Wireless Power Receiver Controller with Magnetic Detection

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Solution Overview

Problem

Existing contactless power transmission systems require user intervention to turn off power supply when devices are housed, imposing a burden and lacking synchronization control for multiple devices, and do not efficiently manage power consumption.

Innovation Solution

A control device that uses magnetic detection signals to automatically control power supply operations, including starting and stopping power supply based on device removal or landing, and includes a power control signal terminal to manage power to magnetic detection elements, reducing user burden and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If automatic power supply control is implemented upon device removal, then power consumption is reduced, but user burden increases due to manual switch operation requirements

Engineering Contradiction:

Improvepower consumptionVSAvoiduser burden

Core Design Contradiction:

Loss of energyVSEase of operation

Solution Approach 1:

The system performs self-service by automatically detecting device removal and controlling power supply without requiring user intervention. The control device monitors the connection state and autonomously stops power supply when the electronic apparatus is removed from the charger, eliminating the need for manual switch operation while reducing power consumption.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from connection state detection to control power supply. When the connection state changes from connected to removed, the control device receives this feedback and automatically adjusts power supply accordingly, creating a closed-loop control system that reduces energy loss without increasing user burden.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If power supply is automatically started upon device removal, then ease of operation is improved, but power consumption increases due to unnecessary discharging

Engineering Contradiction:

Improveautomatic power controlVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The system provides intelligent self-service by automatically detecting both connection state changes and usage requirements. It starts power supply when device is removed and stops when device is reconnected, adapting to actual usage scenarios to avoid unnecessary energy consumption while maintaining ease of operation.

Inventive Principle:

Principle #25Self-service

3Reliability

If magnetic detection elements are continuously powered, then detection reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedetection reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The magnetic detection element operates using periodic action rather than continuous operation. Power is supplied to the magnetic detection element only when needed for detection, such as when connection state changes occur, rather than maintaining continuous power supply. This periodic operation maintains detection reliability while significantly reducing overall power consumption.

Inventive Principle:

Principle #19Periodic action

4Adaptability or versatility

If multiple devices are operated independently, then device versatility is improved, but power management complexity increases

Engineering Contradiction:

Improvedevice operation independenceVSAvoidpower management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system merges power management control for multiple devices through a single centralized control device. The control device manages power supply to multiple electronic apparatuses simultaneously based on their connection states, eliminating the need for separate power management systems for each device and reducing overall system complexity while maintaining device independence.

Inventive Principle:

Principle #5Merging (Combining)

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

The solution enables user-friendly, automatic power management that reduces power consumption and prevents battery damage by synchronizing power supply operations across devices, eliminating the need for user intervention and optimizing power usage.

Implementation Method 1

contactless power transmission (non-contact power transmission) in which electromagnetic induction is used to make power transmission possible without contact between metal parts

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a magnetic detection signal from a magnetic detection element becomes active

Methodology Applied

Scientific EffectMagnetic detection: Magnetic Field

Data Source

PatentUS10418854B2Control device, power receiving device, and electronic apparatus

Publication Date: 2019.09.17 SEIKO EPSON CORP

AI summary

A control device for a power receiving device that receives power supplied from a power transmitting device by contactless power transmission, including a charger that charges a battery based on the received power, a discharger that performs discharging operation of the battery and power supply operation in which power from the battery is supplied to a power supply target, and a controller that controls the discharger, and the controller stops the power supply operation when a magnetic detection signal from a magnetic detection element becomes active.