Multi-Directional Magnetic Sensing for Accurate Case-Trigger Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic sensor apparatuses in electronic equipment, such as mobile phones and tablets, are susceptible to interference from internal and external magnetic fields, leading to inadvertent triggering of functions due to their single-direction magnetic field monitoring, especially when used with protective cases that contain magnets.
Innovation Solution
Incorporating a magnetic sensor apparatus with at least two magnetic field detectors that sense magnetic fields in different directions, connected to a control circuit which sends signals to the motherboard only when external magnetic induction exceeds preset thresholds, thereby improving precision and reducing false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnetic field detector is used to monitor magnetic field in one direction, then the device complexity is reduced, but the reliability of function triggering is worsened due to susceptibility to interference from internal and external magnetic fields
Solution Approach 1:
The patent transitions from single-direction magnetic field monitoring to multi-directional monitoring by adding at least one more magnetic field detector oriented in a different direction. This dimensional expansion allows the system to distinguish between magnetic fields originating from the protective case (which affect detectors differently based on orientation) and genuine external magnetic fields, thereby improving trigger reliability without excessive complexity increase
2Device complexity
If a magnetic sensor apparatus monitors magnetic field in a single direction, then the device complexity is simplified, but the measurement precision is worsened due to inability to distinguish between internal and external magnetic field sources
Solution Approach 1:
By introducing multiple magnetic field detectors with different sensing directions, the system gains angular/directional information about magnetic field sources. This allows the control circuit to analyze magnetic field characteristics from multiple perspectives and precisely identify whether the field originates from the protective case magnet or external sources, significantly improving measurement precision
Solution Approach 2:
The control circuit continuously monitors magnetic field readings from multiple detectors and uses this feedback to determine the origin of magnetic fields. By comparing the magnetic field signals detected in different directions against predetermined thresholds and patterns, the system can accurately distinguish between case-related fields and external interference, enhancing measurement precision
3Reliability
If at least two magnetic field detectors sensing in different directions are added, then the reliability and measurement precision are improved, but the device complexity increases
Solution Approach 1:
The patent adds directional dimension to magnetic field sensing by incorporating multiple detectors at different orientations. This approach improves reliability by enabling the system to differentiate between magnetic fields from the protective case and external sources, while the complexity increase is managed through efficient control circuit design that processes multi-directional data
4Measurement precision
If at least two magnetic field detectors sensing in different directions are added, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system enhances measurement precision by incorporating directional information through multiple magnetic field detectors. The control circuit processes signals from detectors oriented in different directions to accurately identify the source of magnetic fields, while managing the increased complexity through efficient signal processing algorithms and threshold-based decision making
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 multi-directional sensing approach enhances the accuracy of magnetic field monitoring, preventing unintended function triggers and improving the user experience by accurately controlling electronic equipment functions based on magnetic field changes, especially during the opening and closing of protective cases.
Implementation Method 1
at least two magnetic field detectors that can sense a magnetic field respectively in two sensing directions differing from one another
Data Source
AI summary
Electronic equipment can include an equipment body and a magnetic sensor apparatus assembled to the equipment body. The magnetic sensor apparatus can be provided with at least two magnetic field detectors. Any two magnetic field detectors sense a magnetic field respectively in two different sensing directions. A control circuit sends a sensor signal to a motherboard only when each magnetic field detector senses, in a respective sensing direction, external magnetic induction of no less than a respective preset threshold corresponding to the each magnetic field detector. The motherboard sends a control signal to control the equipment body according to the sensor signal.