Post Spacer Material for Liquid Crystal Display Panels
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Solution Overview
Problem
Traditional liquid crystal display panels experience light leakage and instability in the liquid crystal cell gap due to the material properties of post spacers, which affect the alignment of liquid crystal molecules and lead to display issues, especially in flexible devices where the spacers may peel off.
Innovation Solution
The use of post spacers with specific materials that can chemically cross-link with alignment layers and generate hydrogen bonds or intermolecular forces with liquid crystal molecules, ensuring consistent alignment and increased adhesive strength, thereby reducing light leakage and maintaining stable cell gaps even in flexible panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional resin type materials are used for post spacers, then the liquid crystal cell gap can be controlled, but light leakage occurs due to misalignment of liquid crystal molecules around the post spacers
Solution Approach 1:
The patent changes the chemical composition parameters of the post spacer material from traditional resin types to a specific copolymer composition (containing carboxyl groups and hydroxyl groups). This parameter change enables the material to form hydrogen bonds with liquid crystal molecules, aligning them properly and eliminating light leakage while maintaining cell gap control precision.
Solution Approach 2:
The patent uses a composite material approach by selecting a copolymer containing both carboxyl groups and hydroxyl groups in specific proportions. This composite material structure provides dual functionality: cell gap control through physical presence and light leakage prevention through chemical interaction (hydrogen bonding) with liquid crystal molecules.
2Manufacturing precision
If traditional resin type materials are used for post spacers, then the liquid crystal cell gap can be controlled, but the post spacers may peel off in flexible devices due to insufficient adhesive force
Solution Approach 1:
The patent changes the chemical parameters of the post spacer material to include reactive functional groups (carboxyl and hydroxyl groups) that can form strong hydrogen bonds and potentially covalent interactions with the alignment layers. This parameter change dramatically increases the adhesive force, preventing peeling in flexible devices while maintaining cell gap control functionality.
3Ease of manufacture
If traditional resin type materials are used for post spacers, then the structure is simple and easy to manufacture, but the alignment of liquid crystal molecules is disrupted causing display defects
Solution Approach 1:
The patent changes the chemical parameters of the post spacer material to include specific functional groups that interact favorably with liquid crystal molecules. Despite this material complexity, the manufacturing process remains relatively simple (spray coating), demonstrating that parameter changes in material composition can achieve better alignment without significantly complicating the manufacturing process.
Data Source
AI summary
The present disclosure discloses a post spacer, which is applied to a liquid crystal display panel. The post spacer has a material having a structure as represented by Formula 1, wherein X includes at least one of groups represented by Formulae 2-1 to 2-5; Y includes at least one of groups represented by Formulae 3-1 and 3-2; at least one of the X and the Y has a molecular chain end having a group capable to chemically cross-link with materials of alignment layers; and at least one of the X and the Y has a side chains having a group capable to generate a hydrogen bond or intermolecular force with a material of liquid crystal molecules. The present disclosure also discloses a liquid crystal display panel having the post spacers described above and a method of manufacturing the same.