Temperature-Controlled Switch Element Using Liquid Crystalline Gel
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Solution Overview
Problem
Current smart window technologies fail to automatically adapt to environmental conditions, require electrical connections, and are prone to damage due to liquid layers, making them inefficient and difficult to install and maintain.
Innovation Solution
A temperature-controlled switching element composed of a mixture of liquid-crystalline compounds and polymers, which changes its light transmission properties based on temperature, eliminating the need for electrical control and enhancing durability by using a gel-like switching layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrically switchable devices are used to control light passage, then light transmission can be regulated, but electrical connections are required which increase installation effort and maintenance requirements
Solution Approach 1:
The patent replaces electrical control systems with a thermally activated liquid crystalline medium that automatically changes its light transmission properties in response to temperature changes. This eliminates the need for electrical connections, control wiring, and power sources, significantly simplifying the device structure while maintaining light regulation functionality.
Solution Approach 2:
The liquid crystalline medium performs the switching function autonomously based on environmental temperature conditions without requiring external control signals or power supply. The system self-regulates light passage through the phase transition of the liquid crystalline material, eliminating the need for complex electrical control infrastructure.
2Extent of automation
If a liquid layer containing liquid crystalline medium is used for temperature-reactive switching, then voltage-free operation is achieved, but the device becomes more susceptible to damage and liquid can be pushed out
Solution Approach 1:
The patent creates a composite material system by combining liquid crystalline compounds with monomer compounds that polymerize to form a gel-like network. This composite structure maintains the temperature-responsive properties of the liquid crystalline medium while the polymer network provides structural integrity, preventing leakage and increasing mechanical stability.
Solution Approach 2:
The patent changes the physical state of the liquid crystalline medium from a free-flowing liquid to a gel-like state through polymerization. This parameter change maintains the material's responsiveness to temperature changes while fundamentally improving its mechanical properties, including resistance to damage and prevention of material ejection.
3Stability of the object's composition
If polymer network liquid crystal mixtures are used, then the switching layer becomes more stable, but the mixture becomes cloudy or light-scattering
Solution Approach 1:
The patent carefully controls the local composition and structure of the polymer network within the liquid crystalline medium. By optimizing the monomer selection, polymerization conditions, and crosslinking density, the invention achieves a homogeneous gel structure that maintains optical clarity while providing the desired mechanical stability and preventing light scattering.
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 energy-efficient, automatically adaptive, and aesthetically pleasing smart windows that can be easily installed and maintained, with adjustable light transmission to optimize energy usage and comfort in varying climatic conditions.
Implementation Method 1
The switching between a state with higher light transmission and a state with lower light transmission is achieved by a phase transition of the liquid crystalline medium from a nematic state to an isotropic state
Implementation Method 2
temperature-reactive devices are disclosed which contain a liquid crystalline medium in a layer between two polarizers. The switching between a state with higher light transmission and a state with lower light transmission is achieved by a phase transition of the liquid crystalline medium
Data Source
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AI summary
The invention relates to a temperature-controlled switch element for regulating light transmission. The invention further relates to a mixture comprising at least one liquid crystalline bond, at least one monomer bond, which represents a mono-functional bond, and at least one monomer bond, which represents a multi-functional bond. The invention further relates to the use of the cited mixture for producing the switch element according to the invention.