Composite Dustproof Member for Projector Light Source Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional soft material dustproof members in projectors can twist during assembly, leading to dust accumulation on optical instruments, reducing light quality and causing color unevenness.
Innovation Solution
A light source unit with a frame-shaped dustproof member featuring a packing portion and a support frame, where the packing portion is made of a soft material and the support frame is harder, is used to securely seal the gap between the device holder and the holder case, preventing dust entry and reducing twisting during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a soft material dustproof member is used, then dustproofing function is provided, but the member twists during assembly causing dust to adhere to optical instruments
Solution Approach 1:
The dustproof member is constructed as a composite structure combining a soft packing portion (made of elastic material) and a rigid support frame (made of resin or metal). The soft packing portion provides dustproofing by deforming to seal gaps, while the rigid support frame prevents twisting during assembly and maintains structural stability. This composite design resolves the contradiction between needing softness for sealing and rigidity for assembly stability.
Solution Approach 2:
Different portions of the dustproof member have different material properties tailored to their specific functions: the packing portion is made soft and elastic for dustproofing, while the support frame is made rigid for structural stability. This local differentiation of material properties allows each part to optimize its performance without compromising the overall structure.
2Object-affected harmful factors
If a soft material dustproof member is used, then dustproofing function is provided, but light quantity reduction and color unevenness occur due to dust on optical instruments
Solution Approach 1:
The composite structure with rigid support frame and soft packing portion effectively prevents dust entry, thereby protecting optical instruments from dust accumulation. This maintains proper light transmission and prevents the light quantity reduction and color unevenness that would otherwise occur.
3Stability of the object's composition
If a frame-shaped dustproof member with support frame is used, then assembly stability is improved, but device complexity increases
Solution Approach 1:
The dustproof member is divided into two functional segments: the packing portion for dustproofing and the support frame for structural stability. This segmentation allows each part to be optimized independently while working together as an integrated component, managing complexity through functional division.
Solution Approach 2:
The packing portion and support frame are combined into a single integrated dustproof member that performs both dustproofing and structural functions simultaneously. This merging reduces the need for separate components and simplifies the overall assembly process despite the enhanced functionality.
Data Source
AI summary
A light source unit according to an embodiment includes a device holder including a semiconductor light emitting device; a holder case including an opening where the device holder is disposed; and a dustproof member including a frame-shaped dustproof portion disposed in a gap between an outer periphery of the device holder and a wall surface of the opening.