Flexible PCB Shielding Layout for Sliding Electronic Devices
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Solution Overview
Problem
Flexible printed circuit boards in electronic devices are prone to damage due to deformation during state changes, such as sliding or folding, which can lead to signal interference and damage to the circuitry.
Innovation Solution
The electronic device incorporates a foldable structure for flexible printed circuit boards with rigid and flexible regions, allowing them to deform without damage, and includes a shielding mechanism to prevent signal interference between adjacent flexible regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible printed circuit boards are used to connect support members that slide relative to each other, then the device can achieve portability and flexibility, but the flexible printed circuit boards are prone to damage due to deformation during state changes
Solution Approach 1:
The flexible printed circuit board is divided into multiple regions with different properties: a first flexible region that deforms during sliding, a second flexible region that provides additional deformation capacity, and a rigid region that maintains structural integrity. This segmentation allows each region to perform its specific function, resolving the contradiction between flexibility and damage resistance.
Solution Approach 2:
The flexible printed circuit board employs a composite structure combining flexible regions and rigid regions within a single component. This composite design enables the board to simultaneously exhibit flexibility for deformation during sliding and rigidity for maintaining structural integrity, thereby preventing damage while preserving adaptability.
2Adaptability or versatility
If flexible printed circuit boards deform during sliding motion, then the device can change states, but signal interference and damage to the circuitry occur
Solution Approach 1:
The flexible printed circuit board is segmented into distinct functional regions including flexible regions for deformation and a rigid region for stable signal transmission. This segmentation isolates the signal transmission paths from the deformation zones, reducing signal interference while maintaining state change capability.
Solution Approach 2:
Different regions of the flexible printed circuit board are designed with different local qualities: flexible regions with high deformability and a rigid region with high structural stability. This local quality differentiation ensures that signal transmission occurs through stable regions while deformation is accommodated in designated flexible zones, minimizing signal interference.
Data Source
AI summary
The electronic device according to an embodiment include a first support member, a second support member slidably coupled to the first support member in a first direction, a first printed circuit board connected to an antenna module disposed on the first support member, a second printed circuit board disposed on the second support member, a first flexible printed circuit board electrically connecting the first printed circuit board and the second printed circuit board; and a second flexible printed circuit board, and the first flexible printed circuit board includes a conductive layer distinct from a signal line, is spaced apart from the second flexible printed circuit board, and overlaps the second flexible printed circuit board when the second support member is viewed in a direction perpendicular to a direction in which the display faces. Various other embodiments are possible.