Touch Module Metal Mesh Electrode Overlap for Holes
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Solution Overview
Problem
In touch display screens with holes or arc-shaped corners, the area of touch units at these positions is smaller, leading to low capacitive signal intensity and poor touch accuracy, affecting user experience.
Innovation Solution
A touch module with a carrier layer, first metal mesh layer, and second metal mesh layer are laminated, where the second metal mesh layer includes touch units and electrodes positioned to form a target touch unit, enhancing capacitive signal intensity by overlapping regions corresponding to holes or arc-shaped corners, thereby improving touch accuracy and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If touch units are disposed at holes or arc-shaped corners to accommodate display requirements, then the display screen can have holes for apparatuses and rounded corners for comfort, but the area of touch units at these positions becomes smaller, leading to low capacitive signal intensity and poor touch accuracy
Solution Approach 1:
The patent introduces a multi-layer structure with first and second metal mesh layers disposed at different positions. The first metal mesh layer is disposed at a first position corresponding to the hole or arc-shaped corner, and the second metal mesh layer is disposed at a second position that overlaps with the first position. This multi-dimensional layering increases the effective area for capacitive signal generation without increasing the planar footprint, thereby improving touch accuracy while maintaining the display screen's shape requirements.
Solution Approach 2:
The patent uses a composite structure combining multiple metal mesh layers with different configurations. The first metal mesh layer and second metal mesh layer are composed of conductive materials and are arranged in a composite manner to enhance the capacitive signal intensity. This composite structure allows the touch unit to maintain small planar area while achieving high touch accuracy through the synergistic effect of multiple layers.
2Area of stationary object
If touch units at holes or arc-shaped corners are made smaller to fit the display layout, then the display can accommodate apparatuses and have rounded corners, but the capacitive signal intensity decreases, affecting touch sensitivity
Solution Approach 1:
The patent compensates for the reduced planar area by extending the touch unit structure into the third dimension through multiple metal mesh layers. The first metal mesh layer and second metal mesh layer are disposed at different positions with overlapping projections, effectively increasing the capacitive signal generation area without increasing the planar footprint. This dimensional extension maintains touch sensitivity despite the smaller visible area at holes and arc-shaped corners.
Solution Approach 2:
The patent divides the touch unit into multiple segments across different layers. The first metal mesh layer and second metal mesh layer are segmented structures that, when combined, create a composite touch unit with enhanced capacitive signal intensity. This segmentation allows each layer to contribute to the overall signal strength, compensating for the limited planar area available at holes and arc-shaped corners.
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 solution significantly improves touch accuracy and sensitivity at holes and arc-shaped corners by increasing capacitive signal intensity, making the touch experience better and replacing traditional conductive layers with thinner, more effective metal mesh electrodes.
Implementation Method 1
the first electrode and the second electrode are configured to form a target touch unit
Data Source
AI summary
A touch module includes a carrier layer, a first metal mesh layer, an insulating layer, and a second metal mesh layer which are stacked; the first metal mesh layer includes a second electrode located in a third region, the second metal mesh layer includes a first electrode located in a second region, and the third region overlaps the second region. In this case, the capacitive signal intensity of a touch unit formed by the first electrode and the second electrode is large. On this basis, by arranging the second region and the third region at a position corresponding to an opening or an arc corner of the display screen, the touch precision and the touch sensitivity at the position can be effectively improved.


