Foldable Display Hinge Magnet Layout for Precise Angle Sensing
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Solution Overview
Problem
Existing foldable electronic devices face challenges in accurately sensing the folding angle due to the small displacement of the magnetic field between a magnet and a sensor located far apart, which complicates the detection process and may require additional components for correction.
Innovation Solution
The magnet and sensor are positioned close to each other within the electronic device, ensuring a significant displacement of the magnetic field is detected without the need for additional components like gyro sensors, thereby enhancing the accuracy of folding angle sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnet and sensor are mounted on opposite sides of the folding region, then the device structure is simplified, but the magnetic field displacement becomes small and folding angle sensing accuracy deteriorates
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement (opposite sides of folding region) to a three-dimensional spatial arrangement where the magnet and sensor are positioned close to each other within the same housing. This dimensional change enables sufficient magnetic field displacement while maintaining structural simplicity through the hinge mechanism.
Solution Approach 2:
The hinge structure acts as an intermediary mechanism that couples the magnet's movement to the sensor's detection capability. By incorporating the magnet into the hinge structure rather than mounting it directly on opposite housing sides, the system achieves both structural simplicity and measurement accuracy through the hinge's rotational motion.
2Measurement precision
If the magnet and sensor are positioned close to each other, then folding angle sensing accuracy is improved, but the device size and thickness increase
Solution Approach 1:
The patent merges the magnet into the hinge structure itself rather than treating it as a separate component within the housing. This integration allows the magnet and sensor to be positioned close together for accurate sensing while utilizing the existing hinge space, thereby avoiding additional volume increase in the device.
Solution Approach 2:
The hinge structure serves multiple functions: it provides the mechanical folding mechanism and simultaneously houses the magnet for sensing purposes. This multi-functionality eliminates the need for separate dedicated spaces for the magnet and sensor, preventing device size and thickness increase while maintaining close positioning for accurate detection.
3Measurement precision
If additional components like gyro sensors are added for correction, then sensing accuracy is improved, but device complexity and size increase
Solution Approach 1:
The system achieves accurate folding angle sensing through the inherent magnetic field displacement caused by the hinge's rotational movement. The magnet and sensor configuration itself provides sufficient measurement capability without requiring external correction from additional components like gyro sensors, thereby maintaining simplicity while achieving the desired sensing accuracy.
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 precise folding angle detection and reduces the size and thickness of the electronic device while eliminating the necessity for extra components, thus optimizing its design.
Implementation Method 1
a sensor that is located on a side of the first housing and that detects a magnitude or direction of a magnetic field
Data Source
AI summary
An electronic device includes a display which is foldable at a folding region of the display, a housing which is foldable together with the display, the housing including a first housing and a second housing, and a sensor which is on the first housing and detects a magnetic field, and a hinge structure which corresponds to the folding region of the display, is foldable together with the display and hingedly connects the first housing and the second housing to each other, the hinge structure including a magnet which is slidable along the first housing. Folding of the hinge structure includes folding of the housing together with folding of the display and sliding of the magnet relative to the sensor.