Curable Dichroic Dye and Liquid Crystal Optical Component

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Solution Overview

Problem

Conventional methods for creating optical components with narrow viewing angles suffer from poor viewing angle adjustment, durability issues, and high manufacturing costs, often resulting in compromised physical properties such as heat resistance and visibility.

Innovation Solution

A composition comprising a curable dichroic dye and a curable liquid crystal compound, specifically formulated to be vertically oriented, which forms an optical component with improved visibility, heat resistance, and durability, while controlling the viewing angle effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a vertically oriented film is formed only of the dichroic dye, then the viewing angle is very narrow, but it becomes difficult to adjust the viewing angle

Engineering Contradiction:

Improveviewing angle adjustmentVSAvoidfilm structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines dichroic dye with liquid crystal compounds to form a composite film. The liquid crystal component enables viewing angle adjustment through its ability to change orientation states, while the dichroic dye provides the light absorption and polarization properties. This composite structure resolves the contradiction by integrating two materials with complementary functions.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If conventional methods are used to create optical components with narrow viewing angles, then the viewing angle is controlled, but the physical properties such as heat resistance and durability are compromised

Engineering Contradiction:

Improveviewing angle controlVSAvoidheat resistance and durability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent utilizes the ability of liquid crystal compounds to change their physical state and orientation in response to temperature and electrical fields. By controlling the orientation parameters of the liquid crystal molecules, the film achieves viewing angle control while maintaining thermal stability and durability through the inherent properties of the liquid crystal material.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If a vertically oriented film is formed only of the dichroic dye, then the manufacturing process is simple, but the viewing angle adjustment capability is poor

Engineering Contradiction:

Improvemanufacturing processVSAvoidviewing angle adjustment precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The liquid crystal compound acts as an intermediary material between the dichroic dye and the substrate. It facilitates the orientation control of the dichroic dye molecules and enables precise viewing angle adjustment without complicating the manufacturing process. The liquid crystal layer mediates the interaction between the applied field and the dichroic dye, achieving precise control.

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 optical component exhibits enhanced physical properties like heat resistance, durability, and a narrow viewing angle, with improved visibility and external light control, reducing manufacturing complexity and costs.

Implementation Method 1

a composition comprising a curable dichroic dye and a curable liquid crystal compound

Methodology Applied

Scientific EffectDichroism: Pleochroism

Implementation Method 2

the thin film has light absorption anisotropy that is able to easily achieve the attenuation, polarization, scattering and interception of lights

Methodology Applied

Scientific EffectLight absorption anisotropy: Absorption (EM radiation)

Implementation Method 3

the dichroic dye is an azo or anthraquinone dyes, and has liquid crystalline properties and photo- or thermal cross-linking reactive group

Methodology Applied

Scientific EffectPhoto- or thermal cross-linking: Photopolymerisation

Data Source

PatentUS8545717B2Composition comprising curable dichroic dye for forming optical component and an optical component prepared using the same

Publication Date: 2013.10.01 LG CHEM LTD

AI summary

The present invention relates to a composition comprising a curable dichroic dye and a curable liquid crystal compound, which are used to prepare an optical component that is vertically oriented to give a narrow viewing angle, to form an optical component, and an optical component comprising an optical component layer prepared using the same. There is provided a composition for forming an optical component comprising 0.1-90 parts by weight of a dichroic dye and 10-98.85 parts by weight of a curable liquid crystal compound, and there is also provided an optical component comprising an optical component layer in which a curable liquid crystal compound and a curable dichroic dye are vertically oriented. The optical component comprising an optical component layer in which a curable dichroic dye and a curable liquid crystal compound are vertically oriented and which is made of the composition comprising a curable dichroic dye and a curable liquid crystal compound for forming an optical component has excellent physical properties such as heat resistance, durability to high temperature and high moisture, vertical orientation and dichroic ratio, and also adjust a narrow viewing angle. The durability in the high temperature and high moisture is due to the cross linking shape of the optical component layer.