Hall Sensor Flip Cover Angle Detection
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Solution Overview
Problem
Existing methods for sensing a flip cover or its angle variation in mobile terminals are limited, as they cannot detect horizontal slides or provide accurate motion sensing, particularly with the Korean Utility Model Registration No. 20-0167871, which relies on magnetic sensors but lacks comprehensive angle detection capabilities.
Innovation Solution
A method using a Hall sensor with multiple Hall elements to collect magnetic field intensity and direction, calculating the angle of the flip cover based on arithmetic mean values and logarithmic functions, and determining opening and closing thresholds to enhance sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic sensor is used to detect flip cover motion, then power supply control can be achieved, but the capacity to detect horizontal slide motion is insufficient
Solution Approach 1:
The magnetic sensor is divided into multiple Hall elements arranged in specific patterns. Each Hall element detects magnetic field components in different directions, allowing the system to distinguish between vertical closing motion and horizontal slide motion by analyzing the distribution and direction of magnetic field signals from different elements.
Solution Approach 2:
The invention transitions from detecting only vertical magnetic field components (single dimension) to detecting both vertical and horizontal magnetic field components (multiple dimensions). By arranging Hall elements to sense magnetic fields in different spatial directions, the system can determine the direction and type of flip cover motion, enabling detection of both closing actions and horizontal slides.
2Measurement precision
If multiple Hall elements are used to improve angle detection accuracy, then motion sensing precision is enhanced, but device complexity increases
Solution Approach 1:
The multiple Hall elements are not only used for angle detection but also serve dual purposes: detecting horizontal slide motion, determining flip cover state (open/closed), and providing redundancy for improved reliability. This multi-functional usage justifies the increased component count by extracting multiple valuable functions from a single sensor array.
Solution Approach 2:
The invention combines multiple Hall elements into a single integrated magnetic sensor module. Rather than treating each Hall element as a separate component, they are merged into one functional unit that collectively performs multiple detection functions, simplifying the overall system architecture and reducing the number of separate components needed.
3Measurement precision
If magnetic field intensity collection from multiple Hall elements is performed, then angle calculation accuracy improves, but processing complexity increases
Solution Approach 1:
The system collects magnetic field data from all Hall elements but does not process all data equally. Instead, it selectively uses data from specific Hall elements based on the detected motion type. For angle calculation, only the relevant Hall elements contributing to the angular position are processed, while other data is used for different purposes or discarded, reducing unnecessary processing complexity.
Solution Approach 2:
The patent introduces intermediate calculation steps that simplify the relationship between raw magnetic field data and final angle output. By using intermediate variables and staged processing (first calculating magnetic field vectors, then deriving angles from vectors), the system breaks down complex calculations into manageable steps, reducing processing complexity while maintaining 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
Enables precise detection of flip cover angles and movements, improving user interface changes and minimizing sensing errors, allowing for more accurate operation of mobile terminals.
Implementation Method 1
a Hall sensor which includes at least one Hall element and is included in a terminal
Data Source
AI summary
Provided is a method and devices for sensing a flip cover including determining an angle of the flip cover. A Hall sensor may be included in a mobile terminal (or display terminal) and may include at least one Hall element for collecting a magnetic field intensity generated from a magnet of the flip cover.