Electrostatic Microblinds for Smart Window Light Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current smart window technologies, particularly those using electrochromic layers, face limitations in lifetime, speed, maximum IR transmission, and visual aspect, while macroblinds have drawbacks such as high cost and reliability issues, failing to effectively control visible and infrared light transmission for optimal energy efficiency and user comfort.
Innovation Solution
The development of microblinds fabricated on a large-scale substrate using a thin stressed layer that can be actuated by electrostatic forces, allowing for controlled variation in light transmission based on solar radiation and user requirements, with the ability to be applied to windows or illuminated panels, enabling flexible and efficient light modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrochromic layers are used for smart windows, then light transmission control is achieved, but lifetime and speed are limited
Solution Approach 1:
The window is divided into multiple independent microblinds that can be individually controlled. Each microblind is a separate mechanical element rather than a continuous electrochromic layer, allowing individual actuation and improving overall system reliability and lifetime.
Solution Approach 2:
The patent replaces the electrochemical mechanism of electrochromic layers with a mechanical microblind system actuated by electrostatic forces. This mechanical approach eliminates the degradation issues associated with electrochromic materials while maintaining light transmission control capability.
2Adaptability or versatility
If electrochromic layers are used for smart windows, then light transmission control is achieved, but maximum IR transmission is limited
Solution Approach 1:
The microblinds are designed with selective optical properties where different portions or types of blinds can have different characteristics. Some microblinds can be optimized for visible light transmission while others focus on IR blocking, allowing simultaneous optimization of both visible comfort and thermal performance.
3Adaptability or versatility
If macroblinds are used, then light transmission control is achieved, but cost and reliability are problematic
Solution Approach 1:
The patent transitions from macro-scale blinds to micro-scale blinds, reducing the size of each individual blind element while increasing their density. This dimensional change allows the system to be integrated directly into the window glass structure, eliminating the need for separate mechanical assemblies and improving reliability.
4Ease of manufacture
If microblinds are fabricated on large-scale substrate, then manufacturing feasibility is improved, but fabrication complexity increases
Solution Approach 1:
The patent combines multiple fabrication steps into a single integrated process. The microblinds are fabricated directly on the window substrate using deposition and patterning techniques that can be performed in one continuous manufacturing flow, reducing overall process complexity despite the sophisticated structures created.
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
Microblinds provide improved comfort and significant energy savings by dynamically adjusting light transmission, offering a cost-effective and reliable solution for smart windows that can be integrated into existing structures, enhancing both heating and cooling efficiency while maintaining a visually appealing appearance.
Implementation Method 1
They are activated by electrostatic forces and can therefore be actuated either by an automated monitoring system (ambient light and/or temperature) or directly by the user.
Data Source
AI summary
A microblind system has an array of overhanging stressed microblinds, each having an anchor portion attached a substrate and a mobile portion. The microblinds are responsive to electrostatic forces to mutate between a deployed configuration wherein the mobile portion obscure the substrate and a curled configuration wherein the mobile portion exposes the substrate. A transparent conductive layer permits the application of an electric field to the microblinds.