Piezoelectric Movable Device for Two-Dimensional Deflection Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical deflectors in oscillator devices lack the ability to achieve two-dimensional deflection with efficient control over the rotation axis direction and suffer from limitations in deflection angle and image quality due to ringing and resonance.
Innovation Solution
A movable device with a meandering structure incorporating two drive units, each with piezoelectric drivers, allows independent control of rotation axes by applying alternating voltages to achieve two-dimensional rotation, reducing ringing and enhancing image quality through a meandering design that increases deflection angle and amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional optical deflector with single drive unit is used, then the structure is simple, but the deflection angle and amplitude are limited
Solution Approach 1:
The optical deflector is divided into multiple independent drive units (first drive unit with first driver, second drive unit with second driver) that can be controlled separately. Each drive unit contributes to different components of the deflection, enabling larger overall deflection angles and amplitudes while maintaining independent control capability
Solution Approach 2:
Multiple drive units are combined in a meandering configuration where their individual deflection contributions merge to achieve cumulative deflection effects. The meandering structure allows the optical beam to traverse a longer path with multiple deflection segments, increasing the effective deflection angle and amplitude without requiring a single large-movement mechanism
2Ease of operation
If conventional drive control is used, then the control is simple, but ringing and resonance occur reducing image quality
Solution Approach 1:
The multiple drive units are activated in a coordinated periodic sequence rather than simultaneously or in simple succession. This periodic activation pattern allows the system to exploit resonant frequencies constructively while avoiding harmful ringing, improving image quality through controlled oscillatory motion that maintains stability
Solution Approach 2:
The independent control of multiple drive units enables feedback mechanisms where the motion state of one drive unit can be monitored and used to adjust the activation timing and amplitude of subsequent drive units. This feedback control suppresses unwanted ringing and resonance by compensating for deviations in real-time, maintaining high image quality
3Manufacturing precision
If the deflection angle is increased to improve image quality, then the amplitude increases, but the device size grows
Solution Approach 1:
The meandering structure extends the deflection path into additional spatial dimensions rather than relying on a single large angular movement. By creating a multi-segment path that meanders through space, the system achieves large effective deflection angles and amplitudes while keeping each individual movement segment small, thus maintaining a compact overall device footprint
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 solution enables precise two-dimensional rotation control, reduces ringing, and enhances image quality by increasing the deflection angle and amplitude, while also allowing for a more compact and cost-effective design.
Implementation Method 1
a first member (100) having one end (112) coupled to the support body (102) and another end (111) coupled to the movable portion (101); the first member (100) including a first driver (113a, 113b)... a second member (130) having one end (116) coupled to the support body (102) and another end (115) coupled to the movable portion (101), the second member (130) including a second driver (114a, 114b)
Data Source
AI summary
A movable device includes: a movable portion; a support body; a first member having one end coupled to the support body and another end coupled to the movable portion; the first member including a first driver; and a second member having one end coupled to the support body and another end coupled to the movable portion, the second member including a second driver. The movable portion rotates about a first rotation axis by driving the first driver and without driving the second driver. The movable portion rotates about a second rotation axis by driving the second driver and without driving the first driver. The first rotation axis intersects the second rotation axis.