Wireless Charger Docking With Feedback-Based Amplitude Switching
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Solution Overview
Problem
Wireless charging techniques for electronic devices exhibit lower power transmission performance, slower data transfer, and other shortcomings compared to wired charging and data transfer methods.
Innovation Solution
A wireless charging system that uses a transmission coil to induce an electrical current in an accessory device by varying the transmission energy amplitude, with a method to adjust the transmission amplitude if no response is received, ensuring effective communication and charging by reducing magnetic saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless charging uses high transmission amplitude to improve power transmission performance, then charging speed improves, but magnetic saturation occurs causing communication failure
Solution Approach 1:
The system dynamically adjusts the transmission amplitude based on communication feedback. The wireless charging device transmits test signals at different amplitudes and modifies the transmission power in real-time based on whether acknowledgment signals are received from the accessory device, transforming a static high-power transmission into a dynamic adaptive process.
Solution Approach 2:
The system changes the transmission amplitude parameter to resolve the contradiction. By varying the transmission power level based on communication success or failure, the system adapts the physical parameter of transmission amplitude to maintain both efficient charging and reliable communication.
2Productivity
If wireless charging uses high transmission amplitude to improve charging performance, then charging efficiency improves, but data transmission reliability deteriorates
Solution Approach 1:
The system implements a feedback mechanism where the accessory device sends acknowledgment signals in response to test transmissions. The wireless charging device uses this feedback to determine whether to continue or adjust transmission amplitude, ensuring data transmission reliability while maintaining charging efficiency.
Solution Approach 2:
The transmission amplitude is made dynamic rather than static. The system continuously monitors communication feedback and adjusts the transmission power level accordingly, allowing high power when communication is reliable and reducing power when communication failures occur.
3Loss of time
If wireless charging transmits at high power to reduce charging time, then productivity improves, but communication between devices fails
Solution Approach 1:
The system performs preliminary communication tests before initiating full-power charging. By transmitting test signals at predetermined amplitudes and verifying communication success in advance, the system ensures that subsequent high-power transmission will not cause communication failures, thus reducing charging time without sacrificing reliability.
Solution Approach 2:
The system takes preliminary action to prevent communication failure before it occurs. By testing transmission at different amplitudes and identifying the optimal power level that maintains communication reliability, the system preemptively avoids the harmful effect of communication breakdown during high-power charging.
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 wireless charging performance by adapting transmission amplitudes to prevent saturation, ensuring reliable communication and charging of accessory devices, thereby improving power transmission and data transfer efficiency.
Implementation Method 1
The magnetic field of the dock can magnetically couple the transmission coil to a receiving coil of the accessory device to induce an electric current in the receiving coil of the accessory device
Implementation Method 2
The magnetic field of the dock can magnetically couple the transmission coil to a receiving coil of the accessory device
Data Source
AI summary
A method of adapting the charging of an accessory device includes transmitting a first transmission signal at a first transmission amplitude, measuring a receiving load of the first transmission signal, and if the charging device does not receive a response signal to the first transmission signal, transmitting a second transmission signal at a second transmission amplitude that is different from the first transmission amplitude.