Micromirror Oscillation Layout Without Under-Mirror Coil Layers
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Solution Overview
Problem
Existing micromechanical oscillation systems face challenges in simplifying the installation of magnets, which can lead to residual stresses and undesired warping due to the need for insulation and conductive layers underneath the micromirror.
Innovation Solution
A micromechanical oscillation system with an electromagnetic drive unit where the coil body extends laterally to the micromirror, eliminating the need for insulation and conductive layers underneath, and utilizing a magnet positioned underneath the coil body within its stray field, along with magnetic flux guides to focus and shield the magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnets are installed in existing micromechanical oscillation systems, then electromagnetic drive is achieved, but insulation layers and conductive layers must be provided underneath the micromirror which lead to residual stresses and undesired warping
Solution Approach 1:
The coil body is repositioned from a planar configuration to a three-dimensional configuration that extends laterally to and frames the micromirror. This dimensional change allows the coil to be positioned around the micromirror rather than underneath it, eliminating the need for insulation and conductive layers in the micromirror's support structure.
Solution Approach 2:
The problematic insulation layers and conductive layers are completely removed from the structure. By repositioning the coil body laterally, the design extracts these harmful intermediate layers from the system, directly eliminating the source of residual stresses and warping.
2Ease of manufacture
If the coil body extends laterally to the micromirror, then no insulation layers are required underneath the micromirror, but the magnet must be positioned underneath the coil body within its stray field
Solution Approach 1:
Magnetic flux guides are introduced as intermediary elements between the magnet and the coil body. These flux guides conduct and focus the magnetic field lines from the magnet (positioned underneath the coil) through the coil body, enabling effective electromagnetic drive while maintaining the beneficial lateral coil configuration that eliminates insulation layers.
3Reliability
If magnets are installed laterally to the coil, then electromagnetic drive is achieved, but the installation of the magnet becomes more complex
Solution Approach 1:
Instead of positioning the magnet laterally to the coil as in conventional designs, the invention inverts this arrangement by positioning the magnet underneath the coil body. This inverted configuration, combined with the lateral extension of the coil to frame the micromirror, simplifies magnet installation while maintaining electromagnetic drive function.
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 reduces warping of the micromirror and simplifies magnet installation, enhancing the system's stability and efficiency.
Implementation Method 1
an electromagnetic drive unit for this rotation of the micromirror, which includes a coil body and at least one magnet
Implementation Method 2
The magnet of the electromagnetic drive unit extends underneath the coil body
Implementation Method 3
at least one first and one second magnetic flux guide for conducting the magnetic field lines in the direction of the coil body are situated between the magnets
Data Source
AI summary
A micromechanical oscillation system. The micromechanical oscillation system has a micromechanical oscillating body having at least one micromirror. In addition, the micromechanical oscillation system includes an electromagnetic drive unit which has a coil body and at least one magnet. The coil body essentially extends laterally to the micromirror. The at least one magnet extends underneath the coil body.