Polarizer Alignment via Thermotropic Liquid Crystal Crystallinity
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Solution Overview
Problem
Current polarizers used in image display devices have limitations in achieving a high degree of alignment, which affects the performance of these devices, particularly in terms of optical rotation and light reflection control.
Innovation Solution
A polarizer formed from a composition containing a thermotropic liquid crystal polymer and a dichroic material, where the polymer and dichroic material are horizontally aligned, with a higher crystallinity than the polymer alone, and specific structural ratios and log P value differences are maintained to enhance alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a polymer liquid crystal compound and dichroic material are used to form a polarizer, then the polarizer can control optical rotation and light reflection, but the degree of alignment is insufficient which limits device performance
Solution Approach 1:
The patent changes the physical and chemical parameters of the polymer liquid crystal compound by introducing specific molecular structures with rigid rod-like segments and flexible spacers. This structural modification enables the polymer to achieve high crystallinity and degree of alignment when horizontally stretched, directly resolving the alignment insufficiency issue while maintaining optical control functionality
Solution Approach 2:
The patent creates a composite system by combining the specially structured polymer liquid crystal compound with dichroic material. This composite approach allows the polymer matrix to provide structural alignment and crystallinity while the dichroic material contributes to optical absorption and polarization, achieving both high degree of alignment and reliable device performance
2Adaptability or versatility
If iodine is used as a dichroic material in polarizers, then the polarizer can function, but organic coloring agents may offer improvement potential
Solution Approach 1:
The patent modifies the material parameters by replacing traditional iodine dichroic material with organic coloring agents that have specific molecular structures compatible with the polymer liquid crystal matrix. This substitution allows for better integration and alignment, as the organic coloring agents can be more effectively incorporated into the horizontally stretched polymer structure, improving the overall degree of alignment
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 proposed solution results in a polarizer with improved alignment, leading to enhanced performance in image display devices by optimizing optical properties and light management.
Implementation Method 1
the polymer liquid crystal compound is a thermotropic liquid crystal and a crystalline polymer
Implementation Method 2
a crystallinity of the polymer liquid crystal compound in the polarizer-forming composition is higher than a crystallinity of the polymer liquid crystal compound alone
Implementation Method 3
a linear polarizer or a circular polarizer is used in an image display device to control optical rotation or birefringence in display
Data Source
AI summary
Provided is a polarizer having a high degree of alignment and an image display device including the polarizer. The polarizer is formed of a polarizer-forming composition containing a polymer liquid crystal compound and a dichroic material, in which the polymer liquid crystal compound is a thermotropic liquid crystal and a crystalline polymer, the polymer liquid crystal compound and the dichroic material are horizontally aligned, and crystallinity of the polymer liquid crystal compound in the polarizer-forming composition is higher than the crystallinity of the polymer liquid crystal compound alone.