Inclined Transparent Cover for MEMS Scanner Dust Protection
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Solution Overview
Problem
MEMS scanners in scanning projectors face issues with dust accumulation leading to reflectivity deterioration and image quality degradation, especially due to uneven exposure to dust during operation, which affects long-term reliability and accuracy.
Innovation Solution
A MEMS scanner package design featuring a transparent cover unit inclined at a predetermined angle to minimize dust exposure, combined with a magnetically driven scanner and a structured case to reduce optical component misalignment and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the MEMS scanner is operated for long-term use, then productivity is improved, but dust accumulates on the mirror surface causing reflectivity deterioration
Solution Approach 1:
The patent extracts the harmful factor (dust) from the system by introducing a gas flow that actively removes dust particles from the mirror surface, preventing accumulation and maintaining reflectivity during long-term operation
Solution Approach 2:
The system performs self-cleaning through the gas flow mechanism that automatically removes dust from the mirror surface during operation, eliminating the need for external maintenance and ensuring continuous reliability
2Productivity
If the scanner rotates at high speed for scanning, then productivity is improved, but dust exposure increases leading to reflectivity deterioration
Solution Approach 1:
The gas flow rapidly passes through the scanning region, quickly removing dust particles before they can accumulate on the mirror surface, allowing high-speed scanning without increased dust exposure effects
Solution Approach 2:
The gas flow acts as an intermediary between the external environment and the mirror surface, creating a protective flow field that prevents dust particles from settling on the scanning surface
3Reliability
If the scanner package is sealed to prevent dust entry, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses a gas flow field as a flexible protective barrier instead of rigid sealing structures, allowing dust protection through a simplified package design with gas inlet/outlet pathways
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 malfunctions related to erroneous reflection and reflectivity deterioration, maintaining image quality and extending the scanner's operational stability and reliability over time.
Implementation Method 1
a magnetic body for supplying electromagnetic force to the scanner 140
Implementation Method 2
a MEMS scanner including a mirror surface for reflecting light
Data Source
AI summary
A mems scanner package and a scanning projector including the same are disclosed. The MEMS scanner package includes a MEMS scanner including a mirror surface for reflecting light, a magnet disposed behind the MEMS scanner, a lower case having an accommodation space formed therein to accommodate the magnet, an upper case having an opening formed therein to pass light, reflected from the MEMS scanner, therethrough, and a transparent cover unit for covering the opening. The transparent cover unit is embodied as a transparent member, and is coupled to the upper case while being inclined at a predetermined inclination angle with respect to the MEMS scanner.