Flexible Display Hinge State Detection Using Dual-Axis Magnetic Sensing
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Solution Overview
Problem
Existing electronic devices with flexible displays face challenges in accurately detecting their state changes due to variations in magnetic flux density, especially when exposed to external magnetic fields, which can cause noise and affect the intensity of magnetic flux.
Innovation Solution
An electronic device equipped with a magnet having opposite polarities and a sensor that moves along the magnet's central axis to detect two directional components of magnetic flux density, using this data to determine the device's state and correct for external magnetic field influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor detects magnetic flux density to determine device state, then state detection capability is improved, but external magnetic fields cause noise and reduce measurement accuracy
Solution Approach 1:
The patent detects external magnetic field interference as a separate measurable quantity and uses it to correct the state detection measurements. By treating the harmful external field as a detectable signal, the system converts the interference into useful information for compensation, thereby maintaining accurate state detection despite the presence of external magnetic fields.
Solution Approach 2:
The patent introduces a correction mechanism that acts as an intermediary between the raw magnetic flux density measurement and the final state determination. This intermediary process separates the device state signal from the external field interference by detecting variations in different directional components and using their relationship to isolate and correct for external field effects.
2Measurement precision
If magnetic flux density variations are used for state detection, then state sensing capability is improved, but magnetic flux intensity fluctuations cause detection errors
Solution Approach 1:
The patent transitions from detecting a single magnetic flux density value to detecting multiple directional components (at least two components) of the magnetic flux density vector. By adding dimensional information about the direction and orientation of the magnetic field, the system can distinguish between flux variations caused by device state changes and those caused by external field fluctuations, thereby improving both accuracy and reliability.
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
The solution allows for precise detection of the electronic device's state and reduction of magnetic flux intensity, enabling accurate state determination and noise correction, thereby improving the device's operational reliability.
Implementation Method 1
a magnet having at least two polarities arranged in a first direction on a flat surface thereof
Implementation Method 2
a sensor configured to move in the first direction along a central axis of the magnet over the magnet and detect at least two directional components including a first directional component and a second directional component of magnetic flux density
Data Source
AI summary
An example electronic device includes a first housing; a second housing coupled to be movable with respect to the first housing; a flexible display disposed on at least a portion of the first housing and the second housing; a magnet having at least two polarities arranged in a first direction in one plane; a sensor configured to move in the first direction along the central axis of the magnet as the arrangement of the second housing relative to the first housing is changed, and detect at least two or more direction components including a first direction component and a second direction component of magnetic flux density; a memory configured to store state reference information on a state of the electronic device corresponding to the first direction component and the second direction component; and a processor configured to obtain magnetic detection data including the at least two or more direction components from the sensor; and detect the state of the electronic device based on the obtained magnetic detection data and the state reference information.