Optical Element Using Peeled α-ZrP Particles for Low-Voltage Control
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Solution Overview
Problem
Existing optical elements face challenges in controlling light transmittance or reflectance at low voltages, maintaining chemical stability, and minimizing light absorption, especially at high concentrations and high viscosity, while also requiring high light transmittance and low viscosity for thin-film applications.
Innovation Solution
An optical element comprising a cell with substrates and electrodes, where the dispersion includes peeled α-ZrP or α-TiP particles in a nematic state, oriented by electric fields, and controlled by polarizers, allowing for modulation of light transmittance or reflectance through frequency and orientation adjustments, maintaining orientation even after the electric field is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If graphene oxide colloid is used for low-voltage driving, then electro-optical reactivity is improved, but chemical stability deteriorates and light absorption increases
Solution Approach 1:
The patent changes the material parameters by replacing graphene oxide with phospholipid molecules that have specific molecular structures containing polar groups. This parameter change maintains electro-optical reactivity while improving chemical stability and reducing light absorption in the visible range.
Solution Approach 2:
The patent uses composite phospholipid molecules that combine hydrophilic head groups with hydrophobic tail groups, creating amphiphilic structures that form stable colloidal dispersions. This composite molecular structure achieves both chemical stability and desired optical properties.
2Illumination intensity
If particle concentration is increased for high light transmittance control, then optical efficiency is improved, but viscosity increases
Solution Approach 1:
The patent changes the size parameter of the particles by using molecular-scale phospholipid structures instead of larger graphene oxide flakes. This size reduction allows higher concentration dispersions to maintain low viscosity while still providing effective light transmittance control through increased particle density.
3Illumination intensity
If high concentration dispersion is used for thin-film fabrication, then light transmittance is improved, but viscosity increases
Solution Approach 1:
The patent changes multiple parameters simultaneously: molecular size, shape, and surface properties of the phospholipid particles. These parameter changes enable the formulation of high-concentration dispersions with tunable viscosity characteristics, facilitating thin-film fabrication while maintaining high light transmittance.
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
This solution enables efficient control of light transmittance or reflectance at low voltages, enhances chemical stability, and achieves high light transmission efficiency with low viscosity, even at high concentrations, maintaining orientation after voltage removal.
Implementation Method 1
The orientation of at least one of the α-ZrP particles or the α-TiP particles is changed by an electric field applied to the electrode
Implementation Method 2
An optical element includes a first polarizer and a second polarizer disposed to be perpendicular to each other
Data Source
AI summary
An exemplary embodiment of the present invention provides an optical element including a first polarizer and a second polarizer disposed to be perpendicular to each other, and a cell disposed between the first polarizer and the second polarizer. The cell includes a first substrate and a second substrate facing each other, an electrode positioned between the first substrate and the second substrate, and a dispersion disposed between the first substrate and the second substrate and including at least one of peeled α-ZrP particles and peeled α-TiP particles. The peeled α-ZrP particles and the peeled α-TiP particles are in a nematic state. The orientation of at least one of the α-ZrP particles or the α-TiP particles is changed by an electric field applied to the electrode.