95 µm Light-Emitting Fiber for Woven Textiles
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Solution Overview
Problem
Conventional light-emitting plastic optical fibers are inflexible and fragile, making it difficult to process them into woven or knitted fabrics while maintaining their light-emission properties.
Innovation Solution
A light-emitting fiber structure with a two-layer core and cladding, using polymethyl methacrylate for the core and fluorine resin for the cladding, with specific refractive index and thickness ratios, and a fiber diameter of 95 µm or less, to enhance flexibility and processability into woven or knitted fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional light-emitting plastic optical fibers are used, then light-emission properties are maintained, but flexibility and processability into woven or knitted fabrics deteriorate
Solution Approach 1:
The patent reduces the fiber outer diameter to 95 µm or less (specifically 40-90 µm), which fundamentally changes the physical parameters of the optical fiber. This size reduction directly improves flexibility and bendability while maintaining light-emission properties through optimized core-cladding structure design
Solution Approach 2:
The patent uses a composite structure with polymethyl methacrylate (PMMA) core and fluorine resin cladding. This material combination provides both mechanical flexibility and optical performance, allowing the fiber to be processed into woven or knitted fabrics while maintaining light-emission capabilities
2Ease of manufacture
If conventional light-emitting plastic optical fibers are used, then light-emission properties are maintained, but processability into fiber structures deteriorates
Solution Approach 1:
The reduced outer diameter of 95 µm or less makes the fibers sufficiently flexible to be processed into woven or knitted fabric structures. The thin dimensions allow standard textile processing techniques to be applied while preserving optical functionality
Solution Approach 2:
The patent optimizes the local structure by creating a specific core-cladding configuration where the core diameter is 20-80 µm and cladding thickness is 10-35 µm. This local structural optimization ensures light-emission properties are maintained even when the overall fiber is made thin for better processability
3Ease of operation
If fiber diameter is reduced to improve flexibility, then bending properties improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a precise fiber outer diameter range of 95 µm or less (optimally 40-90 µm) with controlled core and cladding dimensions. This parameter specification balances bending performance with manufacturability, providing clear manufacturing targets that ensure both flexibility and production feasibility
Solution Approach 2:
The patent ensures uniform distribution of core and cladding materials with consistent layer thicknesses throughout the fiber structure. This homogeneity in material distribution simplifies manufacturing control and ensures consistent optical and mechanical properties across all fibers
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 provides a highly flexible and processable light-emitting fiber structure with improved bending properties and light-emission performance, suitable for various applications including lighting fixtures and medical uses.
Implementation Method 1
optical fiber light guides that use optical fibers, each comprised of a core and a cladding, for lighting applications... Light entering one end of the light guide propagates through the core and is leaked from the cladding
Data Source
AI summary
A light-emitting fiber includes a core and a cladding and is configured to emit light through a side surface of the fiber. A resin used for the core is at least one selected from the group consisting of polymethyl methacrylate, polymethyl methacrylate copolymers, polystyrene, polycarbonates, polyorganosiloxanes, and norbornene, and a resin used for the cladding is fluorine resin. The light-emitting fiber has a fiber diameter of 95 µm or less.