Auxiliary Electrode Design for Non-Right Angle Touch Panel Corners
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Solution Overview
Problem
Capacitive touch panels with non-right angle corners experience reduced capacitance and touch sensitivity due to the removal of vertical and horizontal electrodes, which compromises their design and functionality.
Innovation Solution
Incorporating an auxiliary electrode on the non-right angle corner region of the touch panel, electrically connected to adjacent second stripe electrodes, increases the overlapped area between the first and second electrodes, thereby enhancing capacitance and touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If vertical and horizontal electrodes are removed around the corners to meet bevel angle or non-right angle shape design requirements, then the appearance and shape fitting of the touch panel are improved, but the capacitance and touch sensitivity in the corner region are reduced
Solution Approach 1:
The touch panel electrodes are segmented into different regions: standard stripe electrodes in the main area and auxiliary electrodes specifically added in the corner regions. This segmentation allows the corner regions to have enhanced capacitance through additional auxiliary electrodes while the main area maintains its original electrode structure, thus resolving the contradiction between shape design and touch sensitivity.
Solution Approach 2:
The patent applies local quality by adding auxiliary electrodes specifically in the corner regions where touch sensitivity is compromised due to bevel angles or non-right angle shapes. The auxiliary electrodes are strategically positioned only in these problematic areas, leaving the main electrode structure unchanged. This localized enhancement improves touch sensitivity in the corner regions without affecting the overall design, thus resolving the contradiction between shape design requirements and touch sensitivity.
2Shape
If vertical and horizontal electrodes are removed around the corners to meet design requirements, then the appearance of the touch panel is enhanced, but the capacitance in the corner region decreases
Solution Approach 1:
The electrode system is segmented into standard stripe electrodes for the main area and auxiliary electrodes for the corner regions. This segmentation allows the corner regions to have additional capacitance through auxiliary electrodes while maintaining the desired bevel angle or non-right angle shape appearance, thus resolving the contradiction between appearance enhancement and capacitance maintenance.
Solution Approach 2:
The patent applies local quality by adding auxiliary electrodes specifically in the corner regions where capacitance is reduced due to shape design. The auxiliary electrodes are positioned only in these areas to locally enhance capacitance without affecting the overall appearance design, thus resolving the contradiction between appearance and capacitance.
3Reliability
If auxiliary electrodes are added in the non-right angle corner region, then the capacitance and touch sensitivity in the corner region are improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by adding auxiliary electrodes only in the corner regions where touch sensitivity is compromised, rather than modifying the entire electrode structure. This localized approach improves touch sensitivity in the specific problem areas while minimizing the increase in overall device complexity, as the main electrode structure remains unchanged.
Solution Approach 2:
The electrode system is segmented into standard stripe electrodes and auxiliary electrodes, with the auxiliary electrodes being simple additions in the corner regions. This segmentation allows for a straightforward implementation that improves touch sensitivity without significantly complicating the overall device structure, as the auxiliary electrodes can be integrated into the existing electrode layout.
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 auxiliary electrode design effectively increases capacitance on non-right angle corners, improving touch sensitivity and ensuring consistent performance across the touch panel, even in bevel or irregularly shaped areas.
Implementation Method 1
The auxiliary electrode is disposed on the non-right angle corner region. An included angle between at least a part of the auxiliary electrode and the second direction is substantially less than 90 degrees, and the auxiliary electrode is electrically connected to at least one of the second stripe electrodes adjacent to the auxiliary electrode. The disposition of the auxiliary electrode electrically connected to the second stripe electrode can increase the overlapped area between the first electrode and the second electrode; accordingly, the capacitance exhibited on the non-right angle corner region of the touch panel can increase
Data Source
AI summary
A touch panel having at least one non-right angle corner region on a corner of the touch panel is provided. The touch panel includes a first electrode and a second electrode. The first electrode crosses the second electrode, and the first electrode is electrically isolated from the second electrode. The first electrode includes a plurality of first stripe electrodes extending along a first direction. The second electrode includes a plurality of second stripe electrodes and at least one auxiliary electrode. The second stripe electrodes extend along a second direction. The auxiliary electrode is disposed on the non-right angle corner region. An included angle between the auxiliary electrode and the second direction is less than 90 degrees. The auxiliary electrode is electrically connected to at least one of the second stripe electrodes adjacent to the auxiliary electrode.