Wireless Charging Coil and NFC Layout for Accessory Alignment
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Solution Overview
Problem
Existing wireless charging systems lack efficient methods for identifying and communicating with accessories, leading to potential misalignment and suboptimal power transfer, as well as inadequate user feedback on accessory information.
Innovation Solution
Incorporation of near-field communications (NFC) circuitry and magnetic alignment structures in wireless charging systems to align coils and enable communication with accessories, providing user feedback through displays or haptic/audio outputs, and performing NFC operations during power transfer pauses or halts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If wireless charging systems use only power transfer coils without integrated communication components, then the device structure remains simple, but the system cannot efficiently identify accessories or provide user feedback on accessory information
Solution Approach 1:
The patent combines NFC communication components with wireless charging power transfer coils into an integrated structure. The NFC antenna is positioned around the power transfer coil, allowing both communication and power transfer functions to coexist in a single device component arrangement, thereby enabling accessory identification without significantly increasing overall device complexity
Solution Approach 2:
The integrated structure serves multiple functions: the power transfer coil performs wireless power transfer while the surrounding NFC antenna performs accessory identification and communication. This multi-functional design allows a single device to handle both power charging and accessory recognition tasks
2Productivity
If the system performs NFC communication operations simultaneously with wireless power transfer, then communication efficiency improves, but power transfer stability deteriorates due to electromagnetic interference
Solution Approach 1:
The system implements periodic time-division multiplexing where NFC communication operations are scheduled during specific time windows when power transfer is temporarily paused or reduced. This periodic alternation between communication and power transfer modes allows both functions to operate effectively without causing electromagnetic interference that would compromise power transfer stability
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
Enhances coil alignment, facilitates efficient power transfer, and provides users with accurate accessory information through visual, auditory, or tactile feedback, improving the overall user experience and system efficiency.
Implementation Method 1
a magnetic alignment structure configured to align the near-field communications antenna with a corresponding near-field communications antenna in the accessory when the magnetic alignment structure is magnetically coupled to the accessory
Implementation Method 2
The wireless power transmitting device has a coil that produces electromagnetic flux
Implementation Method 3
The wireless power receiving device has a coil and rectifier circuitry that uses electromagnetic flux produced by the transmitter to generate direct-current power
Data Source
AI summary
A wireless power system may include an accessory configured to transfer or relay wireless power to a portable electronic device. The portable electronic device may include wireless charging circuitry and sensors configured to detect compatible accessories currently coupled with the portable electronic device. The portable electronic device performs wireless charging or related functions in accordance with the coupled accessories.