Wireless Power Control Using NFC Tag Pre-Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless power transmission systems face issues with NFC tag damage due to high-output-power transmission, necessitating appropriate processes when an NFC tag is detected to prevent damage.

Innovation Solution

A power transmission device equipped with a detection unit for NFC tags, a negotiation unit for power reception devices, and a determination unit to manage power information based on NFC tag data, allowing for appropriate power transmission processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high-output-power transmission is performed, then power transmission efficiency is improved, but NFC tag damage occurs

Engineering Contradiction:

Improvepower transmission efficiencyVSAvoidNFC tag damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs NFC tag detection before initiating high-output-power transmission. By detecting the presence of NFC tags in advance and storing their information, the system can prevent damage by avoiding high-power transmission when NFC tags are detected, thus resolving the contradiction between maintaining high power transmission efficiency and preventing NFC tag damage.

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If NFC tag detection is performed, then NFC tag damage is prevented, but power transmission time increases

Engineering Contradiction:

ImproveNFC tag damage preventionVSAvoidpower transmission time

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

NFC tag detection is performed in advance and stored for future reference. This preliminary detection avoids the need to repeatedly detect NFC tags during each power transmission session, thereby preventing NFC tag damage while minimizing the time loss associated with detection.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system stores NFC tag information after initial detection, creating a record that can be reused for subsequent power transmission operations. This copying of detection results eliminates the need for repeated detection processes, reducing time loss while maintaining NFC tag protection.

Inventive Principle:

Principle #26Copying

3Object-affected harmful factors

If continuous NFC tag detection is performed, then NFC tag damage is prevented, but system complexity increases

Engineering Contradiction:

ImproveNFC tag damage preventionVSAvoidsystem complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The system performs NFC tag detection once in advance and stores the results, avoiding the need for continuous detection. This approach prevents NFC tag damage while significantly reducing system complexity compared to continuous detection schemes.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By storing NFC tag information after initial detection, the system creates a reusable record that simplifies subsequent operations. This copying mechanism eliminates the need for complex continuous detection systems while maintaining effective NFC tag protection.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20260025028A1Power transmission device, power reception device, method executed by power transmission device, and storage medium

Publication Date: 2026.01.22 CANON KK

AI summary

A power transmission device comprising a detection unit configured to perform detection of a Near Field Communication (NFC) tag, a negotiation unit configured to negotiate with a power reception device and a determination unit configured to determine power information representing power that is negotiable on the basis of predetermined information acquired from the NFC tag.