Foldable Device Receiving Coil Asymmetry and Slits
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Solution Overview
Problem
Current foldable electronic devices face challenges in efficiently charging their batteries using wireless charging technology due to the design of their receiving coils and housing structures, which affect the magnetic field interactions and induced current generation.
Innovation Solution
The design incorporates a foldable electronic device with a display that can be in a flat or folded state, featuring housing structures with strategically placed receiving coils and slits in the magnetic field areas to optimize magnetic field interactions and improve charging efficiency, including specific slit configurations that enhance the alignment and polarity of magnetic fields for better power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the receiving coil is disposed at the edge of the housing structure, then wireless charging efficiency is improved through optimized magnetic field alignment, but the device complexity increases due to asymmetric component placement
Solution Approach 1:
The receiving coil is asymmetrically positioned at the edge of the first housing structure rather than at the center, creating an asymmetric layout that optimizes magnetic field alignment with external charging devices. This asymmetric placement improves wireless charging efficiency while the housing structure is designed to accommodate this asymmetry through integrated magnetic field areas and slit configurations.
Solution Approach 2:
The housing structure incorporates localized magnetic field areas with specific slit patterns at the edge where the receiving coil is positioned. These local structural features are optimized to enhance magnetic field penetration and alignment specifically at the coil location, improving charging efficiency without requiring complex modifications throughout the entire device structure.
2Power
If slits are formed in the magnetic field area adjacent to the receiving coil, then induced current generation is enhanced through improved magnetic field penetration, but the structural strength of the housing is reduced
Solution Approach 1:
Slits are formed only in specific magnetic field areas adjacent to the receiving coil rather than throughout the entire housing structure. These localized slits are strategically positioned to maximize magnetic field penetration where needed while preserving the structural integrity of other housing regions. The slits are confined to non-critical structural zones.
Solution Approach 2:
The housing structure is segmented into different functional zones: areas with slits for magnetic field penetration and areas without slits for structural support. This segmentation allows the housing to simultaneously provide both magnetic field access for the receiving coil and adequate mechanical strength for device protection.
3Stability of the object's composition
If the display areas are configured to face the same direction in flat state, then screen connectivity is improved, but the adaptability to different folding configurations is limited
Solution Approach 1:
The display structure is designed to dynamically adapt its configuration based on the folding state. In the flat state, both display areas face the same direction to provide a connected screen experience. When folded, the display can reconfigure to face different directions, allowing the same physical structure to support multiple usage scenarios and folding configurations.
Solution Approach 2:
The display system is designed to serve multiple functions: it provides a connected dual-display experience in flat configuration while also supporting folded configurations where displays face different directions. This multi-functional design allows the device to adapt to various user needs and usage scenarios without requiring separate display systems for each mode.
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 enhances the efficiency of wireless charging by optimizing the alignment and polarity of magnetic fields, leading to improved induced current generation and battery charging performance across different device states.
Implementation Method 1
The magnetic field may generate an induced current in the receiving coil and charge the battery of the electronic device.
Data Source
AI summary
A foldable electronic device is provided, which includes a display having a first display area and a second display area that are arranged in a same direction when the foldable electronic device is in a flat state. The foldable electronic device further includes a first housing structure that surrounds at least part of the first display area, a second housing structure that is connected to the first housing structure and that surrounds at least part of the second display area, and a first receiving coil disposed in a first magnetic field area at an edge of the first housing structure.