Liquid Crystal Composition with Reactive Mesogens for Alignment Film Elimination
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Solution Overview
Problem
Conventional liquid crystal display device manufacturing processes are inefficient and harmful due to the need for environmentally hazardous organic solvents and high-temperature sintering in forming liquid crystal alignment films.
Innovation Solution
A method of manufacturing liquid crystal display devices that omits the conventional liquid crystal alignment film forming process by using a liquid crystal composition with a liquid crystal aligning agent and reactive mesogens, which are adsorbed onto electrodes and aligned using ultraviolet irradiation, eliminating the need for organic solvents and high-temperature sintering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional liquid crystal alignment film is formed using organic polymer compounds and environmentally hazardous organic solvents followed by drying and high-temperature sintering, then the liquid crystal alignment function is achieved, but the manufacturing process becomes complex, productivity decreases, and harmful effects on humans and environment occur
Solution Approach 1:
The patent combines the liquid crystal compound and liquid crystal aligning agent into a single liquid crystal composition that is applied simultaneously to both substrates. This eliminates the separate alignment film formation process, reducing manufacturing steps and improving productivity while maintaining the alignment function through the self-organizing properties of the liquid crystal molecules.
Solution Approach 2:
The invention extracts and eliminates the harmful organic solvents and high-temperature sintering step from the conventional process. By using a low-viscosity liquid crystal composition that can be applied and cured at lower temperatures, the process removes the need for environmentally hazardous materials and energy-intensive heating, thereby improving productivity and reducing harm.
2Reliability
If a conventional liquid crystal alignment film is formed using organic polymer compounds and environmentally hazardous organic solvents followed by drying and high-temperature sintering, then the liquid crystal alignment function is achieved, but the manufacturing process becomes long and complex
Solution Approach 1:
The patent merges the alignment film formation step with the liquid crystal application step by using a composition containing both liquid crystal compounds and aligning agents. This single-step process eliminates the separate coating, drying, and sintering steps, significantly simplifying the manufacturing process while ensuring proper liquid crystal alignment through the inherent properties of the liquid crystal molecules.
Solution Approach 2:
The invention extracts and removes the complex high-temperature sintering process and environmentally hazardous organic solvents from the manufacturing流程. By using a low-viscosity composition that can be cured at lower temperatures, the process becomes simpler and more straightforward, reducing both time and complexity while maintaining alignment functionality.
3Reliability
If a conventional liquid crystal alignment film is formed using organic polymer compounds and environmentally hazardous organic solvents followed by drying and high-temperature sintering, then the liquid crystal alignment function is achieved, but harmful effects on humans and environment occur
Solution Approach 1:
The invention extracts and eliminates environmentally hazardous organic solvents and high-temperature sintering processes from the manufacturing流程. By using a low-viscosity liquid crystal composition that can be applied and cured at lower temperatures, the process removes harmful substances and energy-intensive steps, thereby protecting human health and the environment while maintaining the liquid crystal alignment function.
Solution Approach 2:
The patent changes the physical and chemical parameters of the alignment formation process by using a low-viscosity liquid crystal composition that can be cured at lower temperatures. This parameter change eliminates the need for high-temperature sintering and environmentally hazardous solvents, reducing harmful effects on humans and the environment while achieving the desired alignment function.
4Reliability
If a conventional liquid crystal alignment film is formed using organic polymer compounds and environmentally hazardous organic solvents followed by drying and high-temperature sintering, then the liquid crystal alignment function is achieved, but processability is reduced
Solution Approach 1:
The patent merges the liquid crystal application and alignment film formation into a single step by using a composition containing both liquid crystal compounds and aligning agents. This simplifies the manufacturing process, making it easier to implement and reducing the number of processing steps required, thereby improving processability while maintaining alignment functionality.
Solution Approach 2:
The invention extracts and removes the complex high-temperature sintering process and environmentally hazardous organic solvents from the manufacturing流程. By using a low-viscosity composition that can be cured at lower temperatures, the process becomes simpler and more straightforward, improving ease of manufacture and processability while maintaining alignment functionality.
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 approach improves processability and productivity while being environmentally friendly and reducing human health risks, enabling the use of flexible organic polymer substrates.
Implementation Method 1
a liquid crystal aligning agent containing at least one compound represented by Formula 1... which are adsorbed onto electrodes
Implementation Method 2
irradiating the liquid crystal cell with ultraviolet rays when a voltage is applied to the liquid crystal cell
Data Source
AI summary
A liquid crystal composition including: a liquid crystal compound and a liquid crystal aligning agent containing at least one compound represented by Formula 1:wherein in the Formula 1, X—*, *-L1-*, *-L2-*, *-L3-*, *—C—*, *—R—*, Y—*, n1, n2, and m is the same as defined in the specification.