Dual-Mode Wireless Charging with Near- and Far-Field Power Transfer

Solution Overview

Problem

Existing wireless power transmission systems are limited to either near-field or far-field applications, lacking flexibility and efficiency in both short-range and long-range energy transfer.

Innovation Solution

A wireless power transfer system integrating both near-field and far-field capabilities, utilizing a coupling device with a resonant inductive coil and an antenna unit, fabricated using CMOS technology, allowing seamless integration with other active/passive device elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a near-field wireless power transmission system is used, then power transfer efficiency is improved, but transmission distance is limited

Engineering Contradiction:

Improvepower transfer efficiencyVSAvoidtransmission distance

Core Design Contradiction:

Loss of energyVSLength of moving object

Solution Approach 1:

The receiver is divided into two separate units: a near-field receiver for short-range high-efficiency power transfer and a far-field receiver for long-range power transfer. This segmentation allows the system to optimize for different transmission distances without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The wireless power transmission system is designed to support both near-field and far-field operating modes through a unified transmitter that can communicate with and power either type of receiver. This multi-functionality resolves the contradiction by making the system adaptable to different transmission distance requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Length of moving object

If a far-field wireless power transmission system is used, then transmission distance is extended, but power transfer efficiency deteriorates

Engineering Contradiction:

Improvetransmission distanceVSAvoidpower transfer efficiency

Core Design Contradiction:

Length of moving objectVSLoss of energy

Solution Approach 1:

The receiver is divided into two separate units: a near-field receiver for short-range high-efficiency power transfer and a far-field receiver for long-range power transfer. This segmentation allows the system to optimize for different transmission distances without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically selects between near-field and far-field operating modes based on the distance between transmitter and receiver. The transmitter can adapt its transmission parameters and the receiver can switch between near-field and far-field reception modes to optimize power transfer efficiency at any given distance.

Inventive Principle:

Principle #15Dynamics

3Reliability

If separate near-field and far-field systems are used, then each system is optimized for its specific application, but device complexity increases

Engineering Contradiction:

Improveapplication-specific optimizationVSAvoidsystem configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Both near-field and far-field receiver capabilities are merged into a single integrated receiver unit. The receiver includes both near-field and far-field receiving elements that can operate independently or together, eliminating the need for separate receiver devices while maintaining application-specific optimization.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The wireless power transmission system is designed to support both near-field and far-field operating modes through a unified transmitter that can communicate with and power either type of receiver. This multi-functionality resolves the contradiction by making the system adaptable to different transmission distance requirements.

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 flexible and efficient wireless power transfer over various distances, seamlessly integrating with existing CMOS fabrication steps and supporting both near-field and far-field applications.

Implementation Method 1

The near-field receiver includes a resonant inductive coil that is wired to the battery

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The far-field receiver includes an antenna unit that is wired to the battery

Methodology Applied

Scientific EffectElectromagnetic radiation:

Data Source

PatentUS20250323148A1Dual-mode wireless charging device

Publication Date: 2025.10.16 TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

AI summary

A method of making a semiconductor device, includes: forming a first molding layer on a substrate; forming a first plurality of vias in the first molding layer; forming a first conductive line over the first molding layer, wherein the first conductive line is laterally disposed over the first molding layer and a first end of the conductive line aligns with and is electrically coupled to a first via of the first plurality of vias; forming a second molding layer above the first molding layer; and forming a second plurality of vias in the second molding layer, wherein a second via of the second plurality of vias aligns with and is electrically coupled to a second end of the conductive line, and wherein the second plurality of vias, the conductive line, and the first plurality of vias are electrically coupled to one another.