Stretch Electrode Layout for 2D Capacitance Sensing
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Solution Overview
Problem
There is a demand for an apparatus capable of sensing stretch in light emitting display apparatuses, which can determine the degree and coordinates of stretch, but such a device is not currently available.
Innovation Solution
The apparatus includes a stretch support substrate with three types of electrodes: driving electrodes extending in two directions, mono-receiving electrodes, and cross-receiving electrodes, designed to detect stretch by analyzing changes in capacitance when the panel is stretched.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single type of electrode is used for stretch sensing, then the device structure is simple, but the measurement precision and ability to determine stretch coordinates is insufficient
Solution Approach 1:
The electrode system is segmented into three distinct types: driving electrodes, mono-receiving electrodes, and cross-receiving electrodes. Each type serves a specific function in the capacitance measurement process, enabling precise determination of both stretch presence and coordinates while maintaining a systematic and organized structure.
Solution Approach 2:
The invention transitions from one-dimensional stretch detection to two-dimensional coordinate detection by introducing cross-receiving electrodes that extend in both first and second directions. This dimensional expansion allows the system to identify not only whether stretch occurs but also the specific coordinates where stretch is detected.
2Adaptability or versatility
If electrodes extend in only one direction, then the manufacturing process is simple, but the adaptability to detect stretch in multiple directions is limited
Solution Approach 1:
The driving electrodes are designed to extend in both first and second directions, making them multi-functional. These electrodes can serve as driving electrodes for both mono-receiving and cross-receiving electrodes, reducing the need for separate electrode structures for different detection directions and simplifying the overall manufacturing process.
Solution Approach 2:
Different regions of the electrode structure have specialized functions: driving electrodes extend in multiple directions to provide comprehensive sensing coverage, mono-receiving electrodes are optimized for detecting stretch in the first direction, and cross-receiving electrodes are configured for detecting stretch in the second direction. This local specialization enables multi-directional detection while maintaining manufacturing feasibility.
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 apparatus effectively determines the presence and degree of stretch by sensing changes in capacitance between electrodes, providing accurate stretch detection.
Implementation Method 1
designed to detect stretch by analyzing changes in capacitance when the panel is stretched
Data Source
AI summary
An apparatus for sensing a stretch can be provided with three different types of stretch electrodes to determine the presence or absence of a stretch. The apparatus for sensing a stretch can include a stretch support substrate configured to be stretched; and a plurality of driving electrodes, a plurality of mono-receiving electrodes, and a plurality of cross-receiving electrodes provided on the stretch support substrate. Each of the plurality of driving electrodes includes a first direction driving electrode extending in a first direction of the stretch support substrate, and a plurality of second direction driving electrodes connected to the first direction driving electrode and extending in a second direction different from the first direction. Each of the plurality of mono-receiving electrodes extends in the second direction, and each of the cross-receiving electrodes extends in the first direction and the second direction.