Vibration Driving Circuit With Resonance Frequency Tracking
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Solution Overview
Problem
Existing electronic apparatuses drive vibration devices with fixed frequencies, leading to inefficient power consumption due to variations in resonance frequency caused by manufacturing errors and environmental differences.
Innovation Solution
A driving circuit that includes a signal generation circuit, detection circuit, and control circuit to dynamically adjust the driving frequency based on vibration information, such as frequency and amplitude, to match the vibration device's resonance frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed driving frequency is used to drive the vibration device, then the device complexity is reduced, but the power consumption efficiency deteriorates due to resonance frequency variations
Solution Approach 1:
The detection circuit monitors vibration information from the vibration device and feeds it back to the control circuit, which adjusts the driving frequency accordingly. This closed-loop feedback mechanism enables the system to maintain optimal power efficiency by adapting to resonance frequency variations while managing complexity through modular circuit design.
Solution Approach 2:
The driving frequency is transformed from a fixed parameter to a dynamic one that can be adjusted in real-time. The control circuit modifies the driving frequency based on detected vibration information, allowing the system to adapt to manufacturing variations and environmental changes, thereby maintaining high power efficiency without excessive complexity.
2Use of energy by moving object
If the driving frequency is adjusted dynamically to match resonance frequency, then the power consumption efficiency is improved, but the device complexity increases
Solution Approach 1:
The detection circuit serves multiple functions: it detects vibration information for frequency adjustment, monitors operational status, and provides feedback for optimization. This multi-functionality reduces the need for separate dedicated circuits, thereby limiting the increase in overall device complexity while achieving dynamic frequency adjustment for improved power efficiency.
Solution Approach 2:
The control circuit integrates multiple control functions including frequency adjustment, amplitude regulation, and phase control into a single unified unit. By merging these functions, the system achieves dynamic optimization of power efficiency without proportionally increasing complexity, as shared resources and coordinated control reduce the overhead of individual control mechanisms.
3Use of energy by moving object
If vibration information is detected continuously to optimize driving frequency, then the power consumption efficiency is improved, but the loss of time for detection and processing increases
Solution Approach 1:
The detection circuit operates periodically rather than continuously, sampling vibration information at optimized intervals. This periodic detection approach maintains power efficiency by keeping the driving frequency updated while reducing the time loss associated with constant monitoring and processing, as the system can function effectively between detection cycles.
Solution Approach 2:
The system performs preliminary detection and frequency adjustment during initialization or low-load periods, establishing optimal operating parameters in advance. This preliminary action reduces the need for frequent real-time adjustments during high-performance operations, thereby minimizing detection and processing time loss while maintaining power efficiency.
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
The driving circuit efficiently drives the vibration device by aligning the driving frequency with the resonance frequency, enhancing power efficiency and reproducing realistic tactile feedback.
Implementation Method 1
The vibration device has highest efficiency of power consumption when a driving frequency for driving the vibration device coincides with a resonance frequency of the vibration device
Data Source
AI summary
Provided is a driving circuit for driving a vibration device that vibrates according to a driving signal, the driving circuit including a signal generation circuit that, in operation, generates the driving signal so as to have a driving frequency, and transmits the driving signal to the vibration device, a detection circuit that, in operation, detects vibration information related to a vibration of the vibration device from the vibration device, and a control circuit that, in operation, determines the driving frequency of the driving signal based on the vibration information detected by the detection circuit, and transmits information indicating the driving frequency to the signal generation circuit.