Capacitive Sensor With Decorative Conductive Component
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Solution Overview
Problem
Proximity switches used in vehicles lack a decorative aesthetic and often require multiple components for assembly, which can complicate their integration into vehicle designs.
Innovation Solution
A capacitive sensor assembly is developed that incorporates a decorative conductive component, such as chrome or aluminum, as both a trim element and an electrode, with a dielectric layer and a controller to generate and process an activation field, allowing for reduced component count and enhanced aesthetic integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional capacitive switches use separate electrodes and decorative components, then assembly flexibility is maintained, but device complexity and assembly steps increase
Solution Approach 1:
The patent combines the decorative component and the first electrode into a single integrated element. The decorative component is formed with a conductive pattern that directly serves as the first electrode, eliminating the need for separate electrode components and reducing assembly steps while maintaining aesthetic functionality.
Solution Approach 2:
The decorative component is designed to serve dual purposes: it provides aesthetic appearance and simultaneously functions as an active electrode for capacitive sensing. This multi-functionality reduces the overall component count and simplifies the switch assembly structure.
2Shape
If decorative components are added to proximity switches, then aesthetic appearance is improved, but manufacturing complexity increases
Solution Approach 1:
The decorative pattern and electrode pattern are merged into a single conductive design on the decorative component. This integration allows the aesthetic element to be manufactured as part of the electrode structure, eliminating separate manufacturing steps for electrodes and reducing overall manufacturing complexity.
3Reliability
If multiple separate components are used in capacitive switches, then functional separation is maintained, but assembly time and complexity increase
Solution Approach 1:
The first electrode and decorative component are merged into a single integrated element, reducing the number of components that need to be assembled. This integration maintains the functional separation of electrodes through the dielectric layer while significantly reducing assembly time and 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 solution provides a visually appealing and functionally efficient capacitive proximity switch that integrates a decorative metal trim with sensor functionality, reducing assembly complexity and enhancing user interaction, while maintaining effective detection of user inputs.
Implementation Method 1
capacitive sensors to generate a sense activation field and sense changes to the activation field
Implementation Method 2
a second electrode dielectrically isolated from the first electrode and electrically coupled therewith to generate an activation field
Data Source
AI summary
A capacitive sensor and switch assembly is provided. The assembly includes a first electrode forming a decorative conductive component on a vehicle, and a second electrode dielectrically isolated from the first electrode and electrically coupled therewith to generate an activation field. The assembly also includes a dielectric layer disposed between the first and second electrodes, and a controller for processing a signal generated from the activation field and sensing an object, wherein the controller determines activation of a switch based on the signal generated from the activation field.