Touch Electrode Grid Layout for Lower Capacitance Overlap
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Solution Overview
Problem
Existing touch electrode structures in display panels result in increased capacitance and prolonged charging times in overlapping regions, affecting touch control sensitivity and accuracy.
Innovation Solution
A touch substrate design with first and second touch electrodes arranged in different directions, featuring non-overlapping edges of conductive grids in overlapping regions, reducing capacitance and enhancing sensitivity by optimizing electrode arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If touch electrodes are arranged in overlapping regions to improve touch coverage, then the touch control area is improved, but the capacitance increases and charging time is prolonged
Solution Approach 1:
The touch electrodes are segmented into first touch electrodes extending in a first direction and second touch electrodes extending in a second direction, forming a grid-like arrangement. This segmentation allows the electrodes to cover a larger area while controlling the overlapping regions to reduce capacitance and charging time.
Solution Approach 2:
The patent applies different electrode configurations to different regions: in overlapping regions, the first and second touch electrodes are arranged to minimize capacitance, while in non-overlapping regions, the electrodes provide full coverage. This local optimization resolves the contradiction between coverage area and charging time.
2Area of stationary object
If touch electrodes are arranged in overlapping regions to improve touch coverage, then the touch control area is improved, but the touch control sensitivity deteriorates
Solution Approach 1:
By segmenting the touch electrodes into two sets with different orientations (first touch electrodes in a first direction, second touch electrodes in a second direction), the patent creates a grid structure that improves sensitivity in multiple directions while maintaining broad coverage.
Solution Approach 2:
The first and second touch electrodes are arranged asymmetrically with respect to each other, with each set extending in a different direction. This asymmetric arrangement optimizes the electric field distribution to improve touch control sensitivity across the entire touch surface.
3Area of stationary object
If touch electrodes are arranged in overlapping regions to improve touch coverage, then the touch control area is improved, but the touch control accuracy deteriorates
Solution Approach 1:
The segmentation of touch electrodes into two orthogonal sets creates a grid pattern that provides both broad coverage and precise location detection. The intersection points of the grid segments serve as accurate touch detection points while maintaining extensive coverage.
Solution Approach 2:
The patent optimizes the local electrode arrangement in overlapping regions to balance coverage and accuracy. By controlling the overlap patterns and electrode dimensions, the system achieves high touch control accuracy within each local region while maintaining overall broad coverage.
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 design minimizes overlapping areas between touch electrodes, shortening charging times and improving touch control sensitivity and accuracy.
Implementation Method 1
allow a plurality of overlapping regions and a plurality of non-overlapping regions to be formed between the plurality of first touch electrodes and the plurality of second touch electrodes
Data Source
AI summary
A touch substrate, a display panel, and an electronic device are provided. The touch substrate includes a base substrate, and first touch electrodes and second touch electrodes on the base substrate; the first touch electrodes are arranged in a first direction, with each first touch electrode extending in a second direction; the second touch electrodes are arranged in the second direction, with each second touch electrode extending in the first direction; the first touch electrode and the second touch electrode are spaced apart and insulated from each other; in a direction perpendicular to the base substrate, the first touch electrodes overlap with the second touch electrodes to form overlapping regions; and in the overlapping region, any first edge extending in the first direction in the conductive grid of the first touch electrode does not overlap with the first edge in the conductive grid of the second touch electrode.