Wireless Charging Coil Ping Detection for Alignment Confirmation
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Solution Overview
Problem
Wireless charging efficiency is compromised if the distance between the wireless power receiving unit and the transmitting unit exceeds a specific distance or if the receiving unit is not aligned correctly, leading to incomplete battery charging.
Innovation Solution
An electronic device with a conductive coil and a sensor circuit that receives analog ping signals from an external wireless charging unit, counts the number of signals within a specified time, and provides a notification if the count exceeds a threshold, indicating proper alignment and charging status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power receiving unit is positioned at a distance greater than a specific distance or not aligned correctly, then the wireless charging efficiency deteriorates or the battery is not charged, but increasing the transmission power to compensate for distance would increase energy loss and reduce system reliability
Solution Approach 1:
The system performs preliminary alignment detection before initiating full wireless charging by detecting the presence and position of the receiving unit using the conductive coil and sensor circuit. This preliminary action ensures proper positioning is established before charging begins, preventing efficiency deterioration and ensuring reliable charging completion.
Solution Approach 2:
The sensor circuit continuously monitors the wireless charging status and provides feedback signals to the processor. Based on this feedback regarding alignment and charging progress, the system can adjust transmission parameters or notify the user of positioning issues, thereby maintaining charging efficiency and reliability throughout the charging process.
2Ease of operation
If the reception coil contacts the designated position of the transmission coil or approaches within a specific distance, then wireless charging can be performed, but maintaining precise alignment requires complex positioning mechanisms that increase device complexity
Solution Approach 1:
The conductive coil and sensor circuit serve as intermediary detection elements between the transmission coil and the receiving unit. These intermediaries detect the presence and approximate position of the receiving unit without requiring complex mechanical positioning systems, thereby maintaining ease of operation while avoiding increased device complexity.
Solution Approach 2:
The system replaces complex mechanical positioning mechanisms with electromagnetic field-based detection using the conductive coil and sensor circuit. This substitution allows the system to detect alignment and positioning status through electrical signals rather than mechanical sensors, reducing device complexity while maintaining ease of operation.
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 efficiency by providing alignment status information and improving charging efficiency by ensuring correct positioning between the wireless power transmitting and receiving units.
Implementation Method 1
The wireless charging technology may generate electromagnetic induction or electromagnetic resonance between a transmission coil of a wireless power transmitting unit (e.g., a wireless charging pad) and a reception coil of a wireless power receiving unit (e.g., an electronic device)
Data Source
AI summary
Various embodiments of the present invention relate to an apparatus and a method for identifying wireless charging status information in an electronic device. An electronic device may include a housing including a first plate, a second plate facing away from the first plate, and a side surface member for at least partially surrounding a space between the first plate and the second plate, a display positioned in the space and viewed through the first plate, a conductive coil parallel to the second plate and disposed between the display and the second plate, a wireless charging circuit electrically connected to the conductive coil, a sensor circuit electrically connected to the wireless charging circuit and the conductive coil, and a processor operatively connected with the display, the wireless charging circuit and the sensor circuit, wherein the sensor circuit may receive a first analog ping signal for wireless charging from an external electronic device, through the conductive coil, receive at least one second analog ping signal within a time selected after the first analog ping signal received, count the number of the second analog ping signals received within the selected time, and provide a notification signal to the processor if the number exceeds a first threshold. Other embodiments are also possible.