Optical Module Folded Frame Reduces Inertia and Noise
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Solution Overview
Problem
Optical modules require reduction in volume to minimize space usage and noise generation during operation, as larger volumes result in higher moments of inertia and increased noise levels.
Innovation Solution
An optical module design featuring a base, a first frame with folded edges, and a driving assembly that abuts against the inner folded edges to reduce size and improve stability, allowing the driving assembly to be closer to the optical element, thereby reducing the overall module size and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical module volume is reduced, then the moment of inertia and noise are reduced, but the driving assembly cannot be positioned close enough to the optical element
Solution Approach 1:
The frame utilizes a folded edge structure that transforms the spatial arrangement from a conventional linear layout to a three-dimensional folded configuration. This dimensional transformation allows the driving assembly to be positioned adjacent to the optical element through the folded edge geometry, achieving close positioning while maintaining a compact overall module volume.
Solution Approach 2:
The driving assembly is nested within the folded edge structure of the frame, with the frame body folding back to create a compact configuration where the driving assembly can be positioned close to the optical element. This nesting approach allows multiple components to occupy overlapping or adjacent spaces efficiently, reducing the overall module volume while maintaining functional proximity.
2Volume of moving object
If the optical module volume is reduced, then the noise during operation is reduced, but the structural stability may be compromised
Solution Approach 1:
The frame is segmented into multiple portions including a first frame body and folded edges, creating distinct structural zones. This segmentation allows each portion to be optimized for its specific function - the main body provides overall support while the folded edges create rigid geometric structures that enhance stability. The segmented design enables the compact volume while maintaining structural integrity through distributed load paths.
Solution Approach 2:
The folded edges create geometric curvature and angular structures that provide inherent structural rigidity. The folded configuration transforms flat surfaces into three-dimensional geometric forms that resist deformation more effectively, enhancing the frame's structural stability while occupying minimal space. The angular geometry of the folded edges creates rigid joints that maintain positional stability.
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 design effectively reduces the optical module's size by 7-5% in width and length, lowering the moment of inertia by 14% and the thrust force required to achieve swing speed, resulting in reduced vibration noise during operation.
Implementation Method 1
the first driving assembly is configured to drive the first body to swing relative to the base by taking the first shaft portion as a rotating shaft
Data Source
AI summary
The invention provides an optical module and a projection apparatus. The optical module includes a base, a first frame, an optical element, and at least one first driving assembly. The first frame is disposed in the base and includes a first body and a pair of first shaft portions, the first shaft portion extending outward from the first body, and the first body including a pair of first inner folded edges. The optical element is disposed between the pair of first inner folded edges. The first driving assembly and the optical element abut against two opposite sides of one of the first inner folded edges, respectively, and the first driving assembly is configured to drive the first body to swing relative to the base by taking the first shaft portion as a rotating shaft.