Automotive Camera Module Spaced PCB Shielding
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Solution Overview
Problem
Camera modules in automobiles are prone to positional deviation and damage due to external shocks and vibrations, particularly affecting the printed circuit boards and their connectors.
Innovation Solution
A camera module design featuring a housing with spaced-apart printed circuit boards, an electromagnetic-field shield, and coupling bosses that maintain a constant distance between the boards, along with connectors for electrical connection, to prevent damage and malfunction from external shocks and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple printed circuit boards are mounted in a camera module for automobile applications, then the functionality and recognition capability are improved, but the risk of positional deviation and damage due to external shocks and vibrations increases
Solution Approach 1:
The camera module is divided into separate functional boards (lens board, FPC board, circuit board) that are spaced apart from each other. This segmentation allows each board to be independently mounted and secured, reducing the risk of mutual interference and damage while maintaining overall functionality.
Solution Approach 2:
A housing structure acts as an intermediary between the multiple boards, providing a rigid framework that maintains predetermined spacing and prevents positional deviation. The housing serves as a mediator that isolates each board from direct mechanical stress while maintaining their relative positions.
2Reliability
If printed circuit boards are spaced apart to prevent interference, then the reliability is improved, but the structural complexity increases
Solution Approach 1:
Multiple functional boards are combined within a single housing structure that provides both spacing and protection. The housing integrates the spacing function, protection function, and mounting function into one unified structure, reducing overall structural complexity while maintaining reliability.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it maintains predetermined spacing between boards, provides mechanical protection against shocks and vibrations, and serves as the mounting structure for securing each board. This multi-functionality reduces the need for additional separate components.
3Adaptability or versatility
If connectors are used to electrically connect the printed circuit boards, then the electrical connectivity is improved, but the risk of connector damage from external shocks and vibrations increases
Solution Approach 1:
The housing structure is designed to absorb and cushion external shocks and vibrations before they reach the connectors. By providing this protective cushioning in advance, the connectors are shielded from direct mechanical stress that would cause damage.
Solution Approach 2:
The housing acts as an intermediary between the external environment and the connectors, isolating the connectors from direct exposure to shocks and vibrations. This mediator structure protects the electrical connections while maintaining their functionality.
Data Source
AI summary
An embodiment of a camera module comprises: a lens part; a housing for coupling the lens part; a plurality of substrates which are disposed at an interval from each other inside the housing; and an electromagnetic field shielding part, disposed inside the housing, for preventing the occurrence of external leakage of electromagnetic field from each of the substrates, wherein the electromagnetic field shielding part may comprise a coupling means for coupling the plurality of substrates at an interval from each other in the optical axial direction of the lens part.