Embedded Control Unit in Ribbon Cable Assembly
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Solution Overview
Problem
Existing connections between planar bodies and power supplies experience parasitic losses due to capacitive coupling, leading to unwanted switching signals in capacitive buttons.
Innovation Solution
A connection arrangement with a ribbon cable and control unit embedded in insulating material between the planar body and connection element, reducing parasitic capacitance by shortening the wiring and decoupling capacitances from the button, and incorporating an adjustment mechanism for sensitivity settings within a housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ribbon cable with round conductor is used to connect the flat body to the power supply, then electrical connection is established, but parasitic capacitance is generated causing unwanted switching signals
Solution Approach 1:
The patent changes the geometric parameters of the conductor from round to flat ribbon shape, which fundamentally alters the capacitance characteristics. The flat ribbon conductor has significantly lower parasitic capacitance compared to round conductors of equivalent electrical function, thereby eliminating the unwanted switching signals while maintaining reliable electrical connection.
Solution Approach 2:
The patent transitions from a three-dimensional round conductor to a two-dimensional flat ribbon conductor. This dimensional change reduces the conductor's cross-sectional area perpendicular to the signal flow, minimizing capacitive coupling with surrounding structures and reducing parasitic effects that cause signal interference.
2Reliability
If the control unit is placed close to the button, then control signal reception is improved, but parasitic capacitance from cabling affects button operation
Solution Approach 1:
The patent changes the cable geometry from round to flat ribbon, which reduces the parasitic capacitance per unit length. This parameter change allows the control unit to be positioned closer to the button for improved signal reception while the reduced parasitic capacitance of the flat ribbon cable prevents unwanted switching signals from being generated.
3Ease of operation
If sensitivity adjustment mechanism is added to the housing, then capacitive button sensitivity can be optimized, but device complexity increases
Solution Approach 1:
The patent merges the sensitivity adjustment mechanism with the existing housing structure. The adjustment mechanism is integrated into the housing rather than being a separate component, allowing sensitivity optimization of the capacitive button while minimizing additional structural complexity. The housing serves dual purposes: structural enclosure and sensitivity adjustment functionality.
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 arrangement effectively reduces parasitic losses and simplifies sensitivity adjustment, providing a stable connection and reliable control signal generation for capacitive buttons.
Implementation Method 1
For physical reasons, flat and round conductors generate undesirable parasitic losses. These losses arise from capacitive coupling with the environment and are also known as parasitic capacitance.
Data Source
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AI summary
The invention relates to an assembly (1, 1') for connecting a flat body (2) to a voltage supply, comprising a ribbon cable (4), a control unit (7), and a connection element (6). The supply voltage is provided at least in order to supply the control unit (7) with an electric voltage; the flat body (2) has an electrically conductive structure (3) and a switching surface for generating a control signal; and the control unit (7) is designed to receive the control signal. The control unit (7) is embedded in an insulating material (8, 8') between the flat body (2) and the connection element (6). The invention further relates to a flat body (2) comprising such an assembly and to a method for producing such an assembly.