Coupling Interface for Wireless Charging with Anti-Inversion Detection
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Solution Overview
Problem
Existing technologies face challenges in establishing reliable electrical connections on planar recharging surfaces, often leading to short circuits and energy wastage due to conductive articles, which complicates the charging of portable devices with varying voltage requirements.
Innovation Solution
A coupling interface that controls multiple conductive regions, switching between different polarities to detect and establish persistent electrical connections only when a specific electrical property difference is detected, avoiding spurious connections and ensuring safe charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a planar recharging surface with multiple contact zones is used to enable arbitrary device dispositions, then ease of operation is improved, but the risk of short circuits and energy wastage increases due to conductive articles
Solution Approach 1:
The system applies preliminary testing with alternating polarities before establishing a charging connection. By testing with both positive and negative polarities and detecting characteristic electrical property differences, the system proactively identifies and prevents short circuits caused by conductive articles, ensuring safe charging before power is supplied
Solution Approach 2:
The system continuously monitors electrical properties during the testing phase and uses this feedback to determine whether to proceed with charging. The controller adjusts its behavior based on the detected electrical characteristics, maintaining safety while enabling convenient charging
2Difficulty of detecting and measuring
If conventional testing methods are used to detect device presence, then measurement simplicity is improved, but reliability deteriorates due to false positives from conductive articles
Solution Approach 1:
The system changes the polarity parameter during testing, applying both positive and negative potentials to the contact zones. By measuring electrical properties under different polarity conditions and looking for characteristic differences, the system reliably distinguishes between legitimate devices and conductive articles, eliminating false positives while maintaining measurement simplicity
3Productivity
If power is supplied to all detected conductive zones, then productivity is improved, but energy wastage increases due to charging conductive articles
Solution Approach 1:
The system performs preliminary polarity-based detection before supplying power, identifying and blocking conductive articles that would cause energy wastage. This preliminary action ensures that power is only supplied to legitimate devices with appropriate electrical characteristics, preventing energy loss while maintaining high charging productivity for valid devices
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 effectively identifies electrical devices, avoids short circuits, reduces energy consumption, and enables efficient, plug-free charging and power supply for devices by distinguishing between devices and spurious conductive articles.
Implementation Method 1
a characteristic of an electrical property between the first conductive region and the second conductive region in a first state is determined fall to within a predetermined range and to differ in the presence of a potential difference of a first polarity coupled across the first conductive region and the second conductive region
Data Source
AI summary
A charging surface comprising multiple conductive regions can be used to charge an electronic device placed on it the surface so that electrodes on the device engage respective conductive regions of the surface. In order to distinguish such chargeable devices from short circuits and other spurious connections, the devices are required to demonstrate an anti-inversion characteristic, for example implemented with a MOSFET, across at least a pair of these electrodes. The surface can then be controlled so as to establish a text voltage across each pair of conductive regions in sequence, and look for pairs of conductive regions behaving as being coupled by such an anti inverter circuit. Relationships between every pair of conductive regions can be determined and recording, and the voltage level supplied to each conductive region set accordingly. The coupling interface may furthermore operate to identify device classes, and to set supply voltages or establish additional connections on the basis of stored device class information.