Camera Module Shielding for Vehicle EMC Noise
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Solution Overview
Problem
Camera modules in vehicles face challenges with Electro Magnetic Compatibility (EMC) due to electromagnetic noise interference, which degrades performance and image quality, and affects the functionality of both the camera module and surrounding electronic devices.
Innovation Solution
The camera module incorporates a conductive first and second shielding part, arranged adjacent to the cable, to effectively shield electromagnetic noise generated from the substrate or external sources, using conductive materials to connect with the rear body and holder, thereby improving EMC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If camera modules are mounted in vehicles with multiple electronic devices, then the functionality and recognition capability are improved, but electromagnetic noise interference increases and degrades performance
Solution Approach 1:
A shielding part made of conductive material is introduced as an intermediary component between the camera module's substrate and the surrounding environment. This shielding part acts as a mediator that blocks electromagnetic noise from reaching the substrate while allowing the camera module to maintain its full functionality and recognition capability in the vehicle environment
2Reliability
If shielding parts are added to reduce electromagnetic noise, then EMC performance is improved, but device complexity increases
Solution Approach 1:
The shielding part is merged with the camera module's existing structure by integrating it into the rear body assembly. The shielding part is positioned to surround the substrate and is coupled to the rear body, combining the shielding function with the existing structural components rather than adding a completely separate shielding system
Solution Approach 2:
The shielding part is strategically positioned only in the region where electromagnetic noise interference is most severe - around the substrate and cable connections. This localized shielding approach provides effective EMC protection without requiring complete encapsulation of the entire camera module, thereby reducing overall structural complexity
3Adaptability or versatility
If cable connections are made for external devices, then adaptability is improved, but electromagnetic noise propagation through cables increases
Solution Approach 1:
The shielding part serves as an intermediary barrier that surrounds both the substrate and the cable connections. This intermediary structure blocks electromagnetic noise from propagating through the cable connections while maintaining the necessary electrical connectivity for external device integration
Solution Approach 2:
The cable is nested within the shielding part, with the shielding part forming a protective enclosure around the cable. This nested arrangement allows the cable to maintain its electrical connection function while being protected from electromagnetic noise by the surrounding conductive shielding structure
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 shielding parts effectively absorb and redirect electromagnetic noise, enhancing the EMC of the camera module and surrounding electronic devices, thereby improving performance and image quality by reducing electromagnetic interference.
Implementation Method 1
a first shielding part formed of a conductive material and arranged at the rear of the connector part to shield electromagnetic noise generated from the substrate part or the outside
Data Source
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AI summary
An embodiment of a camera module may comprise: a lens part; a front body receiving the lens part; a rear body coupled to the front body; a substrate part received inside the rear body and comprising a plurality of printed circuit boards; a cable electrically connected to the substrate part; a connector part connecting the cable with the substrate part; and a first shielding part, made of a conductive material and disposed at a rear side of the connector part, for shielding electromagnetic noise generated from the substrate part or the outside.