Proximity Switch with Electroluminescent Backlighting
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Solution Overview
Problem
Existing automotive interior switch assemblies, which combine mechanical switches and backlighting, occupy excessive space due to the size requirements of mechanical switches and traditional lighting technologies.
Innovation Solution
Integration of a proximity switch with an electroluminescent element, where the electrode of the electroluminescent element is partially defined by the electrically conductive portions of the proximity switch, to reduce packaging space by using a multilayered light panel with a translucent outer layer, a switch portion, and a base portion, allowing for compact backlighting and switching functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If mechanical switches and traditional LED backlighting are used in switch assemblies, then switching functionality and illumination are achieved, but the overall assembly occupies excessive space
Solution Approach 1:
The patent combines the proximity switch electrode and electroluminescent element electrode into a single integrated structure. The first and second electrically conductive portions of the proximity switch serve dual functions as both switch contacts and electroluminescent electrodes, eliminating the need for separate components and reducing overall assembly size
Solution Approach 2:
The electrically conductive portions of the proximity switch are designed to perform multiple functions: they serve as switch contacts for proximity detection and simultaneously as electrodes for the electroluminescent backlighting element. This multi-functionality reduces the number of components needed in the assembly
2Volume of moving object
If proximity switches are integrated into automotive interiors, then space is reduced compared to mechanical switches, but additional circuitry for proximity detection is required
Solution Approach 1:
The patent merges the proximity switch circuitry and electroluminescent control circuitry into a unified system. The same electrically conductive portions that detect proximity are used to drive the electroluminescent element, consolidating control functions and reducing overall circuit 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
This configuration significantly reduces the overall size of switch assemblies in vehicles by combining proximity sensing and electroluminescent backlighting, enabling more compact and efficient use of space within vehicle interiors.
Implementation Method 1
electroluminescent element is disposed beneath the outer layer to provided backlighting to the outer layer
Implementation Method 2
first and second electrically conductive switch portions that are arranged to form an electric field that emanates through the outer layer when the first proximity switch is energized
Data Source
AI summary
A light panel includes an outer layer, a first proximity switch, an electroluminescent element and a base portion. The outer layer includes a translucent portion. The first proximity switch is disposed beneath the outer layer and has first and second electrically conductive switch portions that are arranged to form an electric field that emanates through the outer layer when the first proximity switch is energized. The electroluminescent element is disposed beneath the outer layer to provided backlighting to the outer layer. One of the first and second electrically conductive switch portions of the first proximity switch forms at least a portion of an electrode of the electroluminescent element. The base portion is disposed beneath the electroluminescent element and the first proximity switch.