Wireless Power Receiver Amplitude Modulation Under High Signal Strength

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Solution Overview

Problem

In non-contact wireless charging systems, increased strength of the wireless power signal leads to signal distortion, causing communication errors between the wireless power transmitting and receiving apparatuses.

Innovation Solution

A wireless power receiving apparatus that measures the strength of the wireless power signal and modulates its amplitude using a selection of modulators, including capacitors and transistors, to maintain stable communication with the wireless power transmitting apparatus.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the strength of the wireless power signal transmitted from the wireless power transmitting apparatus is increased, then the power transfer efficiency is improved, but signal distortion occurs causing communication errors

Engineering Contradiction:
Improvewireless power signal strengthVSAvoidcommunication reliability
Core Design Contradiction:
PowerVSReliability

Solution Approach 1:

The patent applies dynamics by making the modulation depth adjustable based on wireless power signal strength. The modulation depth is dynamically changed according to the measured power level: using smaller modulation depths at higher power levels and larger modulation depths at lower power levels. This dynamic adjustment prevents signal distortion while maintaining effective communication across varying power conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the modulation depth parameter based on the strength of the wireless power signal. By measuring the power level and selecting appropriate modulation depths from a set of predetermined values, the system adapts the communication parameters to match the current power conditions, thereby preventing distortion at high power levels while ensuring detectability at low power levels.

Inventive Principle:
Principle #35Parameter changes

2Ease of operation

If amplitude modulation is used for communication, then communication capability is enabled, but signal distortion occurs at high power levels

Engineering Contradiction:
Improvecommunication capabilityVSAvoidsignal accuracy
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The system dynamically adjusts the modulation depth based on the measured wireless power signal strength. At higher power levels where distortion is more likely, smaller modulation depths are used to prevent distortion. At lower power levels, larger modulation depths are used to ensure the communication signal remains detectable. This dynamic parameter adjustment maintains both communication capability and signal accuracy across all power levels.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements feedback by measuring the wireless power signal strength and using this information to determine the appropriate modulation depth. The system continuously monitors the power level and adjusts the modulation depth accordingly, creating a closed-loop control system that prevents distortion while maintaining effective communication.

Inventive Principle:
Principle #23Feedback

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

Prevents signal distortion and ensures smooth communication even with varying wireless power signal strengths, enhancing the reliability of wireless power transfer.

Implementation Method 1

a wireless power receiving apparatus receiving wireless power from a wireless power transmitting apparatus

Methodology Applied
Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Data Source

PatentUS12166362B2Wireless power reception device and wireless communication method
Publication Date: 2024.12.10 DOLBY HYBRID TECHNOLOGIES LLC
  • US12166362B2 patent drawing
  • US12166362B2 patent drawing
  • US12166362B2 patent drawing

AI summary

A wireless power reception device and a wireless communication method thereby are provided. The wireless communication method by the wireless power reception device may comprise the steps of: receiving a wireless power signal from a wireless power transmission device; measuring the strength of the wireless power signal; modulating the amplitude of the wireless power signal according to the measured strength of the wireless power signal; and performing communication with the wireless power transmission device by using the signal having the amplitude modulated.