Touch Window Sensing Electrode Segmentation for Multi-Touch Accuracy
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Solution Overview
Problem
Current touch panels face challenges in accurately detecting multiple touch points, particularly when points are touched on the same line, leading to reduced touch sensitivity and complexity in electrode pattern arrangement.
Innovation Solution
A touch window with a substrate and a sensing electrode featuring multiple sensing parts with different directionalities, allowing for precise detection of touch points on the same line in both horizontal and vertical directions, and the use of a dummy pattern to improve visibility and optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional sensing electrode pattern is used, then the structure is simple, but the touch recognition accuracy deteriorates when multiple points on the same line are touched
Solution Approach 1:
The sensing electrode is divided into multiple sensing parts with different directionalities. Each sensing part is oriented in a specific direction (e.g., horizontal, vertical, diagonal) to detect touch points along that orientation. This segmentation allows the electrode to accurately recognize multiple touch points on the same line by using the appropriately oriented sensing parts, resolving the contradiction between maintaining simple structure and improving touch recognition accuracy.
2Measurement precision
If the sensing electrode pattern is made visible for detection purposes, then the pattern recognition is improved, but the optical characteristics and visibility of the display deteriorate
Solution Approach 1:
Dummy parts are added to the sensing electrode pattern to create local variations in the electrode structure. These dummy parts serve dual purposes: they enhance the detectability of the sensing electrode pattern by providing reference features for detection, while their strategic placement and design ensure they do not significantly impact the overall optical characteristics and display visibility. This local modification approach resolves the contradiction between improving pattern detection and maintaining display quality.
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
Enhances touch recognition accuracy, enables multi-touch functionality, and simplifies the electrode pattern arrangement, improving touch sensitivity and visibility by preventing pattern recognition.
Implementation Method 1
In the capacitive touch panel, the position of the touch point is detected by detecting the variation of capacitance between electrodes when a finger of the user touches the capacitive touch panel.
Data Source
AI summary
Disclosed is a touch window including a substrate, and a sensing electrode on the substrate. The sensing electrode comprises a plurality of sensing parts having directionalities different from each other.