Liquid Crystal Composition for Anisotropic Layer Alignment and Surface Quality

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Solution Overview

Problem

Existing liquid crystal compositions used in light absorption anisotropic layers suffer from degraded surface state and alignment issues, limiting their performance in devices requiring attenuation, polarization, and light-shielding functions.

Innovation Solution

A liquid crystal composition comprising a liquid crystal compound A and a compound B, both exhibiting a smectic phase, with a specific mass ratio and structural alignment, along with a dichroic substance, forms a light absorption anisotropic layer with enhanced surface state and alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a conventional liquid crystal composition is used to form a light absorption anisotropic layer, then the layer can be formed, but the surface state and alignment degree are degraded

Engineering Contradiction:
Improvealignment degreeVSAvoidsurface state
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the liquid crystal mixture by incorporating specific compounds (cyclic carboxylic acid compounds and compounds with carbonyl groups at terminal positions) to improve both surface state and alignment degree simultaneously

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite liquid crystal composition by combining multiple specific compounds with defined chemical structures and functional groups, where each component contributes to overcoming the degradation of surface state and alignment degree

Inventive Principle:
Principle #40Composite materials

2Adaptability or versatility

If a liquid crystal composition is used for light absorption anisotropic layer, then attenuation and polarization functions are achieved, but surface state degradation occurs

Engineering Contradiction:
Improveoptical functionVSAvoidsurface state
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent modifies the compositional parameters by selecting specific cyclic carboxylic acid compounds and compounds with terminal carbonyl groups, maintaining optical functionality while preventing surface state degradation

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The specific liquid crystal compounds act as intermediaries between the dichroic substance and the substrate, mediating to prevent surface state degradation while maintaining optical performance

Inventive Principle:
Principle #24Intermediary (Mediator)

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 composition enables the formation of a light absorption anisotropic layer with improved surface state and alignment, facilitating better performance in image display devices.

Implementation Method 1

a liquid crystal compound A represented by Formula (I); a compound B represented by Formula (II)... at least one of the liquid crystal compound A or the compound B is a compound exhibiting a liquid crystal state of a smectic phase

Methodology Applied
Scientific EffectSmectic phase: Liquid Crystals

Implementation Method 2

a dichroic substance... In the related art, iodine has been widely used as a dichroic substance in these polarizers

Methodology Applied
Scientific EffectDichroism: Dichroic Filter

Data Source

PatentUS12473493B2Liquid crystal composition, light absorption anisotropic layer, laminate, and image display device
Publication Date: 2025.11.18 FUJIFILM CORP
  • US12473493B2 patent drawing
  • US12473493B2 patent drawing
  • US12473493B2 patent drawing

AI summary

A liquid crystal composition capable of forming a light absorption anisotropic layer with an excellent surface state and an excellent alignment degree, a light absorption anisotropic layer, a laminate, and an image display device. The liquid crystal composition is a liquid crystal composition including a liquid crystal compound A represented by Formula (I) Q1-V1-SP1-X1-(Ma-La)na-X2-SP2-V2-Q2, a compound B represented by Formula (II) Q1-V1-SP1-X1-(Mb-Lb)nb-SP3-(Mc-Lc)nc-X2-SP2-V2-Q2, and a dichroic substance.