Vehicle Glazing Coating Pattern for High-Frequency Transmission
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Solution Overview
Problem
Current vehicle window coatings that are electrically conductive and transparent to visible light are impermeable to high-frequency electromagnetic radiation, preventing the operation of devices like mobile phones and satellite navigation systems, and their removal patterns can be visually disruptive and costly.
Innovation Solution
A vehicle window with a transparent, electrically conductive coating featuring sinusoidal-shaped stripped areas that form electrically insulated zones, allowing for high-frequency electromagnetic radiation transmission while minimizing visual disruption and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If transparent electrically conductive coatings are applied to vehicle windows, then protection from overheating and cooling is improved, but transmission of high-frequency electromagnetic radiation is blocked
Solution Approach 1:
The continuous transparent electrically conductive coating is segmented by removing linear regions to create a discontinuous structure. This segmentation allows high-frequency electromagnetic radiation to pass through the gaps while the remaining coating segments maintain the temperature control function by reflecting thermal radiation.
Solution Approach 2:
Different regions of the window coating are given different properties: areas with removed coating allow high-frequency transmission, while areas with remaining coating provide thermal reflection. The sinusoidal pattern creates localized zones that optimize both functions in different spatial locations.
2Reliability
If linear regions are stripped from the coating to enable high-frequency transmission, then electromagnetic radiation transmission is improved, but visual appearance is degraded
Solution Approach 1:
Instead of straight linear regions, sinusoidal curved patterns are used for the stripped areas. This curvature makes the stripped regions less visually conspicuous and more aesthetically pleasing while maintaining the same functional effect of allowing electromagnetic radiation transmission.
Solution Approach 2:
The sinusoidal pattern introduces asymmetry in the positioning and shape of stripped regions, creating a more natural and less obtrusive appearance compared to regular geometric patterns. This asymmetric arrangement reduces visual disruption while preserving transmission functionality.
3Reliability
If grid-like stripping patterns are used to enable high-frequency transmission, then electromagnetic radiation transmission is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The sinusoidal stripping pattern represents a periodic structure that can be efficiently produced using laser technology. The regular wave-like pattern allows for continuous processing without the need for complex positioning and repositioning operations required by grid patterns, reducing manufacturing time and cost.
Solution Approach 2:
The sinusoidal pattern is designed to be produced in a single continuous laser pass without interruption or repositioning. This preliminary design of the pattern geometry enables straightforward manufacturing execution, avoiding the need for multiple processing steps and reducing overall production complexity.
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 sinusoidal pattern enables sufficient transmission of high-frequency electromagnetic radiation for mobile phone and satellite navigation operations without significantly impairing visibility or increasing production time and costs, providing a visually appealing and efficient solution.
Implementation Method 1
protect, for example, interiors from overheating due to sunlight or cooling by reflecting incident thermal radiation
Implementation Method 2
The grid spacing is small compared to the wavelength of the high-frequency electromagnetic radiation, thus structuring a relatively large portion of the coating and significantly impairing transparency
Data Source
Figure 1A~1C
Figure 1D~2B
Figure 3~4
AI summary
The present invention relates to a windowpane (10), in particular a vehicle windscreen comprising: at least one first windowpane (1.1) with an outer side (lll) and an inner side (lV), at least one transparent, electrically conductive coating (3) which is arranged on the outer side (III) and/or on the inner side (IV) of the first windowpane (1.1), and at least one structure (4) which is formed by de-coated, linear areas (4.1) within the transparent, electrically conductive coating (3) in such a way that the linear areas (4.1) are partially in contact and as a result form a multiplicity of electrically insulated zones (6) within the coating (3), wherein the de-coated linear areas (4.1) have a sinusoidal shape, wherein the windowpane (10) has areas with different amplitudes and/or frequencies of the sinusoidal de-coated areas (4.1).