Wireless Charging Mode Switching for Magnet Alignment Errors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic power profile (MPP) wireless charging systems face efficiency issues due to inaccurate alignment of magnets, often caused by non-genuine cover accessories with magnets, leading to repeated charging errors.
Innovation Solution
An electronic device that uses a coil and a controller to perform wireless charging by outputting pings and negotiating power transfer based on alignment states, independently of magnet recognition, through first and second negotiation communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If MPP wireless charging is used to fix coils to optimal positions using magnets, then wireless charging efficiency is improved, but charging reliability deteriorates when magnet alignment is inaccurate due to non-genuine cover accessories
Solution Approach 1:
The patent extracts the magnet alignment dependency from the wireless charging system by introducing a dual-mode negotiation mechanism. The system can operate in MPP mode when magnets are properly aligned, but switches to BPP/EPP mode when magnet alignment fails, thereby removing the reliability constraint while preserving efficiency benefits when conditions are optimal.
Solution Approach 2:
The patent changes the operational parameters of the wireless charging system by implementing dynamic mode switching between MPP, BPP, and EPP based on negotiation outcomes. This allows the system to adapt power transmission parameters according to alignment conditions, maintaining efficiency when possible and ensuring reliability when alignment is poor.
2Manufacturing precision
If MPP negotiation communication is performed based on magnet alignment, then coil alignment precision is improved, but device adaptability deteriorates when dealing with non-genuine accessories
Solution Approach 1:
The patent implements multi-functionality by enabling the wireless charging device to perform both MPP negotiation (requiring magnet alignment) and BPP/EPP negotiation (independent of magnets). This universal approach allows the same device to work with both genuine accessories that support MPP and non-genuine accessories that may only support BPP/EPP, thereby improving adaptability without sacrificing alignment precision when MPP is available.
Solution Approach 2:
The patent introduces dynamic negotiation capability where the system can switch between different communication protocols (MPP, BPP, EPP) based on real-time detection of accessory type and alignment status. This dynamic adaptability ensures optimal performance with genuine accessories while maintaining functionality with non-genuine ones.
3Measurement precision
If repeated ping output is performed to detect alignment state, then alignment detection accuracy is improved, but charging speed deteriorates due to multiple negotiation attempts
Solution Approach 1:
The patent performs preliminary alignment detection through multiple ping outputs and negotiation attempts before committing to a charging mode. By预先 (in advance) determining the appropriate mode (MPP vs. BPP/EPP) through accurate detection, the system avoids repeated interruptions during charging, thereby maintaining both detection accuracy and overall charging speed.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors negotiation outcomes and alignment detection results to make informed decisions about mode selection. This feedback loop ensures accurate alignment detection while minimizing the number of retry attempts needed, thus balancing detection precision with charging efficiency.
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
Prevents and reduces charging errors by aligning coils optimally without relying on magnet alignment, ensuring reliable wireless charging.
Implementation Method 1
a transmitting integrated circuit (IC) configured to wirelessly transmit power to an external device through the coil
Implementation Method 2
MPP supports wireless charging based on the alignment state between the power receiving device (e.g., smartphone) and the power supply device (e.g., wireless charging pad) using magnets
Data Source
AI summary
Embodiments of the disclosure relate to an electronic device for wirelessly transmitting or wirelessly receiving electric power and a method of driving the same, which may output a first ping and/or a second ping through a coil, count an N value indicating a cumulative number of times the first ping and/or the second ping has been output, if the N value is less than a specified first threshold and if a response to the first ping is received from the external device, perform first negotiation communication with the external device for first wireless charging, the first wireless charging being performed based on an alignment state between the electronic device and the external device using a magnet, if the N value is less than the first threshold and if a response to the second ping is received from the external device, output the first ping and/or the second ping again, and, if the N value is greater than or equal to the first threshold, perform second negotiation communication with the external device for second wireless charging independent of recognizing the magnet.