Monolithic Electrochromic Windows With Independent Tinting Zones
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Solution Overview
Problem
Electrochromic windows with multiple tinting zones face challenges in achieving flexible tinting without visible scribe lines, as existing methods require physical segmentation of the monolithic device, leading to functional impairment and aesthetically unappealing bright lines.
Innovation Solution
The implementation of a monolithic electrochromic device with resistive zones and lengthwise variable bus bars allows for independent operation of tinting zones without physical segmentation, using resistive zones to inhibit electron and ion flow and bus bars to create tint gradients, thereby eliminating visible scribe lines and maintaining device functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If physical segmentation is used to create multiple tinting zones, then independent operation of zones is achieved, but visible scribe lines and functional impairment occur
Solution Approach 1:
The patent applies segmentation by creating multiple tinting zones within a monolithic electrochromic device through strategic placement of bus bars and resistive zones. The device is divided into functionally independent zones (e.g., driver zone, passenger zone, rear window zones) that can be controlled separately through independent bus bar connections, while maintaining the physical integrity of the monolithic structure to avoid scribe lines and functional impairment.
Solution Approach 2:
The patent implements local quality by introducing resistive zones at specific locations between tinting zones. These resistive zones have higher electrical resistance that limits current flow and ion migration between adjacent zones, enabling independent control of each zone while maintaining the monolithic structure. This localized modification allows functional segmentation without physical cutting.
2Adaptability or versatility
If physical segmentation is used to create multiple tinting zones, then independent operation of zones is achieved, but visible scribe lines appear
Solution Approach 1:
The patent applies segmentation by creating multiple tinting zones within a monolithic electrochromic device through strategic placement of bus bars and resistive zones. The device is divided into functionally independent zones (e.g., driver zone, passenger zone, rear window zones) that can be controlled separately through independent bus bar connections, while maintaining the physical integrity of the monolithic structure to avoid scribe lines and functional impairment.
Solution Approach 2:
The patent uses resistive zones as intermediary elements between adjacent tinting zones. These resistive zones act as electrical buffers that prevent direct current flow between zones while being visually imperceptible when tinted. This intermediary structure enables functional segmentation without the need for visible physical dividers or scribe lines.
3Adaptability or versatility
If resistive zones are introduced to inhibit electron and ion flow, then independent zone operation is maintained, but device complexity increases
Solution Approach 1:
The patent implements local quality by introducing resistive zones at specific locations between tinting zones. These resistive zones have higher electrical resistance that limits current flow and ion migration between adjacent zones, enabling independent control of each zone while maintaining the monolithic structure. This localized modification allows functional segmentation without physical cutting.
Solution Approach 2:
The patent applies parameter changes by modifying the electrical resistance parameter in specific regions of the electrochromic device. Resistive zones are created with higher resistance values (through material composition changes, thickness variations, or patterned structures) to control ion flow between zones. This parameter modification enables zone independence while maintaining structural simplicity.
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 enables flexible and uniform tinting across electrochromic windows with multiple zones, enhancing aesthetic appeal and maintaining the functional integrity of the device, while allowing for various tinting schemes and gradient effects.
Implementation Method 1
a resistive zone between adjacent tinting zones... where the two or more tinting zones are not separated from each other by isolation scribes
Implementation Method 2
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
Implementation Method 3
Tungsten oxide is a cathodically tinting electrochromic material in which a tinting transition, bleached (untinted) to blue, occurs by electrochemical reduction
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.