Luminous Automotive Glazing with Protective Adhesive Strip
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Solution Overview
Problem
Existing luminous automotive glazings with light-emitting diodes face issues with the transparent adhesive losing its barrier capabilities over time, leading to uncontrolled variations in light color and potential water infiltration, especially under climatic cycles.
Innovation Solution
A luminous automotive glazing design featuring a laminated structure with a profiled bead and a protective adhesive strip that maintains a seal-tight barrier between the light-emitting diodes and the edge face, using a polymeric material for the bead and a dielectric adhesive strip to prevent contact with the adhesive and ensure light emission without hindrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If transparent adhesive is used to bond diodes to the edge face, then ease of manufacture is improved, but reliability deteriorates over time as the adhesive loses barrier capacities under climatic cycles
Solution Approach 1:
The bonding system is divided into two distinct functional parts: a transparent adhesive for initial bonding and positioning, and a separate protective adhesive strip applied afterward to provide long-term barrier protection. This segmentation allows each material to be optimized for its specific function without compromise.
Solution Approach 2:
The transparent adhesive is applied first to bond the diodes in their correct positions, establishing the initial structure. Then the protective adhesive strip is applied as a preliminary protective measure before the assembly undergoes climatic cycling, ensuring barrier protection is in place before environmental stress occurs.
2Ease of operation
If transparent adhesive is used between diodes and edge face, then ease of operation is improved during assembly, but object-affected harmful factors increase due to uncontrolled color variation and potential water infiltration
Solution Approach 1:
The protective adhesive strip acts as an intermediary barrier between the diode assembly and the external environment. It mediates the protection function, blocking water and preventing harmful climatic factors from reaching the adhesive and diodes, while allowing the transparent adhesive to perform its bonding function without interference.
3Device complexity
If adhesive is used to bond diodes to edge face, then device complexity is reduced, but manufacturing precision deteriorates due to uncontrolled light emission variations
Solution Approach 1:
Different regions of the bonding system are assigned different qualities: the transparent adhesive provides optical transparency and initial bonding in the diode contact region, while the protective adhesive strip provides barrier protection in the peripheral regions. This local differentiation ensures each area performs its specific function optimally.
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 effectively protects the light-emitting diodes, maintains optical properties, and prevents light degradation or infiltration, ensuring consistent light emission and improved durability.
Implementation Method 1
The plurality of inorganic light-emitting diodes are configured to emit one or more visible light rays that are guided in the interior glazing, before light extraction with a light-extracting system
Data Source
AI summary
A luminous laminated automotive glazing with diodes peripherally on a diode carrier facing the edge face of the interior glass equipped with a recess, a profiled bead and a protective adhesive strip between the diode carrier and the bead.