Flat PTC Heater Element for Signal Transmission Through Glass
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Solution Overview
Problem
Existing motor vehicle glass pane heating solutions fail to effectively clear condensation, ice, and snow, leading to signal transmission defects in electrical signaling devices, especially when installation space is limited.
Innovation Solution
A flat electric heater element with a positive temperature coefficient (PTC) resistance layer, integrated into the glass pane, provides targeted heating around signaling device passages, ensuring clear signal transmission by melting ice and snow, and is designed to be flexible and thin for minimal installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional heater element is used to clear ice and snow, then signal transmission is improved, but installation space requirements increase
Solution Approach 1:
The heater element is constructed as a thin, flexible film that can be conformally applied to the glass pane surface. This thin-film structure dramatically reduces the installation space required compared to conventional rigid heater elements, while maintaining the heating function needed to clear ice and snow for reliable signal transmission.
Solution Approach 2:
The heater element is designed with a three-dimensional contour that follows the curvature of the glass pane. By adapting to the third dimension (depth/curvature), the heater maintains intimate thermal contact with the glass surface across the entire heating area, improving heating efficiency and signal transmission reliability without increasing the planar installation footprint.
2Object-affected harmful factors
If heating power is increased to clear ice and snow effectively, then clearing effectiveness is improved, but energy consumption increases
Solution Approach 1:
The heater element features spatially varying heating zones with different power densities. Regions prone to heavier ice and snow accumulation receive higher heating power, while areas with less accumulation receive lower power. This localized quality approach clears ice and snow effectively where needed while minimizing overall energy consumption.
Solution Approach 2:
The heater element can be operated in periodic cycles, alternating between high-power clearing mode and low-power maintenance mode. During periodic high-power operation, ice and snow are rapidly cleared; during low-power intervals, the heater maintains sufficient temperature to prevent re-accumulation, thereby reducing average energy consumption while maintaining clearing effectiveness.
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 prevents signal obstruction by maintaining clear glass regions, allowing unimpeded transmission of electromagnetic, radar, or sonar signals through the glass pane, even in adverse weather conditions, while being adaptable to limited installation spaces.
Implementation Method 1
The electrical resistance layer is composed of a material with a positive temperature coefficient (PTC). The electrical resistance of the said material is temperature-dependent. It increases as the temperature rises and decreases as the temperature falls.
Implementation Method 2
The electrical resistance layer is composed of a material with a positive temperature coefficient (PTC). The electrical resistance of the said material is temperature-dependent. It increases as the temperature rises and decreases as the temperature falls.
Implementation Method 3
Heat which is generated by the flat heater element in the region 8 of the glass pane prevents or clears condensation water and also melts and therefore likewise clears ice and snow.
Data Source
AI summary
Flat electric heater element having a self-adhesive surface for the purpose of adhesive-bonding to a glass pane of a motor vehicle, and having a passage opening to allow the passage of signals from/to a signaling device which is installed in the motor vehicle.