Camera Module Holder Conductive Layer EMI Shielding
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Solution Overview
Problem
Portable terminals equipped with camera modules suffer from electromagnetic interference (EMI), radio frequency (RF) noise, and thermal noise, which degrade radio sensitivity.
Innovation Solution
A camera module design featuring a lens part with a conductive layer on a holder and a printed circuit board, where the holder is electrically connected to the printed circuit board to maintain a ground state, effectively blocking EMI and RF noise, and additional conductive layers on sensor and connector parts prevent thermal noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera module is equipped in a portable terminal, then image acquisition function is improved, but electromagnetic interference and RF noise increase which degrades radio sensitivity
Solution Approach 1:
The patent applies local quality by forming a conductive layer specifically on the holder surface that is in contact with or adjacent to the lens part. This localized conductive structure provides electromagnetic shielding exactly where the harmful EMI and RF noise are generated or transmitted, without requiring the entire camera module or portable terminal to be coated with conductive material. The conductive layer is strategically positioned to block noise while maintaining optical functionality.
Solution Approach 2:
The conductive layer on the holder acts as an intermediary element between the lens part and the rest of the camera module. It mediates the electromagnetic interference by providing a shielding barrier that blocks EMI and RF noise from reaching sensitive components, while still allowing the holder to fulfill its mechanical support function. This intermediary conductive layer resolves the conflict between maintaining image acquisition function and reducing harmful electromagnetic factors.
2Object-affected harmful factors
If conductive layer is formed on holder surface, then EMI and RF noise are blocked, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the surface properties of the holder through conductive layer formation. This involves changing the electrical conductivity parameter of the holder surface from non-conductive to conductive, enabling EMI and RF noise blocking. The conductive layer can be applied through various methods such as coating, plating, or conducting paste, which are standard manufacturing techniques that can be integrated into existing production lines without requiring entirely new manufacturing processes.
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
The camera module effectively blocks EMI, RF noise, and thermal noise, preventing communication faults and erroneous operations caused by external electromagnetic waves.
Implementation Method 1
a conductive layer formed on a surface of the holder... effectively blocking the EMI, RF noise
Implementation Method 2
additional conductive layers on sensor and connector parts prevent thermal noise
Data Source
AI summary
A camera module is provided with a lens part including a lens and a lens barrel, a holder coupled with the lens part and formed with a first conductive layer, and a printed circuit board electrically connected to the first conductive layer while supporting the holder.