Profiled Bead LED Automotive Glazing
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Solution Overview
Problem
Existing laminated automotive glazings with integrated light-emitting diodes face issues with the aging of transparent internal sealing adhesives, which can lead to loss of diode positioning and increased costs due to the need for more resistant, yet expensive, materials.
Innovation Solution
A profiled bead is used to protect the light-emitting diode, with an exterior and interior lip forming a space devoid of solid material between the diode and the glass edge, preventing light loss and reducing the risk of adhesive failure, and an additional protective profile can be applied for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent internal sealing adhesive is used to position the light-emitting diode, then the diode can be positioned and secured, but the adhesive loses its ability to maintain positioning over time due to aging and climatic cycles
Solution Approach 1:
The patent removes the transparent internal sealing adhesive from the system by creating a space devoid of solid material between the light-emitting diode and the interior glass sheet edge. The profiled bead structure provides mechanical positioning and protection without requiring adhesive bonding, thereby eliminating the aging problem associated with adhesive degradation over time.
Solution Approach 2:
The profiled bead is divided into distinct functional zones: an exterior lip for sealing, a body forming a protective cavity, and an interior lip for positioning. This segmentation allows each portion to perform its specific function independently, with the interior lip providing precise diode positioning without relying on adhesive materials.
2Reliability
If more resistant material is used for the internal sealing adhesive to prevent aging, then the positioning stability improves, but the material becomes more expensive and less transparent
Solution Approach 1:
The patent eliminates the need for expensive aging-resistant adhesive materials by removing the adhesive entirely from the system. The profiled bead structure provides durable positioning and protection through its rigid plastic construction, avoiding the need to invest in costly specialized adhesives while maintaining or improving optical transparency.
3Reliability
If transparent internal sealing adhesive is used between the diode and glass sheet, then the diode is positioned, but light transmission is reduced due to the adhesive layer
Solution Approach 1:
The patent removes the adhesive layer that blocks light transmission and replaces it with a air gap formed by the profiled bead structure. The interior lip of the bead provides positioning while the absence of solid material between the diode and glass sheet maximizes light transmission efficiency.
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 reliable, inexpensive, and efficient lighting system with improved insulation and protection against diode failure, eliminating the need for expensive, aging-resistant adhesives and ensuring consistent light transmission.
Implementation Method 1
at least one light-emitting diode located under a peripheral edge of said interlayer face of said exterior glass sheet and having an emitting face
Implementation Method 2
a body located between said exterior lip and said interior lip, with said body being located a distance away from said emitting face of the light-emitting diode and not in contact with said emitting face
Data Source
AI summary
A glazing, and in particular an automotive glazing, includes a laminated glazed element including an exterior glass sheet, an interior glass sheet and a plastic interlayer sheet that is located between the two glass sheets and including at least one light-emitting diode that is located under a peripheral edge of the interlayer face of the exterior glass sheet, wherein the emitting face of the light-emitting diode is located facing at least a part of the edge face of the interior glass sheet and wherein the glazing includes a profiled bead including an exterior lip an interior lip and a body, with the body being located a distance away from, and not in contact with, the emitting face of the light-emitting diode.