Light Deflector with Tilted Elastic Support Surfaces
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Solution Overview
Problem
Existing light deflectors using polygon mirrors or galvanometer mirrors face limitations in improving image resolution due to insufficient antireflection on side surfaces, leading to stray light interference that degrades image quality.
Innovation Solution
A light deflector design featuring a movable plate and elastic support sections with tilted side surfaces, allowing for even light absorbing film formation using typical methods like sputtering, which prevents reflection on these surfaces, and a support member with similar tilted surfaces to enhance light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the side surfaces of the movable plate and torsion bars are formed substantially perpendicular to the upper surface, then the structure is simple and easy to manufacture, but it is difficult to form even antireflection films on the side surfaces, causing light reflection and stray light interference
Solution Approach 1:
The patent applies asymmetry by changing the side surfaces from perpendicular to tilted relative to the upper surface. This asymmetric configuration allows the sputtering process to deposit antireflection films evenly on the side surfaces, solving the problem of uneven film formation while maintaining manufacturing simplicity through a single tilting angle design.
Solution Approach 2:
The patent changes the geometric parameter of the side surfaces from perpendicular (90 degrees) to tilted (specific angle relative to upper surface). This parameter change enables the sputtering process to achieve uniform antireflection film deposition on side surfaces, directly addressing the manufacturing difficulty while reducing stray light through improved film coverage.
2Productivity
If antireflection films are provided only on the upper surface portions, then the manufacturing process is simple, but light reflection occurs on the side surfaces when the movable plate turns, causing stray light interference
Solution Approach 1:
The patent extends the antireflection film coverage from the two-dimensional upper surface to include the three-dimensional side surfaces through tilting. This dimensional extension ensures that light reflecting from side surfaces during plate rotation is also suppressed, eliminating stray light interference while maintaining manufacturing efficiency through the integrated tilted structure.
3Device complexity
If the movable plate and support structures are designed with perpendicular side surfaces, then the device structure is straightforward, but the light reflection prevention function on side surfaces is insufficient
Solution Approach 1:
The patent employs asymmetry by designing side surfaces with a specific tilt angle rather than perpendicular orientation. This asymmetric design simultaneously achieves structural simplicity and improved light reflection prevention, as the tilted surfaces work synergistically with the sputtered antireflection films to suppress stray light while maintaining ease of manufacturing.
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 effectively prevents stray light by ensuring even light absorption on all surfaces, thereby improving image quality and resolution in image display devices.
Implementation Method 1
a light absorbing section having a light absorbing property, wherein the elastic support section has an upper surface, a lower surface, and at least one side surfaces
Implementation Method 2
each of the side surfaces being formed of one or more tilted surfaces existing outside either one of the upper surface and the lower surface
Data Source
AI summary
A light deflector includes: a movable plate; an elastic support section having a first end coupled to the movable plate and adapted to support the movable plate rotatably around a predetermined axis; a support member coupled to a second end of the elastic support section; and a light absorbing section having a light absorbing property, wherein the elastic support section has an upper surface, a lower surface, and at least one side surfaces, each of the side surfaces being formed of one or more tilted surfaces existing outside either one of the upper surface and the lower surface, and the light absorbing section is disposed on the upper surface and the at least one side surfaces of the elastic support section.