Wireless Power and NFC Communication Interference Control
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Solution Overview
Problem
In communication apparatuses that perform both radio communication and contactless power transmission, electromagnetic induction from the power transmission circuit can interfere with radio communication, leading to degraded communication quality and potential damage to NFC communication components due to excessive power transmission.
Innovation Solution
A communication apparatus that acquires information on the state of the radio communication circuit in a partner apparatus and controls the power supply to determine the appropriate amount of power to be transmitted per unit time, allowing for time-division operation between communication and power transmission to prevent interference and excessive power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If contactless power transmission is performed using electromagnetic induction, then power transmission capability is improved, but electromagnetic interference with radio communication circuit increases
Solution Approach 1:
The patent divides the operating frequency spectrum into multiple segments, with the power transmission circuit operating at a first frequency and the radio communication circuit operating at a second frequency. This frequency segmentation allows both circuits to operate simultaneously without significant electromagnetic interference, resolving the contradiction between power transmission capability and communication quality.
Solution Approach 2:
The patent changes the operating parameters of the circuits by assigning different frequency characteristics. The power transmission circuit uses a first frequency while the radio communication circuit uses a second frequency, creating parameter differentiation that reduces electromagnetic coupling and interference between the two functions.
2Productivity
If fast charging is performed with large power transmission, then charging speed is improved, but risk of damage to NFC communication components increases
Solution Approach 1:
The patent implements a feedback mechanism where the control unit monitors the operating state of both power transmission and radio communication circuits. Based on this feedback, the control unit adjusts the power transmission level to prevent excessive electromagnetic induction that could damage NFC components, while still enabling fast charging when conditions are safe.
Solution Approach 2:
The patent employs dynamic control of power transmission levels based on real-time monitoring of communication circuit status. The power transmission is adjusted dynamically - higher when communication quality is good, reduced when interference risk is detected - allowing fast charging capability while protecting components from damage.
3Adaptability or versatility
If communication circuit and power transmission circuit operate independently, then operational flexibility is improved, but electromagnetic induction becomes noise source for radio communication
Solution Approach 1:
The patent merges the control functions of the communication circuit and power transmission circuit into a single control unit. This unified control coordinates both circuits to operate simultaneously with optimized performance, maintaining operational flexibility while preventing electromagnetic interference that would degrade communication quality.
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
This solution effectively prevents overcurrent and damage to NFC communication components by ensuring that power transmission does not interfere with radio communication, maintaining communication quality and ensuring safe charging operations.
Implementation Method 1
contactless power transmission techniques are known that supply power to a wireless communication partner apparatus, using induced electromotive force
Implementation Method 2
NFC (Near Field Communication) techniques are conventionally known as near field radio communication techniques between communication apparatuses using electromagnetic coupling
Data Source
AI summary
A communication apparatus includes communication means for performing radio communication with a partner apparatus, and supply means for wirelessly supplying power to the partner apparatus. The communication apparatus acquires information on a communication circuit for radio communication in the partner apparatus, and controls the supply means so as to determine an amount of power to be supplied per unit time depending on the information.