Photo-alignment Material for LCD Panels Without Alignment Film
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Solution Overview
Problem
The existing manufacturing process of liquid crystal display panels is complicated, and the quality of the products is poor due to the use of expensive alignment films and severe coating process requirements, leading to issues with polymerization uniformity and residual monomer amounts.
Innovation Solution
A photo-alignment material with a specific chemical structure, including an orientation anchor group, a linking group, a photosensitive group with chalcone, and an alignment group, is used to induce a pre-tilt angle in liquid crystal molecules without the need for an alignment film or etched pixel electrodes, simplifying the process and improving product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an alignment film is used to achieve large viewing angle, then the viewing angle is improved, but the manufacturing process becomes complicated and costs increase
Solution Approach 1:
The patent extracts and eliminates the alignment film from the liquid crystal display structure. Instead of using a separate alignment film layer, the alignment function is integrated into the liquid crystal composition itself through photo-alignment monomers that can be polymerized to provide alignment functionality, thereby removing the need for the alignment film and simplifying the manufacturing process
Solution Approach 2:
The patent merges the alignment function with the liquid crystal composition by incorporating photo-alignment monomers into the liquid crystal material. This combination allows the liquid crystal to simultaneously serve as both the display medium and the alignment layer, eliminating the need for separate alignment films and reducing manufacturing complexity
2Adaptability or versatility
If an alignment film is used to achieve large viewing angle, then the viewing angle is improved, but the manufacturing cost increases
Solution Approach 1:
The patent removes the expensive alignment film from the system and replaces it with photo-alignment monomers that are already present in the liquid crystal composition, thereby eliminating the need to purchase and apply separate alignment film materials, reducing manufacturing costs
Solution Approach 2:
The liquid crystal composition is designed to perform multiple functions: it serves as both the display medium and the alignment layer through the incorporated photo-alignment monomers. This multi-functionality eliminates the need for separate alignment film materials, reducing overall material costs
3Manufacturing precision
If severe coating process requirements are applied to alignment film, then alignment quality is improved, but polymerization uniformity deteriorates due to residual monomer
Solution Approach 1:
The photo-alignment monomers are designed to polymerize automatically under UV irradiation without requiring severe coating process controls. The monomers self-organize and polymerize in place, providing alignment functionality while achieving uniform polymerization and minimizing residual monomer content, thus improving both alignment quality and polymerization uniformity
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 simplifies the manufacturing process, reduces costs, and enhances the quality of liquid crystal display panels by allowing for the production of panels with large viewing angles while maintaining ideal display effects.
Implementation Method 1
the monomer which can be polymerized under the irradiation of ultraviolet light should be added to liquid crystal molecules to form a specific pre-tilt angle
Data Source
AI summary
The present disclosure relates to a photo-alignment material, a liquid crystal display panel, and a manufacturing method thereof. The chemical structural formulas of photo-alignment material includes an orientation anchor group, a linking group, a photosensitive group with one or more photosensitive cyclohexanone, and an alignment group with a linear or branched alkyl having 3-15 carbon atoms; wherein the orientation anchor group, the linking group, the photosensitive group and the alignment group are connected successively. Through the above-mentioned manner, the present disclosure can simplify the manufacturing process of the liquid crystal display panel, and improve the product quality.