Electro-optic Window Coating for Variable Light Control
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Solution Overview
Problem
Existing variable transmission window systems face difficulties in achieving a true 'clear' state due to imperfections in films and breakdown of polymeric layers over time, and consumers desire flexible, color-variable coverings that can be installed post-construction without replacing existing architectural elements.
Innovation Solution
The development of window covering systems incorporating electro-optic media with encapsulated electrophoretic materials between transparent electrodes, allowing for control of light transmission and color through electric fields, enabling flexible and energy-efficient modulation of light and color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If variable transmission films and polymeric layers are used to control light transmission, then light transmission control is achieved, but the films and polymeric layers break down over time preventing a true clear state
Solution Approach 1:
The patent removes the problematic polymeric layers and films from the window system by using electro-optic media (electrophoretic displays) that can be applied as coatings or integrated layers without requiring bulky polymeric structures. This extraction eliminates the breakdown issue while maintaining light transmission control functionality.
Solution Approach 2:
The patent changes the operational parameter from passive film-based transmission control to active electro-optic control. By applying electric fields to electrophoretic particles, the system dynamically adjusts light transmission without the degradation issues of polymeric materials, achieving both reliability and extended service life.
2Reliability
If existing window structures are replaced to achieve variable transmission, then performance is improved, but construction disruption and cost increase
Solution Approach 1:
The patent segments the window system into separate functional layers, with the electro-optic media applied as a distinct coating or overlay on existing window surfaces. This segmentation allows the variable transmission functionality to be added independently without replacing the entire window structure, simplifying installation and reducing disruption.
Solution Approach 2:
The electro-optic media are nested within or applied to the existing window structure, integrating the new technology into the current architectural elements. This nesting approach allows the variable transmission system to be incorporated into existing windows without complete replacement, maintaining ease of installation while achieving improved performance.
3Ease of manufacture
If traditional window coverings are used, then installation is simple, but interior design flexibility and color variation are limited
Solution Approach 1:
The patent transforms static window coverings into dynamic electro-optic displays that can change color and transmission properties in real-time. The electrophoretic particles can be electrically controlled to display different colors and transmission states, providing interior design flexibility while maintaining simple installation as a window coating or overlay.
Solution Approach 2:
The electro-optic media serve multiple functions simultaneously: they provide variable light transmission, color variation for interior design, and can be applied as a coating to existing windows. This multi-functionality achieves design versatility without sacrificing installation simplicity, as the same technology platform delivers all these benefits.
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
These systems provide enhanced flexibility in interior design, energy efficiency, and privacy by allowing for variable light transmission and color changes, maintaining performance over time without the need for structural replacements.
Implementation Method 1
an electro-optic medium having a plurality of charged particles disposed in a fluid and capable of moving through the fluid under the influence of an electric field
Data Source
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AI summary
Variable transmission covering systems that can be used, for example, to control the amount of light passing through a window in a building. Using transmissive electrophoretic media that can switch between a first and second optical state, the invention can be used to change the color and/or transmissivity of a structure (or structures) that is placed in front of an object. In some embodiments, the variable transmission system can change transmission and color on command.