Hollowed Touch Electrode Reducing Cathode Interference
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Solution Overview
Problem
The close proximity between the cathode and touch electrodes in touch display panels leads to interference, reducing touch sensitivity and potentially disabling the touch function.
Innovation Solution
The interior of touch electrodes, specifically inductive and drive electrodes, is hollowed out to reduce the relative area between the electrodes and the cathode, thereby decreasing inductive capacitance and alleviating interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the distance between the cathode and touch electrode is reduced to achieve thinner panel thickness, then the panel thickness is improved, but the touch sensitivity deteriorates due to increased interference
Solution Approach 1:
The patent extracts the problematic overlapping region between the cathode and touch electrode by hollowing out the interior of the touch electrode. This removes the source of parasitic capacitance while preserving the electrode's outer dimensions and touch detection functionality, thereby maintaining thin panel thickness without sacrificing touch sensitivity
Solution Approach 2:
The patent applies local quality modification by creating a hollow interior only in specific regions of the touch electrode where it overlaps with the cathode. The electrode maintains its full outer dimensions and conductivity for touch detection, while the localized hollow region eliminates interference, achieving both thinness and touch sensitivity
2Measurement precision
If the relative area between the touch electrode and cathode is reduced to decrease inductive capacitance, then the touch sensitivity is improved, but the electrode area is reduced
Solution Approach 1:
The patent extracts only the harmful overlapping portion of the electrode area that creates parasitic capacitance with the cathode. By hollowing out the interior of the electrode in the overlap region, it removes the source of interference while preserving the electrode's outer footprint and effective touch detection area
Solution Approach 2:
The patent modifies the electrode's internal structure locally in the region overlapping with the cathode, creating a hollow interior only where interference occurs. This localized modification reduces parasitic capacitance without affecting the electrode's overall area or its ability to detect touches across the display surface
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 design enhances touch sensitivity by reducing interference from the cathode, allowing for more accurate capacitance detection and improved touch functionality.
Implementation Method 1
an interior of at least one touch electrode is hollowed out to reduce a relative area between the touch electrode and the cathode
Data Source
AI summary
The disclosure discloses a touch display panel and a touch display device. The touch display panel includes a cathode and a number of touch electrodes, wherein an interior of at least one touch electrode is hollowed out to reduce a relative area between the cathode and the touch electrode. The relative area between the touch electrode and the cathode of the touch display panel may be reduced by hollowing out the interior of at least one touch electrode, thereby reducing the inductive capacitance between the touch electrode and the cathode.