Composite Pane Camera Window Heating Busbar Arrangement
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Solution Overview
Problem
Existing camera window systems in vehicles face challenges in rapidly clearing fog and ice, which impede the transmission of electromagnetic waves and hinder the functionality of optical sensors, especially in icing conditions, where conventional wiping systems are ineffective.
Innovation Solution
A composite pane with an electrically heatable camera window is developed, comprising an outer and inner pane joined by a thermoplastic intermediate layer, featuring a first electrically conductive transparent coating applied on the inner pane's surface within the camera window and busbars on opposite sides for efficient heating, ensuring homogeneous heat distribution and rapid heating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating element is laminated into the pane at the position of the camera window, then the camera window can be kept free of fog and ice, but the heating performance is insufficient and heating is slow
Solution Approach 1:
The heating system is segmented into multiple independent heating zones: a first heating zone within the camera window with high heating power for rapid local heating, and a second heating zone surrounding the camera window for peripheral anti-fogging. This segmentation allows each zone to be optimized for its specific function, with the camera window zone providing fast heating response.
Solution Approach 2:
Different heating powers are applied to different regions of the pane. The camera window region receives high heating power density for rapid ice and fog clearance, while surrounding regions receive lower heating power appropriate for their anti-fogging needs. This local quality differentiation resolves the contradiction by providing high-speed heating only where critical for camera functionality.
2Reliability
If the heating element is arranged adjacent to the field of view, then the camera window can be heated, but homogeneous heat distribution is not achieved
Solution Approach 1:
The busbars are extracted from conventional side-positioned arrangements and repositioned to extend directly across the heating zones. The first busbar extends across the first heating zone and the second busbar extends across the second heating zone, creating direct electrical pathways that ensure uniform current distribution and homogeneous heat generation across each heating zone.
3Power
If busbars are provided for connection to a voltage source, then electrical heating can be achieved, but the heating performance may be insufficient without proper arrangement
Solution Approach 1:
The busbars are pre-positioned to extend across the heating zones before operation, creating optimal current distribution pathways in advance. This preliminary arrangement ensures that when voltage is applied, maximum heating efficiency is achieved immediately without requiring additional control mechanisms or adjustments during operation.
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 composite pane achieves significantly improved heating performance within the camera window, ensuring it remains clear of fog and ice, thereby maintaining the functionality of optical sensors even in adverse weather conditions.
Implementation Method 1
a first electrically conductive transparent coating (6.1) which is applied within the camera window (2) on a first surface (III) of the inner pane (1) facing the intermediate layer (3) and, inside the camera window (2), a first electrically conductive transparent coating for heating the camera window
Implementation Method 2
at least an outer pane (4) and an inner pane (1) that are joined to one another flat via at least one thermoplastic intermediate layer (3)
Data Source
AI summary
A composite pane with an electrically heatable camera window, which includes, inside the camera window, a first electrically conductive transparent coating for heating the camera window, wherein the first electrically conductive transparent coating is arranged on the first surface of the inner pane inside the camera window and has two busbars provided for connection to a voltage source, which are arranged on two opposite sides of the camera window such that when an electrical voltage is applied to the busbars, a current flows through the first electrically conductive transparent coating.