Camera Module Terminal Nesting for EMI Shielding
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Solution Overview
Problem
Conventional camera modules are susceptible to electromagnetic interference (EMI) due to exposed terminals, which can lead to short-circuits when an EMI shield is mounted, compromising the auto focusing function.
Innovation Solution
The camera module design positions the terminal inside the module by forming a through hole or groove in the substrate, allowing the terminal to be electrically connected without exposure, and includes an EMI shield to prevent contact and short-circuits, using a conductive material for secure electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal is exposed to outside for electrical connection, then electrical connectivity is achieved, but the terminal becomes susceptible to electromagnetic wave interference and may short-circuit with the EMI shield
Solution Approach 1:
The terminal is inserted into a through-hole formed in the substrate, nesting the terminal within the substrate structure. This positioning places the terminal inside the camera module rather than exposed externally, reducing electromagnetic wave interference while maintaining electrical connectivity through the through-hole passage.
Solution Approach 2:
The through-hole in the substrate serves as an intermediary structure that allows electrical connection between the terminal and external circuitry while physically isolating the terminal from direct exposure to electromagnetic waves. The substrate material acts as a mediator that enables electrical passage while providing electromagnetic shielding.
2Object-affected harmful factors
If an EMI shield is mounted to cover the camera module, then electromagnetic wave interference is reduced, but the terminal and EMI shield may contact and generate short-circuit
Solution Approach 1:
The terminal is nested within the substrate via the through-hole structure, positioning it inside the camera module body. This nested positioning ensures that even when the EMI shield is mounted to cover the module, the terminal remains isolated within the substrate structure and cannot contact the EMI shield, preventing short-circuits while maintaining electromagnetic shielding effectiveness.
3Object-affected harmful factors
If the terminal is positioned inside the module, then electromagnetic wave influence is reduced and short-circuit is prevented, but electrical connection complexity increases
Solution Approach 1:
The substrate is segmented with a through-hole that separates the terminal positioning function from the electromagnetic shielding function. This segmentation allows the terminal to be positioned inside the module for EMI protection while the through-hole provides a straightforward electrical connection path, avoiding excessive complexity by dividing the structural requirements into distinct functional elements.
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 reduces the influence of external electromagnetic waves and prevents short-circuits by keeping the terminal inside the module, ensuring reliable auto focusing and electrical connectivity.
Implementation Method 1
an image sensor converting the optical image to an electrical signal
Data Source
AI summary
Exemplary embodiments of a camera module are proposed, the camera module being such that a terminal formed at a holder is inserted into a through hole or a groove of a substrate in a case the substrate and the holder are coupled, to allow the terminal and the holder to be electrically connected.