Light-Emitting Vehicle Glazing with Crosslinked Polymer Adhesive
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Solution Overview
Problem
Existing light-emitting vehicle glazings, particularly those using light-emitting diodes, face challenges in achieving robustness and optical effectiveness, with existing thermoplastic interlayers complicating assembly and potentially disrupting light guidance.
Innovation Solution
A laminated glazing structure comprising mineral or organic glass sheets with crosslinked polymer adhesive layers and an intermediate thermoplastic film or glass film layer, optimized for light guidance and isolation, with specific refractive index differences and thicknesses to enhance light extraction and mechanical support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a thermoplastic interlayer is used for light guidance, then light transmission is improved, but assembly complexity increases and structural robustness deteriorates
Solution Approach 1:
The patent extracts the light guidance function from the thermoplastic interlayer by introducing a dedicated transparent intermediate layer specifically designed for light transmission. This separates the structural bonding function (performed by the crosslinked polymer adhesive) from the optical guidance function (performed by the intermediate layer), thereby simplifying assembly while maintaining light transmission performance.
Solution Approach 2:
The glazing is segmented into distinct functional layers: outer glass sheets, crosslinked polymer adhesive layers for structural bonding, a transparent intermediate layer for light guidance, and inner glass sheets. This segmentation allows each layer to be optimized for its specific function, improving both assembly simplicity and structural robustness while maintaining optical effectiveness.
2Illumination intensity
If a thermoplastic interlayer is used for light guidance, then light transmission is improved, but structural robustness deteriorates
Solution Approach 1:
The structural robustness function is extracted from the thermoplastic interlayer and assigned to crosslinked polymer adhesive layers. These adhesive layers form strong chemical bonds between glass sheets, providing structural integrity. The thermoplastic material is replaced by a transparent intermediate layer that provides light guidance without compromising structural strength.
Solution Approach 2:
The patent uses composite material structures combining glass sheets with crosslinked polymer adhesive layers and transparent intermediate layers. This composite structure integrates the high strength of glass, the bonding capability of crosslinked polymers, and the optical clarity of the intermediate layer, achieving both structural robustness and light transmission performance.
3Illumination intensity
If the intermediate layer thickness is increased for light guidance, then light extraction is improved, but device complexity increases
Solution Approach 1:
The patent optimizes the thickness of the transparent intermediate layer as a key parameter to balance light extraction efficiency with structural considerations. By carefully selecting the thickness parameter within a specific range, the design achieves effective light guidance without requiring excessively thick layers that would increase device complexity and affect overall glazing performance.
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 robust and optically effective light-emitting glazing with improved light guidance, reduced assembly complexity, and enhanced durability, maintaining high light transmission and minimal haze.
Implementation Method 1
with specific refractive index differences and thicknesses to enhance light extraction and mechanical support
Data Source
AI summary
A light-emitting laminated glazing for a vehicle, includes, between two sheets of glass, an intermediate layer forming a light guide surrounded by layers which have a lower refractive index and at least one of which is adhesive and is made of a crosslinked polymer.