Hall IC Wireless Charging Cover State Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices cannot determine if the lid of a cover is folded backwards, which can lead to damage to a card during wireless charging due to high voltage, as they can only differentiate between the lid being closed or open.
Innovation Solution
Incorporating a hall integrated circuit (IC) to detect magnetic flux generated by magnets in the cover, allowing the processor to identify the state of the cover as closed, open, or backward-folded, and control the wireless charging circuit accordingly to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless charging is performed without detecting the cover state, then charging speed is maintained, but the card in the lid may be damaged by high voltage
Solution Approach 1:
The patent replaces mechanical state detection (physically checking cover position) with magnetic field detection using a hall sensor. The hall sensor detects the magnetic field generated by a magnet in the cover to determine cover state, eliminating the need for complex mechanical switches or physical contact mechanisms while enabling reliable detection of the backward-folded state to prevent card damage during wireless charging
Solution Approach 2:
The patent introduces a hall sensor as an intermediary component between the cover mechanism and the wireless charging control system. This sensor acts as a mediator that translates physical cover position into electrical signals that the processor can interpret, enabling indirect detection of cover state without direct mechanical connection or complex sensing mechanisms
2Measurement precision
If a hall sensor is added to detect magnetic flux, then cover state detection precision is improved, but device complexity increases
Solution Approach 1:
The hall sensor serves multiple functions: it detects the cover's closed/open state, identifies the backward-folded state, and provides information for wireless charging control. By using a single component with multiple detection capabilities, the patent achieves precise cover state detection without proportionally increasing device complexity
Solution Approach 2:
The patent utilizes changes in magnetic field parameters (presence, strength, direction) to differentiate between various cover states. The hall sensor detects these magnetic parameter changes to determine whether the cover is closed, open, or backward-folded, enabling precise state detection through physical parameter variation rather than complex structural changes
3Ease of operation
If the lid is folded backwards during wireless charging, then device portability is improved, but the card may be damaged by high voltage
Solution Approach 1:
The patent performs preliminary detection of the cover state using the hall sensor before initiating wireless charging. If the backward-folded state is detected, the system preemptively prevents wireless charging from occurring, thereby preventing card damage before it can happen. This preliminary action allows users to maintain device portability by folding the cover backward while ensuring card protection through advance state verification
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 damage to cards by accurately identifying the cover's state and blocking wireless charging when the lid is backward-folded, ensuring safe charging operations.
Implementation Method 1
a hall integrated circuit (IC) configured to detect magnetic flux generated by an external device enclosing at least a portion of the electronic device
Data Source
AI summary
An electronic device according to various embodiments may include: a hall integrated circuit (IC) configured to detect magnetic flux generated by an external device enclosing at least a portion of the electronic device; a wireless charging circuit; and at least one processor configured to be connected to the hall IC and the wireless charging circuit, wherein the at least one processor is configured to: receive an output value for the detected magnetic flux from the hall IC; and control the wireless charging circuit, based on the output value.