Segmented Wireless Charging Coil for Wearable Terminals
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Solution Overview
Problem
Watch-type mobile terminals face inefficiencies in wireless charging due to the need for precise positioning and the cumbersome process of separating the device from the wrist for charging, which limits convenience and charging efficiency.
Innovation Solution
The integration of wireless charging coils within the watch-type mobile terminal's main body and band, allowing for charging while worn, utilizing both magnetic induction and resonance schemes to enhance charging efficiency and convenience by minimizing electromagnetic interference from the human body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a legacy wireless charging type is used, then wireless charging function is provided, but charging efficiency is low and precise positioning is required
Solution Approach 1:
The wireless charging coil is divided into multiple segments positioned at different locations (side of main body, front side of main body, and band). This segmentation allows the charging function to be distributed across multiple regions, reducing the requirement for precise positioning of a single coil while maintaining or improving charging efficiency through multiple charging zones.
2Reliability
If the watch-type mobile terminal is separated from the wrist for charging, then wireless charging can be performed, but convenience is reduced and the process becomes cumbersome
Solution Approach 1:
The wireless charging capability is segmented across multiple locations including the band area. This allows the watch to be charged while worn on the wrist, as the band-mounted coil can receive power from a corresponding transmitter positioned near the user's wrist, eliminating the need to remove the device for charging.
Solution Approach 2:
The watch-type mobile terminal can charge itself while being worn on the user's wrist. The wireless charging system is designed to work in the worn state, allowing continuous charging during normal use without requiring external intervention or removal from the wrist.
3Reliability
If wireless charging coils are positioned in the main body and band, then charging efficiency is improved, but device complexity increases
Solution Approach 1:
The wireless charging coil structure is designed to serve multiple functions: it provides charging capability in the worn state, maintains charging efficiency, and integrates with the existing watch structure. The same coil configuration supports both magnetic induction and magnetic resonance charging schemes, reducing the need for separate systems for different charging modes.
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
Enables wireless charging of watch-type mobile terminals while worn on the wrist, increasing charging efficiency and allowing for various charging methods, thus addressing the inefficiencies of traditional wireless charging systems.
Implementation Method 1
a wireless charging coil configured to charge the battery by flowing electric current according to a change of a surrounding magnetic field
Implementation Method 2
utilizing both magnetic induction and resonance schemes to enhance charging efficiency
Data Source
AI summary
A watch-type mobile terminal comprises: a main body having a display unit mounted on the front side thereof; a band connected to the main body and wound around a wrist of a user; a battery mounted in the main body; and a wireless charging coil which is positioned in at least one of a side surface and the front surface of the main body and the band and has electric current flow according to a change in a surrounding magnetic field to charge the battery. The watch-type mobile terminal can be charged on the wrist of the user, without the need to be separated from the wrist, and can improve the charging efficiency by minimizing an electromagnetic wave which is influenced by the human body, since the watch-type mobile terminal is at a certain distance away from the wrist.