Tunable Blinds via Voltage-Dependent Elastomer Roughening
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Solution Overview
Problem
Conventional light modulation devices alter light transmission uniformly across the entire area when an electric field is applied, lacking the ability to individually address and control light transmission in specific regions, which limits their functionality in mimicking the dynamic control of window blinds.
Innovation Solution
A tunable blinds structure with a transparent substrate, patterned electrical conductor, and compliant electrode network that allows for voltage-dependent roughening of the elastomer surface, enabling individually addressable segments to mimic the opening or closing of blinds, with a controller for dynamic translucence effects and wireless control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional light modulation device applies an electric field across the entire area, then light transmission is altered uniformly, but the ability to individually address and control light transmission in specific regions is lost
Solution Approach 1:
The patent divides the light modulation device into multiple independently addressable segments or regions. Each segment has its own electrode structure that can be individually controlled by applying voltage to specific conductive strips, enabling selective light modulation in different areas of the window while maintaining uniform control within each segment.
Solution Approach 2:
The patent implements different electrical properties in different regions by patterning conductive strips that can be independently addressed. This allows each local region to have customized light transmission characteristics based on individual voltage application, while the overall structure maintains consistent material and construction properties.
2Adaptability or versatility
If the elastomer surface is voltage-dependent roughening to control light transmission, then precise regional control is achieved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical blind structures with an electroactive elastomer material that changes its light transmission properties in response to applied voltage. This substitution of mechanical control with electrical control simplifies the overall device architecture while enabling precise regional modulation through the patterned electrode network.
Solution Approach 2:
The patent utilizes changes in the physical state of the elastomer material in response to electrical field application. By changing the voltage parameter applied to different regions, the elastomer's optical properties (transmission, scattering) are dynamically adjusted, enabling selective light control without mechanical movement.
3Manufacturing precision
If multiple individually-addressable sections are created with gaps to prevent electrical shorting, then regional control precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses flexible thin film structures for the patterned conductive strips and elastomer layers. This allows the conductive patterns to be manufactured using flexible deposition techniques and enables the gaps between segments to be precisely controlled during fabrication, achieving both high addressing accuracy and manufacturing feasibility.
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
Enables precise control of light transmission in select regions, creating a gradient of transparency or translucency, effectively mimicking the operation of conventional blinds while providing thermal regulation and adaptable light management.
Implementation Method 1
the compliant electrode network is configured to compress the first surface of the at least one dielectric layer in the presence of an electric field between the compliant electrode network and one or more of the individually-addressable sections of the patterned electrical conductor to produce a voltage-dependent roughening of the first surface of the at least one elastomer layer
Data Source
AI summary
Methods and apparatus for modulating light using a tunable light modulation device. The tunable light modulation devices comprises an elastomer structure including at least one elastomer layer, a compliant electrode network of conducting fibers arranged on a first surface of the at least one elastomer layer, a patterned electric conductor arranged on a second surface of the at least one elastomer layer opposite the first surface. The patterned electric conductor includes a plurality of individually-addressable sections, and the compliant electrode network is configured to compress the at least one elastomer layer in the presence of an electric field between the compliant electrode network and one or more of the individually-addressable sections of the patterned electric conductor to produce a voltage-dependent roughening of the at least one elastomer layer.