Meander Oscillator Geometry for Large Mirror Amplitude
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Solution Overview
Problem
Conventional optical reflection elements face challenges in achieving a larger mirror amplitude angle while maintaining high resolution, as increasing resolution reduces the mirror amplitude angle, making large screen projection difficult.
Innovation Solution
The optical reflection element features a frame-shaped supporting body with two oscillators and a mirror portion, where the mirror is positioned between the oscillators, and the oscillators have a meander shape with specific turn portions located outside or inside certain axes, optimizing energy transfer efficiency and increasing the mirror amplitude angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the drive frequency is increased to increase resolution, then the resolution is improved, but the mirror amplitude angle is reduced
Solution Approach 1:
The patent changes the structural parameters of the oscillator by positioning turn portions at specific locations (outside first end portion axis or inside first end portion axis) to optimize the oscillation characteristics. This allows the system to achieve both high resolution and large mirror amplitude angle by adjusting the geometric parameters of the oscillator structure.
Solution Approach 2:
The patent introduces asymmetric positioning of turn portions relative to the mirror portion central axis and end portion axes. By making the oscillator structure asymmetric in its turn portion placement, the system achieves optimized energy transfer efficiency that allows simultaneous achievement of high resolution and large amplitude angle, resolving the conventional trade-off.
2Area of moving object
If the mirror amplitude angle is increased for large screen projection, then the screen size is improved, but the energy transfer efficiency is reduced
Solution Approach 1:
The patent employs asymmetric positioning of turn portions to optimize the oscillator's energy transfer characteristics. By strategically placing turn portions outside or inside the end portion axes, the system achieves efficient energy transfer even at large mirror amplitude angles, enabling large screen projection without significant energy loss.
Solution Approach 2:
The patent optimizes the oscillator structure by adjusting the position parameters of turn portions relative to the mirror portion and supporting body. This parameter optimization ensures that energy transfer efficiency is maintained even when the mirror amplitude angle is increased for large screen applications.
3Device complexity
If the oscillators are positioned with turn portions on the end portion axis, then the structure is simplified, but the energy transfer efficiency is reduced
Solution Approach 1:
The patent deliberately introduces asymmetry in the oscillator structure by positioning turn portions either outside the first end portion axis or inside the first end portion axis. This asymmetric configuration, while increasing structural complexity slightly, significantly improves energy transfer efficiency by optimizing the oscillation mode and reducing energy losses.
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 allows for a highly efficient optical reflection element with a larger mirror amplitude angle, enabling high-resolution image projection on larger screens with improved energy transfer efficiency.
Implementation Method 1
drive elements each made of a lower electrode layer, a piezoelectric body layer, and an upper electrode layer are arranged, respectively. Applying a voltage to these drive elements allows oscillators 3 to be driven and mirror portion 1 to perform turning (pivoting) movement.
Implementation Method 2
Each of oscillators 3 is made of plurality of oscillating plates 3A to 3D, 3E to 3H joined so as to turn back in a meander shape. Applying a voltage to these drive elements allows oscillators 3 to be driven and mirror portion 1 to perform turning (pivoting) movement.
Implementation Method 3
Mirror portion 1 can scan the reflected light on a screen when light enters mirror portion 1 and mirror portion 1 turns.
Data Source
AI summary
An optical reflection element has a frame-shaped supporting body, a first oscillator and a second oscillator each having a meander shape, and a mirror portion. A line segment connecting a joining position between the mirror portion and the first oscillator to a joining position between the supporting body and the first oscillator, and a line segment connecting a joining position of the mirror portion and the second oscillator to a joining position of the supporting body and the second oscillator cross a mirror portion central axis. As one illustrative condition to be satisfied, an outer circumference of at least any one of turn portions of the first oscillator and the second oscillator is deviated from a first end portion axis that is parallel to the mirror portion central axis and extends along a first side of the mirror portion.