Branched Organosilicon Alignment for LCDs Without PI Films
Solution Overview
Problem
Conventional polyimide (PI) alignment films in liquid crystal display devices (LCDs) face issues such as dust, electrostatic residues, limited heat and aging resistance, high cost, and complex manufacturing processes, which affect the alignment and quality of liquid crystal molecules.
Innovation Solution
A branched organosilicon material with a unique molecular structure (SinO2n+1R1nR2n+2) is used to align liquid crystal molecules without a PI film, offering low surface tension, high temperature resistance, and anchoring capabilities, simplifying the manufacturing process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If friction alignment PI materials are used, then liquid crystal molecules can be aligned, but dust particles, electrostatic residues, and brush marks occur reducing process yield
Solution Approach 1:
The patent extracts and eliminates the friction alignment process entirely by using photoalignment materials that achieve liquid crystal alignment through optical fields rather than mechanical friction, thereby removing the source of dust particles, electrostatic residues, and brush marks while maintaining alignment quality
Solution Approach 2:
The patent replaces the mechanical friction alignment system with an optical alignment system using photoalignment materials and UV irradiation, substituting mechanical contact with electromagnetic field interaction to eliminate mechanical defects
2Object-generated harmful factors
If light alignment materials are used, then dust and electrostatic residues are avoided, but material properties are limited with inferior heat resistance and aging resistance
Solution Approach 1:
The patent develops composite photoalignment materials that integrate the advantages of both organic photoalignment properties and inorganic silicon oxide structures, achieving improved heat resistance and aging resistance while maintaining the ability to avoid dust and electrostatic residues through optical alignment
Solution Approach 2:
The patent modifies the chemical composition and molecular structure of photoalignment materials by incorporating silicon oxide components, fundamentally changing the material parameters to achieve superior thermal stability and aging resistance compared to conventional organic photoalignment materials
3Manufacturing precision
If PI materials are used, then liquid crystal alignment is achieved, but the materials are expensive and filming procedure is complex increasing manufacturing costs
Solution Approach 1:
The patent extracts and eliminates the complex multi-step PI film deposition process by using photoalignment materials that can be applied as simple coating layers and activated through UV irradiation, dramatically simplifying the manufacturing procedure while maintaining alignment functionality
Solution Approach 2:
The patent replaces the complex mechanical and chemical PI film deposition process with a simplified photochemical alignment process, substituting multi-step thermal and mechanical processing with single-step UV irradiation
4Manufacturing precision
If PI materials are used, then alignment function is provided, but high polarity and high water absorption cause deterioration during storage and transportation
Solution Approach 1:
The patent creates composite materials combining organic photoalignment components with inorganic silicon oxide, achieving low water absorption and high storage stability while maintaining the alignment function through photochemical mechanisms
Solution Approach 2:
The patent fundamentally changes the material composition parameters by incorporating silicon oxide, transforming the material from high-polarity, high-hydrophilicity PI materials to low-polarity, low-water-absorption photoalignment materials with superior storage stability
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 branched organosilicon material effectively aligns liquid crystal molecules with improved temperature resistance and anchoring properties, simplifying the manufacturing process and reducing costs by eliminating the need for PI films in LCDs.
Implementation Method 1
—Si—O— is also a polar anchoring group, capable of anchoring other materials
Data Source
AI summary
Disclosed is a branched organosilicon material, and a method of manufacturing a liquid crystal display panel with the branched organosilicon material, without use of an alignment film. In addition, a liquid crystal display panel thus manufactured is further disclosed.