Hall Sensor Layout for Foldable Device State Detection
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Solution Overview
Problem
The magnetic fields generated by multiple magnets in electronic devices with flexible display panels can interfere with the performance of internal components, necessitating the placement of hall sensors to minimize the number of magnets while accurately identifying different device states.
Innovation Solution
The electronic device is designed with a hall sensor positioned between the periphery of the first surface adjacent to a magnet and perpendicular to the folding axis, mounted on a printed circuit board, to effectively identify the folding state while minimizing magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple magnets are used to maintain and identify folding states, then the device can provide various functions according to different states, but the magnetic fields from the magnets interfere with the performance of internal components
Solution Approach 1:
A hall sensor is introduced as an intermediary component to detect the magnetic fields from the magnets and convert them into electrical signals that the processor can interpret. This allows the system to utilize the magnetic fields for state identification while the hall sensor acts as a buffer between the magnetic sources and other sensitive electronic components, reducing direct magnetic interference with the overall system performance.
2Measurement precision
If the hall sensor is positioned close to the magnet to accurately identify folding states, then state detection precision improves, but magnetic interference with other components increases
Solution Approach 1:
The hall sensor is positioned at a specific location where it can effectively detect the magnetic field changes corresponding to different folding states while being situated in a region that minimizes interference with other internal components. The sensor is placed on the printed circuit board at a coordinate that optimizes the balance between detection accuracy and reducing magnetic field interference with surrounding electronics.
3Object-affected harmful factors
If the number of magnets is reduced to minimize magnetic interference, then magnetic field interference decreases, but the ability to maintain and identify folding states is compromised
Solution Approach 1:
The hall sensor is designed to detect magnetic fields from multiple magnets simultaneously and distinguish between different magnetic field patterns corresponding to various folding states. This allows the system to use a reduced number of magnets while the single hall sensor performs the universal function of identifying all different folding states by analyzing the combined magnetic field information from the remaining magnets.
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 configuration allows for accurate identification of device states while reducing magnetic interference with internal components, enhancing the device's functionality and reliability.
Implementation Method 1
a hall sensor that identifies the various states using a magnetic field from at least some of the plurality of magnets
Data Source
AI summary
An electronic device is disclosed, including: a first housing, a second housing, a folding housing that pivotably connects the first housing and second housing, a flexible display spanning the first, second and folding housings, a printed circuit board (PCB), a first camera module at least partly visible through a surface of the second housing, a first magnet disposed in the first housing, a second magnet disposed in the second housing, and a hall sensor disposed on the PCB, the hall sensor configured to detect magnetic flux caused by motion of the first and/or second magnet in folding and unfolding of the electronic device so as facilitate determination of a configuration state of the electronic device.