Alignment Material Composition UV Absorbent LCD Aging
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Solution Overview
Problem
Liquid crystal display (LCD) panels experience display quality issues such as voltage holding ratios, threshold voltage, flicker, and image-retention due to charged ions formed from materials or alignment layers when irradiated by ultraviolet light, leading to aging of liquid crystals.
Innovation Solution
An alignment material composition comprising an alignment material, an ultraviolet absorbent, and a light stabilizer, which absorbs ultraviolet light and prevents aging by converting light energy into heat, while maintaining visible light transmittance and protecting the alignment layer from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the alignment layer is irradiated by ultraviolet light to achieve alignment function, then the alignment effect is improved, but charged ions are generated causing liquid crystal aging and display quality deterioration
Solution Approach 1:
The patent introduces ultraviolet absorbents and light stabilizers as intermediary substances in the alignment layer composition. These additives act as mediators that intercept ultraviolet light before it can cause photochemical reactions in the liquid crystal materials, thereby preventing charged ion generation while maintaining the alignment function.
Solution Approach 2:
The patent converts the harmful ultraviolet light into beneficial heat energy through the ultraviolet absorbents. The absorbents capture UV radiation and transform it into thermal energy, which is then dissipated harmlessly, preventing the UV light from causing degradation while the alignment process remains effective.
2Duration of action of stationary object
If ultraviolet absorbent and light stabilizer are added to prevent aging, then the lifespan is extended, but the composition complexity increases
Solution Approach 1:
The patent creates a composite alignment layer material system that integrates multiple functional components: alignment-inducing polymers, ultraviolet absorbents, and light stabilizers. This composite approach allows simultaneous achievement of alignment function and aging prevention within a single integrated material layer, managing complexity through functional integration.
Solution Approach 2:
The alignment layer composition is designed to perform multiple functions simultaneously: the polymer matrix provides alignment function, while embedded ultraviolet absorbents and light stabilizers provide protection against aging. This multi-functionality reduces the need for separate protective layers, simplifying the overall structure despite the enhanced composition.
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 alignment material composition effectively absorbs ultraviolet light, maintaining the voltage holding ratio and display uniformity of LCD panels, thereby extending their lifespan and preventing aging.
Implementation Method 1
the ultraviolet absorbent has a following formula 1-1 or a formula 1-2... effectively absorbing ultraviolet light
Implementation Method 2
Energy of ultraviolet light causes photo-chemical reactions to occur within the liquid crystals or within the alignment layer
Implementation Method 3
an alignment material composition which includes an alignment material... maintaining the voltage holding ratio and display uniformity
Data Source
AI summary
An alignment material composition including an alignment material, an ultraviolet absorbent, a light stabilizer and a solvent is provided. The ultraviolet absorbent has a formula 1 shown as below:wherein X represents hydrogen, alkyl group or halogen while R1 represents benzene ring carbon long-chain derivative. The light stabilizer has a formula 2 shown as below:wherein R2 represents ester-based derivative or amine-based derivative, R3 represents hydrogen, hydroxyl group (—OH) or alkyl group.