall vehicle safety. In addition, TOF lasers generate considerable heat during operation, and existing TOF modules lack effective heat dissipation structures, making them prone to overheating and impacting their lifespan. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide a vehicle-mounted TOF module that can effectively improve the electromagnetic shielding effect.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a vehicle-mounted TOF module, comprising a substrate, a TOF laser, an annular bracket, and a diffuser plate, wherein the TOF laser and the annular bracket are assembled on the same side of the substrate and the annular bracket is arranged around the TOF laser, and the diffuser plate is assembled on the end of the annular bracket away from the substrate and correspondingly covers the TOF laser; the annular bracket is made of metal material, and the substrate is also provided with a grounding part that is electrically connected to the annular bracket and an external grounding circuit respectively.

[0007] Furthermore, the grounding portion includes a metallized hole penetrating the substrate, and the metallized hole is electrically connected to the external grounding circuit.

[0008] Furthermore, a plurality of metallized holes are uniformly distributed around the TOF laser on the substrate.

[0009] Furthermore, the grounding portion also includes pads disposed on the side of the substrate away from the annular bracket, electrically connected to the metallized holes one by one, and also electrically connected to the external grounding circuit.

[0010] Furthermore, the bottom end face of the annular bracket presses against the opening at the corresponding end of the metallized hole, thereby electrically connecting with the corresponding metallized hole.

[0011] Furthermore, the annular support is made of a metal with high thermal conductivity.

[0012] Furthermore, the annular support is formed on the substrate using an electroplating thickening process or a 3D printing process.

[0013] Furthermore, the top periphery of the annular support is recessed to form a step, and the diffuser plate is bonded and fixed to the step by an adhesive layer.

[0014] Furthermore, the substrate is a ceramic substrate.

[0015] Furthermore, the TOF laser is a VCSEL laser.

[0016] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: The present utility model embodiment uses metal material to make a ring bracket corresponding to the surrounding TOF laser, and sets a ground part on the substrate to connect the ring bracket and the external grounding circuit. Thus, the grounded ring bracket is used to achieve electromagnetic shielding of the TOF laser during operation, which greatly reduces the radiation interference of the TOF laser to the outside when it is working. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the split structure of an optional embodiment of the vehicle-mounted TOF module of this utility model.

[0018] Figure 2 This is a schematic diagram of the assembly structure of an optional embodiment of the vehicle-mounted TOF module of this utility model.

[0019] Figure 3 This is a cross-sectional structural diagram of an optional embodiment of the vehicle-mounted TOF module of this utility model. Detailed Implementation

[0020] The present application will be further described in detail below 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 utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0021] like Figures 1-3 As shown, an optional embodiment of this utility model provides a vehicle-mounted TOF module, including a substrate 1, a TOF laser 3, an annular bracket 5, and a diffuser plate 7. The TOF laser 3 and the annular bracket 5 are assembled on the same side of the substrate 1, and the annular bracket 5 is arranged around the TOF laser 3. The diffuser plate 7 is assembled on the end of the annular bracket 5 away from the substrate 1 and correspondingly covers the TOF laser 3. The annular bracket 5 is made of metal material, and the substrate 1 is also provided with a grounding part 10 that is electrically connected to the annular bracket 5 and an external grounding circuit respectively.

[0022] This utility model embodiment uses a metal material to make an annular bracket 5 that surrounds the TOF laser 3, and a grounding part 10 is provided on the substrate 1 to connect the annular bracket 5 and the external grounding circuit. Thus, the grounded annular bracket 5 is used to achieve electromagnetic shielding of the TOF laser 3 during operation, which greatly reduces the radiation interference of the TOF laser 3 when it is working.

[0023] In one optional embodiment of this utility model, such as Figure 1 and Figure 3 As shown, the grounding portion 10 includes a metallized via 101 penetrating the substrate 1, and the metallized via 101 is electrically connected to the external grounding circuit. In circuit board manufacturing, metallized vias are a common structure used to connect lines between different layers of the circuit board 1. In this embodiment, the metallized via 101 is used to achieve electrical connection between the annular support and the external grounding circuit, which facilitates the design and manufacturing of the relevant lines on the substrate 1.

[0024] In one optional embodiment of this utility model, such as Figure 1 and Figure 3 As shown, a plurality of metallized holes 101 are uniformly distributed around the TOF laser 3 on the substrate 1. In this embodiment, by uniformly distributing a plurality of metallized holes 101 around the TOF laser 3, it is equivalent to having multiple parallel branches grounded simultaneously, which is beneficial to improving the grounding effect and electromagnetic shielding effect of the ring bracket 5.

[0025] In one optional embodiment of this utility model, such as Figure 3As shown, the grounding portion 10 also includes a pad 103 disposed on the side of the substrate 1 opposite to the annular bracket 5, electrically connected to the metallized hole 101 and also electrically connected to the external grounding circuit. In this embodiment, by providing the pad 103, when the vehicle-mounted TOF module is assembled as a whole into other circuits, it can be connected to the grounding circuit in other circuits through the pad 103 to achieve grounding. In specific implementation, the side of the substrate 1 with the pad 12 can also be provided with corresponding wiring pads 14 to realize the wiring between the TOF laser 3 and the external circuit.

[0026] In an optional embodiment of this utility model, the bottom end face of the annular bracket 5 presses against the opening of the corresponding end of the metallized hole 101 and is electrically connected to the metallized hole 101. In this embodiment, directly pressing the bottom end face of the annular bracket 5 against the opening of the metallized hole 101 helps to save space and avoids affecting the layout of other circuits on the substrate 1.

[0027] In an optional embodiment of this utility model, the annular bracket 5 is made of a metal with high thermal conductivity. In this embodiment, the annular bracket 5 is made of a metal with high thermal conductivity, allowing the heat generated by the TOF laser 3 during operation to be quickly dissipated through the annular bracket 5, enhancing the heat dissipation performance of the vehicle-mounted TOF module and preventing heat accumulation. Specifically, high thermal conductivity refers to good thermal conductivity, enabling rapid heat transfer; the specific metal material can be silver, copper, aluminum alloy, etc., with copper being preferred due to its good thermal conductivity and high overall cost-effectiveness.

[0028] In an optional embodiment of this utility model, the annular support 5 is formed on the substrate 1 using an electroplating thickening process or a 3D printing process. In this embodiment, the annular support 5 can be directly integrally formed on the substrate 1 using an electroplating thickening process or a 3D printing process, resulting in a firm bond with the substrate 1, good overall integrity, and improved heat conduction.

[0029] In one optional embodiment of this utility model, such as Figure 1 and Figure 3 As shown, a step 50 is formed by a recess at the top periphery of the annular support 5, and the diffuser plate 7 is bonded and fixed to the step 50 by means of an adhesive layer 70. In this embodiment, the diffuser plate 7 is bonded and fixed to the step 50 by means of an adhesive layer 70, which can achieve the positioning of the diffuser plate 7. In specific implementation, the step 50 can be symmetrically arranged at the top of the annular support, thereby stably supporting the diffuser plate 7; of course, as Figure 1 As shown, it can also be designed directly as a ring, which can ensure the sealing of the ring support 5 after the diffuser plate 7 is assembled.

[0030] In an optional embodiment of this invention, the substrate 1 is a ceramic substrate. In this embodiment, the ceramic substrate is not easily deformed at high operating temperatures and has excellent heat dissipation performance, which can quickly dissipate the heat generated by the TOF laser 3 during operation.

[0031] In one optional embodiment of this utility model, the TOF laser 3 is a VCSEL laser 3. In specific implementations, such as... Figure 1 and Figure 3 The VCSEL laser 3 includes a VCSEL chip 30 and a photodiode 32. The VCSEL chip 30 and the photodiode 32 are first mounted on predetermined positions on the substrate 1 using a surface mount technology, and then connected to corresponding circuits on the substrate 1 using a wire bonding process.

[0032] 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 other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A vehicle-mounted TOF module, comprising a substrate, a TOF laser, an annular bracket, and a diffuser plate, wherein the TOF laser and the annular bracket are assembled on the same side surface of the substrate and the annular bracket is arranged around the TOF laser, and the diffuser plate is assembled on the end of the annular bracket away from the substrate and correspondingly covers the TOF laser; characterized in that, The ring-shaped support is made of metal material, and the base plate is also provided with a grounding part that is electrically connected to the ring-shaped support and the external grounding circuit respectively.

2. The vehicle-mounted TOF module as described in claim 1, characterized in that, The grounding portion includes a metallized via penetrating the substrate, and the metallized via is electrically connected to the external grounding circuit.

3. The vehicle-mounted TOF module as described in claim 2, characterized in that, The substrate has a plurality of metallized holes uniformly distributed around the TOF laser.

4. The vehicle-mounted TOF module as described in claim 2 or 3, characterized in that, The grounding portion also includes a pad disposed on the side of the substrate opposite to the annular support, electrically connected to the metallized hole and also electrically connected to the external grounding circuit.

5. The vehicle-mounted TOF module as described in claim 2, characterized in that, The bottom end face of the annular bracket presses against the opening at the corresponding end of the metallized hole and is electrically connected to the corresponding metallized hole.

6. The vehicle-mounted TOF module as described in claim 1, characterized in that, The annular support is made of a metal with high thermal conductivity.

7. The vehicle-mounted TOF module as described in claim 1, 5, or 6, characterized in that, The ring-shaped support is formed on the substrate using an electroplating thickening process or a 3D printing process.

8. The vehicle-mounted TOF module as described in claim 1, characterized in that, The top of the annular support has a recessed step, and the diffuser plate is bonded and fixed to the step by an adhesive layer.

9. The vehicle-mounted TOF module as described in claim 1, characterized in that, The substrate is a ceramic substrate.

10. The vehicle-mounted TOF module as described in claim 1, characterized in that, The TOF laser is a VCSEL laser.

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