Polymer Walls in Flexible Liquid Crystal Displays
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Solution Overview
Problem
Flexible and curved liquid crystal displays face issues with non-uniform cell thickness and liquid crystal flow during bending, leading to reduced display quality due to edge roughness and light leakage.
Innovation Solution
Incorporating a polymerizable monomer in the liquid crystal layer that forms polymer walls with a directional polymerization direction perpendicular to the thickness direction, creating a grid shape to restrict liquid crystal flow and improve edge smoothness, thereby reducing light leakage and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible or curved liquid crystal displays are used to achieve non-flat display forms, then display versatility and adaptability are improved, but the cell thickness becomes non-uniform during bending and liquid crystal flows, causing reduced display quality
Solution Approach 1:
The invention introduces polymer walls that segment the liquid crystal layer into isolated regions. These polymer walls act as physical barriers that divide the continuous liquid crystal layer into discrete segments, preventing liquid crystal flow between different areas during bending. This segmentation approach directly addresses the thickness non-uniformity problem by containing liquid crystal molecules within defined boundaries.
Solution Approach 2:
The invention applies different properties to different parts of the liquid crystal layer by introducing polymer walls with specific mechanical and chemical properties. The polymer walls have different rigidity and adhesion characteristics compared to the surrounding liquid crystal, creating local quality differences that prevent flow at critical boundaries while maintaining flexibility in the overall structure.
2Manufacturing precision
If polymer walls are formed to restrict liquid crystal flow, then cell thickness uniformity is improved, but edge roughness of polymer walls causes light leakage from pixel edges
Solution Approach 1:
The invention changes the polymerization parameters, specifically controlling the polymerization direction to be substantially perpendicular to the thickness direction of the polymer wall. This parameter change affects the molecular orientation and packing of the polymerizable monomer during polymerization, resulting in smoother polymer wall edges with reduced roughness. The controlled polymerization direction ensures that the polymer chains align in a way that minimizes edge irregularities.
3Manufacturing precision
If polymerizable monomer is added to the liquid crystal layer to form polymer walls, then liquid crystal flow is restricted and cell thickness uniformity is improved, but the device structure becomes more complex
Solution Approach 1:
The invention merges the functions of liquid crystal display material and polymer wall-forming material into a single liquid crystal layer composition. The polymerizable monomer is mixed with the liquid crystal material, combining two functional components into one integrated layer. This merging approach simplifies the overall device structure by eliminating the need for separate polymer wall formation processes and additional material layers.
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 directional polymerization of the monomer forms smooth polymer walls that restrict liquid crystal flow, reducing edge protrusions and light leakage, resulting in improved display quality and uniformity in flexible and curved displays.
Implementation Method 1
irradiating the mask plate by ultraviolet light, to form a polymer wall in the liquid crystal layer corresponding to the portion with through holes
Implementation Method 2
a polymerizable monomer arranged in the liquid crystal layer; wherein a plurality of polymer walls are arranged in the liquid crystal layer
Data Source
AI summary
The present disclosure provides a display panel, a preparation method thereof, and a liquid crystal display. The display panel includes a first substrate, a second substrate opposite to the first substrate, a liquid crystal layer between the first substrate and the second substrate, and a polymerizable monomer arranged in the liquid crystal layer; wherein a plurality of polymer walls are arranged in the liquid crystal layer; the polymer wall contacts to the first substrate and the second substrate, and a polymerization direction of the polymerizable monomer in the polymer wall is substantially perpendicular to a thickness direction of the polymer wall. By arranging a plurality of polymer walls to limit the flow of the liquid crystal in a liquid crystal layer, improve an edge roughness of a polymer wall, so as to improve light leakage from an edge of pixels and improve a display effect.