Wireless Power Reception Control for NFC Tag Protection
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Solution Overview
Problem
Existing wireless power transmission systems do not adequately address the need for appropriate processing when an NFC tag is detected, potentially leading to damage due to high-output power transmission.
Innovation Solution
A power reception device equipped with NFC detection means, negotiation means, and transmission means to determine and transmit power information based on NFC tag characteristics, allowing for safe and efficient power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power transmission is performed with high output power, then power transmission efficiency is improved, but NFC tag damage occurs
Solution Approach 1:
The system performs NFC tag detection before initiating high-power transmission. By detecting the presence of NFC tags in advance and notifying the power transmission device, the system can prevent high-power transmission that would damage the NFC tag, thus resolving the contradiction between power transmission efficiency and NFC tag safety.
Solution Approach 2:
The power reception device provides feedback to the power transmission device about detected NFC tags. This feedback mechanism allows the power transmission device to adjust its transmission power accordingly, preventing NFC tag damage while maintaining efficient power transmission when no NFC tag is present.
2Object-affected harmful factors
If NFC tag detection is performed, then NFC tag safety is improved, but additional processing complexity is required
Solution Approach 1:
The power reception device autonomously performs NFC tag detection and makes decisions about whether to notify the power transmission device. This self-service approach simplifies the overall system architecture by eliminating the need for complex coordination protocols, as the power reception device independently handles the detection and notification process.
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 safe and efficient power transmission by determining and adjusting power levels based on NFC tag capabilities, preventing damage and ensuring a safer wireless power transmission system.
Implementation Method 1
a detection means configured to perform detection of a Near Field Communication (NFC) tag
Implementation Method 2
The technology of wireless power transmission systems generally complies with a standard established by a standardization organization, Wireless Power Consortium (WPC)
Data Source
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AI summary
A power reception device 101 is a device receiving power wirelessly transmitted from a power transmission device 102. The power reception device 101 performs detection of an NFC tag 103 (S406) and negotiates with a power transmission device. If the NFC tag is detected, the power reception device determines power information representing power requested to the power transmission device in the foregoing negotiation on the basis of predetermined information acquired from the NFC tag (S412), and transmits the power information to the power transmission device (S413).