Integrated Control Unit for Switchable Vehicle Glazing
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Solution Overview
Problem
Electrically switchable motor vehicle glazing systems face signal interference issues due to the length of control signal lines, which affects the reliability of controlling optical properties such as transparency.
Innovation Solution
Integrating a control or regulating unit within the housing of the motor vehicle window lifter or driver, reducing the length of signal lines and minimizing interference, with the housing optionally featuring attachment extensions for secure and tool-free assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control unit is positioned remotely from the glazing, then the system structure is simpler, but the signal line length increases causing interference and reliability issues
Solution Approach 1:
The control unit is integrated into the housing of the window lifter driver, merging previously separate components (control unit, housing, driver) into a unified structure. This reduces the distance between the control unit and glazing, minimizing signal line length and interference while maintaining structural simplicity through the existing housing integration.
2Reliability
If additional fastening devices are used to secure the control unit, then the mounting reliability increases, but the device complexity and assembly steps increase
Solution Approach 1:
The control unit is integrated directly into the housing structure, utilizing the existing housing as the mounting structure. This eliminates the need for additional fastening devices while maintaining secure mounting, as the control unit becomes part of the housing assembly rather than a separate component requiring additional fasteners.
3Reliability
If the control unit is integrated into the housing, then the signal line length is reduced improving reliability, but the ease of replacement decreases
Solution Approach 1:
The control unit is designed as a separable module within the housing, allowing it to be removed and replaced independently while maintaining its integrated position. This modular design enables easy replacement without requiring disassembly of the entire housing or driver assembly, balancing signal reliability through integration with ease of repair through modularity.
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 configuration enhances signal reliability and reduces the need for additional fastening devices, while allowing for easy replacement of the control unit and protection against moisture, improving the functionality and durability of electrically switchable glazing systems.
Implementation Method 1
Electrically switchable glazing of the type mentioned at the outset changes its optical properties, for example the transparency, by applying an electrical voltage or electrical power
Implementation Method 2
Such glazing can serve as sun protection, for example, or take on the function of privacy protection. Electrically switchable glazing can be designed as electrochromic glass or as LC glass (lyquid crystal)
Data Source
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AI summary
The invention relates to electrically switchable motor-vehicle glazing, such as a side or rear window pane of a motor vehicle, wherein at least one optical property can be changed by feeding an electrical signal through a line arranged on a window-pane holder of the motor-vehicle glazing, wherein an open-loop or closed-loop control unit for feeding the electrical signal is provided in a housing, which is arranged in a stationary manner in relation to a motor-vehicle body.