Electrodeposition Smart Window With Nanoparticle Light Blocking
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Solution Overview
Problem
Existing smart windows, such as those using polymer dispersed liquid crystal (PDLC) and suspended particle display (SPD), face issues with high power consumption and insufficient light blocking performance, particularly in achieving uniform light transmittance across all wavelengths.
Innovation Solution
An electrodeposition smart window with a nanoparticle layer formed on a substrate, utilizing nanoparticles like Zn, Ag, Cu, Bi, and Pb, which absorb light through surface plasmon resonance, allowing for adjustable transmittance and effective light blocking with reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If polymer dispersed liquid crystal (PDLC) is used to control light transmittance, then transparency can be adjusted, but power consumption is greatly generated when driving for a long time
Solution Approach 1:
The patent changes the operating principle from liquid crystal scattering (PDLC) to electrochromic coloration, fundamentally altering how light transmittance is controlled. The electrochromic layer changes its optical properties by undergoing a coloration/descoloration reaction when voltage is applied, achieving transmittance control with lower power consumption and without requiring continuous power to maintain the state.
Solution Approach 2:
The patent replaces the liquid crystal scattering mechanism with an electrochromic chemical reaction mechanism. Instead of using liquid crystal molecules that scatter light when dispersed, the system uses an electrochromic layer that changes its light absorption properties through electrochemical reactions, substituting a chemical field approach for the optical scattering approach.
2Device complexity
If suspended particle display (SPD) technology is used, then light transmittance can be controlled, but the thickness becomes thick or the transmission efficiency is low by using a transparent electrode having a multilayer structure
Solution Approach 1:
The patent extracts and eliminates the complex multilayer transparent electrode structure from the SPD system. By using a simplified electrode configuration with the electrochromic layer, the design removes unnecessary layers while maintaining or improving light transmission efficiency, directly addressing the complexity and efficiency trade-off.
Solution Approach 2:
The patent employs composite material structures in the electrochromic layer, combining conductive polymers or metal oxides with electrochromic compounds to achieve both electrical functionality and optical performance in a single integrated layer, reducing the need for separate multilayer electrode structures.
3Object-affected harmful factors
If polymer dispersed liquid crystal is used to scatter light, then transparency can be controlled, but the performance of blocking the transmission of light itself is insufficient
Solution Approach 1:
The patent converts the limitation of light scattering into a benefit by using electrochromic materials that can actively absorb and block light across the visible spectrum. When voltage is applied, the electrochromic layer undergoes a coloration reaction that transforms it from a transparent state to a light-blocking state, effectively converting the need for transparency control into an active light blocking capability.
Solution Approach 2:
The patent utilizes color changes in the electrochromic layer to achieve superior light blocking performance. The electrochromic material changes its optical absorption characteristics when voltage is applied, transitioning from transparent to colored (light-blocking) state, providing excellent black implementation and effective light blocking across all wavelengths.
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 smart window achieves significant light transmittance adjustment with minimal energy use, enabling excellent power efficiency and effective light blocking, particularly in implementing uniform black across all wavelengths.
Implementation Method 1
utilizing nanoparticles like Zn, Ag, Cu, Bi, and Pb, which absorb light through surface plasmon resonance
Implementation Method 2
an electrochromic layer formed on the substrate, and wherein the electrochromic layer includes a nanoparticle layer including nanoparticles electrodeposited on the substrate when voltage is applied
Data Source
AI summary
The present disclosure relates to an electrodeposition smart window, and more particularly, to an electrodeposition smart window which is excellent in terms of electrical energy efficiency because it is possible to greatly change transmittance of light even with less current compared to a comparative smart window, and because the transmittance of incident light is uniformly decreased across the entire wavelengths when voltage is applied, and black is excellently implemented, so that light may be effectively blocked or transmitted, and it is very excellent in terms of usability as a smart window.