Self-Capacitance Touch Panel Shielding for Column Interference
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Solution Overview
Problem
Current self-capacitance touch panels experience inaccurate touch monitoring when scanning electrodes column by column due to potential differences between adjacent columns, causing interference with connected touch signal lines and affecting touch performance.
Innovation Solution
Incorporation of signal shielding lines between touch signal lines connected to each column of electrodes and their adjacent columns, with the touch integrated circuit controlling driving signals to minimize potential differences and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If column-by-column scanning is used to reduce power consumption and prevent misdetection, then power consumption is reduced and misdetection is prevented, but potential differences between adjacent columns cause interference with touch signal lines, resulting in inaccurate touch monitoring
Solution Approach 1:
The patent introduces shielding lines as intermediary elements positioned between adjacent touch electrode columns. These shielding lines act as mediators that block the harmful electromagnetic field coupling between columns, preventing interference with the touch signal lines while allowing the column-by-column scanning operation to continue effectively.
Solution Approach 2:
The patent extracts and separates the harmful electromagnetic fields between adjacent columns by introducing dedicated shielding lines. These shielding lines isolate the electromagnetic interference from the touch signal transmission path, effectively removing the harmful effect while preserving the beneficial column-by-column scanning operation.
2Use of energy by moving object
If column-by-column scanning is used, then power consumption is reduced, but potential differences between scanned column and adjacent columns cause interference with touch signal lines
Solution Approach 1:
The shielding lines serve as intermediary protective elements that enable the low-power column-by-column scanning operation to function reliably. By blocking electromagnetic interference between columns, the shielding lines allow the system to maintain accurate touch monitoring while continuing to operate in the energy-efficient scanning mode.
3Device complexity
If touch signal lines are connected directly without shielding, then device complexity is reduced, but interference from adjacent columns causes inaccurate touch monitoring
Solution Approach 1:
The patent introduces shielding lines as intermediary protective elements positioned between adjacent touch electrode columns. These shielding lines act as mediators that block the harmful electromagnetic field coupling between columns, preventing interference with the touch signal lines while allowing the column-by-column scanning operation to continue effectively.
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 signal shielding lines effectively minimize interference between adjacent columns, enhancing the accuracy of touch monitoring and improving overall touch performance of the self-capacitance touch panel.
Implementation Method 1
a plurality of signal shielding lines, and the signal shielding line is disposed between a plurality of touch signal lines connected to each column of the touch electrodes and two columns of the touch electrodes adjacent to the each column of the touch electrodes
Data Source
AI summary
The present application provides a self-capacitance touch panel, a signal shielding line is disposed between a plurality of touch signal lines connected to each column of touch electrodes and two columns of the touch electrodes adjacent to the each column of touch electrodes. With the signal shielding line, an interference of each column of the touch electrodes and their connected touch signal lines from two adjacent columns of the touch electrodes and their connected touch signal lines is reduced, so as to make a touch monitoring of a column of the touch electrodes being scanned more accurate.