Monolithic EC Window Zoning Without Visible Scribe Lines
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Solution Overview
Problem
Electrochromic windows with multiple tinting zones face challenges in achieving flexible tinting without visible scribe lines, which disrupt the aesthetic and functional integrity of the windows.
Innovation Solution
The implementation of a monolithic electrochromic device with two or more tinting zones, where each zone is configured for independent operation using bus bars, and a resistive zone is used to separate the tinting zones without physical segmentation of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the EC device is segmented into multiple separate devices to create tinting zones, then independent control of each zone is achieved, but visible scribe lines appear in the viewable area disrupting aesthetics
Solution Approach 1:
The patent applies segmentation by dividing a monolithic EC device into multiple independently controllable tinting zones through strategic placement of bus bars and application of voltage gradients, allowing each zone to be controlled separately without physically segmenting the device structure
Solution Approach 2:
The patent implements local quality by creating spatially varying electrical resistance within the monolithic EC device through resistive zones, enabling different regions to have different optical properties (tint levels) while maintaining the physical integrity and aesthetic appearance of the entire device
2Shape
If a monolithic EC device is used without segmentation, then aesthetic integrity is maintained with no visible scribe lines, but independent control of multiple tinting zones cannot be achieved
Solution Approach 1:
The patent changes the electrical resistance parameter within the monolithic EC device by introducing resistive zones, which enables independent control of multiple tinting zones while maintaining the physical integrity and aesthetic appearance of the device. The resistive zones create voltage gradients that allow different regions to be controlled independently
3Adaptability or versatility
If physical segmentation is used to create tinting zones, then independent operation of zones is achieved, but the functional integrity of the EC device is compromised
Solution Approach 1:
The patent applies functional segmentation through electrical means rather than physical segmentation. By using resistive zones and strategic bus bar placement, the device achieves independent zone control while maintaining the physical continuity and functional integrity of the monolithic EC device structure
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 approach allows for flexible and independent control of tinting zones, eliminating visible scribe lines and maintaining the functional integrity of the electrochromic device, thereby enhancing the aesthetic and functional capabilities of electrochromic windows.
Implementation Method 1
Electrochromism is a phenomenon in which a material exhibits a reversible electrochemically-mediated change in an optical property when placed in a different electronic state, typically by being subjected to a voltage change. For example, one well known electrochromic material is tungsten oxide (WO3). Tungsten oxide is a cathodically tinting electrochromic material in which a tinting transition, bleached (untinted) to blue, occurs by electrochemical reduction.
Implementation Method 2
When electrochemical oxidation takes place, tungsten oxide transitions from blue to a bleached state.
Data Source
AI summary
Thin-film devices, for example, multi-zone electrochromic windows, and methods of manufacturing are described. In certain cases, a multi-zone electrochromic window comprises a monolithic EC device on a transparent substrate and two or more tinting zones, wherein the tinting zones are configured for independent operation.