Wireless Charging Handoff Between In-Band and Out-of-Band Links
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Solution Overview
Problem
In wireless charging, in-band communication signals often interfere with power signals, reducing the reliability and efficiency of the charging process, necessitating a method to switch to out-band communication without compromising recognition between devices.
Innovation Solution
An electronic device equipped with both first and second communication circuits operating in different frequency bands, allowing for mutual recognition and switching to out-band communication to avoid interference, enabling reliable wireless charging by using a control circuit to manage the communication switch and data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-band communication is used for device recognition during wireless charging, then device recognition and communication are achieved, but power signal interference occurs and charging reliability decreases
Solution Approach 1:
The patent divides the communication process into two distinct stages: device recognition phase using in-band communication, and power transfer phase using out-of-band communication. This segmentation allows each communication mode to be optimized for its specific purpose, eliminating interference between communication signals and power signals during the critical power transfer stage.
Solution Approach 2:
The patent implements dynamic switching between communication bands based on the operational phase. The system transitions from in-band communication during device recognition to out-of-band communication during power transfer, adapting the communication method to the current operational requirements and avoiding signal interference.
2Reliability
If out-of-band communication is used to avoid power signal interference, then charging reliability improves, but device recognition and connection establishment become more complex
Solution Approach 1:
The patent performs device recognition and connection establishment using in-band communication before switching to out-of-band communication for power transfer. This preliminary action completes the complex recognition process when in-band communication is still viable, simplifying the subsequent power transfer phase.
Solution Approach 2:
The patent uses in-band communication as an intermediary mechanism to establish device recognition and connection before transitioning to out-of-band communication. This intermediary step facilitates the handoff between communication modes and simplifies the overall process by handling the complex recognition phase separately.
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 improves the reliability of wireless charging by switching to a communication scheme that does not interfere with power signals, ensuring effective power transfer and device recognition.
Implementation Method 1
An electronic device may support a wireless charging function based on a magnetic induction scheme
Implementation Method 2
a first communication circuit configured to support first communication in a first frequency band
Implementation Method 3
a second communication circuit configured to support second communication in a second frequency band different from the first frequency band
Data Source
AI summary
Disclosed is an electronic device comprising a power reception coil, a first communication circuit supporting first communication in a first frequency band, a second communication circuit supporting second communication in a second frequency band, and a control circuit, wherein the control circuit is configured to: receive a first signal including a first identification information from an external electronic device using the first communication; detect a second signal of the external electronic device including a second identification information using the second communication; when the first and second identification information match, transmit a third signal to the external electronic device using the first communication, the third signal requests a connection to the external electronic device; connect to the external electronic device via the second communication in a response to the request; and transmit or receive data used to receive power to and from the external electronic device using the second communication.