Touch Sensor Panel Electrode Arrangement for Signal Splitting
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Solution Overview
Problem
Touch sensor panels with driving and receiving electrodes on the same layer experience horizontal and vertical signal splits when not held by a user, leading to incorrect multi-touch recognition and device malfunctions.
Innovation Solution
The electrodes are arranged such that driving electrodes are placed on both sides of receiving electrodes, with specific electrical connections to prevent signal splitting, and the touch window area is configured to avoid consecutive electrodes, ensuring proper touch signal interpretation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If driving electrodes and receiving electrodes are implemented on the same layer, then manufacturing cost is reduced and structure is simplified, but signal splitting occurs in floating state
Solution Approach 1:
The touch sensor panel divides the electrode array into distinct driving electrodes and receiving electrodes arranged in alternating columns. This segmentation allows each electrode type to be optimized for its specific function while maintaining a cost-effective single-layer structure, preventing signal splitting by ensuring proper signal directionality.
Solution Approach 2:
Different columns of electrodes are assigned different functions: odd columns as driving electrodes and even columns as receiving electrodes. This local differentiation of electrode roles within the same layer enables accurate touch detection while maintaining manufacturing simplicity and preventing signal interference.
2Reliability
If electrodes are arranged in alternating columns, then signal splitting is prevented, but electrode density and complexity increase
Solution Approach 1:
The electrode arrangement uses asymmetric column assignment where odd columns serve as driving electrodes and even columns as receiving electrodes. This asymmetric pattern breaks the symmetry that causes signal splitting in floating state, improving signal accuracy while maintaining a regular, manageable structure.
Solution Approach 2:
The patent resolves signal splitting by introducing a column-based dimensional differentiation rather than relying on layer separation. By assigning different functions to electrodes in different columns (spatial dimension), the patent prevents signal interference without increasing vertical layer complexity.
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 arrangement effectively prevents horizontal and vertical signal splits, ensuring accurate touch input recognition and preventing device malfunctions in floating states.
Implementation Method 1
The touch sensor panel applies a driving signal to a driving electrode and determines whether a touch is input from a signal input through a receiving electrode
Data Source
AI summary
A touch sensor panel according to an exemplary embodiment of the present invention is a touch sensor panel in which a plurality of driving electrodes and a plurality of receiving electrodes are arranged on the same layer, in which the plurality of receiving electrodes is arranged along a plurality of rows and columns, the plurality of driving electrodes is arranged such that at least one driving electrode is disposed at each of both sides with respect to each receiving electrode, and the driving electrode arranged at the left side and the driving electrode arranged at the right side with the receiving electrode interposed therebetween are electrically connected with each other.