Single Magnet Locking and Position Detection for Thin Bezel Electronics
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Solution Overview
Problem
Conventional electronic devices with rotating lids face challenges in reducing bezel size due to the need for separate magnets for locking and position status detection, which limits design optimization and increases complexity and cost.
Innovation Solution
An improved locking and position status detection scheme that uses a single magnet on one member and a sensor and magnet on another member, with the sensor detecting perpendicular magnetic fields to determine the device's position, allowing for reduced bezel area usage and simplified design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate magnets are used for locking and position status detection, then reliable locking and detection functions are achieved, but device complexity and bezel space requirements increase
Solution Approach 1:
The patent combines the locking magnet and position detection magnet into a single integrated magnet assembly. This single magnet serves dual purposes: providing magnetic attraction for locking the display assembly to the base assembly and generating the magnetic field detected by the Hall effect sensor for position status detection. This merging eliminates the need for separate magnets while maintaining both locking reliability and position detection accuracy.
Solution Approach 2:
The single magnet in the display assembly is designed to perform multiple functions simultaneously. It acts as both the locking mechanism (through magnetic attraction to the base assembly magnet) and the position detection signal source (through its magnetic field interaction with the Hall effect sensor). This multi-functionality reduces component count and simplifies the overall system design while preserving the required reliability.
2Reliability
If multiple magnets are placed in the bezel area, then locking and detection functions are achieved, but available bezel space for other components is reduced
Solution Approach 1:
By merging the locking magnet and position detection magnet into a single integrated component, the patent reduces the total magnetic component footprint in the bezel area. This single magnet is positioned to optimize both locking performance and Hall effect sensor detection, thereby freeing up additional bezel space for other display components or features.
Solution Approach 2:
The patent utilizes the vertical dimension (depth/thickness) of the display assembly to position the Hall effect sensor and magnet in a stacked configuration rather than requiring them to be spaced apart in the horizontal plane. This vertical arrangement allows compact positioning within the bezel area while maintaining functional requirements.
3Device complexity
If magnets are positioned close to the sensor, then compact design is achieved, but magnetic interference and false detection may occur
Solution Approach 1:
The patent employs a Hall effect sensor that is specifically oriented and positioned to detect magnetic fields with a specific spatial frequency and directionality. The single magnet is positioned to create a magnetic field pattern that produces a distinct signal characteristic of the closed position, while the sensor's local sensitivity characteristics are optimized to distinguish this pattern from other magnetic field configurations, thereby avoiding false detection.
Solution Approach 2:
The patent replaces mechanical positioning systems (such as separate magnets and switches or reed switches requiring precise spacing) with a Hall effect sensor-based magnetic field detection system. This substitution allows for more flexible magnet positioning and eliminates the need for precise mechanical spacing, as the Hall sensor can detect magnetic field variations over a range of distances with high sensitivity and 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 solution enables a more compact design by reducing the number of magnets needed, minimizing magnetic interference, and lowering system complexity and costs, while maintaining effective locking and position detection functionality.
Implementation Method 1
A sensor, positioned adjacent to the second magnet in the second member, is to detect the magnetic field produced by the first magnet
Implementation Method 2
the first magnet and the second magnet are engaged to magnetically hold the first member to the second member
Data Source
AI summary
An example apparatus comprises a first member with a first surface, where the first member is movable relative to a second member with a second surface. The first member comprises a first magnet configured to produce a first magnetic field. The second member comprises a sensor operatively connected to a processor and a second magnet adjacent to the sensor. In a first position, the first magnet and the second magnet are engaged to magnetically hold the first member to the second member such that at least a portion of the first surface of the first member opposes at least a portion of the second surface of the second member. In the first position, the sensor is to detect the first magnetic field produced by the first magnet and is to send a signal to the processor in response to detecting the first magnetic field produced by the first magnet.