Polymerizable Monomer Hard Core Structure for LCD Alignment
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Solution Overview
Problem
Liquid crystal display (LCD) panels face challenges in response time and manufacturing efficiency due to the limitations of existing polymer-stabilizing alignment (PSA) technology, which requires improved polymer film performance for liquid crystal molecule alignment.
Innovation Solution
A polymerizable monomer with a hard core structure and specific chemical formula is introduced, allowing for reduced UV light doses and enhanced alignment of liquid crystal molecules, thereby shortening manufacturing time and improving response time in LCD panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymerizable monomers are used in PSA technology, then polymer film can be formed to guide liquid crystal arrangement, but the alignment performance of liquid crystal molecules is insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of the polymerizable monomer by introducing a hard core structure with specific functional groups (carboxyl, hydroxyl, amino, or carbonyl) at defined positions. This structural parameter change enhances the monomer's ability to form polymer films with improved alignment performance, directly resolving the contradiction between alignment quality and manufacturing feasibility.
Solution Approach 2:
The patent creates a composite system by combining the specially structured polymerizable monomer with liquid crystal materials. The monomer's hard core structure forms a polymer film that works synergistically with the liquid crystal molecules, enhancing overall alignment performance while maintaining ease of manufacture through the established PSA process.
2Productivity
If existing PSA technology is used, then polymer film can be formed for alignment, but manufacturing time is extended due to higher UV light dose requirements
Solution Approach 1:
The patent changes the optical and chemical parameters of the polymerizable monomer by incorporating specific functional groups (carboxyl, hydroxyl, amino, carbonyl) that enhance UV light absorption and polymerization efficiency. This parameter change reduces the UV light dose required, thereby shortening manufacturing time while maintaining polymer film formation quality.
Solution Approach 2:
The patent optimizes the photopolymerization process by replacing conventional monomers with ones that have enhanced UV absorption characteristics. This substitution allows the system to achieve effective polymerization with lower UV energy input, reducing manufacturing time and energy consumption without compromising the alignment function.
3Speed
If conventional monomers are used, then polymerization can proceed, but response time of liquid crystal molecules is slow
Solution Approach 1:
The patent modifies the molecular structure parameters of the monomer by introducing a hard core structure with specific functional groups that enhance both polymerization efficiency and alignment quality. This dual-parameter optimization ensures that the polymer film formed provides superior alignment fields, thereby reducing liquid crystal molecule response time while maintaining high alignment reliability.
Solution Approach 2:
The patent develops a composite system where the specially structured monomer forms a polymer film that creates enhanced alignment fields. This composite approach—combining the monomer's hard core structure with liquid crystal materials—produces a synergistic effect that improves both alignment quality and response time simultaneously.
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 polymerizable monomer reduces the UV light dose required for polymerization, lowers manufacturing costs, and significantly enhances the alignment and response rate of liquid crystal molecules, resulting in faster response times and reduced energy consumption in LCD panels.
Implementation Method 1
an energy source (such as a UV light or a heating source) is applied thereto for polymerizing the polymerizable monomers into a polymer film
Data Source
AI summary
A polymerizable monomer adopted to a display panel is represented as following chemical formula:wherein, m≧0; “Z” is selected from oxygen, sulfur, carbonyl, caroboxyl, methyoxy, methylthio, thio, ethenylcarbonyl, carbonylethenyl, difluoromethoxy, difluoro methylthio, ethyl, difluoroethane, 1,2 difluoroethane, vinylene, difluoroethenylene, ethynyl, or single bond. “X1” and “X2” are independently selected from oxygen, sulfur, methyoxy, carbonyl, caroboxyl, -carbamoyl, methylthio, ethenylcarbonyl, carbonylethenyl, or single bond. “Sp1” and “Sp2” are independently a spacer or single bond. “P1” and “P2” are independently a polymerizable group.