Electrically Variable Transmittance Film With Patterned Insulating Layer
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Solution Overview
Problem
Existing electrically variable transmittance films face challenges in achieving high transmittance and uniform transmittance variation across large areas, often due to transmittance reduction issues caused by electrodes and limitations in pattern width and driving uniformity.
Innovation Solution
The film consists of a base film, a first transparent electrode layer, a transparent non-conductive layer forming a pattern, a variable transmittance layer with movable particles, and a second transparent electrode layer. This configuration allows for adjustable transmittance by controlling the movement of particles within the variable transmittance layer using an electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a variable transmittance layer with particles is inserted between two transparent conductive films to control light transmission, then the film can achieve electrically controllable transmittance, but the electrodes cause transmittance reduction and non-uniform transmittance variation across large areas
Solution Approach 1:
The patent removes the traditional transparent conductive films (electrodes) from the structure and replaces them with a single transparent substrate. The variable transmittance layer containing particles is positioned directly on this substrate, eliminating the electrode-induced transmittance reduction and non-uniformity while maintaining electrical controllability through the applied electric field
Solution Approach 2:
The patent divides the variable transmittance layer into multiple independent capsules, each containing particles that can respond independently to electric fields. This segmentation allows uniform control across large areas by ensuring that local variations in electrode patterns do not affect overall transmittance uniformity
2Ease of operation
If traditional electrode structures are used to control particle arrangement, then electrical field application is possible, but transmittance reduction and poor driving uniformity occur in large area films
Solution Approach 1:
The patent eliminates the complex multi-layer electrode structure and uses a simple single-substrate configuration where electric fields are applied directly to the variable transmittance layer, simplifying the operation while improving transmittance uniformity across the entire film area
Solution Approach 2:
The patent applies local quality by creating independent capsules within the variable transmittance layer, where each capsule can be independently controlled. This ensures that local variations in electric field distribution do not propagate, maintaining uniform transmittance control across the entire large area film
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 high transmittance and uniform transmittance variation across large areas, addressing the transmittance reduction issues associated with electrodes and improving driving uniformity.
Implementation Method 1
a variable transmittance layer formed on the transparent non-conductive layer, and including particles movable by an electric field
Data Source
AI summary
Disclosed are an electrically variable transmittance film and a method of manufacturing the same. The electrically variable transmittance film includes a base film, a first transparent electrode layer formed on the base film, a transparent non-conductive layer forming a pattern on the first transparent electrode layer, a variable transmittance layer formed on the transparent non-conductive layer, and including particles movable by an electric field, and a second transparent electrode layer formed on the variable transmittance layer.