Rotatable Display Magnet Sensor State Detection
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Solution Overview
Problem
Conventional electronic apparatuses with rotatable display units face challenges in reducing size and preventing faulty assembly due to the use of two magnets for state detection, which complicates the external form and assembly process.
Innovation Solution
An electronic apparatus with a rotatable display unit uses a single magnet and three sensors (open/close, rotation, and close sensors) to detect states, allowing for size reduction and simplified assembly by controlling the display state based on the detected magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two magnets are used to detect display unit states, then detection reliability is improved, but device size increases and assembly complexity increases
Solution Approach 1:
The patent combines multiple detection functions into a single magnet by strategically positioning one magnet relative to three sensors (open/close sensor, rotation sensor, and close sensor). This single magnet generates magnetic fields that all three sensors can detect, eliminating the need for separate magnets for each detection function and thereby reducing overall device size while maintaining detection reliability.
Solution Approach 2:
The single magnet serves multiple detection functions simultaneously - it enables detection of open/close states, rotation states, and close states through its interaction with three different sensors. This multi-functional approach allows one component to replace what would traditionally require multiple components, reducing device complexity and size.
2Reliability
If two magnets of similar size are used, then detection coverage is improved, but assembly difficulty increases due to faulty assembly likelihood
Solution Approach 1:
The patent employs asymmetric positioning of a single magnet relative to three sensors arranged at different locations and orientations. The magnet is positioned to create distinct magnetic field interactions with each sensor, allowing each sensor to detect specific states (open/close, rotation, close) through its unique spatial relationship with the magnet. This asymmetric configuration simplifies assembly by eliminating the need to position multiple magnets with precise relative orientations.
3Measurement precision
If multiple sensors are used to detect different states, then state detection precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the detection function into three specialized sensors, each responsible for detecting a specific state parameter (open/close state, rotation state, and close state). By segmenting the detection tasks among three sensors rather than using a single complex sensor or two magnets with multiple sensors, the system achieves precise multi-state detection while maintaining manageable device complexity through clear functional separation.
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 configuration enables efficient detection of the display unit's state using a magnetic sensor, reducing the apparatus's size and improving assembly ease while maintaining reliable operation.
Implementation Method 1
a magnet configured to generate a magnetic field, a first sensor configured to detect, based on the magnetic field, a first state of the display unit in the first direction
Data Source
AI summary
An electronic apparatus includes a display unit configured to be rotatable with respect to a main body unit in a first direction about a first axis and a second direction about a second axis, a magnet configured to generate a magnetic field, a first sensor configured to detect, based on the magnetic field, a first state of the display unit in the first direction, a second sensor configured to detect, based on the magnetic field, a second state of the display unit in the second direction, a third sensor configured to detect, based on the magnetic field, a third state of the display unit, and a control unit configured to control a display state of the display unit based on the first state, the second state, and the third state.