In-Vehicle Camera Noise Suppression via Board Tilt and Resin Shielding
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Solution Overview
Problem
In-vehicle cameras generate noise due to high-speed data transmission through cables, which is exacerbated by their proximity to other electronic devices, necessitating a solution to suppress noise interference.
Innovation Solution
The in-vehicle camera design features a cable arrangement where the first and second boards are tilted at a predetermined angle within the casing, allowing the cable to be fixed to the first surface of each board, which are covered by the casing, thereby deviating the cable from the casing and reducing noise propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cable is arranged close to the boards for compact design, then the device size is reduced, but noise generated in the cable is easily propagated to the outside
Solution Approach 1:
A resin layer is introduced as an intermediary material between the cable and the external environment. This resin layer acts as a noise barrier that suppresses electromagnetic noise generated by the cable while allowing the cable to remain in its optimal position for data transmission. The resin material absorbs and shields noise without requiring additional complex shielding structures.
Solution Approach 2:
The patent utilizes a thin resin film or coating to wrap around or cover portions of the cable assembly. This flexible shell provides noise suppression while maintaining the compact form factor. The thin film structure allows the cable to be positioned close to the boards for compact design while still providing effective noise barrier functionality.
2Speed
If high-speed data transmission is implemented through cables, then image signal transmission speed is improved, but noise generation in the cable increases
Solution Approach 1:
The resin layer serves as a noise barrier that specifically targets electromagnetic noise generated during high-speed data transmission. It allows the cable to maintain high transmission speeds while suppressing the accompanying noise through the intermediary shielding material that absorbs and blocks electromagnetic interference.
3Device complexity
If the lower-side casing is arranged close to the boards, then the device structure is simplified, but noise from cables is easily propagated outside
Solution Approach 1:
Instead of complicating the casing structure to achieve noise suppression, the patent introduces a resin layer as a simple intermediary material that can be applied directly to the cable or board surfaces. This maintains the simplified structural arrangement while effectively blocking noise propagation through the resin's inherent electromagnetic shielding properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively suppresses noise interference and reduces manufacturing costs by shortening the cable length and improving assembly efficiency, ensuring the camera operates effectively even near other electronic devices like car radios.
Implementation Method 1
The imager converts the optical images obtained through the lens to image signals
Data Source
AI summary
An in-vehicle camera has a first board, a second board, a cable, and a casing. The first board is electrically connected with the second board through the cable. The casing has a first casing and a second casing. A first surface of the first board and a first surface of the second board face the first casing and are covered with the first casing. The first board and the second board are assembled with the first casing. A second surface of the first board and a second surface of the second board are covered with the second casing. One end part of the cable is fixed to the first surface of the first board and the other end part of the cable is fixed to the first surface of the second board.