Wireless Power Receiver Control Using Frequency-Based Command Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing contactless power transmission systems require complex circuits in the power receiving device to analyze data packets, leading to increased size and manufacturing costs.

Innovation Solution

A control device in the power receiving device that specifies commands based on the length of reception periods of signals with different power transmission frequencies or duties, allowing accurate command identification without increasing circuit scale.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If data packets are transmitted using conventional methods with frequency switching, then data can be transmitted from power transmitting device to power receiving device, but the power receiving device requires complex circuits to analyze received signals, increasing device complexity and manufacturing cost

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidcircuit scale of power receiving device

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent extracts the data transmission function from complex packet analysis and implements it through simple frequency detection. Instead of requiring the power receiving device to analyze complex data packets, the system transmits only frequency information, which the power receiving device can detect using simple circuitry. This separates the data transmission capability from complex processing requirements.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the transmission parameter from complex data packets to simple frequency values. By transmitting different frequencies to represent different data states (e.g., charging commands), the system enables data transmission while keeping the power receiving device's circuitry simple. The frequency parameter becomes the carrier of information rather than complex modulated signals.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the power receiving device uses complex signal analysis circuits to specify commands, then command identification accuracy is improved, but manufacturing cost increases substantially

Engineering Contradiction:

Improvecommand specification accuracyVSAvoidmanufacturing cost of power receiving device

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent employs inexpensive frequency detection circuits instead of expensive signal analysis hardware. The system uses simple comparators and frequency counters that can be easily manufactured, rather than complex demodulators and packet analyzers. This substitution of cheap components maintains sufficient functionality while dramatically reducing manufacturing costs.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent replaces complex electronic signal analysis mechanisms with simpler frequency measurement mechanisms. Instead of using sophisticated circuitry to analyze packet structures and modulated signals, the system uses straightforward frequency detection and comparison, substituting mechanical simplicity for electronic complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If data is transmitted using packets requiring analysis, then comprehensive data exchange is achieved, but the scale and cost of the power receiving device circuit increases

Engineering Contradiction:

Improvedata exchange capabilityVSAvoidcircuit scale

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent makes the frequency parameter serve multiple functions: it carries data information, enables command transmission, and provides synchronization reference. By making frequency a multi-functional parameter, the system achieves comprehensive data exchange capability without requiring separate circuits for each function, thus avoiding increased device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 accurate command specification in contactless power transmission systems while maintaining a compact circuit design, reducing manufacturing costs and complexity.

Implementation Method 1

contactless power transmission (wireless power transfer) in which electromagnetic induction is used to make power transmission possible without a metal contact

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250211034A1Control device, power receiving device, electronic apparatus, and power transmission system

Publication Date: 2025.06.26 SEIKO EPSON CORP

AI summary

A control device includes a control portion that controls a power supply portion that supplies power to a load based on received power received by a power receiving portion from a power transmitting device. In the case where the power receiving portion, after receiving a signal having a first frequency and a first duty from the power transmitting device, receives a signal having a second frequency that is different from the first frequency or a signal having a second duty that is different from the first duty, the control portion specifies an issued command based on a length of a reception period of the signal having the second frequency or the signal having the second duty.