Array Substrate Touch Electrode Opening Portions
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Solution Overview
Problem
The presence of parasitic capacitance between conductive scan lines and touch electrodes in self-capacitance touch screens reduces touch accuracy due to increased total capacitance, affecting the precision of touch sensing.
Innovation Solution
The formation of opening portions along the overlapping regions between touch electrodes and scan lines/data lines, with the width of these openings matching the width of the corresponding lines, reduces coupling capacitance and improves touch accuracy without breaking the electrodes, allowing them to remain functional.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive scan lines and data lines are used to connect touch electrodes, then electrical connection is achieved, but parasitic capacitance increases reducing touch accuracy
Solution Approach 1:
The patent extracts the harmful overlapping regions between scan/data lines and touch electrodes by creating opening portions in the touch electrode structure. This removes the source of parasitic capacitance while preserving the necessary electrical connections through the non-overlapping portions of the conductive lines.
Solution Approach 2:
The touch electrode is segmented into multiple regions with opening portions at specific locations where scan lines and data lines overlap. This segmentation allows the electrode to maintain electrical connectivity while eliminating parasitic capacitance in critical overlapping zones.
2Measurement precision
If opening portions are formed in touch electrodes to reduce parasitic capacitance, then touch accuracy improves, but electrode continuity may be compromised
Solution Approach 1:
The opening portions are strategically positioned only at locations where scan lines and data lines overlap with touch electrodes. The rest of the touch electrode maintains its continuous structure, ensuring electrical connectivity is preserved while parasitic capacitance is reduced at critical points.
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 approach effectively minimizes parasitic capacitance, enhancing the precision of touch screens by reducing coupling capacitance between touch electrodes and scan/data lines, thereby improving touch accuracy without increasing manufacturing complexity or costs.
Implementation Method 1
reduce the coupling capacitance between the touch electrode and the at least one of the scan line and the data line
Data Source
AI summary
The disclosure is related to an array substrate having a touch function and a display device. The display device comprises a plurality of touch electrodes arranged in an array, a plurality of pixel electrodes, a plurality of scan lines, and a plurality of data lines. The scan lines and the data lines intersect with each other to define pixel regions on the display device. Each of the pixel electrodes is arranged in the corresponding pixel region and electrically connects to the corresponding scan line and the corresponding data line. Each touch electrode corresponds to at least one pixel region; at least an opening portion is formed at the overlapping regions between each of the touch electrode and at least one of the scan lines and the data line to reduce the coupling capacitance. Through the above-described manner, the disclosure can effectively improve the precision of the touch screen.