Blue Phase Liquid Crystal Display Panel Driving Voltage Reduction
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Solution Overview
Problem
Blue phase liquid crystal display panels face challenges with high driving voltage, which is a barrier for mass production and practical applications due to their relatively high voltage requirements, typically reaching up to 55 volts.
Innovation Solution
A fabricating method for blue phase liquid crystal display panels involves filling a blue phase liquid crystal composition between substrates and inducing polymerization of a reactive monomer using light with a wavelength between 200 nm to 350 nm, resulting in a polymer with a molecular weight less than 105, which reduces the driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If blue phase liquid crystal is used for fast response display, then response time is improved, but driving voltage becomes excessively high (up to 55 volts)
Solution Approach 1:
The patent changes the physical and chemical parameters of the liquid crystal system by introducing a polymer network structure through photopolymerization. This creates a polymer-stabilized blue phase liquid crystal where the polymer matrix modifies the liquid crystal's electrical and optical properties, enabling fast response at reduced driving voltages
Solution Approach 2:
The patent creates a composite material system combining polymer and liquid crystal phases. The polymer network (formed from monomers like acrylic acid or methacrylic acid) is integrated within the blue phase liquid crystal structure, forming a hybrid material that exhibits both the fast response characteristics of blue phase and the stability of polymer networks, while operating at lower voltages
2Productivity
If blue phase liquid crystal composition is used, then fast response and optical isotropy are achieved, but high driving voltage requirements prevent mass production
Solution Approach 1:
The patent modifies the electrical parameters of the blue phase liquid crystal through photopolymerization, creating a polymer-stabilized system that operates at reduced voltages (20-25 volts). This parameter change makes the technology economically viable for mass production while preserving the desired optical and response characteristics
Solution Approach 2:
The patent uses low molecular weight polymers (molecular weight less than 10^5) formed through photopolymerization of small monomer molecules. These polymer networks provide the necessary stabilization without requiring complex or expensive materials, enabling cost-effective manufacturing
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 method achieves a blue phase liquid crystal display panel with a significantly lower driving voltage, typically around 20-25 volts, while maintaining fast response times and good optical properties, making it more suitable for practical applications.
Implementation Method 1
inducing polymerization of a reactive monomer using light with a wavelength between 200 nm to 350 nm
Implementation Method 2
the selective 'Bragg reflection' is generated. Such a feature makes the blue phase capable of being applied to fast light modulators
Data Source
AI summary
A blue phase liquid crystal display panel and a fabricating method thereof are provided. A first substrate and a second substrate are provided, and then a blue phase liquid crystal composition is filled between the first substrate and the second substrate, wherein the blue phase liquid crystal composition includes a blue phase liquid crystal and a reactive monomer. Next, an irradiation process is performed to induce a polymerization reaction in the reactive monomer of the blue phase liquid crystal composition, wherein a light utilized in the irradiation process has a wavelength ranged from 200 nm to 350 nm.