Liquid Crystal Member Non-Flat Surface Alignment

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Solution Overview

Problem

Liquid crystal layers with non-flat surfaces face challenges in achieving uniform alignment, leading to undesired optical characteristics due to interactions between the liquid crystal layer and adjacent parts, which affects the alignment angles and overall performance in optical sensors and modulation elements.

Innovation Solution

A liquid crystal member with a liquid crystal layer where the liquid crystal compound has magnetic susceptibility anisotropy and is immobilized in an aligned state, featuring a non-flat surface configuration where the slow axis is parallel on one main surface and equal to adjacent surfaces on the other, ensuring uniform alignment and desired optical characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the liquid crystal layer is made to have a non-flat surface to match optical sensors or components, then adaptability to various optical applications is improved, but alignment uniformity deteriorates due to position-dependent alignment angles

Engineering Contradiction:

Improveadaptability to optical sensorsVSAvoidalignment uniformity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent applies different alignment characteristics to different regions of the liquid crystal layer. Specifically, the slow axis alignment is made equal to adjacent non-flat surfaces in certain regions while being parallel to the reference plane in other regions, allowing the layer to adapt to non-flat optical components while maintaining controlled alignment properties in each local region

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent introduces a third dimension by specifying alignment angles relative to the non-flat surface geometry rather than only in the plane direction. This allows the liquid crystal compounds to align with the contours of non-flat optical components while maintaining uniform optical characteristics through controlled alignment angles

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If the liquid crystal compound aligns with the non-flat surface geometry, then contact with optical components is improved, but alignment control deteriorates due to position-dependent alignment angles

Engineering Contradiction:

Improvecontact with optical componentsVSAvoidalignment control

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent specifies different alignment requirements for different regions: in regions adjacent to non-flat surfaces, the slow axis aligns with equal angle to the adjacent surface, while in other regions the slow axis remains parallel to the reference plane, providing local optimization for both contact and control

Inventive Principle:

Principle #3Local quality

3Reliability

If the liquid crystal layer has a non-flat surface to prevent voids, then reliability of optical coupling is improved, but optical characteristics deteriorate due to non-uniform alignment

Engineering Contradiction:

Improveoptical couplingVSAvoidnon-uniform alignment effects

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies different alignment strategies to different regions of the liquid crystal layer. In regions where optical coupling is critical, the slow axis aligns with equal angle to adjacent non-flat surfaces to prevent voids and improve coupling reliability, while in other regions the alignment is controlled to remain parallel to the reference plane to maintain uniform optical characteristics

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent converts the potentially harmful effect of non-flat surfaces (which cause non-uniform alignment) into a beneficial feature by deliberately designing the alignment pattern to match the non-flat geometry in specific regions, thereby improving optical coupling while controlling the alignment uniformity through the dual-region alignment approach

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 solution enables the attainment of desired optical characteristics in liquid crystal members with non-flat surfaces, enhancing their performance in optical sensors and millimeter-wave modulation elements by maintaining uniform alignment and reducing issues like scattering and refraction.

Implementation Method 1

the liquid crystal compound has magnetic susceptibility anisotropy

Methodology Applied

Scientific EffectMagnetic susceptibility anisotropy: Magnetism

Data Source

PatentUS11934059B2Liquid crystal member and millimeter-wave modulation element

Publication Date: 2024.03.19 FUJIFILM CORP

AI summary

Provided are a liquid crystal member and a millimeter-wave modulation element with the liquid crystal member including a liquid crystal layer having a non-flat surface. The liquid crystal member includes a liquid crystal layer in which a liquid crystal composition which contains a liquid crystal compound having a polymerizable group and a polymerization initiator is immobilized in an aligned state, with at least one main surface of two main surfaces of the liquid crystal layer at both ends in a thickness direction is a non-flat surface having various shapes in a region on the non-flat surface side of one of the two main surfaces, a slow axis of the liquid crystal compound has an equal angle with respect to an adjacent non-flat surface, and in a region on the other main surface side, slow axes of the liquid crystal compound are parallel to each other.