Liquid Crystal Glazing Insulating Polymer Cabling
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Solution Overview
Problem
Existing electrically controllable liquid-crystal glazings with variable scattering properties are not long-lasting and require improvements in reliability and cost-effectiveness.
Innovation Solution
A multiple glazing system with a polymer-stabilized liquid crystal layer between two glass sheets, incorporating transparent spacers and electrically conductive electrodes, where the electrical cabling is reinforced with a sheathless cable and insulating polymer material to enhance mechanical strength and durability, and a water-impermeable seal is applied to prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical cabling is directly connected to electrodes in liquid-crystal multiple glazing, then electrical connection is achieved, but mechanical strength is reduced and electrical safety is compromised
Solution Approach 1:
The patent introduces an electrically insulating polymer material as an intermediary substance between the electrical cabling and the glass surface. This mediator provides both electrical insulation for safety and mechanical anchoring for strength, allowing the cable to be embedded in grooves and secured with adhesive while preventing direct electrical contact with the glass and liquid crystal layers.
2Ease of manufacture
If glass sheets are sealed with adhesive gasket, then assembly is simplified, but water impermeability is insufficient in wet environments
Solution Approach 1:
The patent employs a composite sealing approach combining adhesive gasket material with electrically insulating polymer material that provides water impermeability. The insulating polymer serves dual functions as both electrical insulation and waterproof sealing, creating a composite barrier that prevents moisture ingress while maintaining assembly simplicity.
3Illumination intensity
If liquid crystal layer thickness is increased, then optical properties are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the electrically insulating polymer material as a flexible thin film that can be applied in a molten or adhesive state to fill grooves and provide uniform insulation. This flexible film approach allows for thickness compensation and maintains consistent liquid crystal layer spacing without requiring extremely precise manufacturing tolerances, as the polymer can conform to slight variations in surface geometry.
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 mechanically stronger and electrically safe glazing with improved reliability and reduced material costs, while maintaining variable optical properties and enhanced protection against moisture, suitable for various applications including wet environments.
Implementation Method 1
a layer of liquid crystals in a polymer material (or a polymer matrix), which layer of liquid crystals alternates reversibly between a transparent state and a translucent state by application of an alternating electric field
Data Source
AI summary
A liquid-crystal multiple glazing can have a first glass sheet and a second glass sheet held by a gasket referred to as the contact gasket. In some examples, the multiple glazing includes first and second electrodes with first and second electricity supply zones and a liquid-crystal layer with spacers having a thickness of between 5 and 15 μm. Additionally, the first glass sheet may protrude by a first protruding side and include the first electricity supply zone. Further, the glazing may have electrical cabling with a first cabling input with a first electrically insulating polymer material.