Liquid Crystal Composition for 3D Display UV Resistance
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Solution Overview
Problem
Existing liquid crystal display devices for switching between 2D and 3D modes face challenges in achieving high birefringence and UV resistance, making it difficult to adjust refractive index anisotropy and maintain display quality.
Innovation Solution
A liquid crystal display device comprising a first panel with a liquid crystal layer and color filter, a second panel with a liquid crystal layer, and a polymer interposed between them, where the polymer is cured using UV light to bond the panels, utilizing specific compounds in the liquid crystal layer to enhance dielectric anisotropy and resistance to UV irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal composition is designed to achieve high birefringence (Δn) and strong UV resistance, then display quality and reliability are improved, but it becomes extremely difficult to adjust Δn to desired values and maintain practicable viscosity
Solution Approach 1:
The patent uses a composite liquid crystal composition containing specific compounds (cyclic carbonate compounds with formulas (1) and (2), carboxylic acid compounds with formulas (3) and (4), and their reactants) that work synergistically to achieve high UV resistance, desired birefringence, and practicable viscosity simultaneously
Solution Approach 2:
The patent achieves the desired balance by carefully controlling the compositional ratios of different liquid crystal compounds and adjusting molecular structures (such as alkyl chain lengths and aromatic ring substitutions) to tune Δn, UV resistance, and viscosity parameters to optimal values
2Adaptability or versatility
If the liquid crystal display device for display switching is placed between the display device and viewer to enable 2D/3D switching, then display functionality is improved, but the device requires both high birefringence and strong UV resistance which are difficult to achieve simultaneously
Solution Approach 1:
The patent employs a multi-component liquid crystal system where cyclic carbonate compounds provide high birefringence, carboxylic acid compounds contribute to UV resistance through their molecular structures, and the combination enables both 2D/3D switching functionality and durability under UV exposure from the bonding process
Solution Approach 2:
The patent optimizes specific regions of the liquid crystal composition by placing compounds with different properties in appropriate concentrations, creating a composition that simultaneously satisfies the high birefringence requirement for display switching and the UV resistance requirement for bonding stability
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 provides excellent display properties, enabling reliable switching between 2D and 3D modes with improved UV resistance and refractive index anisotropy, reducing display defects and maintaining high performance over time.
Implementation Method 1
the polymer is cured using UV light to bond the panels
Implementation Method 2
enhance dielectric anisotropy and resistance to UV irradiation
Data Source
AI summary
An object of the present invention is to provide a composition that realizes high Δn, has a wide liquid crystal phase temperature range, small viscosity, excellent low-temperature solubility, and high resistivity and voltage holding ratio, and is stable against heat and light, and to provide a liquid crystal composition having an excellent lens effect and excellent chemical stability using the composition, and a liquid crystal display device and a liquid crystal lens that use the liquid crystal composition. The present invention provides a liquid crystal composition that contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii), a liquid crystal display device using the liquid crystal composition, a liquid crystal lens using the liquid crystal composition, and a birefringence lens for stereoscopic image display using the liquid crystal composition.