Dual Mode Wireless Power Receiver Circuitry for Secure Transactions
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Solution Overview
Problem
Current mobile devices require separate power adapters and NFC circuitry, making them cumbersome and costly, especially for mid and lower-tier markets, as they lack a dual-mode wireless charging solution that can both charge and transmit power securely for various transactions.
Innovation Solution
A dual-mode wireless power receiver with integrated impedance and switch networks, security engine, and control logic circuitry that can switch between charging and communication modes, enabling power transmission and secure transactions by authenticating and encrypting data transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power adapters and NFC circuitry are used for wireless charging and communication, then reliable secure transactions can be achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the wireless power receiver circuitry and NFC antenna circuitry into a single integrated module. The wireless power receiver includes a coil, capacitor, and rectifier that can operate in two modes: receiving power when connected to a wireless charger, and transmitting power to the secondary device for NFC-like transactions. This merging eliminates the need for separate power adapters and NFC circuitry while maintaining security through hardware-built-in authentication and encryption capabilities.
Solution Approach 2:
The wireless power receiver circuitry is designed to perform multiple functions: it can receive wireless power for charging the mobile device, and it can also transform into a wireless transmitter to power and communicate with secondary devices for transactions. The same hardware components (coil, capacitor, rectifier, impedance matching circuitry) are used for both power reception and power transmission, making the device universal and eliminating the need for dedicated separate components.
2Device complexity
If wireless power receiver circuitry is integrated with NFC functionality, then cost and space are reduced, but the ability to perform secure authenticated transactions may be compromised
Solution Approach 1:
The patent integrates NFC functionality into the wireless power receiver circuitry by using the same hardware components (coil, capacitor, rectifier, impedance matching network) for both power reception and power transmission/communication. The control logic circuit manages the switching between these modes and implements security protocols for authenticated transactions, ensuring that security is not compromised despite the integration.
Solution Approach 2:
The wireless power receiver circuitry includes built-in security features such as authentication and encryption capabilities that are hardware-integrated rather than software-dependent. The control logic circuit performs authentication with the primary wireless charger and with secondary devices, and the system can independently manage secure transactions without requiring external security modules, making the integrated design self-sufficient and secure.
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
This solution allows for a single device to both charge and securely transmit power, reducing the need for multiple adapters and NFC circuitry, enhancing convenience and security while lowering costs by integrating functionality into a single module.
Implementation Method 1
A mobile device can receive power wirelessly via the wireless power receiver circuitry
Implementation Method 2
The switch network is configured as an inverter or a rectifier depending upon the mode of operation of the dual mode wireless power receiver. In the communication mode, the switch network is configured as an inverter to convert direct current to alternating current (dc-to-ac)
Implementation Method 3
The first circuitry comprises an impedance network, a switch network, a filter capacitor, and one or more switches
Data Source
AI summary
A dual mode wireless power receiver (DMWPR) selectively applying a received power to a load device and utilizing at least a part of the power to power-up, communicate, and charge a secondary wireless power receiver (SWPR) is provided. The DMWPR includes a first circuitry having an impedance network, a switch network, a filter capacitor, and one or more switches, and a second circuitry having a security engine, a control logic circuit, and a modulator/demodulator circuit. The first circuitry receives power in charging mode and transmits power in communication mode. The second circuitry configures the first circuitry to allow receipt and transmittal of power, receives and interprets data from SWPR in identified wireless power protocol, and based on the type of SWPR authenticates, decrypts and encrypts data transfer between DMWPR and SWPR, and receives and executes on a request from SWPR to perform a function associated with transmitted power.