Reactive Monomer Liquid Crystal Alignment Layer UV Polymerization

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Solution Overview

Problem

Conventional liquid crystal displays (LCDs) face challenges in achieving efficient vertical alignment and pretilt of liquid crystals without a separate alignment layer formation process.

Innovation Solution

A reactive monomer composition, represented by Formula 1, is used to form liquid crystal alignment layers on substrates within the LCD, allowing for the injection of a liquid crystal composition that polymerizes to align liquid crystals vertically and pretilt when exposed to UV light, eliminating the need for a separate alignment layer formation process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a separate alignment layer formation process is used, then liquid crystal alignment can be achieved, but the manufacturing process becomes complex and time-consuming

Engineering Contradiction:

Improveliquid crystal alignmentVSAvoidmanufacturing process

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent combines the alignment layer formation and liquid crystal injection processes into a single integrated step. The liquid crystal composition itself contains alignment-inducing components that enable vertical alignment without requiring a separate pre-formed alignment layer, thereby simplifying the manufacturing process while maintaining alignment precision

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The liquid crystal composition serves multiple functions simultaneously: it provides the liquid crystal material for the display while also containing alignment-inducing components that create the necessary surface alignment. This multi-functionality eliminates the need for a separate alignment layer, reducing process complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If a separate alignment layer formation process is used, then liquid crystal alignment can be achieved, but production time increases

Engineering Contradiction:

Improveliquid crystal alignmentVSAvoidproduction time

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The alignment layer formation and liquid crystal injection processes are merged into a single simultaneous operation. The composition is injected and alignment occurs in the same step, eliminating the sequential time required for separate alignment layer formation followed by liquid crystal injection

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The alignment-inducing components are pre-incorporated into the liquid crystal composition itself before injection. This preliminary preparation allows alignment to occur immediately upon injection without requiring a separate subsequent alignment layer formation step, thereby reducing production time

Inventive Principle:

Principle #10Preliminary action

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 reactive monomer composition enables easy vertical alignment and pretilt of liquid crystals, simplifying the manufacturing process and improving LCD performance by integrating alignment layer formation directly into the liquid crystal layer injection process.

Implementation Method 1

a reactive monomer composition, represented by Formula 1, is used to form liquid crystal alignment layers on substrates within the LCD, allowing for the injection of a liquid crystal composition that polymerizes to align liquid crystals vertically and pretilt when exposed to UV light

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation