Piezoelectric Hinge for Dynamic Rotation Damping Control
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Solution Overview
Problem
Electronic devices, such as tablets and notebook PCs, face challenges in maintaining desired angles due to insufficient or excessive rotation damping, making it difficult to switch between usage modes without laborious manual operations.
Innovation Solution
An electronic device with a rotatable connection member that transitions between two states of rotation damping, allowing for easy angle adjustment and mode changes based on user instructions, such as changes in rotation angle or duration, using a piezoelectric rotation shaft with varying electric field intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotation damping coefficient is too small, then the PAD can be rotated easily when angle change is needed, but the frictional resistance generated is not sufficient for retaining the PAD at a desired angle
Solution Approach 1:
The patent applies a magnetic field to dynamically adjust the rotation damping coefficient of the rotation shaft. By changing the magnetic field intensity, the rotation damping can be varied between a first value (weaker damping) and a second value (stronger damping), allowing the system to adapt between ease of rotation and angle retention based on operational needs
Solution Approach 2:
The patent changes the physical parameter of rotation damping by applying a magnetic field to a magnetic substance in the rotation shaft assembly. This parameter change enables the rotation damping coefficient to be adjusted between different states, resolving the contradiction between easy rotation and stable angle retention
2Reliability
If the rotation damping coefficient is too large, then the PAD can be retained at the desired angle, but it becomes difficult to rotate the PAD when the angle is needed to be changed
Solution Approach 1:
The magnetic field-based adjustment mechanism allows dynamic switching between high damping (for retention) and low damping (for rotation) states, eliminating the need to choose between contradictory static configurations
Solution Approach 2:
By changing the magnetic field parameter, the rotation damping coefficient transitions between different values, enabling the system to overcome the trade-off between retention strength and rotational ease
3Measurement precision
If manual operation is required to change usage modes, then precise angle control is achieved, but user effort and time consumption increase
Solution Approach 1:
The system uses detection units to automatically detect usage scenarios and the control unit automatically adjusts the magnetic field to change rotation damping, enabling the device to self-adjust between usage modes without manual intervention while maintaining precise angle control
Solution Approach 2:
The detection unit provides feedback about the current usage state, and the control unit uses this feedback to automatically adjust the magnetic field and rotation damping, creating a closed-loop system that eliminates manual operation while maintaining precision
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 switching between usage modes without manual effort, improving user experience by maintaining desired angles and allowing for prolonged usage without manual intervention.
Implementation Method 1
In the case that the rotation shaft is made of a piezoelectric material, the first instruction is an instruction to change an intensity of electric field applied to the piezoelectric material
Data Source
AI summary
The present disclosure provides an information processing method and an electronic device. The electronic device comprises a first body, a second body and a rotatable connection member. The first body is connected with the second body by the rotatable connection member. The rotatable connection member has a first using state corresponding to a first rotation damping, and a second using state corresponding to a second rotation damping. In the case the rotatable connection member is in the first using state, the first body can be rotated with respect to the second body at the first rotation damping. The rotatable connection member is changed from the first using state to the second using state to keep a fixed angle between the first body and the second body in the case that a first instruction is received. The second rotation damping is greater than the first rotation damping.