Invisible Patterned Conductive Layers for Vehicle Windows
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Solution Overview
Problem
Vehicle windows with conductive layers for infrared light blocking often interfere with wireless communications and create unattractive visible artifacts when patterned, as they tend to block radio-frequency signals and are noticeable visually.
Innovation Solution
A patterned conductive layer is created in vehicle windows using techniques like laser processing, with insulating material matching the optical properties of the conductive layer being used to fill removed areas, making the patterning invisible and allowing radio-transparent regions for signal passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conductive layers are used to block infrared light, then heat blocking capability is improved, but wireless communication is blocked
Solution Approach 1:
The conductive layer is segmented into patterned regions with conductive material selectively removed to create radio-transparent zones. This segmentation allows infrared blocking in covered areas while permitting radio-frequency signal passage through gaps, resolving the contradiction between heat blocking and wireless communication capabilities
Solution Approach 2:
Different regions of the window receive different treatments: some areas maintain conductive material for infrared blocking, while other areas have conductive material removed to enable radio transmission. This local differentiation allows simultaneous optimization of both thermal and communication functions in different spatial zones
2Reliability
If conductive layers are patterned to allow radio transmission, then wireless communication is improved, but visible artifacts are created
Solution Approach 1:
An insulating material layer is introduced as an intermediary substance to fill the gaps where conductive material has been removed. This insulating material matches the optical properties of the conductive layer, making the patterned regions visually indistinguishable from the original continuous layer while maintaining radio-frequency transparency
Solution Approach 2:
The insulating material is selected to match the optical properties, including color and reflectivity, of the conductive layer. This optical matching ensures that the patterned regions blend seamlessly with the surrounding areas, eliminating visible artifacts while preserving the functional pattern
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
The solution effectively blocks infrared light while allowing radio-frequency signals to pass through, maintaining the aesthetic appeal of the window by rendering the patterned conductive layer invisible and ensuring uninterrupted wireless communication.
Implementation Method 1
The conductive layers provide the windows with the ability to shield vehicle occupants from infrared light
Implementation Method 2
The insulating material may have optical properties that are matched to the optical properties of the conductive layer, making the patterning of the conductive layer invisible and unnoticeable to an unaided eye
Data Source
AI summary
A system such as a vehicle may have windows. A window may have rigid clear layers such as layers of glass or rigid polymer. A polymer layer may be interposed between the rigid clear layers to form a laminated window structure. A conductive layer such as a silver layer or other metal layer in the window may be configured to block infrared light. The conductive layer may be patterned to form signal paths, a radio-transparent region, and other structures in a window. The conductive layer may be formed as a coating on a rigid clear window layer or may be formed on other window structures. The conductive layer may be patterned by removing conductive material from areas of the conductive layer. An insulating layer that visually matches the conductive layer may be formed in these areas without overlapping the conductive area.