Protective Cover Magnet Segmentation for Hall Sensor Activation
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Solution Overview
Problem
The increased magnetic field intensity required to ensure the Hall sensor is activated by the protective cover's magnet affects the stability of the electronic compass, reducing its accuracy.
Innovation Solution
A protective cover with a magnet body comprising at least two magnets, arranged symmetrically on either side of the Hall sensor, allowing magnetic field lines to pass through when the cover is closed and moving, without increasing the magnetic field intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic field intensity of the magnet is increased to ensure the Hall sensor is activated when the protective cover moves, then the reliability of screen lock and waking function is improved, but the stability of the electronic compass deteriorates
Solution Approach 1:
The single magnet is divided into multiple magnets (first magnet, second magnet, and optionally third and fourth magnets). Each magnet generates a magnetic field that can independently activate the Hall sensor. This segmentation allows the system to maintain reliable screen lock and waking functions while using multiple weaker magnets instead of one strong magnet, thereby preserving electronic compass stability.
Solution Approach 2:
Multiple magnets are combined to work together in activating the Hall sensor. The magnetic fields from multiple magnets are superimposed, ensuring that at least one magnet's field lines pass through the Hall sensor regardless of the protective cover's position. This combination achieves the same functional effect as a single strong magnet but with distributed, weaker magnetic sources that don't interfere with the electronic compass.
2Device complexity
If a single magnet is used in the protective cover, then the device complexity is reduced, but the reliability of Hall sensor activation deteriorates when the cover moves
Solution Approach 1:
The single magnet is segmented into multiple magnets arranged at specific positions (first magnet at first position, second magnet at second position, etc.). This segmentation increases the probability that at least one magnet will be in the correct position to activate the Hall sensor, improving reliability while maintaining a relatively simple overall structure.
Solution Approach 2:
The solution transitions from a single-point magnet arrangement to a multi-point spatial distribution. By placing magnets at multiple positions (first position, second position, third position, fourth position), the system creates redundancy in the magnetic field coverage area, ensuring reliable Hall sensor activation across different cover positions.
3Reliability
If the relative position between the Hall sensor and magnet requires high precision, then the screen lock function is reliable, but the manufacturing precision requirement increases
Solution Approach 1:
Instead of requiring one precise magnet-Hall sensor alignment, the system uses multiple magnets at different positions. This segmentation creates multiple potential alignment points, reducing the precision requirement for each individual magnet while maintaining overall system reliability.
Solution Approach 2:
The patent anticipates potential misalignment issues by pre-positioning multiple magnets at different locations. This creates a buffer against positioning errors, ensuring that even if one magnet is slightly misaligned, other magnets can compensate and still activate the Hall sensor reliably.
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
Ensures the Hall sensor remains activated without compromising the electronic compass's accuracy, maintaining effective screen lock and waking functionality.
Implementation Method 1
the protective cover is provided with a magnet body including magnets... magnetic field lines of the first and second magnets pass through the Hall sensor
Implementation Method 2
the electronic equipment is usually provided with a Hall sensor, while the protective cover is provided with a magnet, so as to ensure that the Hall sensor is in the magnetic field of the magnet
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2D
AI summary
The present disclosure discloses a protective cover (b2) and an equipment having the protective cover, belonging to the field of electronic equipment accessories. The equipment having the protective cover includes an electronic equipment (b4) and a protective cover; the electronic equipment includes a screen and a Hall sensor (H); the protective cover (b2) is provided with a magnet body including at least two magnets (b22, b24), wherein magnet lines of at least one magnet pass through the Hall sensor when the protective cover covers on the screen. By providing at least two magnets in the protective cover, when the protective cover covers and moves on the screen, the magnet lines of at least one magnet of the two magnets are able to pass through the Hall sensor in the electronic equipment, such that the problem that the stability of an electronic compass of the electronic equipment will be affected due to the increased magnetic field intensity can be solved.