OLED Lighting Device Capacitive Switch Crosstalk Prevention
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Solution Overview
Problem
Optoelectronic lighting devices with integrated OLEDs and switching means suffer from crosstalk issues due to electrode misalignment, leading to unintended control effects and reduced ease of use, as well as design restrictions.
Innovation Solution
A lighting device with a capacitive switching means and OLEDs on a substrate, featuring a non-conducting spacing of 100 μm to 700 μm between electrodes to prevent crosstalk, allowing clear assignment and increased design freedom, with transparent or semi-transparent conductive oxide layers and thin-film encapsulation for protection and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the spacing between the electrode of the switching means and the electrode of the OLED is reduced, then the ease of operation and design freedom are improved, but crosstalk occurs leading to unintended control effects and reduced measurement precision
Solution Approach 1:
The patent applies parameter changes by establishing a specific spacing range (100-700 μm, preferably 400-600 μm) between the OLED electrode and switching means electrode. This quantitative parameter optimization resolves the contradiction by finding the optimal distance that prevents crosstalk while maintaining ease of operation and clear visual assignment.
2Measurement precision
If the spacing between the electrode of the switching means and the electrode of the OLED is increased, then crosstalk is avoided, but the ease of operation and design freedom are reduced
Solution Approach 1:
The patent resolves this contradiction by defining an upper bound for the spacing parameter (700 μm, preferably 600 μm). Within this optimized range, crosstalk is prevented while the switching means remains visually assignable to the luminous area, preserving design freedom and ease of operation.
3Ease of manufacture
If the electrode of the switching means is arranged in the same plane as the OLED electrode, then the ease of manufacture is improved, but crosstalk occurs leading to unintended control effects
Solution Approach 1:
The patent applies local quality by maintaining the same-plane arrangement for manufacturing simplicity while introducing a localized non-conducting spacing (100-700 μm) between specific electrodes. This localized separation eliminates crosstalk at the critical interface while preserving the overall planar structure for ease of manufacture.
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 specified spacing between electrodes optimizes signal evaluation, preventing crosstalk and enhancing user interaction while maintaining design flexibility and protecting the device with transparent conductive layers and encapsulation.
Implementation Method 1
between the one electrode of the lighting means and the electrode of the switching means in the plane there is a non-conducting spacing, which is between 100 μm and 700 μm
Implementation Method 2
with transparent or semi-transparent conductive oxide layers
Implementation Method 3
and thin-film encapsulation for protection and visibility
Data Source
AI summary
The invention relates to a lighting device comprising an illuminant embodied as an OLED, and comprising a capacitive switching means, which are arranged on a substrate, wherein the illuminant has a first electrically conductive electrode and a second electrically conductive electrode, wherein a layer comprising organic, electroluminescent material is arranged between the first electrode and the second electrode, wherein the switching means has an electrode, wherein one electrode from the first electrode or the second electrode of the illuminant together with the electrode of the switching means is arranged in one plane, wherein a nonconductive spacing amounting to between 100 μm and 700 μm, more particularly between 400 μm and 600 μm, is present between said one electrode of the illuminant and the electrode of the switching means in the plane.