Touch Display Device With Ghost Data Removal
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Solution Overview
Problem
Touch display devices face challenges in reducing the complexity and manufacturing costs associated with the high number of touch lines and channels required for accurate touch sensing, which increases with the size of the touch panel, leading to inefficiencies and misrecognized touches.
Innovation Solution
A touch display device with a touch sensor structure that divides the sensing area into subareas, where multiple touch electrodes are connected to fewer touch lines, reducing the overall number of touch lines and channels, and incorporates a touch driving circuit to differentiate between genuine touches and ghost data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of touch electrodes increases to cover a larger touch panel area, then the touch sensing coverage is improved, but the number of touch lines and touch channels increases leading to increased device complexity and manufacturing costs
Solution Approach 1:
Multiple touch electrodes are electrically connected to a single touch line, merging the function of multiple electrodes into fewer signal lines. This reduces the number of touch channels required in the touch sensing circuit while maintaining comprehensive touch sensing coverage across the entire touch panel area.
Solution Approach 2:
Each touch line serves multiple touch electrodes simultaneously, making the touch line multi-functional. A single touch line can sense touches from multiple electrodes, reducing the overall number of channels needed in the system.
2Measurement precision
If each touch electrode is connected to a separate touch line for accurate touch sensing, then the touch sensing precision is improved, but the manufacturing cost and circuit complexity increase
Solution Approach 1:
Adjacent touch electrodes are grouped and connected to common touch lines, merging multiple sensing functions into fewer circuits. This reduces the number of manufacturing steps and circuit components while maintaining adequate touch sensing precision through the distributed electrode arrangement.
3Device complexity
If the number of touch channels is reduced to decrease device complexity, then the manufacturing cost is reduced, but ghost touches (misrecognized touches) may increase
Solution Approach 1:
The touch panel is divided into multiple regions with different electrode connection patterns. By segmenting the touch sensing area and using different connection strategies in different regions, the system reduces overall complexity while maintaining reliable touch recognition through localized optimization.
Solution Approach 2:
Different areas of the touch panel use different electrode connection configurations optimized for their specific requirements. This allows the system to reduce complexity in certain regions while maintaining high reliability in critical sensing areas, achieving an overall balance between complexity and accuracy.
Data Source
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AI summary
In a touch display device with a touch sensor structure in which two or more touch electrodes (TE) located in two or more subareas (Au1, Ad1, Au2, Ad2, Am1) are electrically connected to each other via one touch line (TL), it is possible to decrease the number of touch channels. With a touch sensor structure in which two or more touch electrodes (TE) are connected to each touch line (TL) in a touch electrode connecting structure capable of removing ghost data, it is possible to improve touch sensitivity greatly.