NFC Antenna Switching Between Charging and Device Communication
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Solution Overview
Problem
Current NFC devices and control methods struggle to efficiently implement both charging and communication functions while minimizing manufacturing costs.
Innovation Solution
A method and NFC device configuration where a single NFC controller coupled to an antenna interrupts charging of a second NFC device upon detecting an impedance change, allowing for simultaneous communication with a third NFC device, utilizing an antenna with multiple windings to optimize field detection and charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single NFC controller and antenna are used to perform both charging and communication functions, then manufacturing cost is reduced, but the device cannot efficiently implement both functions simultaneously
Solution Approach 1:
The patent applies dynamics by making the antenna configuration adjustable through switching between different winding connections. The NFC controller can dynamically reconfigure the antenna windings based on the required function (charging or communication), allowing a single antenna structure to adapt to different operational modes and efficiently support both functions without requiring separate dedicated antennas for each function
Solution Approach 2:
The patent implements universality by designing a single NFC controller and antenna system that can perform multiple functions (charging and communication). The antenna windings can be reconfigured to serve different purposes, and the NFC controller is designed to handle both charging operations and communication protocols, eliminating the need for separate dedicated hardware components for each function
2Productivity
If the antenna charging mode operates continuously, then charging efficiency is maintained, but detection of additional NFC devices is impossible
Solution Approach 1:
The patent applies periodic action by implementing intermittent switching between charging mode and detection mode. The NFC controller periodically interrupts the charging operation to perform detection of additional NFC devices by monitoring impedance changes, then resumes charging after detection. This periodic switching allows the system to maintain charging efficiency while periodically checking for other devices that may need attention
3Reliability
If multiple dedicated antennas are used for different NFC functions, then function specialization is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies segmentation by dividing the antenna into multiple independent windings that can be selectively connected. Instead of using multiple complete antennas, the antenna is segmented into separate windings (first winding, second winding, third winding) that can be individually activated or combined based on the required function, reducing overall complexity while maintaining functional specialization
4Device complexity
If a single antenna serves both charging and communication, then component count is reduced, but performance of both functions degrades
Solution Approach 1:
The patent applies dynamics by enabling the single antenna to dynamically reconfigure its electrical characteristics through different winding connections. The NFC controller can adjust the antenna configuration to optimize performance for the current function (charging or communication), ensuring that despite using a single antenna, the performance of both functions remains high through adaptive optimization
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 efficient detection of remote NFC devices during charging without degrading charging or detection efficiency, while reducing component costs compared to existing systems.
Implementation Method 1
a detection, by the NFC controller, of an impedance change of the antenna
Implementation Method 2
a mode of charge of a second remote NFC device by the antenna
Implementation Method 3
a communication, via the antenna, with a third remote NFC device
Data Source
AI summary
The present description concerns a method of controlling a first NFC device comprising an NFC controller coupled to an antenna, wherein a mode of charge of a second remote NFC device by the antenna is interrupted as a result of a detection, by the NFC controller, of an impedance change of the antenna, the interruption being followed by the starting of a communication, via the antenna, with a third remote NFC device.