Magnetic Sensor Rotation Detection for Electronic Device Display Control
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Solution Overview
Problem
Electronic devices with rotatable display units face challenges in maintaining proper image display across various rotation states, requiring complex control mechanisms to adjust the image orientation based on the display unit's position relative to the body.
Innovation Solution
Incorporating magnetic-field generating portions and detection sensors to determine the rotation state of the display unit, allowing a control unit to adjust the display form accordingly, ensuring proper image orientation and visibility during different angles of operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control is performed based on mechanical sensors or switches to detect display unit rotation state, then the control mechanism becomes complex and prone to wear, but the patent uses magnetic field sensors to simplify the detection mechanism
Solution Approach 1:
The patent replaces mechanical sensors and switches with magnetic field sensors (first and second magnetic-field detection sensors) and magnetic-field generating portions. This substitution eliminates mechanical contact and wear, reducing device complexity while maintaining reliable detection of the display unit's rotation state around both the first and second axes.
2Measurement precision
If magnetic field generating portions are positioned symmetrically about the second axis, then the detection accuracy for rotation around the first axis is improved, but the device complexity increases
Solution Approach 1:
The patent employs asymmetric positioning of the first magnetic-field generating portion relative to the first axis, while maintaining symmetry of the second magnetic-field generating portion about the second axis. This asymmetric-symmetric combination optimizes the magnetic field distribution for accurate detection of rotation around both axes, improving measurement precision without excessive complexity.
Solution Approach 2:
The patent extends the detection system from a single-axis to a two-axis rotation detection by adding the second magnetic-field generating portion and second magnetic-field detection sensor. This dimensional extension enables simultaneous detection of rotation around both the first and second axes, improving comprehensive measurement precision.
3Adaptability or versatility
If the display unit can rotate around two perpendicular axes, then the versatility of photographing angles is improved, but the control complexity to maintain proper image display increases
Solution Approach 1:
The patent implements a universal control system that handles multiple rotation states around two perpendicular axes using a unified magnetic field detection approach. The first and second magnetic-field detection sensors work together with their corresponding magnetic-field generating portions to provide comprehensive detection, enabling the display unit to achieve versatile photographing angles through a coordinated multi-functional detection and control mechanism.
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 seamless image display and control across various rotation states, enhancing user experience by automatically adjusting the display based on the device's orientation, preventing erroneous display control during state transitions.
Implementation Method 1
The movable unit includes a first magnetic-field generating portion arranged near the first axis; and a second magnetic-field generating portion arranged at a position at which the second magnetic-field generating means is substantially symmetric to the first magnetic-field generating portion about the second axis
Data Source
AI summary
First and second magnets are provided in a movable unit that is coupled with a body, the movable unit being rotatable with respect to the body around a first axis and a second axis that is substantially perpendicular to the first axis. First and second magnetic-field sensors are provided in the body. Based on output signals of the first and second magnetic-field sensors, control is performed in accordance with a state of the movable unit with respect to the body.