Coil Module Spatial Integration for Wireless Power and Communication
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Solution Overview
Problem
Mobile terminals require a compact coil module that integrates multiple coils for wireless charging and communications, necessitating increased spatial efficiency to maintain a portable size while supporting various wireless standards and functionalities.
Innovation Solution
A coil module design featuring a substrate with a wireless charging coil and multiple wireless communications coils, where the coils are positioned on opposite surfaces of the substrate with vias connecting them, allowing for efficient spatial use and overlapping regions to form a magnetic field with a closed loop shape, enabling simultaneous wireless power transfer and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple coils are mounted in one mobile terminal to support various wireless functions, then the functionality and versatility are improved, but the device size and spatial complexity increase
Solution Approach 1:
The patent implements nesting by placing communication coils inside the winding spaces of the charging coil, and positioning multiple coil structures within each other's spatial envelopes. The first and second communication coils are nested within the charging coil's magnetic field region, achieving compact integration of multiple wireless functions in a hierarchical arrangement that maximizes spatial efficiency.
Solution Approach 2:
The patent transitions from planar coil arrangements to three-dimensional spatial integration by forming coils on both the front and back surfaces of a substrate. The charging coil extends through multiple layers with vias connecting opposite surfaces, while communication coils are positioned at different depths and orientations, utilizing vertical and lateral dimensions simultaneously to pack multiple functions into a compact volume.
2Volume of moving object
If coils are positioned close together to increase spatial efficiency, then the volume usage is improved, but electromagnetic interference between coils increases
Solution Approach 1:
The patent applies local quality by assigning different functional characteristics to different spatial regions. The charging coil uses large-radius windings optimized for power transfer, while communication coils use small-radius windings optimized for signal integrity. Different coil sections have different winding densities, turn counts, and geometries tailored to their specific functional requirements, allowing close proximity without mutual interference.
Solution Approach 2:
The patent segments the electromagnetic field space by creating distinct magnetic field regions for charging and communication functions. The charging coil generates a broad magnetic field for power transfer, while communication coils generate localized magnetic fields for data transmission. Physical segmentation is achieved through separate winding regions and directional orientation, while functional segmentation is achieved through frequency separation and selective activation of different coil sets.
3Volume of moving object
If coils are formed on both surfaces of the substrate to maximize space utilization, then the spatial efficiency is improved, but the manufacturing complexity increases
Solution Approach 1:
The substrate serves multiple functions simultaneously: it provides mechanical support for all coils, acts as an electrical interconnection layer through vias, provides magnetic shielding, and enables thermal management. The dual-surface coil formation utilizes the substrate as a shared platform that simplifies overall device architecture despite the increased coil integration density.
Solution Approach 2:
The patent merges the charging coil and communication coils into a single integrated coil module assembly. Both coil types share common substrate real estate, common via structures for electrical connection, and common packaging infrastructure. The merging of multiple coil functions into one modular unit reduces overall device complexity compared to separate discrete coil assemblies.
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 design enhances spatial efficiency, supports multiple wireless standards, and facilitates both wireless charging and communication functions within a compact form factor, ensuring seamless power transfer and data transmission.
Implementation Method 1
a wireless charging coil formed in a substantially central portion of the substrate through both surfaces of the substrate
Implementation Method 2
The second wireless communications coil may form a first magnetic field, and at least a portion of a plurality of magnetic lines of force representing the first magnetic field have a closed loop shape that passes through the center of the first coil part and the center of the second coil part
Data Source
AI summary
A coil module includes a substrate; a wireless charging coil formed in a substantially central portion of the substrate positioned on both surfaces of the substrate; and a first wireless communications coil which does not directly contact the wireless charging coil and is formed in the substantially central portion of the substrate on both surfaces of the substrate, wherein, in a region of the substrate in which the wireless charging coil and the first wireless communications coil are overlapped with each other, the wireless charging coil is formed on one surface of the region and the first wireless communications coil is formed on the other surface of the region, respectively.