Light Absorption Anisotropic Film Adhesion and Alignment
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Solution Overview
Problem
Existing light absorption anisotropic films face challenges in achieving both high alignment degree and excellent adhesiveness to other members, particularly in liquid crystal compositions.
Innovation Solution
A light absorption anisotropic film composed of a liquid crystal composition containing a liquid crystal compound, a dichroic substance, and a boronic acid compound with a polymerizable group, where the liquid crystal compound is horizontally aligned, and the boronic acid compound includes specific chemical structures and concentrations to enhance adhesiveness and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light absorption anisotropic film is formed using a liquid crystal composition containing a dichroic substance, then the alignment degree is improved, but the adhesiveness to other members deteriorates
Solution Approach 1:
The invention uses a composite liquid crystal composition containing three key components: a liquid crystal compound (for alignment), a dichroic substance (for light absorption anisotropy), and a boronic acid compound with polymerizable group (for adhesiveness). This composite approach allows each component to contribute its specific function, resolving the contradiction between alignment degree and adhesiveness.
Solution Approach 2:
The invention optimizes the concentration parameters of each component in the liquid crystal composition. Specifically, it controls the boronic acid compound content at 0.01-10 wt% and the dichroic substance content at 1-50 wt% relative to the liquid crystal compound, ensuring both high alignment degree and excellent adhesiveness through precise parameter control.
2Reliability
If iodine is used as a dichroic substance in polarizers, then the polarization function is achieved, but the product requires different production processes for each function
Solution Approach 1:
The invention employs a boronic acid compound with polymerizable group that serves multiple functions: it provides adhesiveness to substrates, maintains liquid crystal alignment, and enables single-process fabrication. This multi-functional approach eliminates the need for separate production processes for different functions, reducing device complexity while maintaining polarization performance.
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 results in a light absorption anisotropic film with improved adhesiveness and high alignment degree, suitable for applications in image display devices and laminates.
Implementation Method 1
a light absorption anisotropic film formed of a liquid crystal composition that contains a liquid crystal compound, a dichroic substance, and a boronic acid compound containing a polymerizable group, in which the liquid crystal compound is horizontally aligned
Implementation Method 2
a boronic acid compound containing a polymerizable group
Data Source
AI summary
An object of the present invention is to provide Provided is a light absorption anisotropic film, a laminate, an image display device, and a liquid crystal composition with excellent adhesiveness and a high alignment degree. The light absorption anisotropic film of the present invention is a light absorption anisotropic film is formed of a liquid crystal composition that contains a liquid crystal compound, a dichroic substance, and a boronic acid compound containing a polymerizable group, in which the liquid crystal compound is horizontally aligned.