Self-Capacitance Touch Panel Redundant Electrodes Trace Impedance
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Solution Overview
Problem
Current self-capacitance touch panels face issues with excessive trace impedance, leading to increased resistance, capacitance load, and power consumption, which affects touch performance and reliability, especially as panel size increases.
Innovation Solution
Incorporating redundant electrodes connected in parallel with signal transmission lines to reduce impedance, positioned either in the same layer as touch electrodes or through-holes, simplifying manufacturing and reducing trace impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the panel size is increased, then the coverage area is improved, but the trace impedance of signal transmission lines increases
Solution Approach 1:
The patent introduces redundant electrodes that are electrically connected in parallel with the signal transmission lines. This segmentation of the electrical path allows the signal to be distributed across multiple parallel conductive paths, effectively reducing the overall trace impedance without requiring changes to the panel size
Solution Approach 2:
The patent adds redundant electrodes as an additional dimensional element to the existing touch electrode structure. These redundant electrodes are positioned and connected in parallel with the signal transmission lines, creating a multi-path electrical configuration that reduces impedance while maintaining the original panel geometry
2Use of energy by moving object
If the trace impedance is reduced, then the power consumption is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the redundant electrodes with the existing touch electrode structure by forming them in the same conductive layer. This integration allows the redundant electrodes to be manufactured using the same processes as the touch electrodes, minimizing additional manufacturing complexity while achieving the power consumption benefits of reduced trace impedance
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
This configuration enhances touch performance by reducing trace impedance, improving response times and power efficiency, and simplifying manufacturing processes, thereby addressing the limitations of existing self-capacitance touch panels.
Implementation Method 1
at least one of the signal transmission lines is connected to one or more of the redundant electrodes... each of the signal transmission lines is connected in parallel with at least one of the redundant electrodes, so as to reduce impedance of all of the signal transmission lines
Data Source
AI summary
The present application discloses a self-capacitance touch panel and a touch display panel. One or more of redundant electrodes are connected in parallel with each of signal transmission lines of the self-capacitance touch panel to reduce trace impedance of the signal transmission lines (especially for the signal transmission lines connected to self-capacitance touch electrodes at a far end). Problems of inability to drive touches, large touch power consumption, and marked incongruities in touch performance of different regions caused by excessive trace impedance are relieved.