Wireless Charging and Communications Device Using Frequency Segmentation

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Solution Overview

Problem

Wireless wearable devices face challenges in efficiently charging batteries at 10.6 MHz frequencies due to legal restrictions on magnetic field strength, resulting in long charging times, while operating at this frequency minimizes interference with communications.

Innovation Solution

A combination wireless charging and communications device using a series reactance for charging current and a parallel reactance for communications voltage, operating at different frequencies (13.6 MHz for charging and 10.6 MHz for communications), with a switch to alternate between modes, and an antenna responsive to magnetic, electric, or electromagnetic fields.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If wireless charging operates at 10.6 MHz to minimize interference with communications, then communication interference is reduced, but charging time increases due to legal restrictions on magnetic field strength

Engineering Contradiction:
Improvecommunication interferenceVSAvoidcharging time
Core Design Contradiction:
Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The patent divides the single antenna system into two separate resonant circuits: one tuned to 10.6 MHz for communication and another tuned to 13.6 MHz for charging. This segmentation allows each function to operate at its optimal frequency independently, resolving the contradiction between minimizing communication interference and reducing charging time.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent changes the operating frequency parameter from a single 10.6 MHz frequency to two distinct frequencies: 10.6 MHz for communication and 13.6 MHz for charging. By adjusting the resonant frequency of the charging circuit to 13.6 MHz, the system achieves faster charging while the communication circuit continues to operate at 10.6 MHz without interference.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If wireless charging operates at 13.6 MHz for efficient charging, then charging speed improves, but interference with communications at 10.6 MHz increases

Engineering Contradiction:
Improvecharging speedVSAvoidcommunication interference
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the antenna system into two independently tuned resonant circuits, allowing the charging circuit to operate at 13.6 MHz for fast charging while the communication circuit operates at 10.6 MHz. The segmentation isolates the frequency bands, preventing interference between the two functions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic frequency selection through a switch that alternates between charging mode (13.6 MHz) and communication mode (10.6 MHz). The system dynamically adjusts the resonant frequency of the antenna circuit based on the active function, enabling efficient charging without compromising communication quality.

Inventive Principle:
Principle #15Dynamics

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 efficient wireless charging and communication by optimizing charging and communication frequencies, reducing interference and meeting legal emission restrictions, while maintaining efficient energy transfer and communication quality.

Implementation Method 1

the antenna is responsive to at least one of: a magnetic field, an electric field, or an electromagnetic field

Methodology Applied
Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

the antenna is responsive to at least one of: a magnetic field, an electric field, or an electromagnetic field

Methodology Applied
Scientific EffectElectric field: Electric Field

Implementation Method 3

the antenna is responsive to at least one of: a magnetic field, an electric field, or an electromagnetic field

Methodology Applied
Scientific EffectElectromagnetic field: Electromagnetic Induction

Implementation Method 4

the series reactance is configured to conduct a charging current between the antenna and the charging circuit

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 5

the parallel reactance is configured to conduct a communications voltage between the antenna and the communications circuit

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS10277061B1Wireless device
Publication Date: 2019.04.30 NXP BV
  • US10277061B1 patent drawing
  • US10277061B1 patent drawing

AI summary

One example discloses a combination wireless charging and communications device, including: a series reactance; wherein the series reactance is configured to be coupled in series between an antenna and a charging circuit; wherein the series reactance is configured to conduct a charging current between the antenna and the charging circuit; a parallel reactance; wherein the parallel reactance is configured to be coupled in parallel with the antenna and a communications circuit; and wherein the parallel reactance is configured to conduct a communications voltage between the antenna and the communications circuit.