Liquid Crystal Composition Self-Aligned Compound Uniform Spreading
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Solution Overview
Problem
Liquid crystal display devices face issues with liquid crystal drip spots during manufacturing due to non-uniform spreading of the liquid crystal composition, and the need for an additional alignment layer complicates the manufacturing process.
Innovation Solution
A liquid crystal composition comprising specific liquid crystal compounds, self-aligned compounds, and reactive mesogens, which allows for the alignment of liquid crystal molecules without an additional alignment layer, ensuring uniform spreading and reducing spot formation by controlling the interaction energies and content ratios of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an additional alignment layer is used to align liquid crystal molecules, then alignment precision is improved, but device complexity and manufacturing process complexity increase
Solution Approach 1:
The patent removes the separate alignment layer from the display device structure by incorporating alignment functionality directly into the liquid crystal composition through self-aligned compounds. This extraction of the alignment layer function eliminates the need for an additional structural layer while maintaining alignment precision.
Solution Approach 2:
The patent combines the alignment function with the liquid crystal composition by adding self-aligned compounds (0.05-3 wt%) to the liquid crystal mixture. This merging integrates multiple functions (liquid crystal display and molecular alignment) into a single material system, reducing device complexity while preserving alignment capability.
2Productivity
If liquid crystal composition is applied during manufacturing, then productivity is improved, but liquid crystal drip spots are generated due to non-uniform spreading
Solution Approach 1:
The patent modifies the chemical composition parameters of the liquid crystal mixture by incorporating specific self-aligned compounds (0.05-3 wt%) and reactive mesogens (0.05-3 wt%). These parameter changes alter the spreading characteristics and intermolecular interactions, enabling uniform distribution during the manufacturing process while preventing drip spot formation.
Solution Approach 2:
The patent creates a composite liquid crystal composition by combining multiple liquid crystal compounds with self-aligned compounds and reactive mesogens. This composite material exhibits improved spreading uniformity and reduced drip spot tendency compared to conventional liquid crystal compositions, maintaining high manufacturing efficiency.
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 prevents liquid crystal drip spots and simplifies the manufacturing process by ensuring uniform alignment and spreadability of the liquid crystal composition, enhancing the display device's performance and manufacturing efficiency.
Implementation Method 1
an absolute value of average interaction energy between the self-aligned compound and one of the liquid crystal compounds represented by Chemical Formulas 1-1 to 1-3 may be less than an absolute value of average interaction energy between the self-aligned compound and one of the liquid crystal compounds represented by Chemical Formulas 1-4 to 1-8
Implementation Method 2
ensuring uniform spreading and reducing spot formation by controlling the interaction energies and content ratios of these components
Data Source
AI summary
A liquid crystal composition includes: at least one liquid crystal compound selected from the group consisting of Chemical Formulas 1-1 to 1-8; at least one self-aligned compound selected from the group consisting of Chemical Formulas 2-1 and 2-2; and at least one reactive mesogen selected from the group consisting of Chemical Formulas 3-1 to 3-5. Compositions and devices constructed therewith are capable of ameliorating liquid crystal drip spots that typically occur in a manufacturing process. In addition, the display devices using the composition do not require an additional alignment layer, which simplifies manufacturing.