Liquid Crystal Composition Aligning Agent
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Solution Overview
Problem
The existing methods for manufacturing liquid crystal display devices involve the use of hazardous organic solvents and high-temperature sintering processes, which are environmentally harmful and decrease productivity.
Innovation Solution
A method that omits the conventional liquid crystal alignment film forming process by using a liquid crystal composition containing specific compounds represented by Formulas 1 and 2, which aligns liquid crystals between electrodes and stabilizes them with reactive mesogen polymer projections, allowing for alignment without coating, drying, and sintering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional liquid crystal alignment film forming process is used (coating, drying, sintering), then liquid crystal alignment is achieved, but productivity decreases and environmental harm increases due to hazardous solvents and high-temperature processes
Solution Approach 1:
The patent extracts and eliminates the separate alignment film forming process (coating, drying, sintering) from the conventional manufacturing workflow. Instead, the alignment function is integrated directly into the liquid crystal composition through aligning agents that work in-situ, removing the need for the harmful multi-step film formation process while maintaining alignment reliability
Solution Approach 2:
The patent merges the alignment function with the liquid crystal composition itself by incorporating aligning agents (compounds of Formula 1) and reactive mesogens (Formula 2) directly into the liquid crystal mixture. This combination allows the liquid crystal to self-align upon filling the cell, eliminating the need for a separate alignment film and its associated harmful processes
2Reliability
If conventional alignment film manufacturing is used, then liquid crystal alignment is achieved, but environmental harm and health risks increase due to hazardous organic solvents
Solution Approach 1:
The patent converts the harmful conventional process into a beneficial alternative by replacing hazardous organic solvents and high-temperature sintering with a benign liquid crystal composition containing aligning agents. The aligning agents (Formula 1) and reactive mesogens (Formula 2) provide the necessary alignment function without requiring harmful chemicals or extreme temperatures, thus eliminating environmental and health hazards while maintaining alignment reliability
3Reliability
If conventional alignment film manufacturing is used, then liquid crystal alignment is achieved, but the process complexity and time consumption increase
Solution Approach 1:
The patent extracts and removes the complex multi-step alignment film forming process (coating, drying, sintering) from the manufacturing workflow. The alignment function is instead achieved through a simple liquid crystal composition containing aligning agents that automatically align the liquid crystals upon cell filling, dramatically reducing process complexity and time consumption while maintaining alignment quality
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
This method improves processability and productivity while being environmentally friendly and safer for human health, as it eliminates the need for harmful solvents and high-temperature processes, and enhances the stability and alignment of liquid crystals.
Implementation Method 1
a liquid crystal layer including a liquid crystal compound, wherein the liquid crystal layer is adsorbed on a surface of at least one of the first electrode and the second electrode to align the liquid crystal compound
Implementation Method 2
a polymer of reactive mesogen including two or more compounds represented by Formula 2, wherein the polymer of reactive mesogen is adsorbed on the surface of at least one of the first electrode and the second electrode to align the liquid crystal compound
Data Source
AI summary
A liquid crystal composition including: a liquid crystal compound and a liquid crystal aligning agent including at least one compound represented by Formula 1:wherein in the Formula 1, X—*, *-L1-*, *-L2-*, *-L3-*, *—C—*, *—R—*, *—Y, n1, n2, and m are the same as defined in the specification.